WAR DEPARTMENT TECHNICAL MANUAL z *TM 9-710— RESTRICTED BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, AND DIAMOND T) WAR DEPARTMENT 23 February 1944 RESTRICTED relations agencies.: (See also paragraph 18b, AR 380-5, 28 September 1942.) ©This manual supersedes TM 9-710A, 16 Sept 1943; TM 9-708, 9 Feb 1943; TB 710-10, 1 Jul 1942; TB 710-17, 2 Sept 1942; TB 710A-19, 12 Nov 1942; TB 712-1, 1 Jul 1942; TB 712-2, 25 Jun 1942; TB 715-2, 1 Jul 1942; TB 715-3, 25 Jun 1942. ‘This manual also supersedes pertinent information from TB 700-26, 12 Dec 1942; ‘TB 700-47, 12 Apr 1943;-TB 700-63, 10 Jun 1943; TB 700-65, 10 Jun 1943; TB 700-74, 1 Jul 1943; TB 700-82, 21 Jul 1943; TB 700-83, 23 Jul 1943; TB 700-88, 6 Aug 1943.WAR DEPARTMENT Washington 25, D. C., 23 February 1944 a TM 9-710, Basic Half-track Vehicles (White, Autocar,and Diamond T), is published for the information and guidance of all concerned. {A.G, 300.7 (21 Aug. 43)] By Oper OF THE SECRETARY OF WAR: G. C. MARSHALL, Chief of Staff. J. A. ULIO, Major General, The Adjutant General. TION: D (5); B 2 (3); R 2, 5, 17, and 18 (3); Bn 9 (2);” IBn 2, 5, 6, 7, 17, 18, and 44 (3); C9 (8); IC 2, 5, 6, 7, 17, 18, and 44 (5). (For explanation of symbols, see FM 21-6.)CONTENTS TM 9-710 PART ONE—VEHICLE OPERATING INSTRUCTIONS SECTION z Vir Introduction... 6.6... ese Description and tabulated data Driving controls and operation Auxiliary’ equipment controls and operation.........4. Operation under unusual conditions Inspection and preventive maintenance services Lubrication Tools and equipment stowage on the vehicle........... Paragraphs Pi 1, 24 5-7 8-9 10-16 17-21 22-23 24-33, 5 6-22 23-31 32-33 34-43 44-53, 54-66 67-94 PART TWO—VEHICLE MAINTENANCE INSTRUCTIONS Ix = xI xi XIII xXV XVI XVIL XVUI XIX XxX Xx XXL XXIV XXV. XXVI Record of modifications and new vehicle run-in tests. Organization tools and equipment Organizational preventive maintenance services... .. Trouble shooting.......... Engine data, maintenance, and adjustment in'vehicle Engine removal and installation ............+ Clutch . Fuel system Intake and exhaust wajetin Cooling system....... Ignition system Starting and generating get ‘Transmission, transfer. case, and power take-off....... Propeller shafts and universal joints . Front axle. Rear axle (jackshaft)....... Bogie suspension and track. Brake system..........- a 34-37 38-39 40 41-57 58-66 67-68 69-72 73-78 79-82 83-89 90-96 - 97-100 101-103 104-106 107-111 112-115 116-120 121-134 95-99 . 100 101-117 118-132 133-147 148-156 157-159 160-169 170-173 174-186 187-199 - 200-206 207-213, 214-217 218-224 225-228 229-250 251-285T 9-710 BASIC HALF-FRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) Section XXVII XXVIII " XxXIx XXX XXXI XXXIV XXXII XXXIV Wheels, sprockets, hubs and bearings, tires, and chains Springs and shock absorbers Steering gear and drag link Body and frame.......... Battery and lighting system Instruments and gages. Winch : Shipment and temporary storage ..... Poragraphs 135-138 139-140 141-142 143-151 152-159 160-165 166-170 171-173 PART THREE—VEHICLE ARMAMENT XXXV REFERENCES Inpex Armament 174-185 Pages 286-292 293-295 296-302 303-309 310-319 320-325 326-330 331-335 336-347 348-351 352-™ 9-710 PART ONE—VEHICLE OPERATING INSTRUCTIONS Section I INTRODUCTION 1. “SCOPE. a. This technical manual’is published for the information and guidance of the using arm personnel charged with the operation, main- tenance, and minor repair of this materiel. b. The specific vehicles derived from the’basic half-track which is covered by this manual are designated: (1). Car M2 and M2A1, (2)° Personnel Carrier M3 and M3At. (3) 81-mm Mortar Carriers M4 and M4A1. (4) 75-mm Gun Motor Carriage M3 and M3A1. (5) _75-mm Howitzer Motor Carriage T30. (6) 105-mm Howitzer Motor Carriage T19. (7) Multiple Gun Motor Carriage M13. a) Multiple Gun Motor Carriage M15 and M1S5A1, *(9) | Multiple Gun Motor Carriage M16. (10) 81-mm Morter Carrier M21. e. In addition to a description of the-basic half-track vehicle, this manual contains technical information required for the identification, use, and care of the specific vehicles listed in subparagraph b above, and similar vehicles, This manual is divided into three parts, Part One, Section I through Section VIII, gives vehicle operating*instructions. Part Two, Section IX through Section XXXIV, gives vehicle mainte- nance instructions to using arm personnel charged with the responsi- bility of doing maintenance work within their jurisdiction. Part Two also includes instructions for preparing the vehicles for shipment and temporary storage. Part Three, Section XXXV, gives armament data. d, In alf' cases-where the nature of the repair, ‘modifications, or _ adjustment is beyond the scope or facilities of the unit, the responsible Ordnance Service should be informed so that trained personnel with suitable tools and equipment may be provided, or proper instructions issued.T™ 9-710 2-3 BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) Section I DESCRIPTION AND TABULATED. DATA Description 4 “Differences among models. Tabulated data 2, DESCRIPTION. a. . The armored vehicles covered in this manual are the half-track . type, consisting of a wheel suspension in the front, and a bogie and track suspension in the rear. The chassis is.essentially the same on all the models with the main differences being in the armor plated body, converting the vehicle to best advantage for its specific duty. The chassis: equipped ‘with heavier armament are reinforced with extra frame’ members to carry the additional load. A roller or winch is mounted on the front end of the frame. The vehicles have doors located at advantageous positions, or side pariels which fold down to gain gun depression. The vehicle has front and rear drive and is powered by a six cylinder gasoline engine. 3. DIFFERENCES AMONG MODELS. a. Car M2 (figs. 1 and 2). This vehicle has a seating arrangement for a crew of ten. A driver's seat, commander's seat, and one other seat are in the driver’s compartment. Arrangement of all seats is shown in figure 39. A gun rail extends throughout the inside of the body allowing the movement of the-guns mounted on skates to command full 360 degrees rotation, There is no rear door on this model, but it has two large ammunition storage compartments with outside doors, located just behind the driver’s compartment. A lid on each stowage chest opens fiom inside the vehicle, allowing removal’ of ammunition boxes from the top shelf. Access to the remaining shelves is reached from outside the vehicle: The gas tanks are located inside the vehicle body atthe tear sides, ‘A radio mast is located at the side of the’ rear center seat: ‘There are no rifle scabbards or gun pedestals on this model and it ‘comes equipped with a roller or a winch at the front end of the vehicle: The ‘M2 armament consists of one caliber 30 and one caliber 50 machine gun and a caliber .45 submachine gun. A top view may be seen -by referring to figure 39, b. .Car M2A] (figs. 3 and 4). This vehicle is the same as the Car M2 with the addition of a ring mount on the front side of the driver's compartment, It has one caliber 50 machine gun in ring mount. There ate-also.three pintles for caliber .30 machine guns, located one on each side, and one in rear. c. Personnel Carrier M3 (figs. 5 and 6). This vehicle has a seating arrangement for a crew of 13 men. There are three seats in the driver’s compartment and the other ten are arranged in two rows of five each, backed up against the fuel tanks and -body sides. The fuel tanks are 6T™ 9-710 3 DESCRIPTION AND TABULATED DATA eee RA PD 313982 Figure 1—Car M2 (Right Front) . ~~ “er RA PD 313983 Figure 2—Car M2 (Left Rear)™ 9-710 3 BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) ee s ner RA PD 313984 Figure 3—Car M2A1 (Right Rear) Figure 4—Car M2Al (Left Rear) ae $6™ 9-710 3 _ DESCRIPTION AND TABULATED DATA RA PD 319986 Figure 5—Personnel Carrier M3 (Right Front) RA PD 313987 Figure 6—Personnel Carrier M3 (Left Rear)TM 7-710 3 BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and RA PD 313988 j Figure 8—Personnel Carrier M3A1 (Right Rear) 10™ 9-710 3 RA PD 330852 Figure 9—Personnel Carrier M3AI (Front) RA PD 309120 Figure 10—81-mm Mortar Carrier M4A1 (Right Side) Wemer te 3 BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) RA PD 313990 Figure 11—75-mm Gun Motor Carriage M3 (Right Front) es ae RA PD 313991 Figure 12—75-mm Gun Motor Carriage M3 (Left Front)RA PD 313992 Figure 13—75-mm Howitzer Motor Carriage 130 (Right Front) RA PD 313993 Figure 14—75-mm Howitzer Motor Carriage T30 (Left Rear) 133 BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) located just behind the driver’s compartment at the sides of the vehicle. There is no gun rail or radio mast inside the body of this vehicle, but it has one pedestal, mounting a caliber 30 machine gun, located just behind the center seat of the driver's compartment (fig. 40). A door is located at the rear of this model, and it also has rifle scabbard mounts, six on each side, along the sides in the space at the back of the side seats. A top view may be seen by referring to figure 40. RA PD 313994 Figure 15—-105-mm Howitzer Motor Carriage T19 (Left Front) d. Personnel Carrier M3A1 (figs. 7 and 8). This vehicle is the same as the Personnel Carrier M3 with the addition of a gun ring mount on the top right side of the driver’s compartment. e. 81-mm Mortar Carriers M4 and M4A1 (fig. 9). These vehicles carry a crew of eight men with the usual seating arrangement for three in the driver’s compartment. Each vehicle has a gun ring running ¢om- pletely around the inside of the body, mounting one caliber .50 machine gun on a skate mount. A caliber .45 submachine gun and one 81-mm mortar complete the armament. There is an extra door at the rear of the vehicle and two extra doors for the stowage compartments at the front sides of the body. The gas tanks are located at the rear sides of the body. 14IM 9-710 3 DESCRIPTION AND TABULATED DATA f, 75-mm Gun Motor Carriage M3 and M3A1 (figs. 11 and 12). ‘These vehicles carry a crew of five men, seating two in the driver’s com- partment, one on each side of the body at breech of gun, and one against rear door, The armament consists of one 75-mm gun with an armor plate hood which covers the breech of the gun and moves with the pointing of the gun. The gas tanks are mounted in the rear at each side of vehicle body. A top view may be seen by referring to figure 42. Ps z rd Figure 16—105-mm Howitzer Motor Carriage T19 (Left Rear) g. 75-mm Howitzer Motor Carriage T30 (figs. 13 and 14). This vehicle has a rear door and a gun pedestal mount at the rear center which carries a machine gun, There is no gun rail inside the body and the gas tanks are mounted in the rear at the sides, An armor plate hood covers the breech of the 75-mm howitzer. A crew of five men is carried. | h. 105-mm Howitzer Motor Carriage T19 (figs. 15 and 16). This vehicle has a rear door and a gun pedestal mount at the rear center which carries a machine gun, There is no gun rail inside the body and the gas tanks are mounted in the rear at the sides. An armor plate hood covers the breech of the 105-mm howitzer. A crew of six men is. carried. 153 BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) RA PD 313996 Figure 17—Multiple Gun Motor Carriage M13 (Right Front) RA PD 313997 Figure 18—Multiple Gun Motor Carriage M15 (Right Front) 16NE 97107 DESCRIPTION AND TABULATED DATA RA PD 313998 Figure 19—Multiple Gun Motor Carriage M15 (Left Rear) GUN SUPPORT FILLER CAPS } RA PD 313999 Figure 20—Gun Support and Fuel Tank Filler Caps M15 7TM 9-710 z BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND,T) i. Multiple Gun Motor Carriage M13 (fig. 17). This vehicle has an electrically operated gun turret, carrying its own battery charging ‘unit, The turret mounts two caliber 50 machine guns and turns a full 360 degrees. There is no gun rail, pedestal mount, or rear door on this model, There are folding ‘panels at the two sides and rear end of the body. The gas tanks are mounted just to the rear of the driver’s compart- ment on each side. of the body. This vehicle carries a crew of five men. j. Multiple.Gun Motor Carriage M15 and MISAL (figs. 18 and 19). This vehicle has a manually operated gun turret mounting three synchronized guns. The'turret turns a full 360 degrees, mounting one .37-mm automatic cannon and two caliber .50 machine guns. The ‘driver's compartment and gun turret are separate units on this model. Two gas tanks are located at the center of the vehicle, the upper tank just behind the driver's compartment, and the lower tank is below the level of the floor just to the rear of the upper tank. The filler spout-of the lowér tank rises atthe left-hand rear corner of the upper tank (fig, 20). A gun support (fig, 20), located on the rear of the driver's compartment, and two turret locks (fig. 21), lock the turret and cannon in position while traveling. This vehicle carries a crew of seven men, The M15A1 is a later model; the main difference is a change in mount- ing the cannon and two machine guns at a common level (the cannon is below the level of the machine guns in the M15). A top view of the M15 may be seen by referring to figure 43. k. Multiple Gun Motor Carriage M16 (figs. 22 and 23), This vehicle resembles the M13 Multiple Gun Motor Carriage. It has an electrically operated gun turret with four caliber .50 machine guns in place of two as on the M13. The folding side and rear panels have a dip or section cut out of their top edge to permit more gun depression. The M13 becomes an M16 with the above changes incorpotated.’A top view may be seen by ieferring to figure 44, 1. 81-mm Mortar Carrier M21 (Forward Firing) (fig. 24).This vehicle carries a crew of six men. Its armament consists of an 81-mm mortar which fires forward only; oné caliber 50 machine gun and pedestal mounting; one caliber .45 submiachiné gun. 18TURRET LOCK RA PD 314000 Figure 21—Turret Lock M15 RA PD 314001 Figure 22—Multiple Gun Motor Carriage M16 (Right Front)™ 9-710 4 BASIC HALF-TRACK VEHICLES (WHITE, AUJOCAR, and DIAMOND T) 4. TABULATED DATA. = -_ = z $ Vehicle g 3 z ys § 7 Specifications. = z 33 ged ESE & 8 852 aid 226 Wheelbase i in. 13534 1354 13514 “13516 13534 Length (Roller). in. 234 23434. 24254 243% 243% (Winch) in. 241 24154 24956 25084 250% Width " vin. 87 8734-87487 ««77%K_—«8714 Height... in. 89 951% 89 95% 8934 “8934 Wheel size in, 20x? 20x? 20x7_—20x7 © -20x7 20x? Tire size (front). in, 8.25x20,8.25x20 8.25x20, 8.2520 8.25x20 8.25x20 Tire type |, Combat Combat Combat Combat Combat Combat Tread in, 63136 635% 63% 63156. 631% 631% Crew... w. 0 1 13 6 6 ‘Weight-(gross). 19,195 19,600 17,650 20,500. 17,350 18,000 Ground press. (unit) 16 per sqin. 45 i : “Ground clearance. . in. 176 1% 17% 11% 17% 17% Pintle height........ in. 28 28 28 28 2% 28 Octane rating of fuel (gasoline).. 72 72 72° 727272 Approach angle (Roller)....deg 37 37,3737 B78. (Winch)...deg 3232, 323s BR Departure angle deg 35 35 935 353538 b. Performance. ee Mph Speeds allowable ((Ist gear) 9.15 9.15 915 9.15 9.15 9.15 without front wheels |Qndgear). 173 173 173° 1730173173 Griving (transfer case |(3rd gear) 26.2 ~ 26.2 ° 26.2 26.2 26.2 26.2 inhigh range) _ |(4thgear) 45 45, 45 45 45 45 Speeds allowabic (Ist gear) 3.68 3.68 3.68 3.68, 3.68 3.68 with front wheels |(2ndgear), 6.96 6.96 6.96 6.96. 6.96 6.96 driving (transfer case |(3rd gear) 10.45 10.45 10.45 10.45 10.45 10.45 in low range) (Gch gear) 18.05 18.05 18.05 18.05 18.05 18.05 ‘Min, turning circle (diam.)