No. 1722 INSTRUCTIONS FOR MOUNTING, USING, AND CARING FOR BARBETTE CARRIAGE Model of 1917 FOR 12-INCH GUN Model of 1895 Ml (THIRTEEN PLATES) AUGUST 8, 1917 WASHINGTON GOVERNMENT PRINTING OFFICE 1917 No. 1722 INSTRUCTIONS FOR MOUNTING, USING, AND CARING FOR BARBETTE CARRIAGE Model of 1917 FOR 12-INCH GUN Model of 1895 Ml (THIRTEEN PLATES) AUGUST 8, 1917 WASHINGTON GOVERNMENT PRINTING OFFICE 1917 Digitized by the Internet Archive in 2007 with funding from IVIicrosoft Corporation http://www.archive.org/details/forminstructionsOC)unitrich TABLE OF CONTENTS. List of plates 4 General description .' 5 Emplacement 5 Carriage 5 The action of the carriage 5- Principal parts ■ 5 Base ring , 5 Traversing roller system 6 Racer 6 Side frames .' . 6 Working platform 7 Cradle 7 Recoil and counter recoil system 7 Elevating system ^ . 8 Traversing system 10 Azimuth circle and pointer 11 Sight 11 Range disk 11 Lighting apparatus : 12 Firing mechanism 12 Shot tongs 12 Grease cups 12 Implements 12 Assembly 12 Base ring 13 Leveling 13 Distance ring and traversing rollers 13 Racer 13 Clips - 14 Azimuth circle 14 Rear bracket 14 Recoil cylinder assembled to cradle 14 Cradle 14 Elevating-screw beam 14 Traversing bracket •. 14 Front transom 14 Working platform 14 Spring cylinders secured to cradle 14 Gun 14 Spring system assembled 14 Gearing, etc 14 Important points 14 Care of the mount 15 List of weights 15 List of parts 16 Contents of armament chest 16 Abbreviations 17 Piece, number, location, and material 17 (3) 365277 LIST OF PLATES. Plate No. Drawing No. I, Emplacement 10-15-5 II. Longitudinal sections 10-15-6 III. Left and rear elevations 10-15-7 IV. Right and front elevations 10-15-8 V. Base ring : 10-15-9 VI. Racer 10-15-11 VII. Cradle 10-15-26 VIII. Spring and recoil cylinder assemblies 10-15-28 IX. Recoil cylinder 10-15-29 X. Elevating gear assembly 10-15-42 ~KI. Power assembly 10-15-47 XII. Traversing gear assembly 10-15-63 XIII. Spring compressor 10-15-86 (4) INSTRUCTIONS MOUNTING, USING, AND CARING FOR BARBETTE CARRIAGES, MODEL OF 1917, FOR 12-INCH GUNS, MODEL OF 1895 Ml. (13 Plates.) (The parts in italics are of particular importance or concern the safety of the carriage and should be especially noted.) GENERAL DESCRIPTION. Emplacement (Plate I). — The emplacements for these carriages are constructed entirely of concrete with a low parapet and permit of 360° traverse. Thirty-six foundation bolts for holding the base ring are set in the concrete when it is laid, and 12 depressions are made for thrust plates. The Carriage (Plates II, III, and IV). — The carriage is of the Barbette type, mounting a 12-inch gun, model 1895 M-1. The action of the carriage is as foUows: Upon firing, the gun travels to the rear 30 inches in recoil in the cradle, carrying with it the piston in the cyHnder. A portion of the energy of recoil sufficient to return the gun to its firing position is absorbed by the counterrecoil springs. The return of the gun to the firing position is eased by the action of the counterrecoil buffer. Principal Parts. — The principal parts of the carriage are: The base ring, distance ring, traversing rollers, racer, side frames, plat- forms, cradle, transoms and clips, spring and recoil cylinders, ele- vating system, traversing system, sight, fighting and firing circuits^ and electrical and motor equipment. The accessories consist of shot trucks, shot tongs, and implements. Base King (Plate V). — The base ring is made of cast steel No. 2, and is a W-shaped section, which gives vertical rigidity when leveling and releveling. The top of the middle member is machined to form the conical roller path. The base ring is made in two sections, bolted together by eighteen 2^-inch bolts. It is drilled for 36 foundation bolts, 12 levefing screw holes, and 10 holes tapped for 2^-inch stand- ard pipe for the pouring of grout. The outside diameter of the base (5) ring is IS feot 4 iiK^fes. "^lie base ring has the lower roller path on its upper surface and has an annular flange on its inner edge forming the pintle for the carriage. The traversing rack is bolted to the inner side of the annular ring. The cavities on the outside of the roller path are drained through pipes inserted in the casting into the pockets on the inner side of the roller path. The inner pockets are drained into the well in the center of the carriage. The wrench holes on the inside of the base ring are provided with a cover having a 1-inch drain "hole. Traversing-Roller System. — The racer rests and is traversed upon 24 rollers whose axes are maintained in a radial position by bearings bolted to a distance ring. The rollers are of cast steel No. 3 and are soHd, with an axle or traversing-toUer pin forced into a hole bored in the center of the roller. The distance ring is of cast steel in six sections, bolted together. Bearings of bronze No. 3 for the traversing-roUer pins are bolted to the uppe£,§ide of the distance ring. These bearings are provided with a loop at the^top by means of which the traversing roller may be hf ted out through holes in the top of the racer. Racer (PI. VI).— The racer is of cast steel No. 2, 18 feet 4.5 inches in diameter, and is cast in two pieces, bolted together by sixteen 2.5- inch bolts. It is of box cross section and has the upper roUer path on its under surface. An annular flange on its inner edge is lined with bronze, fitting on the pintle of the base ring with a diameter clearance of 0.03 inch. Upon its top surface the side frames and transoms are bolted and keyed. Two openings sufiiciently large to remove a traversing roller are provided at each side of the racer. The holes are kept habitually covered by steel plates provided for this purpose. Four oil holes passing through the racer are provided for oiling the pintle surface and 16 oil holes for oiling the traversing- roller bearings. One large steel clip secured to the racer in front and one in the rear engage under a continuous lip on the outside of the base ring and prevent possible overturning. Side Frames. — Two side frames, one right and one left, are bolted and keyed to the upper side of the racer. They are made of cast steel No. 3 and are united at their front end by a transom and at the rear end by the rear bracket. On top of each side frame is a bear- ing for a cradle trunnion. In the lower part are the bearings for the elevating screw beam. The bearings are provided with liners or bushings of bronze No. 4. The cap squares are of cast steel No. 3. The transom is of cast steel No. 3 and provides a bolting surface for the front platform in addition to its primary function of rigidly uniting the front ends *of the side frames. The rear bracket is of cast steel No. 3,' is bolted between the rear ends of the side frames, provides a bolting surface for the side platform, and also serves as a platform at the rear of the gun. Working Platform. — The working platform is attached to the side frames by means of two front brackets and six column brackets. The rear bracket also serves as a support for the working platform. The tops of the brackets are at a level one-half inch below the level of the loading platform of the emplacement. The outer end of each of the column brackets is supported by a cast-steel column, the lower end of which is bolted to the top side of the racer. To the outer end of the brackets is bolted an angle iron bent to form a circle 11 feet 7.75 inches radius. Steel plate one-half inch thick is bolted to the brackets and angle iron to form a working platform level with the loading platform of the emplacement. A steel ladder extends from the racer to the working platform. Cradle (PL VII). — The cradle is of cast steel No. 2 and is pro- vided with trunnions, which rest in bearings in the side frames. It is bored on the inside and fitted with eight liners of Tobin bronze, which support the weight of the gun. Keyways are provided on top and bottom in which the key on the gun fits to hold the gun in proper position. Four sets of lugs, two on the top and two on the bottom, are provided for holding the four spring cylinders. Between the two lower spring cylinders, on the bottom of the cradle, is the bearing for the recoil cylinder. Recoil and Counter-Recoil Systems (Pis. VIII and IX). — The recoil cylinder is of cast steel No. 3, finished aU over. There are three longitudinal throttling grooves ,45° wide cut in the bore of the cyl- inder. These grooves are 35 inches long and vary in depth from to 0.5293 inch. The recoil-cylinder head contains the female part of the counter-recoil buffer, the corresponding male part being the front end of the piston rod. A bypass from the counter-recoil buft'er to the recoil cylinder is provided by means of an 0.875-inch hole lead- ing into a 1-inch hole, which