...ft- 59 59 59 39 60 60 Maximum fording depth.....in. 32 32 32 32 32 32 ‘Towing facilities (front) Two Two Two Two Two Two tow tow tow tow tow —_ tow hooks hooks hooks hooks “hooks hooks cesses, Pintle Pintle Pintle Pintle “Pintle Pintle Max. grade ascend. ability..pct 60 60 60 6D 60 Max. governed engine speedrpm 3,000 wenn s gens ‘ ‘Miles per gallon (approx.). 3% -3% 34% 3% 3% 3% Cruising range (approx.)....mi 200 220 © 200 «220» 200200 c. Capacities. . 5 Trans. cap. (less P.T.O.)....at. 74% 74 4 7% TH 1% 9 9 Trans. case cap. (with P.T.O.)at 9 9 9 9 Front axle capacity.........qt 3144 34 34 3% 34% | 3% Rear axle capacity a8 9 9 9 9 9 Fuel capacity... gal 60 60 60 60 60 60 Cooling system capacity... gal 614 6% 6 6% 6% 6 Crankcase capacity. od 12 12° 12 12 12 12 20TM 9-710 4 DESCRIPTION AND TABULATED DATA Ze: a. ge @ 5 2 $.8 Bes $56 22H 23% fat ise &? ai iat = i zai £35 aig sf 26 226 13334 135146 1354 3544 13546 13516 13514 24974 249% 240% .. 36}4 236}4 ......... . re. B56 24476 17K TRS 77M 98 TTR BTK 92 92 8314 88 8B 104 104 88 87 20x7 20x7—20x?_—-20x7_—-20x7—-20x7_-20x7—-20x7—-20x7? 0x7 8.25x20 8.25x20 B.25x20 8.25x20 8.25x20 8,25x20 8.25x20 8.25x20 8.25x20 8.25x20 Combat Combat Combat Combat Combat Cémbat Combat Combat Combat Combat 63134 6316 63% 63194 6344 63NG E33G 53134 636 b31g 5 5 NS § 6 3 7 7° 38 6 19,000 20,000 20,000 20,500 19,240 18,500 20,000 20,000 19,000 20,000 33.5 33.5 29.5 33.5 33.5 29.6 17 WK. 1K KKK TTT 28 28 28 28 28 28 28 28 2B 28 72 2 2 72 72 2 2 7a 2-72 37 378737 37 37. 3737 37 32 32 3232 32 3232 3232 32 3535 35 35 35035 35-3538 35. 915 915 915 915 915 915 915 91S 9,15 9.15 17300173 173" 173178178 178 TB 7B TS 26.2 26.2 26.2 26.2 26.2 26.2 «26.2 26.2 26.2 26.2 45 45 4545 45 45 45 45 45 45 ‘3.68 «3.68 3.68 «3.68 3.68. 3.68 «3.68 3.68 | 3.68 3.68 696 6.96 696 6.96 6.96 696 6.96 696 6.96 6.96 10.45 10.43 © 10.45. 10.45 10.45 10.45 10.43 10.45 (10.45 10.45 18.05 18.05 18.05 18.05 1805 18.05 18.05 1805 18.05 18.03 32 32 32 32 32 32 32 32° 32 32 Two Two Two Two Two Two Two Two Two Two tow tow tow tow. tow tow tow tow tow tow hooks hooks hooks hooks hooks hooks hocks hooks hooks hooks Pintle Pintle Pintle Pintle Pintle Pintle Pintle Pintle Pintle Pintle 3% 3 «BM BKB 36 8G 31GB BK 200 200 «200 «200» 200 «200-« 200» 200» 200,200 46 TM 71M TMK OMT TTT 9 9 a 2 s 9 9 5 § 9 34. 34 3G BM BM BH BKB KB * g 9 9 9 - 9 9 9 9 9 60 50 60 60 60 60 6 60 60 60 6 6s 66 64 64 64 6K 64 64 64 2 12 22a aa™ 9-710 4 BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) RA PD 314002 Figure 23—Multiple Gun Motor Carriage M16 (Left Rear) Figure 24—81-mm Mortar Carrier M21 (Forward Firing) 22TM 9-710 5 Section Ill DRIVING CONTROLS AND OPERATION Controls Operation of the vehicle. Towing the vehicle. ... CONTROLS (fig. 25). a. Windshield Wiper Control Buttons. The two windshield wiper control buttons are part of the wiper units which are located at the bottorn center panel of each windshield. Pull button out to start wiper, push button in to stop. bh. Panel Light Control Rheostat. The instrument panel light control is located directly under the left-hand windshield wiper. ui Turn knob counterclockwise ‘to illuminate instruments to desired in- tensity, turn clockwise to turn lights off. The service headlights must be in use before the panel. lights will go on. ec. Electric Brake Load Control. The electric brake load control is a radio-type dial rheostat located on the left side of the instrument cluster. The dial is marked “LIGHT,” “MEDIUM,” and “HEAVY,” to cover varying trailer loads. Turn dial to right-to increase braking on trailer brakes as trailer load increases. d. Main Light Switch (fig. 26). The main light switch, located directly above the electric ‘brake control, is a four-position push-pull type switch, This switch controls the service and blackout headlights, and the service and blackout: stop and taillights in the following manner. F (1) OFF Position. Push switch button completely in to turn off all lights, NOTE: Service stop lights cannot be used with button in this position. (2) © BLackour -Posrrion. Pull ‘switch button to first position to operate blackout headlights, and blackout. stop, and taillights. (3) Service Liguts Position. Depress lockout button and pull switch button to second position to operate service headlights, and service stop, and- taillights. (4) Service Stor Licut Position: Depress lockout button and pull switch button fully out to operate service ; stop light for day- light use. e. Blackout Driving Light Switch (fig. 25). The blackout driving light switch, located on the instrument panel to the right-hand cen- ter of the speedometer and marked “B. O. DRIVE”, energizes the blackout driving light (if one is installed), which is a shielded type, used in addition to the standard blackout lights, when additional illumination is necessary during blackout conditions. Blackout. driv- ing switch will not operate-unit until main light switch is-in first or blackout position, as previously explained. 23ee eee, BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) oorle ad va s]04ju0D pup sjuawinsssuj—gz esnBly _M XM AZ Ww av ovav av dv Ov HY 24™ 9-710 5 DRIVING CONTROLS AND OPERATION s10.ju05 pu sjuauinsjsuj—sz asnB4 405 puebey agoole Gd va BIVId NOLAVD 3NIONa—!¥ GNVH JHOI—IO¥INOD YOLVILNEA — X SLVId LNAWNYLSNI LIIHS Yv3O —tV JWwaad H>LA1D HV TOULNOD GOT 3xVHd DRLDI—9DV. YIAI] TOYLNOD YILLNHS YOLviavy — A QNVH 1431 —IOWLNOD YOLVILLNIA — Av Wwaad ayvua—av - _ YAR AUIHS “O “L “d OW IAA LIS AVIO NOISSIWSNYaL — 9¥ Waid YOLWYI1IN9¥ — av ¥aAaT aNVUE ONDRiVE —w JOXLNOD 3YOHD — Z YIART ASIHS ASV) YRdSNVAL— A HOUMS YOID31aS INVA 13nd —1 YAAT] LIIHS “3AIG aX LNOwI —M ssvdwOd — BIVId NOLNVD HONIM.— A aauawoaaads — PF HDLIMS NOILINDI— 1 YAHSINONILXS vid — L NOLING HSNd ¥ILYWLS —H 3LV1d NOUVELSIORS 3IDIHIA — $ TOYLNOD FLLOYHL —9 AIND LHO —IOYLNOD' 43dIM_GTAIHSANIM — 4 £ “ . HOLIMS 1HOIT NIVW —a ' “’OOd INIWLYWdWOD dvW—O AVISO3HY TOULNOD LHON TNVd— a NOLING HSNd YaLaWLIOA —~ * yausmid LNaWNaLSNI— 4 © 4INA 4437 YULBWLIOA—O . —IOYLNOD UII ATRINSANIM — 3° AHON HSva—N aTV1d3D3¥ LHON ENO — a HOLIMS LHON ONIARIG LNODvIa — Ww 43,3aWOHDV1 —V¥ 0 aT™™ 9-710 5 BASIC HALF-TRACK. VEHICLES (WHITE, AUTOCAR; and DIAMOND T) f, Ignition Switch, -The ignition switch is marked “IGNITION,” and is located, between the instrument cluster.and the speedometer. This: switch, being the lever type, does not require -a key. Turning the lever to the left turns the ignition on, returning it to the verzical position turns it off. 5 g., Starter Push. Button (fig: 27). This button is on the dash just above the ignition switch between. the instrument cluster and speed- ometer: To- crank ‘engine, turn ignition switch to the left and. press starter push button, Release button the instant engine starts. bh.” Fuel Tank, Selector Switch. .This.is a toggle ‘type switch, located ‘just below’ the center strip of the windshield on the instru- ment panel. Push toggle to right for reading of right-hand tank supply. Push toggle to left for reading of left-hand tank supply..'The ignition switch must be “ON” before a reading can’ be made. i, Dash Light, The dash light is located just above the ammeter. The service headlights must be “ON” before it is operative. A knob, located at.the lamp base, turns the dash. light tothe right to “ON” "position; to the left turns it “OFF.” j. . Choke Control Button. The control button-marked “CHOKE”. is located directly below the speedometer. This regulates the fuel and air mixture to aid ‘starting when the engine is cold. Pull out just far enough ‘to’ allow the engine to run smoothly during the warm-up period. Otherwise the button should remain at position while engine is-in operation. : k. Throttle, Control Bution, “The | control.’ button. marked “THROTTLE?” js located directly below the. ignition switch and starter button. -Puil this button out to regulate the speed of the “engine -during the warm-up ‘period dt .during engine tests. Do not ‘use the throttle control button to control the speed,of the vehicle in’ motion; 1. - Ventilator Control Buttons, Two ventilator control buttons of.the pusk-pull iype are located.on the bottom edge of the dash marked “VENT.” The right-hand ventilator‘control button is just to the right of the choke. button, and the left-hand ‘ventilator control button is just to the left’ of the throttle button. Pull buttons out to open’ ventilators. - “qm, Horn Bution. ‘The horn button ig located at the center of the, steering wheel. Press the horn button to operate the’horn. n. Radiator Shutter Control Lever. The radiator_atmor plate shutters are controlled by a lever located-at the extreme right-hand- side of the driver's coriipartment, .just ‘under the -instrument panel. To open ‘shutters, press button on top of lever’ handle- releasing loéking latch, then pull ‘lever to extreme rear position and release” button. 'To' close shutters, press button’ and. push lever to extreme forward position: There ate “three intermediate settings between fully open and fully closed positions. . o. Front Axle‘Drive Shift Lever. The front axle drive shift Hever ‘is the first lever starting at extreme right of the cénter. floor plate. It has two positions, Push lever forward to engage .the front axle 26™ 9-710 5 DRIVING CONTROLS AND OPERATION drive. Pull lever rearward to disengage front axle drive (fig. 28). p. Transfer Case Shift Lever. The transfer case lever is the second lever from the right-hand side of the center floor plate. It has two positions. Push lever forward to put transfer case in low gear range. Pull lever rearward to put transfer case in high gear range (fig. 28). | q. Transmission Gearshift Lever. The transmission gearshift lever is the third lever from the right-hand side of the center floor plate. It is used in conjunction with the clutch pedal to select the various gear ratios or speeds provided in the transmission. The transmission has four speeds forward and one reverse (fig. 28). r. Clutch Pedal. The clutch pedal is the pedal to the left of the | steering column in the driver's compartment. Depressing the pedal LOCKING. SERVICE STOPLIGHT (ONLY) BUTTON SERVICE Z BLACKOUT RA PD 64586 Figure 26—Main Light Switch Operating Positions | disengages the engine from the transmission so that transmission gears may be shifted. Releasing the pedal engages the clutch and connects the engine and transmission gears. | s. Brake Pedal. The brake pedal is the pedal to the right of the | steering column in the driver’s compartment. Press pedal down to apply the service brakes, Releasing pressure on the pedal releases | the brakes as the pedal returns to normal position. t. Parking Brake Lever. The parking brake lever is located to the right and rear of the transmission gearshift lever. To operate the parking brake, pull back on the lever and a spring-loaded catch will lock the lever in applied position. To release, depress button on top of lever releasing the latch, and push lever forward as far as possible. Only apply this brake after vehicle has come to a dead stop. u. Power Take-off Shift Lever. The power take-off lever is the lever at the rear left-hand side of the center floor plate. It has three positions. When pushed forward, it operates the winch in reverse; 27T™ 9-710 5-6 BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) when pulled rearward, it operates the winch in forward speed; and setting the lever in the middle position places it in neutral. The clutch is depressed before shifting the power take-off lever into the desired position and releasing the clutch puts the winch in operation. Speed of operation is controlled by speed of the engine through the foot pedal accelerator. y. Accelerator Pedal. The accelerator pedal is located in the driver’s compartment on the toe plate to the right of the brake ‘STARTER BUTTON RA PD 314004 Figure 27—Starter Button Caution Plate pedal. Engine and vehicle speed are controlled by this pedal, which is linked to the carburetor throttle. 6. OPERATION OF THE VEHICLE. a. Starting the Engine. (1) Make Berore-oPERATION INspECTION. Refer to paragraph 18, Preventive Maintenance, Section VI. (2) Srartine THE ENcIne. Apply the hand brake by pulling back on lever. Place the transmission shift lever in neutral position. Pull choke button out about half-way and pull hand throttle button out one-quarter inch. (If engine is warm these two steps will not be necessary). Move ignition switch lever to left to turn on ignition. 28T™ 9-710 6 DRIVING CONTROLS: AND OPERATION Depress clutch pedal disengaging the clutch.-Press the starter button on instrument panel and crank the engine. Release pressure on starter: button the instant the engine starts. Adjust throttle and choke until engine attains even idling speed. Release clutch pedal slowly. (3) Instrument Reapines. Before operating the vehicle, check the instruments on the instrument panel for the following readings: (a) Tachometer. The idling speed is approximately 400 revolu- tions per minute. (b) Electric Brake Control. If towing a trailer, set this dial to the proper braking power indication. : (c) . Ammeter. This should show a “positive” (++) reading. (d) Fuel Gage. Take a reading of both tanks (using toggle switch) to assure a sufficient fuel supply. : o Oo CAN BE OUT WITH © RA PD 24077 Figure 28—Gearshift Diagram (e) Engine Temperature Gage. This should show .a slow in- crease in temperature until the engine warms up, then it should show a maximum reading of 180°F. (f) ° Oil Pressure Gage. This gage should show a reading of four to eight pounds, with engine idling, and a maximum pressure of 20 to 35 pounds with engine running at operating speed. (6) Voltmeter. Press in switch button below the gage. The read- ing with engine stopped and no load on battery should be approxi- mately 12 to 14 volts. b. Driving the Vehicle. (1) SurrtTine into Low Gear (fig. 28.) After engine has been started and checked for’ satisfactory performance, depress the clutch pedal and move the transmission lever from neutral position to the left and then forward, placing the transmission gears in (first gear) “LOW.” If-it is to be a level start under no great load,-and solid underfoot, pull the transfer case shift lever to the rear, placing the 29ene ee re as 6 BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND 1 transfer case in “HIGH” range. NOTE: If these conditions are versed and the start is to be made under difficulties, push the transft case lever forward into “LOW” and engage the front axle drive by ing its lever forward to engaged position. (2) PurttTinc VEHICLE IN Motion, Release the parking b: by depressing the button on top of the handle, and push. the tend forward as far as possible. Release the clutch pedal slowly, and the same time, press the accelerator pedal the amount necessary overcome the load and put the vehicle in motion. TOW CABLE RA PD 31 Figure 29—Hook-up of Towing Cable on Front of Vehicle (3) SHIFTING To HicHER Gears (fig. 28). As the vehicle g: speed, release the accelerator pedal, and push the clutch pedal at the same time. Pull the transmission shift lever straight back engage the “second” gear. Release the clutch and push down accelerator as before, until the speed of the vehicle has increa enough for the next shift. Repeat the operation of releasing and into neutral; then shove it forward and to the right into gear. Release the clutch and pick up more speed in “third”, repeat the operation of releasing the accelerator and depressing clutch, Now pull the shift lever straight back and engage the “fo or “HIGH” gear; release the clutch pedal and control the speed the vehicle with the accelerator. ¢. Double Clutching. To shift the transmission gears smooth it is sometimes necessary to “double clutch.” Push down the clutTM: 9-710 67 DRIVING. CONTROLS AND OPERATION pedal disengaging the clutch, shift the transmission lever to neutral position and release the clutch pedal. Push down clutch pedal. Reg- ulate engine speed with accelerator to equal new transmission speed. Shift transmission lever to gear selected. Release clutch slowly. a. Shifting-ihe Transmission into Reverse (fig. 28). Disengage the clutch and bring vehicle to a full stop. Move transmission shift lever into neutral, then to the right as far as possible, and rearward into “REVERSE” position. Release clutch pedal, and. accelerate engine at the same time, and. in the same manner, as when starting vehicle forward, e. Stopping the Vehicle. Release the accelerator pedal and apply the brakes by slowly pushing in the brake pedal. When forward speed of the vehicle has decreased’ to about the idling speed of the engine, push in the clutch pedal. When the vehicle has been brought to a complete stop, shift the: transmission into neutral, release the clutch pedal, and pull the hand brake as far rearward as possible. f. Stopping the Engine. Turn the ignition switch to the right or “OFF” position, after completing instructions on stopping the ve- hicle. 7. TOWING THE VEHICLE. a, Towing to Start-Vehiele (fig. 29)..To start the engine by towing, place the transfer case in high range and the transmission in fourth or high gear. Disengage the front axle. Disengage the clutch by holding foot pedal down, Adjust choke and throttle to suit cli- matic condition, After vehicle has gained ‘speed, turn on the ignition switch and engage the clutch slowly. As soon as the engine is running smoothly, shift transmission into neutral and. signal towing vehicle to stop. b. ‘Towing Disabled Vehicle. Towing of a disabled vehicle will depend upon the damage to the vehicle, If the wheels and tracks are not disabled, the vehicle can be towed by a connection made to one of the tow hooks on. the front end of the vehicle, or to the rear pintle hook. In case either of the ends remains undamaged, the damaged end can be raised with a conventional towing hoist and the vehicle towed to a repair’station. Place the towed vehicle in neutral with all drives disengaged. If the wheels or tracks cannot be used to sup- port one end of the vehicle, special recovery equipment will have to be procured. 31T™ 9-710 = 8-9 BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) — Section IV AUXILIARY EQUIPMENT CONTROLS AND OPERATIO! Poragrapl Winch controls... . ; Winch cable operation. 8 WINCH CONTROLS. a. Drum Clutch Control. A lever for engaging or disengaging th drum clutch by hand, is located on the clutch end of the winch (fig. 30). When this clutch is disengaged, the drum turns freely on drum shaft, being retarded only by the drag brake. CAUTION: Do not disenga the drum clutch while winch is under load. Before using power on winch, determine that winch clutch is locked “IN” securely. SLIDING CLUTCH WINCH DRUM — CABLE DRUM FLANGE DRAG BRAKE SPRING EYE BOLT & JAM NUTS SPRING HAND LEVER Figure 30—Winch Drum Clutch Control b, Power Take-off Control. The lever for shifting the power take-off and operating the winch is the first one on the driver's right- ! hand side. The lever is held in neutral position by a hinged lock on the floor of the cab. Raise this lock before attempting to operate the lever. To unwind the winch cable, push the lever forward. To wind the cable, pull the lever to the rear of neutral position. 9, WINCH CABLE OPERATION (fig. 31). 7 a. To Hook On. Disengage drum clutch and pull off required ~ amount of cable. If winch is under load, reverse power take-off and run winch until load-pressure is released. NOTE: The winch cable must™ 9-710 9 AUXILIARY EQUIPMENT CONTROLS AND OPERATION Ny CAPACITY _OF WINCH 10,000 LBS. AY) LINE SPEEDS REQUIRE THAT WHEN THE WINCH IS USED TO ASSIST THIS VEHICLE WITH WHEELS DRIVING, THE POWER TAKE-OFF SHOULD BE IN FORWARD SPEED, TRANSMISSION IN FIRST GEAR WITH TRANSFER CASE IN LOW RA\ £ VEHICLE AND WINCH GUARANTEE REQUIRE THAT THE WINCH SHALL BE OPERATED AT ALL TIMES AS » ise TL iso) ie alad soleil tc ee by es i RA PD 314007 Figure 31—Caution Plate on Winch Operation not be wrapped around the load, with the hook around the cable, as this will damage cable. b. To Pull. Engage drum clutch securely, push down clutch pedal, shift power take-off into forward position, then slowly release truck clutch pedal. Control speed of winch by operation of engine accelerator pedal or hand throttle control. ce. To Stop Winch. Push down clutch pedal and shift power take- off into neutral, Load will be held by the winch automatic worm brake. d. To Release Load. Push down clutch pedal, shift power take-off into reverse, and run out just enough cable to give a little slack. Push im clutch pedal and shift power take-off into neutral. e. To Rewind Cable. Reel cable on drum in the same manner as making a pull. Keep a slight tension on the cable, to assure tight wrap- ping. Make the first layer of cable winding trim and “close wrapped,” tapping the strands in, tightly, with a wood block.™M-9-710 ‘0 BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) Section V OPERATION UNDER UNUSUAL’ CONDITIONS Extreme haat .-.. Extreme. cold Sandy terrain ...... Fording streams; or flood exiditee, Muddy terrain or deep snow. Rough terrain: . Gas contaminated areas 10. EXTREME HEAT. a. Cooling System. (1) Make certairi the system is clean and free flowing. 2)" Keep the water. lével as high as possible i in the radiator tank. (3) “Adjust the fan belts to proper tension of 34-inch deflection. (4) _ If the engine becomes overheated from lack of water, allow it to cool before adding water. (S)_ Keep the radiator fins free of foreign materials, such as insects, leaves, and dirt. . (6): Use'only clean, clear water to fill radiator. NOTE: Do not_use salt, or mineral water, solutions in the system, b. Engine Care. (1) . Use orily the crankcase oil viscosities recommended in the Lubrication Guide for temperatures encountered. (2) Inspect exhaust pipe and service if partially closed, (3) Keep engine clean; Accumulations of dust and oil form an insulation against cooling air supplied by the fan. (4) . Keep all mountings, cylinder head inuts, and connections tight. ce. : Electrical System Care. . (1) Batrertes. Never’ allow batteries to become. overheated. Guard against this in extreme heat conditions by opening the battery box while in operation allowing air to circulate around the batteries. Top connectors should not feel hot to the touch. If battery feels warm, turn on the lights to cut down charging rate to battery. This is particu: larly necessary on long runs. (2) Wirinc System. Inspect carefully to'detect any bare wire or other possibilities of short circuit. (3) Ienrrion, (a) ‘Check ignition timing occasionally, and adjust to avoid over- héating due to incorrect timing. (5) -Examine distributor for proper operation of centrifugal advance, proper condition, and adjustment of distributor points. | ‘(c) Check spark plugs and adjust to proper gap, 0.025 inch, © 34TM 9-710 10-11 OPERATION UNDER UNUSUAL CONDITIONS (4) Fue Syste. Keep the air cleaner and its tube, connecting to the carburetor intake, as clean as possible. d, Clutch, Keep the clutch in proper adjustment, to avoid clutch slippage, and racing of the engine without effective power to the driving axles. e. Transmission, Transfer Case, and Driving Axles. (1) Keep all vent holes clean and free. (2) Examine housings for cracks and leaks. (3). Make certain that proper lubricants, in proper quantities, are in the units (see Lubrication Guide). 11. EXTREME COLD. a. General.” (1) Operation of automotive equipment’ at subzero temperatures presents problems that demand special precautions and careful servic- ing from both operation and. maintenance personnel, if. poor perform- ance and total functional failure are to be avoided. The instructions given herein apply only at temperatures ranging between 0°F and —40°F. Automotive equipment can be operated efficiently at low temperatures if the instructions in this paragraph are observed. (2) Extreme care must be exercised whenever a vehicle or part is moved from a warm place into subzero temperature, as moisture will immediately condense upon all surfaces, and freeze there. (3) Lubrication of automotive equipment at temperatures above O°F is covered by Lubrication Guides and applicable Ordnance Field Service Bulletins. The lubrication instructions contained in this para- graph will be followed only when temperatures below 0°F prevail. Subzero temperatures: affect both metals and lubricants. ‘Therefore, special attention must be given to lubrication and servicing of equip- ment when such temperatures are encountered. b. Gasoline for Low Temperatures. (1) Winter grade gasoline is designed to reduce cold weather starting difficulties; therefore the winter grade motor fuels procured under U. S. Army Specification 2-103, latest issue, will be used. @) Due to condensation of moisture in the air, water will accumu- Jaté in tanks and containers, At low temperatures, this water will form ice crystals that will clog fuel lines and carburetor jets unless the following precautions are taken: (a) Strain the fuel through a chamois skin, or other type of strainer, that will prevent the passage of water. CAUTION: Gasoline flowing over a surface generates static electricity that-will result in a spark, unless some means is provided to ground the electricity. A metallic contact, between the container and the tank, must be provided to assure an effective ¥round. “ (b) Keep tank full, if possible. The more fuel there“is in the tank, the smaller will be the volume of air from which moisture can be con- densed. 35™ 9-710 VW BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) (c) Besure that all-containers are re thoroughly clean and free from rust before storing fuel in the: (d) "If possible, after filling or moving a container, allow-the fuel to settle before’ filling vehicle tank from it. (e) Keep all closures of containers tightly covered to prevent snow, ice, dirt, and other foreign matter from entering. c. Lubrication of Engines Equipped with Winterization Kits. Special winterization kits are prepared for all vehicles, When these kits ate available, the following instructions for preparation and starting of engines will apply. NOTE: If kits are not installed, see subparagraph d below for engine instructioris. Instructions on all other parts of vehicle which follow apply whether kits are used or not. (1) VEHICLES wiTH SHkouDS AND HEATERS, When Shrouds and heaters are-supplied, no engine oil dilution is necessary. For short shut- down periods, the vehicle should be parked in a sheltered spot, out of the wind if possible. If. no shelter is available, park so that the vehicle does not face the wind. For long periods of shut-down, as in bivouac, park vehicle in as sheltered a place as possible. If built-in engine heater is supplied, drop bottom cover of heater. Make sure valve’ in gasoline supply line is open to heater, Open lighter hole in base of heater. Remove lighter tool from clip on side of heater, soak lighter tool with _ gasoline, ignite, and insert lighter tool in hole, lighting heater. Close lighter hole. If built-in heater is not supplied, connect standby heater-to fuel supply. Hang heater from chassis under engine, or stand on ground under engine and level with leveling screws in legs, within 10 degrees of absolute level. Do not stand heater on snow. Light heater! Heater should burn with a blue flame in still air. Keep heater free of ice, and strainers clear. Change adjustment of heater only as last resort, and then, with extreme caution. Be sure all electrical equipment is turned off. Use windshield defrosters only when engine is running. Erect shroud over engine, and weight down at edges with stones or snow. Make shroud as tight as possible to keep out wind, but allow for air necessary for combustion of heater fuel. To start vehicles with built-in heaters, close bottom cover of heater. This will extinguish the heater. Leave gasoline supply valve open for other equipment. Forty-five minutes before it is intended to start, turn on battery heater. When start is to be made, turn off battery heater. Pull choke out % to full. Do not manipu- late choke until engine is running, and then with caution. Disengage clutch and operate cranking motor. After engine has started, it must be. allowed to idle until cooling system temperature begins to rise. Check battery warming coil for leaks. Regulate engine temperature by use of shutters on radiators. Remove shroud, engine heater, and battery heater, and stow. (2) VeHIcLESs WITHOUT SHROUDS AND HEATERS. In order to assure ‘starting at subzero temperatures when no shrouds and heaters are pro- vided, vehicles must be prepared for operation. Park vehicle in as sheltered a spot as possible and not facing the wind. Stop engine and check oil level in crankcase. If below “FULL,” bring up to level with engine oil, crankcase grade. Start engine and, with engine idling, dilute crankcase oil. Lower dilution valve to fill diluting measure attached to 36TM 9-710 VW OPERATION UNDER UNUSUAL CONDITIONS enginé, Raise dilution valve to allow fuel to run into érankcase, Repeat once with full diluting measure, and once with half full measure. Note level of lubricant on dipstick after allowing engine to idle 10 to 15 minutes to mix diluent and lubricant, After each day’s operation, check level of lubricant in crankcase. If below “FULL” mark, bring up to level with engine oil, crankcase grade, and then dilute. If above full mark, excess will indicate dilution remaining. Add dilution in required pro- portion to bring level to that encountered after initial dilution. ‘d. Lubrication of Engines Not Equipped with Special Wintcr- ization Kits, Several methods for keeping crankcase oil sufficiently fluid for proper lubrication are listed below. Preference should be given to the different methods in the order listed, according to the facilities available. . (1) Keep the vehicle in a heated inclosure when it is not being operated, (2) When the engine has stopped, drain the crankcase oil while it is hot and store in a warm place until the vehicle is to be operated again. If warm storage is not available, heat the oil before reinstalling. Do not get the oil too hot; heat only to the point where the bare hand can be inserted without burning, Tag the vehicle in a conspicuous place in the cab to warn personnel that the crankcase is empty. (3) If the vehicle is to be kept out-of-doors and if the crankcase cannot be drained, cover the engine with a tarpaulin. About 3 hours before the engine is to be started, place fire pots under the tarpaulin. A Van Prag, Primus-type, or other type blow-torch or ordinary kerosene lanterns may be used. With due consideration’ for the fire hazard involved, the flame may be applied directly to the oil pan. (4) Dilute the crankcase oil with gasoline. The following dilutions will form mixtures for satisfactory starting at the temperature indicated : 0°F to —20°F Below —20°F Ya qt to each 412 qt engine oil 1 qt to each 5 qt engine oil (5) When crankcase oils are first diluted, run the engine 2,to'3 minutes at moderate speed to mix oil'and diluent. If the vehicle is oper- ated 4 hours or more at operating temperature, and if it is anticipated that the vehicle will be left standing unprotected for three hours or more, redilution will be necessary. . - _ (6) The presence of a large percentage of light diluent will increase coil consumption, and for this reason, oil level should be checked fre- quently. . - e. Transmission, Differentials, and Transfer Case. ie (1) Universal gear lubricant, SAE 80, is suitable for use at tempera. tures as low as —20°F. For lower temperatures, universal gear lubri- cant, SAE 80, diluted with the-fuel used by the engine in the proportion of one part fuel to six parts universal gear lubricant, must be used. When temperatures below —20°F are anticipated, drain transmission imme- diately after use, while lubricant is still warm, Refill to proper level with universal gear lubricant, SAE 80; diluted as noted above. After standing overnight at subzero temperatures, warm up transmission as follows: (a) Warm up engine as provided in subparagraph ¢ (1) above. 