in turn leads into the cyUnder. The adjustment of the counter-recoil buffer is accomplished by means of the adjusting plug, the lower end of which fits into the 0.875-inch hole. The piston rod is of forged steel C, to which is screwed the piston, made of bronze No. 4. The rear end of the piston rod is threaded for the piston-rod nuts, one front and one rear. These nuts are respectively in front and rear of the yoke by means of which the recoil band of the gun is connected to the piston rod. These nuts are of forged steel No. 3. The front nut is held in place by a 1-inch set screw, and the rear nut is prevented from turning by two clamp- ing screws. The piston rod passes through the rear«end of the recoil cylinder througli an opening which is lined with a bronze bushing. The rear end of the cylinder is provided with a follower and stuffing-box gland of bronze and eight rings of Garlock's waterproof hydraulic packing to prevent leakage of oil. To the front end of the recoil cylinder is bolted the recoil-cylinder head, which is of cast steel No. 3, fitted with a bronze bushing to prevent the cutting of the piston rod. An expansion chamber of cast steel is placed on the top of the cradle and connected by expansion pipes of steel tubing 1.5 inches outside diameter, 0.25 inch thick, to the front end of the cylinder head. At the center of the cradle an overflow coupling is inserted in the expansion pipe. The filling valve is of forged steel No. 3, and is attached to the under side of the cylinder at its rear end, and has a filling valve plug of Tobin bronze. By means of a pipe run- ning from the under side of the filling valve to a funnel at the center of the cradle, the system may be filled. By means of a tee and cock, under the filling valve, the oil may be removed from the system. Hydroline oil is used in the recoil cylinder, and with this oil the service pressure in the cylinder is 1,974 pounds per square inch, giving a service pull on the piston of 460,205 pounds. The counter recoil is accomplished by the counter-recoil springs in the spring cylinders. There are four spring cylinders made of cast steel, each of which is strapped to the cradle by means of three straps of cast steel No. 2. The front end of each cylinder is closed by a spring cylinder head made of cast steel, with eight 0.875-inch drill holes for the escape of air. These holes are also utilized for a tit wrench by means of which the cylinder head is screwed in place. It is held in place by one small set screw. The rear spring cylinder head is similar to the front one, but in addition is provided with a hole for the spring rod. This hole is lined with a No. 2 bronze bushing. Each cylinder contains four triple-coil helical springs, made of spring steel, which are carried on the spring rod and sepa- rated by cast-steel separators bushed with bronze No. 4. The outer and inner springs are wound right hand, and the intermediate spring is wound left hand. The spring rod is of forged steel No. 3. At the front end is the spring-rod piston of bronze, screwed on the rod and held in place by the spring-rod nut. On the rear side of the piston are the bearing surfaces for the front ends of the front springs. On the rear end of the rod is screwed a band bushing of bronze No. 3, which fits in the recoil band, and is held in place by means of a band bushing nut, which is made of forged steel No. 3. On the inner side of the rear cylinder head are the bearing surfaces for the rear ends of the rear springs. Elevating System (Pis. X and XII). — The gun is elevated and depressed by means of a right-hand elevating screw connected to the gun by a steel strap and actuated by the elevating nut. The ele- vating nut is driven by bevel gears, the elevating-nut gear which is 9 keyed to the elevating nut, and the elevating-nut pinion keyed to the horizontal shaft. The horizontal shaft is driven by bevel gears, namely, the horizontal intermediate gear keyed to the shaft, and the vertical intermediate pinion. This pinion is actuated in three ways to be described later. The elevating nut and screw are supported in the elevating screw beam, which is held in bearings in the side frames. Ball bearings are provided at both the upper and lower ends of the nut. Elevation is provided for between 0° and 35°, and the elevating screw is projrided with stops at these Umits. Buffer cylinders are provided to ease the action of the stops. The buffer cylinders are supported^ in yokes, which are bolted to the elevating screw beam. Longitudinal grooves of varying depths are provided in the c^dinders to regulate the flow of oil by the pistons. Steel springs are provided to return the pistons and stuffing boxes and gaskets close the cylinders. The elevation is accomplished in three ways: 1 . Slow motion by handwheel. 2. Quick motion by elevating cranks. 3. By motor power. For using the quick motion by the elevating cranks, the operating lever is set at "In" on the clutch stop plate. By means of the upper and lower connecting rods and the quick-motion fork, the upper por- tion of the quick-motion clutch is pulled down against the strength of a spring and meshed with the lower portion. This is in turn meshed with the quick-motion upper bevel gear, which is bolted to the end of the quick-motion shaft, on the lower end of which is keyed the quick-motion lower bevel gear, which in turn is in mesh with the crank gear, which is keyed to the crank shaft. The crank itself is pinned on the shaft. The elevation is accomplished by turning the elevation cranks, the power being transmitted through the above- described chain of shafts and gears to the upper portion of the quick- motion clutch, which is keyed to the vertical shaft. This shaft is keyed inside of the control sleeve, which in turn is keyed to the hand clutch. The hand clutch is meshed with the vertical intermediate pinion, and from there the chain is as previously described. For slow motion the operating lever is set at "Out," which disen- gages the lower portion of the quick-motion clutch, and thus omits all that chain of shafts and gears going to the cranks, but leaves the remainder the same. The handwheel is connected to the vei'tical shaft by the handwheel shaft and the bevel handwheel gears. For operating by power, the control sleeve is raised by one of the power-clutch forks, operated by a treadle on the platform, so as to mesh with the control-gear clutch and release from mesh with the vertical intermediate pinion. At the same time the power clutch is 10 raised by the other power-clutch fork and meshed with the underside of the vertical intermediate pinion. The power clutch is keyed to the vertical power shaft, which is connected to the ^^B" end of the elevating motor shaft by the power pinion and power gear. The speed of elevation by power is controlled by a Waterbury Tool Co. hydraulic elevating speed gear, by means of which the rotation of the ''B " end of the shaft may be varied from to 800 revolutions per minute, while the speed of the '^A" end is constant with the motor itself at 800 revolutions per minute. The adjustment is made by the speed-gear control. After the power clutches are thrown in, if it is desired to elevate, the handwheel is turned in the proper direction to elevate and by a train of gears previously described motion is given to the control sleeve. This sleeve is now in mesh with the con- trol-gear clutch, which, by means of the indicator gear and shaft, sets the speed indicator. At the same time another gear on the control- gear clutch is meshed with a bevel gear on the throw-out shaft. This same bevel gear is meshed with the upper control pinion, bolted to the upper end of the upper control shaft. The lower end of this shaft is connected by the beveled control gears to the control mechanism of the hydraulic speed gear, which is thus set to give the speed and direction indicated on the speed indicator. To stop elevating by power, the gun pointer simply moves the elevating handwheel back so that the indicator reads 0. There is also an automatic mechanism to shut off when the limiting stops are reached. This is accomplished by means of the throw-out mechanism. Keyed to the horizontal shaft is a throw-out pinion, which is meshed through an idler to the throw-out gear. This gear turns freely on the throw-out shaft until either 0° or 35° elevation is reached, when the throw-out crank fitted on the throw-out shaft comes against the throw-out plunger, which is bolted to the gear. The shaft is then turned by the gear, and, being in mesh with the upper control pinion and the control-gear clutch, it thus brings the control back to zero and shuts off the power from the power shaft, and at the same time sets the speed indicator to zero through the chains