37T™ 9-710 11. BASIC HALF-1 ‘TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) (b) Engage. clutch and maintain engine speed at fast idle for five minutes or, until gears can be engaged. Put transmission in low (ist) gear arid drive vehicle for 100 yards, being careful not to stall engine. f. Chassis Lubricants. (1) Track SusPEnston, Rear TRACK IDLER. AND SUPPORT-BEAR- INGS.’ Bogie wheels and track roller. bearings must be removed, 'and washed in dry-cleaning sdlvent or Diesel fuel, and reassembled. Lubri- cate, with engine oil, SAE 30. If removal of bearings and washing are impractical, bearings may be lubricated by forcing in engine oil, SAE 30, immediately after vehicle has been driven and when bearings are warm, forcing out the general purpose grease. used above 0°F. (2) “Drivinc SpRocKET, WHEEL BEARINGS; AND GREASE Cups. Driving. sprocket wheel bearings, and grease’ cups calling for general purpose grease, No. 2, must be lubricated. with general purpose grease, No. 2, at-all times. If repacking must be performed at such low temper- atures that hand packing cannot be accomplished, grease, OD No. 00, may be used. (3), Untversat Joints ‘AN Sip Joints. Universal joints and slip joints must be lubricated with grease, OD No. 00." ; (4). Cuassts Ponts. Chassis points must be lubricated with engine oil, SAE 30. CAUTION: When temperatures below 0°F aré no longer anticipated, the above bearings must be lubricated inimediately with proper seasonal grade lubricant. (5) -Hyprovac, Cvuinpers. Lubricate hydrovac, cylinders with hydraulic ‘oil, §-’ Protection of Cooling System. _()_ “Ethylene Glycol is prescribed for use as an antifreeze soliition in vehicle radiators. (2) The following table. gives the approximate quantity of anti- fieeze necessary for various temperature conditions; however; check with an antifreeze solution hydrometer. Antifreeze Chart ‘Tempera- 3 i . ture F +10 0 --10. +20 —30 bao —s50 —60 —70 ‘Antifreeze’ Compound, (ethylene glycol” * type. 4 Paaiay oi BY, 9%. TIA 13 14% 14% 16% 16%. . (3). Precautions to be taken before installing the antifreeze: (a) Thoroughly flush the cooling system, | (b) Check the system. for leaks; tighten the hosé connections and replace if necessary; chéck the thermostat and water pump. (c) Check'the fan'belts for adjustment or weakness. Do not use rubber fan belts at temperatures below —20°F. Use leather, fiber, or synthetic rubber fan belts. 38TM 9-710 W OPERATION UNDER UNUSUAL CONDITIONS. h. Protection of Electrical System. (1) GENERATOR AND CRANKING Motor. Check the’ brushes, com: mutators, and bearings. See that the commutators are clean. The large surges of current which occur when starting a cold motor require good contact between brushes and commutators. (2) Wirinc. Check and clean all connections, especially the bat- tery terminals. Care'should be taken that no short circuits are present. (3) , Cort. Check coil for proper functioning. (4) _Disrrreutor. Clean thoroughly, and clean or replace: “points. Check the points frequently. In cold weather, slightly pitted points can .Prevent engine from starting. (5) SPARK Puss. Clean, test, and replace, if necessary. If it is difficult to make the engine fire, reduce the gap 0.005 inch less than that recommended by the manufacturer, This will make ignition more effective at the reduced voltages likely to prevail. (6) ‘Timmne. Check timing carefully. Care should be taken that the spark is not unduly advanced or retarded. (7) BatrTEris. (a) ‘The efficiency of batteries decreases sharply with decreasing temperatures, and becomes practically nil-at.—40°F. Do not try to start the engine with the battery when it has been chilled to tempera- tures below —-30°F until battery has been heated. See that the battery is always fully charged, with the hydrometer reading between 1.275 and 1.300. A fully ‘charged battery will not freeze at temperatures likely to be encountered even in arctic climates, but a fully discharged battery will freeze and rupture at 18°F. (b) Maintain electrolyte levél 4 inch above top of plates, using distilled water. (c) Do not add water to batteries when they havé been exposed to subzero temperatures, unless the battery is to be charged immediately afterward, If water is added and the battery not put on charge, the layer of water will stay at the top and freeze before it gets a chance to mix, with the acid. Keep vent holes in filler plugs open. Keep terminals tight and clean. Apply a coating of PETROLATUM or GREASE, general purpose No. 0. (8) | Licuts.” Inspect the lights carefully. Check for short circuits and presence of moisture around sockets. (9) Before each start, see that the spark plugs, wiring, and other electrical equipment are free from ice. . i. General Conditions. (1) Be sure that no heavy grease or dirt has been left on the crank- ing motor throw-out mechanism. Heavy grease or dirt may keep the gears from.meshing’or cause them to remain in mesh after. the engine starts running. The latter will ruin the cranking motor and necessitate repairs. (2) » A full choke is necessary to secure the air-fuel ratio required for cold weather starting. Check the butterfly valve to see that it closes all the way and otherwise functions properly. ° 39TM. 9-710 11-12 BASIC HALF-TRACK VEHICLES. (WHITE, AUTOCAR, and DIAMOND 7) (3). Carburetors which give no appreciable trouble at normal tem- peratures may not operate satisfactorily at low temperatures. A fuel pump which will deliver enough gasoline at normal starting speeds of 500 revolutions per minute may have leaky valves or a diaphragm which will prevent delivering a sufficient quantity of fuel which, at the reduced temperature, will produce sufficient vapor to fire when turning at speeds of 30 to 60 revolutions per minute. Another source of trouble is the float needle valve which, although a close fit, must. move freely. Different expansions of the metals used in the needle valve parts, may cause the needle valve to stick at extremely low temperatures. (4) At temperatures below 0°F do not use oil in air cleaners, The oil will congeal and prevent the easy flow of air. At temperatures below 0°F, wash screens in dry-cleaning solvent, dry and replace. Ice and frost formations on the air cleaner screens may cause an abnormally high intake vacuum in the carburetor air horn hose, resulting in collapse. (5) Full flow oil filters have a bypass valve, Below —30°F these filters must be bypassed, because the viscous oil will not flow freely through them. Other filters (Bypass type) require no special attention. (6) Remove and clean fuel system sediment bulb, strainers, etc., daily. Also drain fuel tank pump daily to remove water and dirt. (7) Brake bands, particularly on new vehicles, have a tendency, to bind when’they are very cold. Always have a blow-torch handy to warm up these parts if they bind prior to moving, or attempting to move, the vehicle. Parking the vehicle with the brake released will eliminate most of the binding. Precaution must be taken, under these circumstances, to block the wheels or otherwise prevent movement of the vehicle. (8) Inspect the vehicle frequently. Shock resistance of metals, or resistance.against breaking, .is greatly reduced at extremely low tem- peratures, Operation of vehicles on hard, frozen ground causes strain and jolting, which will result in ‘screws breaking or nuts jarring loose. (9) Disconnect oil-lubricated speedometer cables at the drive end when operating vehicles at temperatures of —30°F and below. These cables often fail to work properly at these temperatures, and sometimes, break due to the excessive drag caused by the high viscosity of the oil with which they are lubricated. ___j._ ‘Lubricants. For correct lubricants, refer to Product Guide, OFSB 6-2, latest issue. k. Cold Weather Accessories, All necessary cold weather acces- sories are included in the cold’ weather starting kits being prepared for vehicles in cold climates (OFSB 6-11). 12, SANDY TERRAIN. a. Air Filters and Protective Measures. (1) -In sand-storm operation, tie a single layer of medium fine knit cotton cloth, such a8 undershirt cloth, loosely over the oil breather holes to prevent grit from entering the crankcase. 40™ 9-710 12-13, OPERATION UNDER UNUSUAL CONDITIONS (2)._ Using medium fine knit cotton cloth, form a loose bag over the entire air cleaner units for the engine and the hydrovac cylinder. Con- stant close supervision and daily inspection of the air filters ate the only ways of insuring that sand will not get into the engine. ” (3) Wipe all sand and dust off the caps of the crankcase and fuel tanks, and the spouts ofthe gasoline and oil containers, before using these units. (4) Seal the instrument panel with masking tape to keep the dust from entering the instruments and causing their failure. (5) Canvas boots for the distributor and front wheel joints help Keep sand and grit from fouling these joints. (6) Vehicles must be cleaned and lubricated more frequently when“operating in sandy or desert terrain. b. Tires. = (1) _ Operations in the desert will require movement over all types of terrain. Tires must be suitable for every type of surface which will be encountered. Most difficulty will be met in sand, Air pressure must be varied to suit the type of ground surface, Over sand or soft powdered clay, reduce the ground pressure per square inch by deflating the tires. The area of the tire in contact with the ground is thus increased, and the tire fits itself to the irregularities of the sand without breaking through the crust. The minimum pressure must be determined by test for each type of vehicle. NOTE: Tires on flat base rims will spin on. the rims if pressure is too tow, 13. FORDING STREAMS, OR FLOOD CONDITIONS. é a. Flood Maintenance. After fording shallow streams it is usually unnecessary to take any preventive maintenance steps. However, if the units have been submerged for several hours or more, because of fording deep streams or being in a flood area, it is necessary to remove all foreign matter that may have accumulated. This is done by dismantling the-units submerged, washing each part in dry-cleaning solvent, and spreading a thin film of oil over the parts. In instances when emergency requirements make an immediate complete cleaning impossible, some damage may be prevented and the vehicle kept in service by the following procedure: (1) - Bocte SusPENsION. Remove bogie roller bearings, and clean and repack completely with recommended lubricant, and reassemble. Always replace grease retainers at roller hubs with new ones, since old, gritty retainers, if replaced, may damage or cut away the seat, and cause leakage. (2) Brake System. Remove the brake drums, and wipe the linings and anchor pins clean, Lubricate the pins. Drain the brake lines, flush the systern with alcohol, and refill with new brake fluid. (3) Coo.inG SysTem. If any grit-or dirty water has seeped into the cooling system, drain out the liquid, then flush the system thor- oughly, and refill with clean liquid. Clean the outside of the radiator case. (4) Exectric Licutinc SysteM, BATTERY, AND ACCESSORIES. Wipe all wires and contact points clean and dry. Clean the battery ter- 41T™M_9-710 13-15 BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) minals and check the battery for signs of discharging because of short circuiting by the water or other. foreign matter: Recharge’ battery, if- necessary. (3) Fue Svsrem. If any part of the fuel system has been sub- merged, drain and flush the system thoroughly, and refill with gasoline, using one-half pint-of alcohol to each tankful of fuel to counteract the effect of the water. If any grit gets into the carburetor, it may be neces- sary’ to remove’ the carburetor.and clean the jets and needle- valve, NOTE: In case the carburetor must be disassembled, refer to a higher “echelon. (6) “GENERAL. Lubricate the steering gear - and alll pedals, shafts, and linkages beneath the hood; and or the chassis. NOTE:~At the first opportune tine, completely disassemble each unit and clean thor- oughly. 14..° MUDDY - ‘TERRAIN OR ‘DEEP SNOW. a. Donothavethe front wheels in a crarhped position when starting to move the vehicle, and avoid making-sharp turns. ~ b. | When-traction is impossible, utilize the winch and winch wale, if's0 equipped; to pull the yehicle to more solid round, ‘This operation may be accomplished, as follows: ! . (1). Utilize any stationary, solid object as an anchor. This' may be a, large tree, another vehicle, or’ similar_materials. (2) “Secure an anchor chain and pulley to this object; preferably thitty. or forty feet behind the vehicle. Attach to this any: standard ‘pulley block- of proper size, "" (3) Uriwind the winch able from thé drum, ‘passing it through the pulley block and returning it to the front of the vehicle where :the hook should be fastened through the tow hook. (4) “Operation of :the’ winch from inside of cab:can then ‘be utilized to pull the mired. véhicle to more’ solid ground.: * ¢, . When starting on slippery or icy roads, it is advisable to start the vehicle in secorid or third’speeds. with the engine running slowly until traction is secured. This, operation in second or third speed gives a‘greater initial thrust at’ the contact point with the oad surface, “and offers, less possibility of spinning, 15. “ROUGH ‘TERRAIN. Tires. In rocky or ‘boulder-strewn ground, tires must be as fully inflated as the’ age and condition of the tires pérmit. CAU- ‘TION: At low pressure the innermost layer of canvas-will be broken by. the violent inward bending when a sharp rock is struck. The resulting chating will wear out the.inner tube even though no danger is apparent from the dutside of the tire. b..- Electrical Difficulties. The -constant. shock. and vibration éaused by’ the passage over rough ground: frequently causes cable clips to shake loose, and cables .are broken or shorted. Frequent inspection of cable clips should. be, made, and-spring washers in- serted under, the nuts, if possible. Voltage’ control units may’ cause 42™ 9-710 15-16 OPERATION UNDER UNUSUAL CONDITIONS troubie because of breaking of wire in shunt-winding or’ sticking of regulator points. Drivers should watch the ammeter as carefully as any other instrument since overcharging, even when not sufficient to buckle the plates, always results in loss of battery water, most difficult to obtain in the desert. The high saline content of watér issued for drinking and for radiators forbids its use in batteries, ~ ec. Loading. The vehicle must be carefully loaded. Excessive breaking of springs has been a constant source of trouble in the vehicles used in the desert. The rough going is very hard on springs arid they are quickly broken by- overloading, improper distribution of load, or shifting of load while.moving. 16, GAS CONTAMINATED AREAS. a, For complete information on ‘decontamination see Armored Force Field Manual, FM 17-59. 43T™ 9-710 7 BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) Section VI INSPECTION AND PREVENTIVE MAINTENANCE SERVICES Paragraph Purpose 17 Before-operation service. 18 During-operation service... 19 At-halt service 20 After-operation and weekly service 21 17.. PURPOSE. a. To insure mechanical efficiency, it is necessary that the vehicle be systematically inspected at intervals each day it is operated and weekly, so. defects may be discovered and corrected before they re- sult in serious damage or failure. Certain scheduled maintenance services will be performed at these designated intervals. The services set forth in this section are those performed by driver or crew, before operation, during operation, at halt, and after operation and weekly, 4 b, Driver Preventive Maintenance Services are listed on the back of “Driver's Trip Ticket” and Preventive Maintenance Service: Rec- ord W.D..Form No. 48 to cover vehicles.of all types and models. Items peculiar to specific vehicles, but not listed on W.D. Form No. 48, are covered in manual procedures under the items to which they ‘pertain. Certain items listed on the form that do not pertain to the vehicle involved are eliminated from the procedures as written into the manual. Every organization must thoroughly school each driver in performing the maintenance procedures set forth in manuals whether they are listed specifically on W.D. Form No. 48 or not. e. The items listed on WD. Form No. 48 that apply to this vehicle are expanded in this manual’ to provide specific procedures for ac- complishment of the inspections and services. These services are arranged to facilitate inspection and conserve the time of the driver and are not necessarily in the same numerical order as shown on WD. Form No. 48. The item numbers, however, are identical with those shown on that form. , 4, ‘The general inspection of each item applies also to any support- ing member or connection, and generally includes a check to see whether or not the item is in good condition, correctly assembled, secure, or excessively worn. e. The inspection for “good condition” is usually an external visual inspection to determine whether or not the unit is damaged beyond safe or serviceable limits. The tetm good condition is explained further by the following terms: not bent or twisted, not chafed or burned, not broken or cracked, not bare or frayed, not dented or collapsed, not torn or ‘cut. a417-18 INSPECTION AND PREVENTIVE -MAINTENANCE SERVICES. f. The inspection of a unit to see that it is “correctly assembled” is usually an external visual inspection to see whether or not it is in its normal assembled position in the vehicle. @: The inspection of a unit to determine if it is “secure” is usually an external visual examination, a hand feel, or a pry-bar check for looseness. Such an inspection shguld include any brackets, lock washers, lock nuts, locking wires, or cotter pins used in assembly. h. “Excessively worn”. will be understood to mean worn close-to, or beyond, serviceable limits, and likely to result in a faiture if not replaced before the next scheduled inspection. i: Any defects or unsatisfactory operating characteristics beyond the scope of first echelon to correct must be reported at the earliest opportunity to the designated individual in authority. 18. BEFORE-OPERATION SERVICE. a. This inspection schedule is designed primarily as a check to see that the vehicle has not been tampered with, or sabotaged, since the “After-operation Service” was performed, Various combat conditions may have rendered the vehicle unsafe for operation and it is the duty of the driver to determine whether or not the vehicle is in con- dition to carry out any mission to which-it may be assigned. This operation will not be entirely omitted, even in extreme tactical situa- tions. b. Procedures. Before-operation Service consists of inspecting items listed below according to the procedure described, and cor- recting or reporting any deficiencies. Upon completion of the service, results should be reported Promptly to the designated individual in authority. (1): Trem 1, Tampenive aND“Damace. Look for any injury to vehicle in general, its accessories or equipment which may have been caused by tampering or sabotage, collision, falling debris, or shell fire, since vehicle was parked, Look under hood for signs of tampering or sabotage, such as loosened or damaged accessories, lines, or linkage, (2) Trem 2, Fire ExrincuisHer. Inspect fire extinguisher for corrosion, full charge, clogged nozzle, and secure mounting. (3) Irem 3, Fuet, Or, ap WareR. Check for leaks and tam- pering. Add -fuel, oil, or water as needed. Report unusual losses. Have value of antifreeze checked if; during period when antifreeze is used, it becomes necessary to replenish a considerable amount of water. (4) Trem 4, Accessories ans Drives. Examine carburetor, gen- erator, regulator, cranking motor, and water pump for loose connec- tions or leaks, and security of mountings. Inspect fan belts for 34-inch deflection. (5) Trem 6, Leaks, GENERAL. Look on ground under vehicle for indications of fuel,-oil, water, brake fluid, or gear oil leaks, Trace leaks to source, and correct, or report. (6) ITEM 7, ENGINE WARM-UP. Start engine, observe cranking motor action, listen for unustial noise and adequate cranking speed. 45™ 9-710 18 BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) CAUTION: Do not re-press starter button until engine comes to com- pleté rest (approximately 5 seconds) if. not started on first attenipt. Idle engine fast enough.to run smoothly, (400 to-450 rpm). Proceed immediately with following services while vehicle is warming up. . (7) Trem 8, CHoxe. As‘engine warms, push in choke as required for smooth operation. (8) IveM 9, INSTRUMENTS. Inspect instruments during warm-up for following indications: Aa) Fuel Gage, Fuel gage must show approximate amount of fuel in tanks according to position of toggle switch. (4) Oil Pressure Gage. At normal vehicle operation speeds, pres- sure should be about 20 to 35 pounds. Pressure should not fall below, 4 pounds at idle. If proper oil pressure is not indicated, within 30 sec- onds, stop engine and report. . _'(c) Temperature Indicator. Temperature should rise slowly duz- ing warm-up. Normal operating temperature 155°F to 185°F. CAU- TION: Do not operate engine over 2,000 revolutions per minute until cooling system temperature has reached 160°F. (d) Ammeter, Ammeter should show a high charge for stort period after starting, and a zero or positive (+) reading above 12 to 15 miles per hour with lights and accessories “off.” A zero reading with lights and accessories “on” is normal. (e) Véltmeter. Voltmeter, if vehicle is so equipped, should show a reading of not less than 12 volts, with engine stopped and no load on battery. An excessive drop (more than 2 or 3 volts under heavy load) will indicate battery or connection faults. (f) Tachometer: Tachometer must indicate engine speed without excessive fluctuation.or unusual noise. (9) ITEM 10, HoRN AND WINDSHIELD Wipers. Sound horn, tactical situation permitting. Check both wipers for secure attachment, effec: ‘tive operation, and full blade contact through full stroke, (10) Trem’ 11, Grass aNp,REAR View Mirrors. Clean glass and inspect for cracks, discoloration, or breakage. (11) Ive’ 12,,LicHTs. Try switches in each position and see if lamps respond, Inspect lights for good condition ‘and secure mount- ing. Clean lenses. (12) Ire, 13, WHEEL AND FLANGE Nurs. Observe for presence of wheel and’ flange nuts and tighten as needed. - (13) rem 14, Tires anp. Tracks, Test tires with gage, if time permits. Normal pressure for combat tires is 55 pounds, tires cold. Make sure that valve caps are in place. Remove embedded objects from tire treads and rubber tracks. Inspect for cuts and. bruises: Re- move any stones or debris from track, or track suspension mechanism, Inspect tracks for proper tension; there should be ¥%-inch sag midway between top roller and idler with 150-pound load. (14) Trem 15, SPRINGS AND SUSPENSION. Look for sagged or broken front springs, shifted leaves, loose or missing rebound clips, and loose U-bolts. Inspect volute and coil springs for breakage: Observe: cap screws:and nuts on bogie, idler, drive sprocket, drive sprocket hubs, track support rollers, and bogie wheels, for tightness. 46™ 9-710 18-19 INSPECTION AND PREVENTIVE MAINTENANCE SERVICES (15) Irem 16, STEERING LinKaGE. Examine steering gear case, steering arm, drag link, tie rod, and Pitman arm, for secure mouriting ‘and good condition. Test adjustment by back-and-forth movement of steering wheel. (16) Irem 17, Fenpers, BUMPERS, oR ROLLER. Examine fenders, bumper, or roller, for secure mounting and serviceable condition. See that roller springs are in good condition, that front roller turns and is properly lubricated. (17). Ire. 18, ‘Towinc Cowngctions, Examine pintle and tow hooks for secure mounting and good condition. - (18) ITEM 19, Bopy anp Loap. Observe load for proper stowage; tarpaulins and curtains for adequate fastening and good condition. Check armament and ammunition for presence. (19) Irem 20, DeconTAMINaToR. Examine decontaminator for full charge and secure mounting. (20) Trem 21, Toots aNp Equipment. Inspect tools and equip- ment for presence, serviceability, and proper stowage. (21) Tre 23, Driver's PeRMrT aND ForM No. 26. Accident report form No. 26, vehicle manual, Lubrication Guide, and W.D. AGO form No. 478 must be present, legible, and safely stowed. Driver must have Driver's Permit on his person. (22) Ive 22, ENGINE OPERATION. Accelerate engine and observe for unusual noises, indicatifig compression or exhaust leaks, worn, damaged, loose, inadequately lubricated parts, or misfiring. (23) Ire 25, DURING-OPERATION SERVICE, Begin the “During- operation Service” immediately after. the vehicle is in motion. 19. DURING-OPERATION SERVICE. , a. While vehicle is in motion, listen for any sounds such as rattles, knocks; squeals, or hums that may indicate trouble. Look for indica- tions-of trouble in cooling system and smoke from,any part of the vehicle, Be on the alert to detect any odor of overheated components or units such as generator, brakes, or clutch, or fuel vapor from a leak jn fuel system, exhaust gas, or other signs of trouble. Any time the brakes are used, gears shifted, or vehicle turned, consider this a test, and notice any unsatisfactory or unusual performance. Watch the instruments carefully. Notice promptly unusual instrument indication that may signify possible trouble in system to which the instrument pertains. "y _ b. Procedures. During-operation Service consists of observing items listed below according to the procedures following each item, and investigating any indications of serious trouble. Notice minor deficien- cies to be corrected or reported ‘at earliest opportunity, usually next scheduled halt. (1) Trem 27, Foot anp HAND Brakes. Foot brakes. must stop vehicle smoothly, without side pull, within reasonable distance, with at least orie-third reserve pedal travel. Brake pedal should have ¥2-inch free travel. Hand brake must hold vehicle securely ‘on reasonable in- cline with 1/4-reserve ratchet travel a7‘TM 9-710 19-20 BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) (2) Item 28, CéurcH. ‘Clutch must operate smoothly without chattering, grabbing, or slipping. Inspect for free pedal travel of 1 to 1% inch. ed (3) rem 29, TRANSMISSION. AND POWER TAKE-OFF. Gearshift ‘mechanism must operate smoothly, and gears must stay in mesh. - (4) Irem 30, TRANSFER. Gearshift mechanism must operate smoothly. Gears must stay in mesh. ’ (5) Trem 31, ENGINE anp ContRots. Observe whether or not engine responds readily to controls and has adequate pulling power without unusual ‘noises, stalling, misfiring, overheating, or excessive exhaust smoke. (6) ITEM 32, INSTRUMENTS. Observe readings of instruments frequently during operation, to see whether or not they are-indicating properly and whether or not the systems to which they pertain are functioning properly. (a) Fuel Gage. Fuel gage must show approximate amount of fuel in tank according to position of toggle switch. (b) Oil Pressure Gage. At normal vehicle operating speeds, pres- sure should be about 20 to 35 pounds. Pressure should not fall below four pounds at idle., : (c) . Temperature Indicator: Indicator hand should rise slowly dur- ing warm-up. Normal operating temperature is 155°F to 185°F. CAU- TION: Do not operate engine over 2,000 revolutions per minute until cooling system temperature has reached 160°F. (d) Ammeter. The ammeter should show a high charge for short period after starting and a zero or positive (+) reading above 12 to 15.miles per hour with lights and accessories off. A zero reading with lights and accessories on is normal. (e) Tachometer. Tachometer must indicate engine speed without excessive fluctuation or unusual noise. 5 (f) Speedometer. Speedometer must show vehicle speed, accumu- lating trip mileage, and: total-mileage. Indicator hand should move steadily without unusual fluctuation. (7) Trem 33, STEERING GEAR. Observe steering mechanism for excessive pulling to either side, wandering, or shimmy. (8) Irem 34, Runnine Gear. Listen for unusual noises from wheels, axles, bogie, or'track suspension mechanism. (9) Ire 35, Bony, Be alert for noise that could indicate shifting load, loose tarpaulin or curtains, loose or damaged panels, hardware, body attachments, or gun mounts. Observe towed vehicle for weaving, shifting of load, or loose tarpaulin. 