of gears and shafts previously described. Traversing System (PI. XII). — The traversing mechanism con- sists of the traversing rack in 10 segments attached to the base ring by 80 steel traversing-rack screws, the traversing pinion of steel on a vertical forged-steel shaft, provided with bearings in the traversing bracket, and rotating with the carriage, geared to the steel crank shafts which extend across the carriage, by means of a traversing gear wheel and a crank pinion. The cranks are used for norn al traversing. Slow-motion traversing is provided for at the telescopic sight by means of a vertical slow-motion shaft, which is in two parts, bolted by a slow-motion shaft coupling. The slow-motion shaft is 11 geared to the handwlieel shaft by means of the slow-motion gear and the handwheel pinion. The lower end of the slow-motion shaft is geared to the worm shaft by the slow-motion pinion and the worm shaft gear. The worm shaft is connected to the traversing shaft by means of a worm, which engages in a worm wheel provided with a multiple disk friction drive. There are 10 friction disks, 5 steel disks keyed to the sleeve of the shaft, and 5 bronze disks keyed to the worm gear. A' clutch, operated by a treadle on the platform , throws the slow motion in or out. Cast-steel gear cases are provided for all gears. Azimuth Circle and Pointer. — ^The azimuth circle consists of a bronze ring in eight sections. The sections are of T cross section for rigidity. Each section is riveted to a steel support. These supports are grooved so that the eight sections when bolted together form a hollow cylinder surrounding the traversing rollers and thus serving also as a dust guard. The outside of each support is stiffened by means of two stiffeners, which are steel angles, and are riveted to the supports. The sections are accurately bolted together by means of steel straps. The supports are bolted to the "base ring by means of bases permanently bolted to the outside of the base ring. These bases are all steel angles. The circle is graduated in degrees, but not numbered until the carriage is in its emplacement. A pomter case of cast steel is placed in the recess of the racer, which exposes the top of the circle; the pointer body is placed in the case and graduated and numbered as a subscale, to read to ten-hundredths of a degree, and by means of a graduated thumb screw a reading of one-hundredth of a degree can be obtained. The pointer is designed to pennit final adjustment by means of set screws on the degree marks of the circle at the time the circle is numbered. The index is of German silver and is carried in a bronze slide. A cast-steel lid is provided for the case. Sight. — The sight with which this carriage is equipped is the 3-inch telescopic sight, model 1912, which, together with its bracket, is de- scribed in Ordnance Pamphlet No. 1959. The bracket is mounted on the upper end of the sight standard. Range Disk and Pointer. — ^The range disk with its pointer is attached to the left side frame within convenient view of the man at the elevating handwheel by means of a range disk fulcrum screwed into the side frame. The disk itself is of cast steel, to which is screwed a German-silver range scale. The disk is riveted to a range disk gear, which is actuated by the range disk rack attached to the side of the cradle. The backlash is taken up by means of a disk weight of cast iron weighing about 100 pounds, suspended by a disk rope of amiealed galvanized sash cord, which is wound on the idler sheave attached to the disk by means of the idler sheave pin. 12 On the range scale there are three scales. The middle or reference scale is graduated for every 5° elevation. The outer or surface scale and the inner or subcaliber scale are graduated for every 20 yards. The elevation pointer is contained in a worm housing of cast steel, and is so arranged that it can be adjusted for calibration. Lighting Apparatus. — The current for both lighting and power enters the pit at a terminal box in the side of the emplacement and is brought into the carriage by means of a 360° contact, and thence distributed by conduits to the points at which it is utilized. The 360° contact consists of a pedestal in the pit, carrying copper rmgs supported on an insulating plate; brushes bearing on these rings pro- vide the contact. The brushes are carried in a cap and turned about by arms bolted to the racer, and the cables are connected through stuffing tubes to the brushes. The sight, speed indicator, range scale, and azimuth pointer are illuminated by 2-candlepower lamps. Four 16-candlepower lamps controlled by 5-ampere water-tight switches are provided for general illumination on the upper and lower side frames. Two 16-candle- power portable lamps are also provided and arranged with plug boxes on each side frame. Firing Mechanism. — Electric firing is provided for by a firing magneto, Type G. A., described in Ordnance Pamphlet No. 1814. It is operated by the gun pointer. The firing cable is carried over the top of the cradle back to the breech of the gun, a loop being provided to allow for recoil. Shot Tongs. — The shot tongs are of the Gilmartin type for 12-inch projectiles. Grease Cups and Oil Holes. — ^AU axles, trunnions, and sliding bearing surfaces are provided with oil holes, there being 54 in all. Each is closed with a screw oil plug. The principal bearings also have grease cups, these being 16 for the cradle and one for each cradle trunnion bearing. Spring Compressor. — The spring compressor consists of a screw, nut, and crank in a frame, which is adjusted to the recoil band. The operation is described on drawing 10-15-86. Plate XIII.) instructions for assembling the carriage. In assembling the carriage, no part should be directly struck with a steel hammer or sledge. A wooden buffer should be interposed, or soft metal drifts or hammers should be used. Care should be exer- cised to prevent the burring of machined surfaces. All bearing sur- faces should be clean, smooth, and well lubricated, prior to assembly. In assembling the carriage, such blocking, way-planks, hydraulic jacks, ropes and blocks and tackle as are found at Coast Artillery 13 forts are required. Also a derrick or shears capable of lifting 4 or 5 tons will be very useful. The following instructions are general only and are intended as a guide for the order of assembly. The work should be under the immediate supervision of an Ordnance machinist. The following description refers, particularly, to the order in which the parts should be put together: Place the two halves of the base ring (9G3 and 9H3) over the plat- form by means of skids and rollers, keeping the half marked '^ Front" to the front of the battery. Carefully remove all biirrs from the finished faces, keys, and bolts, oil the faces that come together, and assemble the base ring halves, with bolts (9A), (9B), (9C), and (9D). The six bolts (9A) should be inserted in one-half of the base ring before the two halves are brought together, as it is impossible to get them in otherwise. The tapped holes for leveling screws (9K) should be thoroughly cleaned and the screws oiled and put in place. The base ring should now be lowered down in place, preparatory to leveling, using the thrust plates (lOH) to support the points of the leveling screws. The leveling of the base ring is now conducted in a manner similar to that prescribed in other Ordnance Pamphlets, and when the level- ing is completed, grouting is done as usual. After leveling the base ring, the wrench hole covers (lOF) should be put on the openings in the inner vertical surface of the base ring with the tap bolts (lOG). The sections of the distance ring (lOA) should be assembled over the roller path of the base ring with the bolts (lOB) and (IOC). The traversing rollers (lOK) with beamings (lOD) should now be as- sembled to the distance ring with the bearing tap bolts (lOE). When assembled, care should be taken to see that all burrs are removed from the finished surfaces and the lower roller path. The distance ring with roller system should be turned by hand on the roller path to see that it works properly. The two halves of the racer (11B2) and 11C2) should now be brought over the base ring and assembled together with bolts (llD) and the racer joint bolts (11 A). The joint bolts (11 A) should be inserted in one-half of the racer before bringing the two halves together. After assembling, the racer should be lowered on the* roller system, and turned by hand to see that it turns freely. Before lowering the racer in place all oil tubes and holes should be cleaned out and burrs removed from the roller path. As soon as possible, after turning the racer the roller covers {12 hy 1) azimuth circle in eight sec- tions and the azimuth pointer case should he put on to prevent sand and grit from getting into the roller system. 14 The front clip (22F) and the rear dip (22H) can be now assembled on the racer with the tap bolts (22G). Place the side frame right (19B1) and the side frame left (20A1) in their positions on the racer and locate accurately in position by the dowel pins (2 IP). The keys (2 IS) should be put in place and the right side frame secured to the racer by the tap bolts (19C). The left side frame is secured similarly by the tap bolts (20B). The rear bracket (14E) can now be assembled to the side frames by the bolts (14F) and the rear bracket studs (19A). The recoil cylinder (29D1) with the cyhnder head (30Kl) and the piston rod (30B1) should be assembled to the cradle and secured by the recoil cylinder strap (27F). Then the cradle should be assembled in place in the side frames. The elevating screw beam (55A1) and the traversing bracket (68A) should now be placed in position. The front transom (22A1) can be put in place, secured to the side frames, by the bolts (22B) and (22C) and to the racer by the tap bolts (22D) and (22E). After the transom is in place, the working platform should be assembled to the carriage to provide a working floor when assembling the spring system. The spring cylinders (35 A2) are secured to the cradle by the spring cylinder straps (27G) and (27H) and the spring tap bolts (27E) can now be assembled in place. The spring cylinder head (35B1) should be removed from the spring cylinder and the interior of the cylinder should be slushed. The gun is then mounted. The spring system can now be assembled, using the spring com- pressor provided for that purpose and following the method of procedure shown on Plate XIII. The gearing should now be assembled to the carriage and all adjustments made. The method of adjusting the elevating gear mechanism is described on Plate X. IMPORTANT POINTS. 1. The gun should be elevated and depressed to extreme limits to see that all points function freely. 2. The carriage should be traversed through 360° to see that the traversing mechanism moves freely. 3. See that all oil holes are clean and provided with plugs. 4. See that the recoil cylinder contains the proper amount of oil. 5. See that the stuffing box is tight. 15 CARE OF THE MOUNT. General Instructions. — The carriage should not he allowed to remain in the same 'position for a long time, d.nd from, time to time should he completely traversed afid the gun elevated and depressed to limits. All parts of the carriage should be kept free from rust at all times. It is forbidden to use sandpaper on any bearings, piston rods, etc. Emery cloth No. 1 is coarse enough to remove any rust if pre- viously softened with kerosene. Any leakage in the hydraulic recoil system should he immediately repaired. Filling and Cleaning Recoil Cylinder. — The recoil cylinder is filled by means of the funnel and pipe previously described under the description of the recoil system. The gun should be at zero degrees elevation when the cylinder is filled, and the cylinder should be fiUed f uU. To clean the recoil cylinder, drain the cylinder, loosen the stufiing box, and remove the front cylinder head and the rear piston rod nut, and take out the piston. Clean all parts thoroughly and reassemble. Cleaning Cradle. — To clean the cradle and sliding surface of the gun, dismantle the spring cylinders by reversing the process of assembly as described on Plate XIII; set the gun at zero degrees elevation and push it back to extreme recoil, by means of blocking and a hydraulic jack. Clean and lubricate all parts thoroughly and return gun to normal position by use of jack. Reassemble the spring cylinders. List of weights. Name of part. Number of pieces. Weight in pounds. Leveling screws and plates . Base ring Azimuth circle ^Distance ring Traversing rollers Racer Clips, Side frames , Front transom Rear bracket Working platform (complete) . Cradle Recoil cylinder Piston rod (complete) ; . . , Spring cylinders , Counter recoil springs Spring cylinder rods 24 2 halves lin 8 sections. 1 in 6 sections . 24 2 halves /Front \Rear 2 Elevating screw Elevating screw beam Elevating gear (complete) Traversing gear (complete) Speed gear Bolts, nuts, and rivets (complete). Electrical equipment (complete) . . 8 springs rods with pistons, separators, and band bushings. Set. 324 58,800 3,100 6,050 6,792 66,400 3,060 1,685 46,480 8,825 4,400 7.590 39,160 4,610 2,7«5 8,080 14,020 6,365 910 1,820 2,310 3,628 210 3.630 16 List of articles packed in armament chest for 12-inch gun, model of 1895 Ml, on 12-inch barbette carriage, model of 1917. FOR GUN. 1 box containing firing mechanism, cleaning brushes, and reamer for primer seat. 3 brushes, cleaning, for primer seat. 1 cloth, emery, 1 quire, No. 00. 1 drift, bronze. 1 drift, bronze. 1 file, fiat, dead smooth, 8-inch. 1 file, round, second cut, 8-inch. 1 file, half-round, smooth, 8-inch. 1 file, three-cornered, 8-inch. '^ 3 files, pillar No. 6, 6-inch. 3 files, three-cornered, No. 4, 6-inch. 3 files, half-round, smooth, 8-inch. 3 files, round, smooth, 8-inch. 1 gunner's drill. 1 gunner's lanyard. 1 gunner's pouch. 1 gunner's punch. 1 gunner's sleeves, pair. 1 hammer, copper. 1 hammer, machinists' ball peen, 2 pounds — commercial. 1 hand mallet. 1 mallet, long handle. 1 metal scraper. 1 obturator nut clamp screw wrench. 1 obturator nut wrench. 1 pin punch. 1 pliers, cutting, 7-inch, pair. 10 pounds waste, cotton. 2 pounds wire, copper, No. 12. 2 pounds wire, copper, No. 16. 1 pressure plug wrench. 1 reamer, cleaning, for primer seat. 1 screw driver — commercial. 3 sponges, wagon. ' 1 tit wrench for obturator spindle. 4 twine, balls, assorted. 1 wrench, monkey. 1 wrench, monkey. FOR CARRIAGE. 1 file card, commercial. 2 oilers, half pint. 1 oiler, locomotive, 1 quart. 1 pin wrench, for elevating screw collar. 1 roller lift hook. 1 scraper, 24-inch. 1 screw driver. 1 screw driver. 1 socket wrench, for distance ring bearing. 1 socket wrench, for recoil cylinder head. 1 spanner wrench, for nut buffer. 17 1 spanner, for elevating pin nut. 1 spanner wrench, for friction adjusting nuts, worm bearing, and spring rod. 1 spanner wrench, for piston rod. 1 spanner wrench, for spring cylinder head, (elevating nut collar, and recoil cylinder stuffing box. 1 wrench, double, for 0.5 and 0.625 nuts. 1 wrench, double, for 0.75 and 1 nuts. 1 wrench, double, for 1.25 and 1.5 nuts. 1 wrench, double, for 2 and 2.5 nuts. NAMES OF PARTS OF 12-INCH BARBETTE CARRIAGE, MODEL OF 1917, THEIR LOCATION, PIECE-MARKS, AND MATERIAL OF WHICH THEY ARE MADE. [The parts are listed alphabetically under the following headings: Carriage proper; Azimuth pointe r; Shot tongs; Spring compressor; Filling device and grease cups.] MEANING OF ABBREVIATIONS IN COLUMN OF MATERIAL. Ann. C Annealed copper. Br Brass. Bz Bronze. C .♦ Copper. C.I Cast iron. C. S Cast steel. F. S Forged steel. Fl. S Flange steel. G.I Galvanized iron. G. W. H. P Garlock waterproof draulic packing. G. S German silver. hy- Lea T eather. R Rubber. S Steel. Sh. Bz Sheet bronze. Sp. Plios. Bz Spring phosphor bronze. Sp. S Spring steel . S . R Soft rubber. Tobin Bz Tobin bronze. T. S Tool steel. V. F Vulcanized fiber. W. I Wrought iron. CARRIAGE PROPER— 12-INCH BARBETTE CARRIAGE, MODEL OF 1917. Piece mark. No. Name of part. Location. Material. Remarks. 65L 308 13G 56Q 56P 56R 85B 85A 85C 36C-36D 36F 9G3-9H3 9A 50K lOD 27A1 27B1 57D 55D lOE 21 D 45N 45R 48K 50 R oOC oOG 50H SOL 51 K I Adjusting nut, trav- I ersing. ] Adjusting plug Angle and bracket I connections. I Balls, Hess Bright, i or equal. i Ball races, irmer I Ball races, outer Ball-thrust bearing. .. ! do Ball-thrust bearings. Band bushings , 4 Band-bushing nuts. 1 Base ring Base ring, joint bolt. Bearing 48 Bearings 1 Hearing liner 7 Bearing liners 1 Bearing ring 11 Bearing-ring studs. 96 Bearing tap bolts. . 4 ; Bolts 3 ! do .do. .do. .do. .do. .do. .do. .do. .do. On sleeve . F. S. In recoil cylinder head Side angle to rear bracket . . . F. S. S.... T. B". B". For ball race, inner and outer. On elevating nut T. S. do T.S.' For traversing shaft For slow-motion shaft, upper For worm shaft On spring rod end, rear, at Bz. No. 3... recoil band. On band bushings ' F. S. No. 3. On concrete platform C.S. No. 2. At joint on base ring Supporting power pinion (52Q). For traversing rollers In cradle ....do On elevating screw beam — In elevating screw beam (55A1). For traversing roller bearings For trunnion caps (21 B-21L ). S For quick-motion bracket. . . j S For bracket cover (45P) i S For control cam (48H) | S For speed-gear bracket (50A) | S ....do I S For motor bracket (50F) S ....do S For bearing (50K) | S For throw-out-gear support..] S S Bz.No.4.. Bz.No.3.. Tobin bz . Tobin bz. . F.S.No.3. S Commercial. Do. Do. 2-36 J, 2-36D. Front half, 9G3; rear half, 9H3. On distance ring. Do. 6594—17- 18 CARRIAGE PROPER— 12-INCH BARBETTE CARRIAGE, MODEL OF 1917— Continued. Piece mark. No. Name of part . i Location. Material. Remarks. 