20. AT-HALT SERVICE. a. At-halt Service may ‘be regarded as minimum maintenance procedures-and should be performed under all tactical conditions even though more extensive maintenance services must be slighted or omit- ‘ted altogether. . b. Procedures. At-halt Service consists of investigating any de- ficiencies noted during operation, inspecting items listed below accord- 48T 9-710 20 INSPECTION AND PREVENTIVE: MAINTENANCE SERVICES ing to the procedures following the items, and correcting any deficien- cies found, Deficiencies not corrected should be reported promptly to the designated individual in authority. (1). IveM 38, Furt, Or, anp WaTER, Examine fuel, oil, artd water. levels, and replenish ‘as required. If during period when antifreeze is used, an abnormal amount of water is required to fill radiator, have coolant tested with a hydrometer and add antifreeze as necessary. “(2) Trem 39, Temperatures, (Huns, BRAKE DRUMS, TRANSFER, ‘TRANSMISSION, JACKSHAFT, AND FRonT AXLE). Feel brake “drums, wheel hubs, transmission, transfer, front axle, and jackshaft, to see if they are abnormally hot, Examine all units for excessive oil leaks. (3): Ivem 40, AXLE “AND TRANSFER VENTS, Examine axle and transfer vents for presence, Must not be damaged or clogged. (4) vem 41, PROPELLER SHaFT. Inspect propeller shaft and joints for looseness, damage, or oil leaks. (5) Trem 42, Sprincs, Look for broken front spring leaves, loose clips, loose shackles, or loose U-bolts. Examine volute and coil springs for breakage. (6) 17843, STEERING LINKAGE. Examine steering control mecha- nism for damage or looseness. Investigate any irregularities noted during operation. (7) Trem 44, WHEEL AND FLANGE Nurs, Obseive whether or not wheel, axle, and jackshaft flange nuts are present and tight. See that track suspension mechanism nuts are. present and tight. . (8) Ivem 45, Tires anp Tracks, Inspect for Hat tires, damage, “cuts, or foreign matter embedded in treads. Remove stones or debris from track and track suspension, Inspect for %4-inch sag, measured midway between top roller and idler, vehicle loaded normally, and with all slack in top of track. Track should be loaded with 150 pounds at point of measurement of sag. (9) Trem 46, Laks, GENERAL, Look around engine, and on ground beneath vehicle for excessive leaks, Trace the source; correct, or report the trouble. (10). IveM 47, ACCESSORIES AND BELTS. See that fan, watér pump, and generator are secure, that fan belts are adjusted to deflection of 34-inch and are not badly frayed... (11) Ivem 48, Arr CLEANERs. If dusty or Sandy conditions’ have been encountered, drop oil reservoir and examine for ‘excessive dirt. Service, if required. Clean and reoil the oil filler breather each time air cleaner'is serviced. (12) [rem 49, FENDERS, BUMPER, oR ROLLER, Inspect fenders, bumper, or roller for looseness or damage. (13) Item 50, Towne Connections. Inspect pintle hook, fesiler brake, and light socket attachment for serviceability. (14) Irem 51, Bopy, Loap, AnD TaRPautins. Inspect body for damage; vehicle and trailed vehicle loads for shifting, See that tarpau- lins are properly secured and not damaged. (15) Item 52, APPEARANCE AND GLAss. Clean glass and: light lenses, and inspect vehicle for damage to body finish or markings. ao™ a710: Basic HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) 21. AFTER-OPERATION. AND WEEKLY SERVICE, a. ~ After-operation, Service is particularly important because at this time. the driver inspects his vehicle to detect any deficiericies that thay have developed, and corrects those he 'is permitted to handle. He shduld report promptly, to the designated individual in authority, the resultsof his inspection, If this schedule is.performed thoroughly, the vehicle should be,ready to roll again on‘a moment's noticé. The Before-operation Service with a few exceptions, is then necessary only to ascertain whether ‘or not the vehicie is in the same condition’ in which it was left upon completion ofthe Aftef-operation Service. The. After-operation Service ‘should never -be antirely omitted even in extrenie tactical situations, but may be reduced to the bare fundamental services outlined for the At-halt Service if nécessary. b.’- Procedures.’ When performing the After-operation Service, the driver mtist remember and consider any irregularities noticed dur- ing the day in the Before-operation,-During-operation, and At-halt Services: The After-operation Service consists of inspécting and servic- ing the following items. Those items of the After-operation Service that are marked by an asterisk (*) require additional weekly services, the procedures for which are indicated in subparagraph (6) of each ap plicable item. a (1) “Trem 55, Enoine Operation. Listen for missing, backfiring, noises, or vibration, that might indicate worn arts, loose mountings, faulty fuel mixture, or faulty ignition. (2) Irem 56, IystruMenrs. Inspect all ‘instruments to see’ that -they-are seturely connected and not damaged. Inspect compass for indication of true magnetic north; check with known direction or with ‘compass of known accuracy in another vehicle. (3) Ivem 57, Hon anb WinpsHietp WirErs. Inspect horn for . good condition and secure mounting: Operate both windshield wipers, and‘sée that blades contact glass.effectively throughout full stroke. > . (4)... [vem 54, Fugv, Om, anp WaTER. Check coolant and oil levels; -add as needed. Fill fuel tank, Refill spare cans, During period when antifrééze is used, have hydrometer test made of coolant. If loss-of coolant from boiling or other catise has been considerable, add anti- ‘freeze, with water, if required, - : (5) Ive 58; Guass. Clean glass and examine for breakage. (6). Irem 59, Licsrs, Observe whether or not lights “light” with -switeh at “ON” position, and go out when, switch is “OFF.” Observe Stop light Operation. “Clean. lenses... (7). IreM 60, Fire EXTINGUISHER. Be‘sure fire extinguisher is full, securely mounted, and that the nozzle ‘is clean... . (8) Irene 61, DecowraminaToR, Examine decontaminator for good condition and secure-mounting. , (9), Trem 62, *Barrery. 2 (a) See’ that battery is clean,-securely niounted,.and not leaking. See- that electrolyte level reaches bottom of ‘filler well when cap. is removed from yent, (Electrolyte should:stand ¥% inch above plates). See that filler. caps’ are in place’with vents open. Clean terminals if dirty. 50°T™ 9-710 21 INSPECTION AND PREVENTIVE MAINTENANCE SERVICES (b) \ Weekly, Clean top of battery, remove filler caps, and place cap on vents. Add clean water to top of filler well, Remove battery caps from vents (electrolyte level should fall to bottom of well). Replace battery ‘caps on filler well. Clean. corrosion from posts and terminals and apply light coating of grease. Tighten terminals as needed; tighten carrier clamp and hold-down bolts carefully to avoid damaging battery, Clean battery carrier, if corroded: (10) Irem 63, *AccEssoRrEs AND BELTS. (a) Test fan belts, Should have %-inch deflection, Examine belt for good condition. - (b) Weekly. Tighten all accessories such as carburetor, generator, regulator, cranking motor, fan, surge tank, water pump, and oil cooler. (11) Ivem 64, *ELecrriGa WIRING. (a) See that ignition wiring and shielding is securely connected, clean, and undamaged. (b) Weekly. Inspect ignition wiring and shielding for secure at-- tachment and tight connections. Inspect exposed low tension wiring for secure attachment and tight connections. Insulators and conduits must not be cracked or chafed. Observe radio bonding and condensers for clean connections and secure attachment, (12) Ire 65, *AtR CLEANER AND BREATHER CaP. (a) Examine oil in air cleaner to see that it isat proper level and not excessively dirty. Accumulation of dirt in cleaner cup must not exceed ¥ inch, Clean and refill reservoir as required. Clean and reoil. oil filler breather cap when,so equipped. (b) Weekly. Clean and service air cleaner and oil filler breather. (13) Trem 66, *FuEL FILTERS, (a) Examine fuel filters for leaks. (b) Weekly. Remove bowl from fuel pump fuel filter and clean out sediment and water. Be ‘sure bowl is replaced tightly, without leaks. Cleari bow! fromi fuel filter at carburetor and tighten carefully to avoid leaks. Replace’ gaskets if necessary. ‘ Q4) ITEM 67, ENGINE ConTROLs. Examine engine controls for - excessive wear or disconriected linkage. (1S) Trem .68, *Trres AND TRACKS. (a). Inspect tires and tracks for cuts or abnormal tread. wear. .Re- move foreign bodies from treads. Test tires for 55° pounds pressure (combat tires) when tires are cold. Inspect bogie wheel tires for cuts or separation from wheels. Remove oil or grease from tires or tracks, Remove sticks, stones, or other foreign material that may be lodged in track or suspension mechanism. Inspect for bent, loose, or broken track guides, Inspect track tension for 44-inch sag between top roller and rear idler with load weighing about 150 pounds on track, near point of measurement. NOTE: There should be %4-inch sag with ve- hicle under normal load and on hard level surface, and load placed in such a manner that it does not twist the track. CAUTION: Do not park-in mud or water during freezing weather, because of difficulty of loosening tracks. 51TM 9-710 21 BASIC -HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND 'T) (b).. Weekly. Replace badly worn or otherwise unserviceable tires. Inspect tracks for excessive wear, Track should be removed when rub- ber on ground side has worn to extent that wear on steel cross plates and exposure of cabiés is imminent. Inspect for bent; loose, or broken track guides, . (16) ITEM 69, *SPRINGS. (a) Examine front springs for sag, broken, or shifted: leaves, loose ‘of missing rebound clips, bolts, or shackles, Inspect volute and: coil springs, for sag or breakage. Vohite springs should be replaced if two. or more coils are resting on seat. (b) Weekly. Tighten spring bolts, nuts, shackles, and U-bolts as required. . . (17) Irem 70, STEERING LinkaGs. Inspect steering linkage for bent, loose, or inadequately lubricated parts. (18) Irem 71, PROPELLER SHaFT. Inspect propeller shaft and U-joints for loose connections, lubrication leaks, or damage. (19) Trem 72, *AXLE, TRANSFER, AND JACKSHAFT VENTS. (a) Inspect axle, transfer and jackshaft vents for good condition, cleanliness, and secure,attachment. (b) Weekly. Remove, clean, and install vents. Make sure differ- ential carrier mounting cap screws are tight. . (20)-Irem 73, Leaks, GENERAL. Look under hood and beneath vehicle for indications of fuel, oil, water, or brake fluid leaks. (21) Irem 74, Gear Om LeveLs. After units have cooled, inspect differentials, transmission, and transfer lubricant levels. Look for leaks. Lubricant ‘should be ¥ inch below bottom of the filler hole (unit cool). (22) Irem 76, FENDERS, BUMPER, AND RotLer. Inspect fenders, bumper, and roller for good condition and secure mounting. (23) Irem 77, Towine Connections. Inspect pintle and tow hooks and towed load connections for good condition and secure attachment. (24) Trem 78, Bopy; Loap, AND TARPAULINS.’ Inspect body, top, cab, and windshield for good condition; armament, ammunition, and load for, proper mounting or stowage; tarpaulins for good condition and secure attachment. Inspect towed vehicle for proper stowage of load and good condition and fastening of tarpaulins. . (25) Irem 79, ARMOR, FRONT ROLLER og WINCH (ON VEHICLES So Equrprep). Inspect body armor, cab, doors, hood, windshield covers and port hole covers for damage, broken welds, loose mounting bolts, \screws, or rivets. Examine radiator. shutters for good condition. ‘Test operation of controls. Inspect front roller and front roller springs for good condition and secure mounting, Inspect winch for good condition and secure mounting. See that cable is properly wound and in good condition ,(not frayed)..and ‘that cable chain and hook are in, good condition and securely attached. See that clutch ‘moves freely and: latches securely. Inspect winch propeller shaft for good condition. (26) Irem 81, GUN Mounts. Examine mounts of guns to’see that they are secure and in good condition for immediate use. Test elevat- 52™M 9-710 2 INSPECTION AND PREVENTIVE MAINTENANCE SERVICES ing and traversing mechanism and firing controls for proper operation (on vehicles so equipped). (27) Trem 82, “TIGHTEN. (a) Tighten any loose wheel drive flange, sprocket, idler, and sup- port roller nuts. Tighten spring U-bolts, if loose. (b) Weekly. Tighten all vehicle assembly or mounting bolts, nuts, or screws, that inspection indicates require tightening. Inspect for présence of cotter keys and locking wires. . (28) Trem 83, “Lupricate as NzEDED. (a) Lubricate spring shackles and steering linkage, if lubrication is needed. (b) Weekly. Lubricate points indicated on vehicle Lubrication Guide on a weekly or mileage basis. CAUTION: Remove excess grease, which has been torced out of bogie wheel and top roller bearings, to avoid its contact with rubber tires ard rubber: tracks. (29) Trem 84, *CLEAN ENGINE AND VEHICLE. (a) Clean dirt and trash from inside of body. Remove excess dirt from exterior of engine. (b) Weekly. Wash vehicle when possible; if not possible, wipe off thoroughly. Clean engine. (30) Ive 85, “Toots anp EquipMENT. (a) See that all tools apd ea equipment assigned to vehicle are present, serviceable, and securely (b) Weekly. Check toois and equipment with vehicle stowage list: 53™ 9-710 . 22 BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) Section VII -LUBRICATION Paragraph Lubrication Guide: 22 Detailed lubrication instructions. 23 22: LUBRICATION.GUIDE. . a. ‘War Department Lubrication Guide No, 21-(figs. 32 and 99 prescribes lubrication maintenance for Half-track Car M2A1.. This guide is representative of the vehicles covered. in this manual. For detailed lubrication instructions covering each vehicle, refer to War Départment Lubrication Guides as listed below: Car, Kalf- ‘track, M2 and M2A1.. Carrier, personnel, M3 and M3A1. Carrier; mortar, 81-mm, half-track, M4 and M4A1 Carriage, motor, guri, 75-mm, M3 and M3A1 Carriage, motor, 75-rim, howitzer, T30..... Carriage, motor, howitzer, 105-mm, T19.. Carriage, motor, multiple gun, M13 Cattiage, motor, multiple gun, M15 and M1SA1 Carriage, motor, multiple gun, M16... Carrier, mortar, 81-mm, M21. b. A Lubrication Guide is placed on, or is issued with, each item ‘of materiel; and must be carried with it at all times. In the event the -materiel is Teceived without a Guide, the using arms must immediately requisition a replacement from the Commariding Officer, Fort Wayne Ordnance Depot, Detroit 32, Michigan. ¢. Lubrication instructions on the Guide are binding on all echelons of mainténance and there must be no deviations, except as indicated in subparagraph d below. d. Service intervals specified on the Guide are for normal operat- ing conditions, Reduce these intervals under extreme conditions such as excessively high or, low temperatures, prolonged periods of high ‘speed’ operation, ‘continued operation in sand or dust, immersion in water, Gr exposure to moisture, any one of which may quickly destroy the protective qualities of the lubricant, e. _ Lubricants are prescribed in the “Key” in accordance with three temperature ranges: above + 32°F, +-32°F to 0°F, and below 0°F. Determine the time to change grades of lubricants by ‘maintaining a close check on operation of the. vehicle during the approach to change- over periods. Be particularly, observant when starting the engine. Sluggish starting ‘is an indication of lubricants thickening and the signal to change to. grades prescribed for the next lower temperature range. Ordinarily it will be necessary to change grades of lubricants only when air temperatures are consistently in the next higher or lower range, unless: malfunctioning occurs sooner.due to lubricants being too thin di too heavy. 54TM 9-710 22-23 LUBRICATION f. Loealized Views. Refer: to series of illustrations (figs. 34 through 38) for localized views of various lubrication points. Caption undér each view briefly describes the type of fitting, method of lubri- cation, and special information regarding the lubrication of that specific item.” The illustrations or captions do not specify lubricant (except by symbols) or intervals at which points must be lubricated. Reference must be made to Lubrication Guides (figs. 32 and 33) for those items. Information on those items'which require special lubrication operations will be found in respective sections of the manual: 23, DETAILED LUBRICATION INSTRUCTIONS. a. Lubrication Equipment. (1) -Each piece of materiel is supplied with lubrication equipment adequate to maintain the materiel. This equipment must be'cleaned both before and after use. (2) Lubrication guns must be operated carefully and in such man- ner as to insure a proper distribution of the lubricant. -b. Points of Application. (1) Lubrication fittings, ‘grease cups, oilers, and oil holes are readily identifiable’ on the materiel by a red circle. Such lubricators and the surrounding surface must be wiped. clean before. lubricant is applied. (2) Where relief valves are provided; ‘apply new lubricant ustil the old lubricant is forced from the vent. Exceptions are specified ir in notes on the Lubrication Guide. ¢. Cleaning, SOLVENT, dry-cleaning, or OIL, fuel, Diesel must be used to clean or wash’all parts; Use of gasoline for this purpose is prohibited. After washing, parts must be thoroughly dried before applying Jubricant.. . d. Lubrication’ Notes on Individual Units and Parts. The fol-. _lowing instructions supplement those notes on the Lubrication Guides (figs. 32 and 33) which pertain to lubrication and service of individual units and parts of the vehicle.” z (1) Arr-CLEANERS. (a) Oil Bath Type. Daily, check level and refill engine air cleanef oil reservoir to bead level with used crankcase oil or OIL; engine, SAE 30-above +32°F, and SAE 10 from +32°F to 0°F. Below 0°F, re- move oil and operate dry, Every 1,000 miles, daily under extreme dust conditions, remove air cleaner and wash all parts. (b)” Element Type: Every 1,000 miles, remove, wash curled hair in brake vacuum or hydrovac cylinder air cleaners“and reoil with used crankcase oil or OIL, engine, SAE 30 above +32°F or SAE 10 from +32°F to 0°F. From 0°F to ~40°F, use FLUID, shock-absorber, light. Below -40°F, wash and replace dry. (2) Bocts Waeets. CAUTION: Some modifications are, sealed and have no relief valve, nor will lubricant come out: bearing wher: full. To prevent breaking seals, use low préssure gun and never force lubricant into these units. 