51 N 6 4 2 2 2 4 6 5 6 8 2 2 8 12 24 4 28 2 4 4 4 4 2 1 1 2 1 2 12 12 4 4 68 8 36 8 4 6 4 18 24 36 4 6 18 18 2 2 4 4 6 4 4 2 2 i 3 2 2 2 4 2 4 4 5 2 2 1 2 2 6 8 Bolts For throw-out housing For straps (55K) S 551. do S en 3 . do F'-r lower control - shaft brae", et. For slow-motion case do S 671) do -. ..do .... S 67E S. 67S do For slow-motion bracket For lower gear case S 67K do S 68D do S 71C do For traversing crank-shaft bracket. For rear bracket (14E ) At joint on base ring S 14F Bolts, with crown nuts Bolts, with nuts do .. ..do s * 9B s.... 9C s 9D s s lOB do do At joints on distance ring. . . do IOC s s 13U .. . do For front plate (13S) 22B do s 22C do do s. . 43C do do ..do . . . i^or hand wheel bracket case. For control bracket (48D)... For cap ( 48A) s 48E s... 48B s 53C 53D do .. .do For elevating bracket (53A1). do s s 53D Belt, with nut do For elevating-bracket cover (upper) (53E). . .do s 53 G s o3H Bolts, with nuts Bolt, with nut Bolts, with nuts do Bolts, tap :::::do:::::::::::::::: do do do s. 53 K . ..do s 53 L do s IID s lOG For wrench-hole cover For wrench-hole cover, rear. . For wrench-hole cover, front . For elliptical hole cover For strap (12Z) s 12C s 12F s 12H s 12AA s 13D do Side plates to side angle For angle and bracket con- nection (13H). For front plate (13S) For front brackets (14A- liB^. do s 13H do g 13W .....do do do do do do do s 14C s 14D s 14 K 14D For column bracket (14H) . . . do s s 14N For column (14M) s 15M s 15R do For ladder at rear of carriaee . For side frame, right (19Bf).. For side frame, left (20A; For left elevation cap ( 21G ) . . For right elevation cap (21 K) s 19C do s 20B do do s 2111 s s 21L do 22D do .. ..do s 22E do s 22G do For front clip s 22G do For rear clip s 33R do do do Expans^ion chamber to cradle. For overflow coupling For pipe clamp (33H) For pipe hook (33M) For bracket cover (45P) For clutch stop plate (46S) . . . For cap (4S A.) s 331' s 33 K s 33M do... do s 45Q s 46T . . do s 48C do . .. s 52L do For clutch fork bracket For fulcrum bearing (52F)... For elevating bracket (53 .\1) For elevating bracket cover (upper) (53E). For elevating bracket cover (lower) (53N). For cover supports (54N1) and (54P1). s 52G 53B dc dc s s 53M do.. s 53r do s 54Q 58D do s .. ..do s 59D do On elevating pointer bracket 1 For worm housing s 59 F do do do do do do s 65M 6fiK 1 For adjusting nut, trav ! For fork shaft bearing For slow-motion bracket cap. s............ 67 B s . . 67P s 68B i For traversing bracket s 19 CARRIAGE PROPER— 12-INCH BARBETTE CARRIAGE, MODEL OF 1917— Continued. Piece mark. 68F A66F A66G 66L 15E-15F 15G-15H 45P 57A 57G 57F 57P 57M 55B 29A 35D 44G 67F 67G 21N 21F 48A 21R A66IT 30E 22L 66 B 52K 66C 46R 46P 46S 68M 64B 64C 64E 64F 64K 65 B 66D 66E 67L 33A 44D 55F 68L 67M 14M 14H 13E-13F 13N-13P 13^ 46E 46D 48D 48H 48P1 48L 60K2 No. Name of part. Bolts, tap do do-... Bolts, countersunk head. Braces .• Brace angles Bracket cover , Buffer cylinder Buffer cylinder head. Buffer piston Buffer spring Buffer yoke. .' Buffer yoke studs 1 Bushing. 1 i do 4 I do 1 do 1 ! do 1 ' do 20 Bushing screws. 20 I Bushing screws (large) 1 Cap 2 I Cap eyebolts 2 Clamps 2 Clamp screws 2 Clip eyeholts 1 ' Chitchfork 1 Clutch-fork bracket. . . 1 Clutch-fork shaft. Clutch spring Clutch-spring collar. Clutch stop plate . . . Collar (large) . do Collar (small). Collar (large) . Collar (small). Collars Collar Collar (large) . Collar (small). 1 I do 6 Collars 1 ! Collar 3 I Collar screws . Collar set screw (large) Collar set screw Columns Column brackets Connection angle to side frame. Connection angles to side plate. Connection angle to transom. Connecting rod (lower) Connecting rod(upper) Control bracket Control cam Control Control gear clutch . Control gear pinion. Location. For handhole cover For shoulder rest ....do For fulcrum bearing For auxiliary platform do For quick-motion bracket. . . In buffer yoke In buffer cylinder ....do...; .do. On elevating screw beam For buffer yoke to elevating screw beam. For shaft bearing in side frame (left 20A) near speed indicator. In recoil cylinder In spring cylinder head (rear) In horizontal intermediate pinion (44H). In slow-motion case do For elevating cap bushings (21M). For trunnion bushings(21 E ) . For control bracket (48D).., For trunnion caps 21 B and 21C. For shoulder rest In rear piston-rod nut For front and rear clips For traversing clutch Attached to lower part of elevating bracket. Through side frame (left) to traversing bracket. On vertical shaft lower above quick-motion clutch. On vertical shaft lower above clutch spring. On side frame for operating lever (46Q). On traversing shaft For traversing shaft do For handwheel shaft ....do For crank shaft For worm shaft For clutch fork shaft ....do On slow-motion shaft (lower) On ends of expansion pipes. For vertical .shaft (lower)... For screw collar (upper) (55G) and screw collar (lower) (55H). For collar (large) In collar Supporting platform From column (14M) sup- porting platform. On inner edge of side plate. For front plate (13S). ....do On le't side of carriage for elevating Q. M. shipper. do On side frame (left) On upper control shaft at elevating bracket. In control bracket at junc- tion of control shafts. On ertical shaft (lower). . . Near hydraulic elevating speed gear. Material. S s s s s s c s f'. s". No.'i" Bz. No. 3... F. S. No. 3.. Sp.S C. S. No. 3.. S Bz Bz. No. 4. . . Bz. No. 2... Bz. No. 3... Bz. No. 3... Bz. No. 3... TobinBz... TobinBz... Bz. No. 3.... S c.s s s c.s. No. 2.. C.S s Sp. Phos. Bz, F.S.No.3.. Bz. No. 3... Bz Bz Bz S S S Bz Bz Bz Bz F. S S F.S S S C.S.No.3... C.S s s s s s Bz.No.3.... F.S.No.3... F.S.No.3... F.S.No.3... F.S.No.3... Remarks. For traversing case. 0.25 by 0.25 by 0.5 angle. Right (13N), left (13P). 20 CAERIAGE PROPER— 12-INCH BARBETTE CARRIAGE, MODEL OF 1917— Continued. Piece mark. No. - 48F 1 60F 52A1 52B1 15K 36E 36B 36A A66DA 33F 46N 52N1 50M 50E SOD 12T ^12U 12W 67N 12K 54N1\ 54P1/ 2601 A66EA 45C1 64L2 64H1 45B1 57K 30M1 29B 35E 26A H23W 77N 58M 58N lOA 21P 9F A66A 53A1 60A 60B 60C 1 53E 53N 77B 21T 21U H23Z Name of part. Location. MateriaL Remarks. Control lock Control shaft bushing Control sleeve Control sleeve clutch. Corner clips Counter recoil springs (inner). Counter recoil springs (intermediate). Counter recoil springs (outer). Couplings Coupling do do Coupling disk Coupling, motor end. . Coupling, speed-gear end. Cover handles Cover-handle fasten- Cover-handle plates . . Cover plate Cover screws Cover support Cradle Crank fastening Crank gear Crank pinions Crank shafts. Crankshaft Cylinder caps Cylinder-head bush- ing. Cylinder-head studs . . Cylinder-head screws. Cylinder-strap studs. . Depressing direction plate. Direction plates Disk rope Disk weight Distance ring Dowel pins Dowel pin Dowel pins Drainpipes Drain plug Elevating bracket — Elevating bracket bushing (upper;. Elevating bracket bushing (intermedi- ate). Elevating bracket bushing (lower). Elevating bracket cover (upper). Elevating bracket cover (lower). Elevating crank Elevating crank hook (lower). Elevating crank hook (upper). Elevating direction plate. Running in control cam F. S.No.3.. speed control details. j In elevating bracket On vertical shaft (lower) On control sleeve For auxiliary platform In spring cylinders (35A1) . . Bz.No.3.. Bz.No.3.. F.S.No.3. .do. -do. For expansion pipes, upper and lower. On ends of expansion pipes . . Coupling connecting rods, upper and lower together. On lower end of vertical power shaft (52H1). Betweencouplings on motor shaft and hydraulic speed- gear shaft. On motor shaft On hydraulic speed-gear I shaft. One over-handle plate ( 12W ) do Sp.S. Sp.S. Sp.S. F.S.. F.S. F.S. F.S.No.3. Bz.No.4.. C.S.No.3. C.S.No.3. To roller cover ( 12X1) For lower gear case For roller cover to racer Attached to elevating bracketsupporting throw- out-gear cover. On trunnions between side frames. For cranks For crank shaft (45B1) On crank shafts In side frames For elevating quick motion. . On buffer cylinder In recoil cylinder head F.S. S.... S... C.S. S.... Cylinder head to recoil cy- linder. Attaching cylinder heads to spring cylinder. In cradle for cylinder straps. . On elevating hand wheel On side frames On range-disk gear On disk rope Between racer and base ring, supported by traveling rollers. For side frames In recoil cylinder For slow-motion bracket — In base ring under roller path. In overflowing coupling On side frame, left In elevating bracket .do. .do. For elevating bracket (53A1) do On crank shaft For hanging elevating crank on side frame. do On elevating handwheel. Fl.S. S..., 0.25 thick. 