55TM 9-710 23 BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) gegore ad va is pus sens oe By Buoy wen HOU, Ors 9909 AN 2e6y PHS Fue amd RL 9D A paisa wovinavans 304 = sear aera [toes a sump SOM aah Ge uno “ss ed 2 std 56™ 9-710 23 LUBRICATION aseeoee ad we Pree £e8u'd ety a eety'a se8u'a s00u 9 oe Pye et By 'a eeu 'e sivataunt ping uopsyiqat—ze o1nBiy wmomopemonemensecsnectts] ON i siH9 08 sere sate tes en SINVOIMErTT Ww Suyusy 20 2 do umial ty eee 37TM 9-710 23- BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) 289088 aa Vi ze 80H ee Bu oath 29 PUR om — PORE iupici woary Tine: \ 9 Gm wopends sag PEPE, peers s0 ne. ; pan uv aris aT “nie : & 58TM: 9-710 23 LUBRICATION PING vOHOzaqnT—gE asnByy -arcoots aa va ervemmarmerie! VOM sunny ye edad a 35 yL—aAN “aed ms sevsvo—09 SINvOREM » [Sete Senet 39™ 9-710 23 BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T} * (3) Brake Vacuum CyLINDER AND Hyprovac CYLINDER. (a) Brake Vacuum Cytinder; Early Models, Every 6,000 miles, re- ‘move plug in front of cylinder and lubricate with one-half ounce of FLUID, shock-absorber, light. Disconnect piston and rotate to dis tribute oil on leather. Replace plugs. (b) Hydrovac Cylinder, Late Models. Every 6,000 miles, lubricate through plug holes in top and rear of. cylinder with one-half ounce of FLUID, shock-absorber, light. (4) BREATHER AND VENTS. (a) Breather, Every 1,000 miles, remove crankcase breather, wash curled hair and reoil with used crankcase oil or OIL, engine, SAE 30 above: -+-32°F or SAE 10 from +-32°F to 0°F. From 0°F to -40°F, use FLUID, shock-absorber, light. Below -40°F, wash and replace dry. (b) Vents, Flywheel housing, transmission, transier case, differ- entials, arid steering gear vents must be cleaned and kept open. Inspect each time lubricant level is checked, and each time vehicle is operated under extremely dirty. or muddy conditions, (5) CLurca Prot. BEARING, When clutch is disassembled for any other purpose, remove, clean and repack with GREASE, ball and roller bearing. (6) Crankcase. Daily, check level and “refill to “FULL” mark with OIL, engine, SAE 30 above +32°F or SAE 10 from +32°F to O°F. Below 0°F refer to OFSB 6-11, Every 1,000 miles, remove drain plug from Bottom of crankcase and completely drain case. Drain only when engine is hot. After thoroughly draining, ‘replace drain plug and Fefill crankcase to “FULL” mark on gage with correct lubricant to meet ‘temperature requirements, Run engine a few minutes and recheck oil level. CAUTION: Be sure pressure gage indicates oil is circulating. (7) Distrieuror. Every 1,000 miles, lubricate distributor shaft with GREASE, general purpose, No. 2, by turning grease cup down one full turn. Every 6,000 miles, wipe the distributor breaker cam lightly with GREASE, general purpose, No. 1 above +32°F and No. 0 below -+32°F. Also lubricate the breaker arm pivot and wick under rotor with one to two drops of OIL, engine, SAE 30 atiove +-32°F, SAE 10 from ++32°F to 0°F or OIL, lubricating, preservative, special, below 0°F. (8) Gear Cases, Differentials, transmission and transfer case, and winch worm housing only. Weekly, check level with truck on level ground and, if necessary, add lubricant to one-half inch below plug level when ¢old, or to plug level when hot; except winch worm housing which must be filled to plug level at ail times. Every 6,000 miles, drain and refill. Drain only after operation when gear lubricant is warm Refill with LUBRICANT, gear, universal, SAE 90 above +32°F, SAE 80 from +32°F to 0°F or grade 75 below 0°F, (9) JacksHart Drive Sprocket BEARINGS, Every 6,000 miles, remove tracks, drive sprocket. fanges, bearing hubs, and bedrings. Clean and repack bearings with GREASE, general purpose, No. 2. (10) Om Firters. Every 1,000 miles, remove drain plug from oil filter to drain sediment. Every 6,000 miles, or more often if filter be- 60TM 9-710 23 LUBRICATION comes clogged, remove filter element, clean inside of case, and install new element. After renewing element, run engine a few minutes, re- check crankcase oil level and fill to “FULL” mark with the correct grade of OIL, engine. . (11) ‘Unrversai. Jomts AND SurP JoInTs, Use GREASE, general purpose, No. 1 for temperatures above +32°F or GREASE, general purpose, No. 0. below +32°F. Apply grease to universal joint until it overflows at the relief valve, and to the slip joint until lubricant is forced from the’ vent at the universal joint end of the spline. (12) Unrversat Jowts (Front WHEELS). To fill, place vehicle on level ground. Remove the inspection plugs. Fill through rear plug hole until the lubricant is level with opposite hole.- Replace the plugs. CAUTION: Every 6,000 miles, remove, clean, inspect, and reassem- ble universal joints. Remove plug in spindle, insert fitting and inject one pound GREASE, general purpose, No. 1 above +-32°F or No. 0 below +32°F. Replace plugs. Refill universal joint housings. (13) WHEEL Bearincs. Remove bearing cone assemblies from hub. Wash bearings, cones, spindle, and inside of hub and dry thoroughly. Do not use compressed air, Inspect bearing races and replace if dam- aged. Wet the spindle, inside of hub, and hub cap with GREASE, gen- eral purpose, No. 2 to a maximum thickness of Ms inch only to retard rust. Lubricate bearings with GREASE, general purpose, No. 2 with a packer, or by-hand, kneading lubricant into all spaces in the bearing. Use extreme care to protect the bearings from dirt, and immediately reassemble and replace wheel. Do not fill hub or hub cap. The lubri- cant in the bearing is’ sufficient to provide lubrication until the next service period. Any excess might result in leakage into the drum. Ad- just bearings (par. 137). (14) Wincn Casve. After each use, clean and oil with used crankcase oil or OIL, engine, SAE 30 above +32°F, SAE 10 from -++32°F to 0°F, or OIL, lubricating, preservative, special, below 0°F. If cable'has not been used, coat outer coils weekly. Unwind entire cable, clean and oil monthly. (15) Omcan Pornts, Every 1,000 niles, lubricate throttle rod ends, clevises, hinges, latches, vacuum cylinder valve and power lever linkage, disk brake control linkage (when equipped with bumper rollers, bump- er roller slides and bushings) with OIL, engine, SAE 30 above +32°F, SAE 10 from +32°F to 0°F, OIL, lubricating, preservative, special, below 0°F. (16) Do Nor Lusricare. Springs, shock absorber links, water pump, fan; bogie wheel suspension linkage and, slides, bumper roller bearings (when so equipped). e. Points to be’ Lubricated hy .Ordnance Personnel Only. | (1), CRANKING Moror REDUCTION GEAR CASE ‘AND BENDIX Drive. Every 6,000 miles, remove and clean Bendix drive. Lubricate drive shaft outer bearing through oiler with OIL, engine, SAE 30 above +32°F, SAE 10 from +-32°F to 0°F or OIL, lubricating, preservative, special, below 0°F. Every 6,000 miles, remove plug in top of reduction gear housing and refill with GREASE, general purpose, No, ‘1 above “+32°F or No. 0 below +|-32°F.: Yearly, disassemble, clean gears, 61TM F-710 23 BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) ‘ . (OL FILLER SPOUT AND BREATHER CAP on FureR “ake , UNIVERSAL JOINTS (FRONT WHEELS) STEERING KNUCKLE BEARINGS RA PD 314008 Figure 34—Localized Views 62TM 7-7 I 23 LUBRICATION GENERATOR GREASE CUPS RANKING MOTOR OILERS. REAR AXLE PROPELLER SHAFT AND SLIP JOINT imines FRONT AXLE PROPELLER SHAFT SPLINE FITTING FRONT AXLE UNIVERSAL JOINT FITTING RA PD 314009 Figure 35—Localized Views 63Se ee BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) 4 ‘CLUTCH PILOT BEARING FITTING. ‘CLUTCH RELEASE SHAFT RA PD 314010 Figure 36—Localized Views 64™ 9-710 23 LUBRICATION WINCH ORUM BEARING AND SHAFT FITTING WINCH DRUM BEARING AND SHAFT FITTINGS WORM HOUSING FILLER PLUG r BOGIE WHEELS IDLER ADJUSTING SCREWS IDLER SPROCKET FITTING RA PD 314011 Figure 37—Localized Views 6523 BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) assemble, and refill housing with GREASE, general purpose, No. 1 above +32°F or No. 0 below +32°F. f. Reports and Records. (1) Reports. Report unsatisfactory performance of materiel to the Ordnance Officer responsible for maintenance. (2) Recorps, A record of lubrication may be maintained in the Duty Roster (W. D., A.G.O, Form No. 6). TRANSMISSION AND TRANSFER CASE PLUGS FRONT AXLE DIFFERENTIAL PLUGS REAR AXLE DIFFERENTIAL PLUGS RA PD 314012 Figure 38—Localized ViewsT 9-710 24-26 TOOLS AND EQUIPMENT STOWAGE ON THE VEHICLE Paragraph Representative stowage lists. . .. 24 ‘Use of stowage lists. . 25 Armament and ammunition, ‘MBA. 26 Armament and ammunition, M16. . 27 Gun tools and equipment, M3A1": 28 Gun tools and equipment, M16. 29 Vehicle accessories, M3A1*. 30 Vehicle accessories, M16. 31 Vehicle tools and spare parts, M3AL*: : vee 32, Vehicle tools and spare parts, M16..............-.. wl. 33 4.’ REPRESENTATIVE STOWAGE LISTS, a. This section of this manual combines two representative stowage lists, which apply to Personnel Carrier M3A1 and Multiple Gun Motor Carriage M16, These stowage lists do not include personal equipment which has no stowage on the vehicle, but is worn on the person, such as helmets, goggles, etc. These lists do not apply in full to all half-track vehicles covered by this manual, but merely are representative. 25. USE OF STOWAGE LISTS. -a, Representative stowage lists given in this section of this manual are for information only. CAUTION: These stowage lists are not in- tended as authority or basis for requisitioning. 26: ARMAMENT AND AMMUNITION, M3A1 a, Armament. Number tem Carried Whore Carried Gun, machine, cal. .30 model M1919A4 (flexible) 1 Oncarriage from mount M35 Gun, machine, cal. 50 M2 HB. (flexible) z On ring mount M49 Gun, Thompson, submachine, . cal. .45 M1928A1 or M1 1 Above left gasoline tank, in brackets provided. Rifle, M1 12 In brackets provided behind left and right rear seats. b. Ammunition. Cal. .30 rounds (in ammuni- 7,750 One 250 round box in front tion boxes D44070 and floor well. Remainder of belts C3951) boxes and belts located where convenient. Personnel Carrier M3A1. 67™ 9-710 BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) "26-27 . Number them Carried Cal. .45 rounds 540 700 Cal. .50 rounds: (in boxes 173913) . e. Hand Grenades. Chemical A.T. (AW mixture) “2 M1 ‘ Fragmentation, MK IT a Offensive, MK UI (w/fuse, 10 detonation hand grenades, M6) Smoke M8 2 Thermite, incendiary _ 2 CN-DM irritant M6 4 d. Mines. . . Mines, A:T: w/fuse M1 24 27. a, Armament. Adapter, grénade, cal. 30, 1 M1903 rifle - Carbine, cal. 30 . 3 Gun, machine, cal. 50, M2 4 (without edgewater adapter) T.T. H.B. . Gun, Thompson, submachine, 1 _ eal. .45, M1928A1 or M1 Rifle, cal. .30, M1903 1 b, Ammunition. 420 Cal. .45 rounds 7 *Cal, .50 rounds, packed as 5,000 follows: x 200 round chests 10 200 round belts 15 e. Hand Grenades. ° Fragmentation, MK II 12, 74,600 when radio set SCR 528 is used, Where Carried Under right rear seats. One 100 round box on gun. Remainder of boxes lo- cated where ‘convenient. In; box between front seats. In box between front seats. In box between front seats. In box between front seats. In box between front seats. In box between front seats. Outside in rack left and right sides. ARMAMENT AND AMMUNITION, M16. In grenade chest. 2 in right side fighting com- partment; 1 ‘in ‘driver's compartment. Gun mount, M45. Left side fighting compart- ment. 7 . Driver’s compartment. Left side fighting compart: ment. . . In fighting compartment. In box left side fighting’com- partment. #Biight 200-round chests when radio set SCR 528 is uséd. 638T™ 9-710 27-28 TOOLS AND EQUIPMENT STOWAGE ON THE VEHICLE Number tem Carried Where Carried Smoke, M8 12 In box sight side fighting compartment. Thermite, incendiary 2. In floor well. Grenades, rifle, M9A1 10 Under radio shelf. 28. GUN TOOLS AND EQUIPMENT, M3AI* a. Gun Accessories. (1) Accessorigs FoR CAL. .45 SUBMACHINE GUN. Brush, chamber cleaning, M6 1-—“ Under left rear seats Brush, cleaning, cal...45,M5 1 — Under left rear seats. Case, accessories and spare 1 Under left rear seats, parts M1918 w/o contents Cover, assembly, Thompson 1 On gun, or under left rear submachine gun cal. .45 seats. Envelope, fabric, one button 1 Under left rear seats. 3x 3}4in. Magazine, 30 rounds (clip) 18 Under left rear seats. Oiler, Thompson submachine 1 Under left rear seats. gun Under left rear seats. On gun. Rod,-cleaning Sling, gun M1923 (webbing) 1 1 1 (2) ACCESSORIES FOR CAL. .30 MACHINE GUN. 1 Thong “Under left rear seats. Bag, empty, cartridge, cal. On gun or under right rear -30 or cal. .50 seats. Belt, ammunition, 250 rounds = 31. In ammunition boxes pro- . vided. Box, ammunition cal..30,M1 31 Located where convenient. Brush, chamber cleaning, M6 1 Under right rear seats. Brush, cleaning cal. 30, M2 3 Under right rear seats. Can, tubular (w/o contents) 1 Under right rear seats.» Case, cleaning rod, M1 1 Under right rear seats. Case, cover group 1 - Under right rear seats. Case, spare bolt, M2 (w/o 3 Under right rear seats. contents) Chest, steel, MS (w/o con- 1 Under right rear seats. tents) . Cover, cal. .30 machine gun 1 On gun or under right rear ® seats. Cover, spare barrel 1 _-Under right rear seats.. Cover, tripod mount, M2 = On tripod. Cover, tripod mount over-all -1 Outside rear door on brackets. * “Personnel Carrier M3A1. 6o™ 9-710 28 BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) tem Cradle, assembly (less am- munition tray, D36951) Envelope, spare parts, M1 (w/o contents) Extractor, ruptured cartridge, MK IV Mount, tripod, machine gun, cal, 30, M2 Oiler, rectangular 12-0z Reflector, barrel cal. .30 Rod, cleaning jointed'cal. .30, M1 Roll, spare parts, M13 w/o contents) . Roll, tool, M12 (w/o.