0.375 thick. Right (54N1), left (54P1). Bz.No.4.. F.S.No.3. F.S F.S....'.-. Bz.No.3.. Bz.No.4.. F.S.No.3. Complete. S.. Bz. Bz.. G.I. C.I- C.S. Sash cord. In six sections. W.I. F.S C.S : Bz. No. 3. Bz. No. 3. Bz. No. 3. C.S C.S In two parts. In halves. Do. Do. F.S. S.... 21 CARRIAGE PROPER— 12-INCH BARBETTE CARRIAGE, MODEL OF 1917— Continued. Piece mark. 77A1 .■iGA 57C1 56S 56T 44L1 55C 55M 55E1 55 A 1 56N 21M 59H 59C 59A 12G 33Q 33S 33D 33E 33C1 A66D 34C 30P 33a 57N 52D 76M 66H 6oQ 13M 14A-14B 22F • 30H 13S 22A1 52F 66G 12BA 30T 30L1 33T 33B 34 D 34E STB 57L 65E 56W 57E 67Q 52P1 68E 46L 46H A69P 43D 43A 43B No. I Name of part. Elevating handwheel Elevating nut , Elevating nut collar. , Elevating nut cover . . Elevating nut gear.... Elevating nut pinion. Elevating pin Elevating pin nuts. . Elevating screw Elevating screw beam Elevating screw wiper Elevation cap bush- ings. Elevation pointer Elevation pointer bracket. Elevation pointer worm. Elliptical hole covers. . Expansion chamber. Expansion chamber head. Expansion pipe (up- per). Expansion pipe (in- termediate). Expansion pipe (lower). Filling valve cap Filling valve plug Follower ....do ....do Fork connecting rod . Fork end Fork shaft bearing. Friction spring Front angle Front brackets . Front clip Front piston rod nut Front plate Front transom... Fulcrum bearing . do... Gasl^ets. do... do... do... ....do do do do do do Gear disk Gear set screws . Glands Half bushings . . Hand clutch Handhole cover Handle Handle spring Handwheel Handwheel bracket... Handwheel bracket bolts. Handwheel bracket Location. On handwheel shaft In elevating screw beam. On elevating nut do ....do In elevating nut on end of horizontal shaft. Between straps (55K) On outside of straps on ele- vating screw. Through elevating screw beam (55A1). Between side frames in bear- ings. In top of elevating nut For elevating screw beam bearing. On elevation pointer bracket On side frame, left In worm housing On inside of racer On top of cradle On end of expansion cham- ber. From expansion chamber to overflow coupling. From overflow coupling to expansion pipe (lower). From expansion pipe inter- mediate to recoil cylinder. On valve body In valve body (34B) On rear end of recoil cylinder On ends of expansion pipes. . In buffer cylinder heads Power shipper from plat- form. On reach rods On side frame (left) For sleeve Under outer edges of front and side plates. On front of carriage sup- porting platform plate. On racer engaging under lip on base ring. On piston rod near gim lug. . For platform on front of carriage. At front of carriage between side frames. On under side of platform flange on side frame (left) Under side plate (left) Under roller cover (12 x 1) . . For adjusting plug (308) Under recoil cylinder head . . Under expansion chamber head. On ends of expansion pipes. . For valve body (34 B ) do For buffer cylinder For cylinder cap For hand hole cover For worm gear For elevating nut gear In buffer cylinder head For slow motion bracket In control sleeve over verti- cal power shaft. For traversing case On operating lever (46Q) For handle (46L) On handwheel shaft Attached to side frame (left). Handwheel bracket case to side frame, left. Attached to side frame, left. . Material. C.S Bz. No. 4.... F. S. No. 3.. Sh. Bz F. S. No.3.. Bz. No. 3.... T. S. "B".. Bz. No. 3.... F. S. No. 3.. C. S. No.3.. Bz. No. 4.... Bz. No. 4.... Bz. No. 4.... C.S. No. 3.. F. S. No.3.. S C.S Remarks. Seamless S. tubing. Seamless S. tubing. Seamless S. tubing. Bz TobinBz.. Bz. No. 2... F. S F. S. No. 3. S C.S. No. 2. Bz Sp. S s C.S C.S. No.3. F. S. No. 3. S C.S. No. 3. C.S. No. 2. C.S. No. 2. R Ann. C Ann. C V.F V.F C S c c R Bz. No. 4... S Bz. No. 3... Bz F. S. No.3. Fl.S , Bz Sp.Phos.Bz Bz C.S. No. 3. S C.S. No. 3.. 0.25 thick. 22 CARRIAGE PROPER— 12-INCH BARBETTE CARRIAGE, MODEL OF 1917— Continued. Piece mark. 44P1 64 G 64D1 44M 44F1 44E1 51D1 60N1 60P1 58K 58L 51F 54F 54C 54D 54G 54A 54B 54K 60D 60E 54L 21 S 27K A65A 15P-15Q 15N 21G 46F 9K 12A 27D 27C 60H 48N1 60L2 67H 50F 44C 26B 29C No. Name of part. Hand wheel gear Handwheel pinion Handwheel shaft do Horizontal interme- diate gear. Horizontal shaft Idler. Idler bracket Idler bracket bolts Idler sheave Idler sheave pin Idler fulcrum Indicator. Indicator collar, do. Indicator pointer Indicator shaft (up- per). Indicator shaft (lower) Indicator shaft (inter- mediate). Indicator shaft bush- mg (lower). Indicator shaft bush- ing (upper). Indicator shaft coup- lings. Keys.. do. ....do. ....do ....do ....do -...do ....do ....do ....do ....do ....do Keyway filling piece . Knob Ladder sides Ladder steps Left elevation cap . Lever fulcrum pin. Leveling screw. Liner Line screws Locking screws Lower control bracket Lower control shaft. . . Lower control shaft pinion. Lower gear case Motor bracket Nut do Location. On upper end of vertical shaft upper. On handwheel shaft In slow-motion bracket In handwheel bracket case (43B). On horizontal shaft engaging with vertical intermediate pinion (44H). On elevating slow- motion S3'stem. Between throw-out gear and throw-out pinion. On elevating bracket For idler bracket On idler sheave pin In side frame, left In idler bracket (60N1) sup- porting idler. On top of indicator shaft (upper). On top of indicator (54F) Under indicator gear (54E ) . . On boss on side frame under indicator. Through bearing in left side frame. To indicator gear in elevat- ing bracket. Between indicator shafts upper and lower. In elevating bracket do Coupling indicator shafts, upper and lower to indi- cator shaft intermediate. For side frames For spring cylinder For vertical shafts upper and lower. For horizontal shaft (44E1),. For crank shaft For quick-motion shaft For vertical power shaft For hand clutch For indicator shaft interme- diate. For indicator shaft (upper) . . For indicator shaft (lower). . . For elevating nut gear For spring cylinderstrap For handle For ladder at rear of carriage . For ladder at rear of carriage . For elevating screw beam bearing. In side frame for operating lever. In base ring On racer For bearing liners in cradle. . . For strap tap bolts (27E) On speed gear bracket From control bracket to hy- draulic speed gear. On lower control shaft On side frame (left) To bottom of side frame, left. For vertical shaft (upper) For bearing ring stud (o5D) . . For bolts For shoulder rest For roller pins For rear bracket stud (19A) . . For cylinder strap stud For cvlinder head stud (29B) Material. Remarks. F.S. No. 3.. F.S. No. 3.. F. S. No. 1.. F.S.No.3.. Bz.No.3... F. S.No. 1.. F.S. No. 3.. Bz.No.3.... S CI F.S. No. 3.. Bz. No. 4... Bz S Without keyway. With keyway. S Bz F.S F.S F.S Bz.No.3... Bz.No.3... F.S F.S S s 0.437 by 0.312. 0.437 square. 0.5 square. 0.437 square. 0.437 square. 0.437 by 0.312. 0.25 square. 0.25 square. 0.25 square. 0.5 by 1. s s s s s s s s s Bz Bz For handwheel. s Right (15P), Left (l.-^Q). s C.S.No.2... F.S. No. 3... S Washer head. Bz Tobin Bz... Tobin Bz... Bz.No.3.... F.S. No.3.. venient. Bz.No.3.... C.S C. S.No. 3... F.S. Special. S S - ing. S s s s . Special. Do. s 23 CARRIAGE PROPER— 12-INCH BARBETTE CARRIAGE, MODEL OF 1917— Continued . Piece mark. 44N 21Q A66M 12K 12P 12Q 12R 12S 46Q 33N 30R 57H No. Name of part . Location. Material. Nut, crown. . Nuts, crown. ....do do Nut, crown.. Nuts, crown. Nut, crown.. Nuts, crown. do do do do : do Nut, crown.. -do. Nuts, crown. do Nut, crown.. Nuts, crown. Nut, crown.. Nuts, crown. Nut, crown.. Nuts, crown. Nut, crown.. do Nuts, crown. Nuts, special... Nuts, standard. do , Nut strips Oil-hole screws. Oil pipes For handwheel shaft (44M) . . For quick motion shaft (45E) For bolts (45N) For bolts (45R) For lever fulcrum pin Foi' upper control shaft For lower control shaft For bolts (48K) For bolts (50B) For bolts (50C) For bolts (50G) For bolts (SOL) Forbolts(51N) For indicator shaft (upper) (54A). For indicator shaft (lower) (54B). For buffer yoke stud (55B).. For bolts (55L) For elevation pointer worm. . On buffer piston For range disk fulcrum For traversing shaft For handwheel shaft For crank shaft For slow - motion shaft (lower). For worm shaft For traversing crank shaft bracket. Epr dowel pin (21P) For base rine joint bolt (9A) . For racer joint bolt (llA) — For shoulder rest For oil holes in racer In racer S... Bz. .do. .do. .do. Oil plugs. do .....do.... do... Oil plug.. Oil plugs. Oil plug.. ....do... Oil plugs. do... Oil plug.. do... -...do... Oil plugs . Oil plug . . Oil plugs . ....do... Oil plug. do... ....do... do... Oil plugs . Oil plug., Oil plugs. do Operating lever Overflow coupling. Packing rings .do. Pins. do do ! In elevating bracket cover (upper) (53E). In racer . Side frame, ri-rht (19B1) ■ ' Side frame, left (20A) For trunnion caps 21B and 21C. For right elevation cap (21 K) . For handwheel bracket case. . For handwheel bracket . For quick motion bracket — . For bracket oover (45 P) . Forcap(48A) • For bearinc (oOK) . Forthro\^ou gear(51El) . For idler talerum (51F) . For elevating bracket cover I (upper) (53E). ■ i For elevating bracket cover (lower) (5.3N). For elevating s:rew beam (ooAl). On elevating nut On traversing gear For slow motion bracket cap. For lower gear case For collar f small) For traversing case For collar (large) For traversing crank shaft bracket. For spring stirrups Bz At top end of connecting rodi C (upper), Q. M. shipper de tails. To pipe on side of cradle i Bz. No. 2 At rear end of recoil cylinder. I G. W. H. P . For buffer cylinder head i G. W. H. P For cylinder strap studs j S For cylinder head bushing. . . Bz. No. 4 For "control sleeve clutch! Bz (52B). i Br. Remarks. Special. With split pins. Seamless tube. Do. Do. Do. drawn 24 CARRIAGE PROPER— 12-INCH BARBETTE CARRIAGE, MODEL OF 1917— Continued . Piece mark. No. Name of part. Location. Material. Remarks. 46U 46G 68N 76G 76H 76N 64 Ml 33H 33L •30A 30B1 13R 9E 46M 56M 56L 52C1 52M 52R 52Q1 45M 45H 46 A 1 46B 45G1 45E1 45F1 llBl- llCl llA oSBl 58E1 58A1 58 1 58G1 76K 76L 14E 19A 22H 30G 29D 30K1 27F 21 K 66F 52E 76D 85Q 85S 85F 85H 85 A Pins For hand clutch (52P) do For zero strip (59G). do For worm do For zero strips (59K). do I For elevating bracket bush- ings. Pin (type A) For quick-motion fork do For connecting rod, lower. . . Pins (type A) For power clutch fork Pin (type A) For rod end (52E) .do For worm bearing lock Pins (type A) For treadle bars .do do .do For fork ends Pinion collars On crank shafts Pipe clamps For attaching expansion pipes. Pipe hook do Pipe plugs For expansion chamber 33Q. Piston On piston rod Piston rod In recoil cylinder Plate reinforce For front plate (13S) Plugs In outer flange on base ring . . For handle (46L) On plunger stud In elevating nut On vertical" power shaft Operattag power clutch and attached to clutch fork bracket. For " B " end of speed gear. . Coupled to end of vertical power shaft by coupling (52N). On side frame, left On vertical shaft, lower -..-do Plunger Plunger nuts Plunger stud Power clutch Power-clutch forks . . Power gear... Power pinion. Quick-motion bracket. Quick-motion clutch. . ----do •Quick-motion fork Quick-motion lower gear. Quick-motion shaft . . . Quick-motion upper gear. Racer Quick-motion shipper de- tails. Lower end of quick-motion shaft in quick-motion bracket. On quick-motion elevating system from quick-motion bracket to elevating bracket. Upper end of quick -motion shaft in elevating bracket. On traversing rollers , Racer joint bolts ! At joint on racer Range disk j On range disk fulcrum . Range di.ik fulcrum. . . ' In side frame (left) Range dis'v gear 1 On range disk Range di.sk rack ] On cradle Range scale j On range di.5k Reach rods f For clutch mechanism . Bz.. G. S. S.... G. S. Bz.. S S s C.S.No.2. S s s s Bz. No. 3., F.S F.S C.I Bz. No. 4. F. S."C". Bz S s F. S. No.3- C.S Bz. No. 3.. F.S. No. 3. C S f". s".'No."3! Bz. No. 4.. C. S. No.2. F.S. No. 3. F.S. No. 3. Bz. No. 4... C. S. No.2. (\ S. No. 3.. F. S No. 3.- Bz. No. ^ ■'' s. No. 3.. G s R. Rear bracket . Rear bracket stud. Rear clip Rear piston rod nut . . Recoil cylinder Recoil cylinder head.- Recoil cylinder strap. . Right elevation cap- - . Rivets Rivets 0.75 Rivets 0.625 Rivets Rocking le\ er . . Rod end Rollers Roller ])earing . . Roller bearings. Roller bearing . . do ..-.do Supporting platform at rear of carriage. Rear brae" et to siie frame. . On racer engaging under lip on base ring. On piston rod near gun lug. . Supported under cradle On front end of recoil cylinder On cradle supporting recoil c-ylinder. For elevating screw beam.. For liner 12A For side plates to angles For side and front plates to angles. For bushing (35D) On clutch fork shaft On fork connecting rod (52D) On roller pins For vertical shaft (lower) For horizontal shaft For handwheel shaft (44M).. do For crank shaft (45B1) C. S. No. 3. C.S. No. 3. F.S. No. 3. C.S. No. 3. C.S. No. 3. C.S. No. 3. C. S. No. 2. Bz S S Bz C. S. No. 2. C.S. No. 2. Bz Driven. A=1.18. A=2.175. A =1.8. A=1.5. Inserted after drain pipe is in. Front half (llBl); rear half (llCl). In 4 parts. 76K elev. 76L trav. Commercial. Do. Do. Do. Do. CARRIAGE PROPER— 12-INCH BARBETTE CARRIAGE, MODEL OF 1917— Continued. Piece mark. No. 85GA 1 85U 2 85EA 1 85KA 2 85N 2 85X 2 85T. 2 85AA 3 45D 2 12x1 2 76E 8 13C 52 13C 15L 14 55G 55H 27L 56B 56F 58H1 32 77P 6 A69N 3 H23U 4 56U 8 2 12N 8 30F 5 60M 1 71A 1 13K-13L 2 13A-13B 2 20A 19B1 65N 65F 65P I 65R 67R 67A 67C 64S1 64R 64N 64Q 64P1 50A A65B 35A2 27G-27M 27H-27N 27P Name of part. Location, Material. Remarks. Roller bearing Roller bearings Roller bearing Roller bearings ....do ....do ...do .• ....do Roller-bearing sleeves Roller covers Roller pins. Screws ....do ....do ....do For crank shaft (45B1) i. For quick-motion shaft (4oE)| . For traversing shaft I . do do do For slow-motion shaft For worm shaft In quick-motion bracket and bracket cover. | At opening in racer near i S joints. I In clutch forks S Side plates to front angle Tobin Bz. For front plate Tobin Bz . For auxiliary platform Tobin Bz. F. S. No. 3. Screw collar, upper. . . Screw collar, lower . . . Screw, countersunk head. ..-.do ....do ....do ....do ..-.do ....do Bz. F. S. F. S. "O". Bz. Screws, fillister head Screws, headless Screw plugs Set screws Set screw Shoulder rest support . Side angles Side plates . For indicator pointer (54G) . On upper end of elevating screw (55E1). On lower end of elevating screw (55E1). For key-way filling piece For elevating nut (56A) I S For wiper key (56E) Bz For range scale G. S For dire?tion plates Bz do ! Bz do I Bz For elevating nut cover ! Bz For piston rod ; S Oil holes in racer i S For recoil cylinder details S For lower control shaft pin- | S ion. j In trunnion cap ! F. S. No. Under outer edge of side S plate. Platform on sides of carriage . S Commercial. Do. Do. Do. Do. Do. Do. Do. 0.375 thick. Casehardened. Do. Side frame, left Side frame, right Sleeve Sleeve disks Sleeve liner , Sleeve plate Slow-motion bracket. . Slow-motion - bracket cap. Slow-motion case On racer C. S. No. 3. ....do C. S.No. 3. On traversing shaft ^ F. S For sleeve ' S In sleeve j Bz. No. 4 . . For sleeve F. S Onside frame (left) j C. S On slow-motion bracket C. S Cup point. Right (13K), left (13L). Right (13A), left (13B). Slow-motion gear Slow-motion pinion... Slow-motion shaft coupling. Slow-motion shaft (lower). Sloiv-motion shaft (upper). Speed-gear bracket . . . Spindle.. Split pin. Cn slow-motion bracket ! C. S Cn slow-motion shaft (up- Bz. No. 3... per). I On slow-motion shaft (lower) F. S. No. 1. For slow-motion shafts F. S Split pins Split pin do Split pins do Spring-cylinders . Spring-cylinder straps do i -do. From coupling to lower gear S case. From slow-motion bracket S to coupling. Attached to bottom of side ' C. S. No. 3; frame (left). For handle ' S For hori'.ontal intermediate S gear (44F1). i For elevating nut pinion S (44L1). For rod end (52E) C. S. No. 2. For spring-rod nuts S For clutch-fork shaft S For worm-bearing lock S For fork ends S For traversing crank S On cradle . supported by C. S straps. On cradle for supporting C. S, No. 2. spring cylinder. do C. On cradle for supporting C. spring. For handwheel. S. No. 2. S.No. 2. With key way. Without keyway. Without keyway or drilled hole. 26 CARRIAGE PROPER— 12-INCH BARBETTE CARRIAGE MODEL OF 1917— Continued. Piece mark. 3oBl 35C 76A 36 K 36H 36Q1 36P 36 G 36N 36L 36M 76B 59 B 46 K 56C 56G 56 K 56 D 12Z 55K 27E 30Q olBl 51E1 51G JlMl olHl lOH 51L 51 A 51C 15C-15D 68A 68J 66A 77E1 71 B 64U1 No. Name of part. Spring-cylinder head s (front) Spring-cj'linder heads (rear). Spring plungers Spring-rod ends (front) Spring-rod ends (rear) Spring rods (lower). . . Spring-rod nuts Spring-rod pistons Spring rods (upper) . . Spring separators 12 Spring-separator bushings. 2 Spring stirrups 1 Spring washer 1 Stem 2 Stop pltmgers 2 Stop-plunger keys 2 Stop-plunger pins Stop-plunger rollers. Straps ....do Strap tap bolts Stuffing-box gland. Taper pin do Taper pins Taper pin. . do ....do ....do Taper pins. Lor-ation. For spring cylinders.. On spring cylinders . . . In spring stirrups Cn front end of spring rods (lower). Cn rear end of spring rods (lower). In lower spring cylinders Cn front end of spring rods. . Cn front end of spring rod . . In upper spring cylinders . . . In spring cylmders between springs. In spring separators Remarks. ....do.... Taper pin. do ....do.... ....do.... ....do.... ....do.... Cn treadle bars C n ele\ ating pointer worm. For handle (46L) In elevating nut (56A) In stop plimger (56C) In stop plunger for stop- plunger rollers. On stop plunger (56C) Oil pipes to racer On sides of head on elevat- ing screw. For straps 27G, 27M, 27N, 27P, 27F. At rear end of recoil cylinder. For vertical shaft (lower) For collar (44D) For vertical shaft coupling (44K). For tlirow-out shaft (51A) ... For idler fulcrum (51F) For throw-out pinion For coupling (52N) For indicator-shaft couplings (54L). For elevating-pin nut (55M). For range-disk fulcrum For idler-sheave pin For traversing shaft do For hand wheel shaft do Taper pins . do Taper pin. do ....do.... Throw-out crank . Throw-out gear. . Throw-out gear cover. Throw-out gear sup- port. Throw-out housing . . . Throw-out pinion . . . . Thrust plates Throw-out plugs Throw-out plungers . . Throw-out plunger For crank shaft For slow-motion shaft coup- ling. For worm shaft For clutch-fork shaft ....do springs. Throw-out shaft . Throw-out shaft nut. "^ plates .^ersing bracket . . \ersing case versing clutch — ,-ersing cranks . . . 'raversing crank- shaft brackets, t^ersinggear Top, Trav( Trav( Trav( Trav Trav( On throw-out shaft (51A) ... On tln-ow-out gear support (olG). Over throw-out gear To elevating bracket-sup- porting throw-out gear. Over throw-out crank and attached to throw-out gear. On horizontal shaft Under base ring In throw-out housing (51 M) In throw-out housing Operating throw-out plun- ger in throw-out housing. In throw-out gear support attached to elevating bracket. On throw-out shaft (51 A). . For auxiliary platform On racer On traversing bracket On traversing shaft On crank shaft On side frames C.S C. S. No. 3.. F. S. No. 3.. F. S. No. 3.. F. S. No. 3.. F. S. No. 3.. F. S. No. 3.. Bz F. S. No. 3.. C.S Bz. No. 4.. Bz.No. 3.. S F.S T. S. "B" S ,.... S Bz.No. 4.... S F. S. No. 3.. Bz.No. 2... S S F. S. No. 1. S s s s On traversing shaft . S S S S S s s S S s s s F. S. No. 3. Bz.No. 4... Fl.S Bz.No. 3... Bz.No. 3... Bz. No. 4... S Bz. No. 3... F.S. No. 3. Sp. S F. S. No. 1. S s C.S. No. 2. C.S. No. 2. Bz.No. 4... F.S C. S. No. 2. C.S. No. 3. Tempered. 0.125 thick. 27 CARRIAGE PROPER— 12-INCH BARBETTE CARRIAGE MODEL OF 1917— Continued. Piece mark. No. Name of part. Locasion. Material. Remarks. A69M 64T 65H 65K1 lOK lOL 64A 76F 76P 76C 21 E 21B-21C A66L 77C 77F 48G 48M 34B 44H 52H2 44 Kl 44B1 44A1 58F1 65S 77D 77G A65C 46C U39F o6E 6oC 68K 68H 65G 59E 65A1 6oD lOF 12D-12E 12B 59G 59K Traversing hand- wheel direction plate. Traversing pinion Traversing rack Traversing-rack ■Screws. Traversing rollers Traversing-roller pins. Traversing shaft Treadles Treadle bars Treadle springs Trunnion bushings . . . Trunnion caps Tubes -...do ....do Upper control pinion . Upper control shaft. . . Valve body Vertical intermediate pinion. On hand wheel. Vertical power shaft. . Vertical -shaft coup- ling. Vertical shaft (lower). Vertical shaft (upper) Washer ....do ....do ....do -...do Washer crown nut Water bucket Wiper key. Worm Worm bearing Worm- bearing lock. Worm gear Worm housing Worm shaft Worm-shaft gear Wrench-hole covers. . Wrench-hole covers (front). Wrench-hole covers (rear). Zero strip Zero strips On traversing shaft . In base ring For traversing rack . Between racer and base ring. In traversing rollers In traversing bracket Through left platform On treadles In spring stirrups Trunnion seat in side frames. On side frames For shoulder rest For elevating crank For traversing cranks On upper control shaft From elevating bracket to control bracket. In bottom of recoil cylinder. On vertical power shaft en- gaging with horizontal in- termediate gear (44F1). Connecting from vertical shaft (lower). Connecting vertical shaft (upper) and vertical shaft (lower). Elevating slow-motion sys- tem, do. For range-disk fulcrum. For sleeve For elevating crank For traversing crank . . . For handle For lever fulcrum pin . . With carriage On elevating nut for elevat- ing screw wiper. On worm shaft In traversing bracket On traversing bracket On sleeve On elevation-pointer bracket From worm-shaft gear to traversing bracket. On worm shaft On base ring opposite inner foundation bolts. At point of racer joint -do. On worm housing On elevation pointer. Bz S F. S. No. 2-- S C. S. No.3.. S F. S. No.3.. C. S. No. 2.. Bz. No. 2.... Sp.S Bz. No. 4.... C. S. No. 3.. R Br Br F. S. No.3.- F. S. No.3.. F.S.No.3... F.S.No.3... F.S.No.3.. F.S.No.l.. F.S.No.l.. F.S.No.l.. F.S Bz.No.4... S S s s Indurated fiber. S F.S.No.3.. C.S.No.2.. S Bz.No.4... C.S.No.3.. F.S.No.3.- Bz.No.3... S S s G.S G.S For handwheel. Commercial. 0.25 thick. Do. Do. 28 AZIMUTH POINTER— 12-INCH BARBETTE CARRIAGE, MODEL OF 1917. Piece mark. No. Name of part. Location. Material. Remarks. 69C 8 88 64 80 2 64 112 56 72 1 1 10 2 1 16 8 8 2 Bases For azimuth circle S 69F Bolts, tap do. s 69G do do s 69H do do S . 70F Collars On screw Bz G.S 70B Index In slide 70M Lid C.S Bz Bz Bz C.S S s s 70D Nut In pointer body 70N Pin For lid 70G1 Pointer body In pointer case . . 70K Pointer case On racer Rivets do do do do do do sunk. Do. s .: 69A Scale do Bz In 8 sections 70E Screw In pointer body TobinBz.... Bz 70L Screws, countersunk head. Screws, fllister head. . . Screw, filister head . . . Sleeves For pointer case . 70H For pointer body Bz 70C For index Bz 70P- 70Q 70A On collar G. S /One R. 70P. \One L. 7GQ. Slide In pointer body Bz 69E Stiff eners For azimuth circle . . s 69D Straps do s 69B Supports do s Taper pins For screw G S LIST OF PARTS FOR SHOT TONGS (7 PAIRS FOR EACH CARRIAGE), 12-INCH BARBETTE CARRIAGE, MODEL 1917. NC16B 2 2 1 2 2 2 1 2 1 4 2 1 1 4 4 Cams In frame Bz NC16D Cam bolts For cams.... F.S . NC16N Clevis In frame F.S NC16K Clip blocks On rope. F.S NC16M Clip nuts For clip blocks F.S NC16L Clip washers Frame do Portable F.S NC16A C.S NC16F Links. In cams F.S NC16P Nut S NC16E Nuts For cam bolt. s... 312/j thick Pins For links s NC16H Ring. .. On rope. F.S NC16J Rope On links Wire rope... F S NC16G Rope guides In frame NC16C do F.S. .. . LIST OF PARTS FOR SPRING COMPRESSOR FOR 12-INCH BARBETTE CARRIAGE, MODEL OF 1917. 85D 1 85E 1 U244B 1 U244G\ U244H/ 2 U243A 1 U244N 1 U244L 1 U244K1 1 1 4 1 1 Ball thrust bearing . . do Bushing Centering rings Coupling Compressor crank Crank fastening Frame nut Grease cup, Lunken- heimer No. 4 Tiger or equal. Oil plugs Pin ....do For worm For worm wheel In spring compressor frame. /For end of spring compressor X-rj, Ar/^ o 1 frame. Miz.JNO./... In spring compressor frame . . On worm On compressor crank In spring compressor frame . . For spring compressor frame. In spring compressor frame . , For coupling For spring compressor screw. Commercial. Do. /U244H,A=6.24. \U244G,A=6.11. Complete. Commercial. Driven. 29 SPRING COMPRESSOR, 12-INCH BARBETTE CARRIAGE, MODEL OF 1917. Piece mark. No. Name of material. Location. Material. Remarks. U244F 1 1 1 1 2 1 1 1 1 1 In spring compressor frame . In spring compressor screw.. Adjusted to recoil band In spring compressor frame. . In spring cylinders S U243C S U244E1 U243B1 Spring compressor frame. Spring compressor screw. Thread, guard C.S.No.2... S U243D c U244P For compressor crank . do Br U244M Washer S U244A Worm In spring compressor frame. . do On spring compressor screw. F.S.No.3... Bz.No.4.... Bz.No.4.... U244C1 U244D Worm nut Worm wheel LIST OF PARTS FOR FILLING DEVICE FOR 12-INCH BARBETTE CARRIAGE, MODEL OF 1917. U251G 1 } 1 Aircock, lever handle. EllO 5 For filling funnel . Br Lunkenheimer fig. 980 or equal. ' U251C do Br XT 251 B Ferrule do Bz U251A . ..do C 0.062 {^) thick. U251E Nipple 5 by 3 do. . Br U251N Nut do Bz U251L Pipe do do do. Br 46. 5 long. U251M Br 58.5 long. U251P do Bz U251Q U251D TeeO 5 .do Br Union 0.5 do Bz Lunkenheimer ifig . U251F Washer .do Lea... . . . 457 or equal. 0.125 thick. GREASE CUPS (18 PER CARRIAGE), 12-INCH BARBETTE CARRIAGE, MODEL OF 1917 A2A A23 A2D1 A2E3 A2J A2G A2H A2F A2C1 A2K Body Cap Cup, leather. Gaskets Pin Plunger Plunger nut . Screw, round Screw Spring Washer Washer, lock Screwed into carriage On body Under plunger Between body and oil pipe when grease cup is seated on pipe connection. In plunger Inside body On plunger For plunger Secures cup leather to plunger. Between cap and plunger. . Under cup leather For plunger Bz Bz Lei C. Bz Bz Bz Bz Bz S., Bz War Department, Office of the Chief of Ordnance, Washington, August 8, 1917. Form No. 1722. Ed. Aug. 8-17—1,000. ^ <-;' "5 K'''^P \>,. 14 DAY USE RETURN TO DESK FROM WHICH BORROWED LOAN DEPT. Ttis book is due on the last date stamped below, ot on the date to which renewed. Renewed books are. subject to imm ediate recaU. j^ .^^'^ ^ LD 2lA-50m-8,'61 (C1795sl0)476B General Library , University of California Berkeley Cay/ord Bros. Makers Syracuse, n y YC 6434 ^7 "-. U '= •-■(■( ; I Hn B UNIVERSITY OF CAUFORNIA UBRARY '■■ »■ *- X 5^ > kl.l» ^*'