-con- tents) . (3) Accessories FoR Can. Bag, empty cartridge, cal. .30 or cal. .50 Bag, metallic belt link Box, ammunition cal. .50, M2 Brush, cleaning, cal. .50, M4 Carriage, assembly Case, cleaning rod, M15 Chute, metallic belt link, M1 Cover, cal. 50 A.A. machine gun Cover, spare barrel, M13, 45-in. Cover, tripod mount, M1 Cradle, assembly Envelope, spare parts, M1 (w/o contents) Extractor, ruptured cartridge Mount, tripod, machine gun cal. .50, M3 Slide, belt feed, ass'y, B261110 Spring, belt feed pawl, A9351 Slide, sear Spring, belt feed lever plunger Spring, belt holding pawl Spring, cover extractor Spring, locking barrel 1 1 eee ee 70 Where Carried On fixed pintle. Under right rear. seats. Under right rear seats. On outside of rear door. Under right rear seats Under right rear seats. Under right rear seats. Under right rear seats. Under right rear seats .50 MacuinE Gun, On gun or under right rear ‘eats. Under right rear seats. In right ammunition chest. Under right rear seats. On gun ring. Under right rear seats. Under right rear seats, On gun or under right rear seats. . Under right rear seats. On tripod. On carriage. Under right rear seats. Under right rear seats. On side rear body in brackets provided. Under right rear seats. Under right rear seats. Under right rear seats. Under right rear seats. Under right rear seats.T™ 9-710 28 TOOLS AND EQUIPMENT STOWAGE ON THE VEHICLE tem Spring, sear Stud, bolt b. Gun Spare Paris. Number Corried 1 1 Where Carried Under right rear seats. Under right rear seats. (1) SPARE Parts For CAL. 45 SUBMACHINE GUN. Disconnector, 6D Ejector, 4B (M1928A1 only) Ejector, assembly (M1 only) Extractor, 15A Pin, firing, 14A Rocker, 16D Spring, disconnector, 9A Spring, firing pin, 14C Spring, magazine catch, 9D Spring, recoil, 17C Spring, sear, 9B (2) Spare Parts For CAL. Band, lock, front barrel bear- ing. Band, locke, front barrel bear- ing plug Barret Bolt, group, consisting of: Bolt, assembly, B147299 Extractor, assembly, €121076 Lever, cocking, B131317 Pin, cocking lever, 20867 Pin, firing, assembly, co186 Rod; driving spring, as- sembly, B147222 Sear, C64137 Spring, driving, B212654 Spring, sear assembly, A131265 Cover group, consisting of: 1 Cover assembly, C9801 1 Lever, feed belt, B17503 1 Pawl, feed belt, C8461 i Pin, belt feed pawl as- sembly, B131255 1 Under left rear seats. Under left rear seats. Under left rear seats. Under left rear seats. Under left rear seats. Under left rear seats. Under left rear seats. Under left rear seats. Under left rear seats. Under left rear seats. Under left rear seats. .30 Macuine Gun. 1 1 i 71 Under right rear seats. Under right rear seats. _ Under right rear seats. Under right rear seats. Under right rear seats.TM 9-710 28. BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND 1) Number om Carried 5 Where Carried Pivot; belt feed lever, group assembly, B110529 Slide, feed belt, assembly, B131262 Spring, feed belt’ pawl, B147224 Spting, cover extractor, B17513* . Extension, barrel, group,con- 1 Under right rear seats. sisting of: - Extension, - barrel, as- sembly, C64139 Lock, breech, B147214 Pin, breech lock, as- sembly, B131253 Spring, locking barrel, B147230 - : Frame, lock group, consist- 1 Under right rear seats. ing of: Accelerator, C64142 Frame, ‘lock, assembly, ©9182 Pin, accelerator, assem- bly, B132253 Pin, trigger, A20503 Plunger, barrel, assembly, B131251 Spring, barrel plunger, 135057 ~ Spring, trigger pin, B147231 Trigger, C8476. Lever, cocking Lever, feed belt Pawl, holding belt Pawl, feed belt Pin, accelerator, assembly Pin, belt holding pawl, split Pin, cocking lever Pin, firing, assembly Pin, trigger Plug, front barrel bearing Spring, belt holding pawl Spring, locking barrel Spring, sear, assembly Trigger . Under right rear seats. Under right reat seats. Under right rear seats. Under right rear seats. Under right rear seats. Under right rear seats. Under right rear seats. Under right rear seats. Under right rear seats. Under right rear seats. Under right rear seats. Under right reat seats. Under right rear seats. Under right rear-seats. 72TM 9-710 28-29 TOOLS AND EQUIPMENT STOWAGE ON THE VEHICLE Number Carried Where Carried (3) Spare Parts For Cac. 50 MACHINE GuN. Barrel, assembly Disk, buffer Extension, firing pin assembly Extractor, assembly" Lever, cocking Pin, cotter, belt feed lever pivot stud 3% x 34 in. Pin, cotter, cover pin 4 x Min. Pin, cotter, switch pivot 1% x 34 in, Pin firing Plunger, belt feed lever Rod, driving spring w/spring assembly Slide, belt feed, group consisting of: 1 Arm, belt feed pawl, Bao14 1 Pawl, feed belt, assy, B8961 1 Pin, belt feed pawl, assy, B8962 e. Gun Tools. 1 1 1 1 1 Under right rear seats. Under right rear seats. Under right rear seats. Under right rear seats. ‘Under right rear seats ‘Under right rear seats. Under right rear seats. Under right rear seats. ‘Under right rear seats. Under right rear seats. Under right rear seats. Under right rear seats. (1) Toots For Cat. .30 MACHINE GUN. Oiler, filling, oil buffer. Rod, jointed, cleaning, M7 Screwdriver, common, 3-in. jade Tray, ammunition Wrench, combination, M6 Wrench, socket, front barrel bearing plug 1 1 1 1 1 1 Under right rear seats. Under right rear seats. Under right rear seats. On cradle. ‘Under right rear seats. Under right rear seats. (2) Toots ror Cat. .50 Macnine GuN, Wrench, combination, M2 1 Under right rear seats. 29. GUN TOOLS AND EQUIPMENT, M16. a. Gun Accessories.” (i) Accessories For CAL. .45 SUBMACHINE GuN. Brush, chamber cleaning, M6 Brush, cleaning, cal. .45, MS 1 1 73 Center floor well. Center floor well.TM 9-710 29 BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) Number + Hom. Carried Case, accessories and spare 1 parts, M1918 (w/o con- tents). Cover, assembly, Thompson, 1 submachine gun cal. .45 Envelope, fabric, one button 1 3x3 in. Magazine, 20 rounds (clip) 21 Oiler, Thompson submachine 1 gun Rod, cleaning 1 Sling, gun, M1923 (webbing) 1 Thong . 1 Whore Carriod Center floor well. On gun. Center floor well. Container left side fighting compartment, Center floor well. Center floor well. Center floor well. Center floor well. (2) AccEssorigs For CaL. .50 MacHINE GuN. Brush, cleaning, cal. .50,M4 24 Can, tubular, (w,'o contents) 4 for spare parts Case, cleaning rod, M15 4 *Chest, ammunition, cal..50, 10 M2 Chest, steel, M5 (w/o con- 4 tents) Cover, (mult. cal..50 machine «1 gun mount) Crank, chest, ammunition, 3 M2 b. Gun Spare Parts. 6 in, each M5 chest. lin. each M5 chest. 1 in. each MS chest. In fighting compartment. 2 in driver's compartment under seat; 2 in box in rear of vehicle. On gun mount. Center floor well. (1) Spare Parts For CAL. .45 SUBMACHINE GUN. Catalogue service parts (for 1 vehicle) . Disconnector, 6D Ejector, 4B (M1928A1 only) Ejector, assembly (M1 only) Extractor, 15A : Lamp, inspection 12-16 V. D.C. See Lamp, inspection Link, self-closing (wheel chain 4 repair) Lubrication Guide, War 1 Dept. *Eight when radio set SCR 528 is used. 74 Glove compartment. Center floor well. Center floor well. Center floor well. Center floor well. Glove compartment. Glove compartment. Center floor well. In bracket, right doorTM 9-710 29 TOOLS AND EQUIPMENT STOWAGE ON THE VEHICLE Item Manual, field for cal. .50, M2 HB. ‘Manual, operating Manual, technical for M.G. MC., M16 Manual, technical, mount M.G, mult. cal. 50, M45 Mittens, asbestos, pairs Net, camouflage, 36- x 44-ft Nozzle, flexible, tube Oiler, (trigger type 1-pt) Pack, seat Paulin, 12- x 12-ft, Pin, firing, 144 Pump, assembly; hand, air Rocker, 16D Roll, blanket Snatch block Spring, disconnector, 9A Spring, firing pin, 14€ Spring, magazine catch, 9D Spring, recoil, 17 Spring, sear, 9B Straps, fender, 36- x 114-in. Tape, friction, 34 in. wide, 30-ft. roll Wire, soft iron, 14 gage, 10 ft. long (2) Spare Parts For Cat. Accelerator Arm, belt feed paw! Bar, trigger Barrel, assembly Collar, driving spring rod Disk, buffer Ejector Envelope, spare parts, M1 (w/o contents) Extension, firing pin, assembly Extractor, assembly Gage, head space and timing, cal. M.G. Number Carried i 75 Where Carried Glove compartment. Glove compartment. Glove compartment. Glove compartment. Center floor well. Right front fender. Center floor well. Center floor well. On seat boxes. Left front fender. Center floor well. Center floor well. Center floor well. Box in rear of vehicle. Center floor well. Center floor well. Center fioor well. Center floor well. Center floor well.” Cehter floor well. 2 each front fender, Center floor well. Center floor well. .50 MACHINE Gun. 1 in each MS chest. 1 in each MS chest. 1 in each MS chest. In fighting compartment. 1 in each M5 chest. 2 in each MS chest 1 in each MS chest. 2 in each MS chest. 2 in each M5 chest. 2 in each M5 chest. 1 in each MS chest.TM 9-710 - 29 BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) Nombor hom Carved Where Caried Lever, cocking 4 1 in each MS chest. Lever, feed, belt 4.1 in each MS chest. Lock,'spring, oil buffer body 4 1 in each MS chest. Nut, 3-16NC-2 4 1 in each MS chest. Oiler, rectangular, 12 oz. 4 Lin each MS chest. Pawl, feed, belt, assembly 4.1 in each MS chest. Pawl, holding, belt 4 iri each MS chest. Pin, accelerator, assembly 4 1 in cach MS chest. Pin, belt holding pawl, & 2 in each MS chest. assembly Pin, breech lock, assembly 4 1 in each MS chest. Pin, cocking lever 4 1 in cach M5 chest. tter, split, S., H- x 20 Sin each’ MS chest. Pin, ue Pin, cotter, split, S., ‘- x 20 5 in each M5 chest. l-in. Pin, cotter, split, S., 3@- x 12 3 in each M5 chest. _y-in. Pin, cotter, split, S., \4- x & 2 in each M5 chest. Bin | . Pin, firing 8 2 in each MS chest. Pin, stop, driving spring rod 4 ~—‘1 in each M55 chest. ollar : Pin, trigger bar, assembly 4 1 in each MS chest. Plunger, belt feed lever 8 2 in each M5 chest. Reflector, barrel, cal. .50 4 Lin each M5 chest. Rod, driving spring, w/spring 8 2 in each M5 chest. assembly Rod, jointed, cleaning, M7 4. Lin each MS chest. Roll, spare parts, M14 (w/o 4 -|_‘1 in each M5 chest. contents) Roll, tool, M10 (w/o con- -4 1 in each M5 chest. tents) Screw 4 1 in each MS chest. Screw, cap, hex hd. “4 Fin each MS chest. Screw, filler, oil buffer tube 4 I in each MS chest. Screw, retracting slide brack- 8 2 in each M5 chest. et, front Screw, retracting slide brack- 16 4 in each M5 chest. et, tear $ : Sear 4 1 in each MS chest. Slide, sear 8 2 in each MS chest. Spring, belt feed lever 4 Lin cach M5 chest. plunger 76™ 9-710 29-30 TOOLS AND EQUIPMENT STOWAGE ON THE VEHICLE Number am Carried Where: Carried Spring, belt feed pawl 8 2 in each MS chest. Spring, belt holding pawl 8 — 2'in each MS chest. Spring, cover, extractor 8 2 in'each MS chest. Spring, ejector 4 Lin each MS chest. Spring, locking, barrel 8 2 in each MS chest. Spring, oil buffer 4 1 in each MS chest. Spring, retracting slide lever, , 4 1 in each M5 chest. R. Spring, sear 8 2 in each MS chest. Spring, side plate, trigger 4 1 in each MS chest. : Spring, side plate, trigger 4 1 in each MS chest. slide Stop, sear, assembly 4 1 in each MS chest. Stud, bolt 8 2 in cach MS chest. Washer, lock, toothed, reg, 4 1 in each’ MS chest. Yin, Washer, lock, toothed, reg., 4 “| in each M5 chest. ain. Washer, lock, 34-in. 4 1 in each M5 chest. «. Gun Tools. 2) Toots FoR CAL. .50 MacHINE GUN. Pliers, side-cut., parallel j jaw,’ 4 {in each M5 chest. 6-in. Punch,.drive pin, 1 Punch, drive pin, 1 4 1 in each M5 chest. 4 1 in each M5 chest. Screwdriver, common, .3-in. - 4 ~~ 1 in each M5 chest. blade + Wrench, combination, M2 4 1 in each M5 chest. Wrench, engrs., dble. hd. 4 — 1 in each MS chest. ‘alloy-S., %- x V4in. . Wrench, engrs., dble. hd. 4 — 1 in each MS chest. alloy-S., 34- x 34-in. Wrench, engrs., dble. hd. 4 — 1 in each M5 chest. alloy-S., %4- x 1-in. : 30. VEHICLE ACCESSORIE: a. Sighting Equipment. Binocular, M3, complete 1 © On commander. composed of: 1 Binocular. M3 1 Case, cartying, M17 M3A1.~ Personnel Carrier M3A1.T™ 9-710 30 BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) b. Signaling Equipment. Whore Carried Antenna, complete w/cover 1 Radio set SCR 193, 245,506, 1 _—_‘In brackets provided. 508, or 510 c. Rations. Type “C” two-day ration for 13 men, cans ‘Type “D” one-day ration for . 4 13 men, cans d, Pioneer Tools (fig. 41). 156 Under left rear seat. Under left rear seat. - Ax, chopping, 5-Ib. 1 Outside vehicle in brackets provided. Cover, saw 1 Under right rear seat. Crowbar, pinch point, 60-in. 1 Under left rear seats. Outside vehicle in brackets provided. Under right rear seat. Mattock, pick, with handle 1 Mi Saw, cross-cut (one-man, 434 1 ft long, w/handle) Shovel, short-handled 1 Outside vehicle in brackets provided. ce. Accessories and Miscellancous (fig. 40). Right of right shutter handle, bracket fastened to plate.” Apparatus, decontaminating = 1 1}4-qt., M2 (Spec. 197-54- 113) Appliers, track chain 2 Rear floor well,inbag w/track . chains. 3 Between individual’s feet. 1 Center floor well. 8 Rear floor well. Bag, field, canvas O.D, M1936 Bag, tool Bolt, connector, side chain (track chain repair) Book, 0.0. Form 7255 Bow, top, (1 center, 1 rear) Bucket, canvas, folding 18 at Cable, towing (54-in. x 15-ft) Canteen, M1910, withcupand cover, M1910 Catalogue, service parts (for vehicle) Chain, tire, front wheel (w/bag) (8.25 x 20) Chain, band track narrow Connector, side chain (track chain repair) 1 In glove compartment. 2 Behind left rear seats. 1 Rear floor well. 1 On front bumper. 3 On personnel. 1 In glove compartment. lpr. Rear floor well. lpr. Rear floor well. 8 Rear floor well. 7™ 9-710 30 TOOLS AND EQUIPMENT STOWAGE ON THE VEHICLE tom Container, water, 5-gal. Q.M.C. standard : Curtain, canvas, R.H. w/flap Curtain, canvas, L.H. w/flap Envelope, waterproof Extinguisher, fire (2-1b CO.) and bracket assembly Flashlight (specification 17-197) Gage, tire pressure Gun, lubricating, pressure (hand-operated) Key, map compartment Kit, first aid, 24-unit (Spec. 1553) Kit, tire repair, (hot patch w/elamp) Lamp, inspection 12-16V D.C. Lamp, inspection Link, self-closing (wheel chain repair) Lubrication Guide, War Dept. Manual, field, for A.T. mines Manual, field forcal. .30 M.G. M1919A4 Manual, field for cal. .50 M.G. * M2 Manual, techincal for H.T.C., M3AL Mittens, asbestos Net, camouflage 36- x 44-ft. Nozzle, flexible tube Oiler, (trigger type, 1-pt) Pack, seat Pump, assembly, hand, air Rod, curtain, body Rod, top bow support (front) Rod, top bow support (center) Rod, top bow support (rear) Roll, blanket Snatch block (when winch equipped) Straps, fender, 36- x 1}4-in. Number Carried a 8 rH Eee eee Beweg Bs , Where Carried In brackets on sides of cowl. Behind left rear seats. Behind left rear seats. In driver’s compartment. To right of right front seat. In flashlight clips, Center floor well. Center floor well. In map compartment lock. Under right rear seat. Center floor well. In glove compartment. In glove compartment. Rear floor well. In bracket right door. Under left rear seat. Under left rear seat. Under left rear seat. In glove compartment. ‘Under left rear seats. Under left rear seats. Under left rear seat. Center floor well. In crew compartment. Under left rear seat. Behind left rear seats. Behind left rear seats. Behind left rear seats. Behind left rear seats. Inside canvas seats. Rear floor well. On fenders.T™ 9-710 30-31 BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) ‘Where Carried, Behind left rear seats. Behind left rear seats. Behind left rear seats. Center floor well. Hem Strap, web Strap, web (right front) Strap, web (right rear) © Tape, friction, 34 in. wide (30-ft roll) On right front fender. Top, canvas’ ~ 1 Bag, canvas 1 Behind left rear seats. Bow, top, front 1. Behind left rear seats. . Wire, soft iron, 14 goge,10 ft 1. -Center floor well. * long 4 31. VEHICLE ACCESSORIES, M16. a. Sighting Equipment. . Binocular, M3, complete, 1 On commander. composed of: 1 Binocular, M3 1.Case, carrying M17 ~ b. Signaling Eovipment. Antenna, complete w/cover Flag set, M238, composed of: 1 Right ‘of commander’s scat. 1 Case, CS-90 1 Flag, MC-273 (red) 1 Flag, MC-274 (orange) 1 Flag, MC-275 (green) 3 Flagstaff, MC-270 Radio set SCR 510 or 528 or 1 British No. 19 . ce. Rations. Type “C” 2-day rations for 60 Under gun mount base. 5 men, cans Type “D” 1-day-rations for 2 . Under gun mount base. Smen,cans. . 4, Pioneer Tools (fg. 41). Ax, (chopping, 5-Ib) 1 Outside, below right door. Crowbar, pinch point 60-in. 1 Rear fighting compartment. Mattock, Pick, with handle - 1 Outside, below left door. Shovel, short-handled. “1 Outside, below left door. e. Accessories and Miscellancous (fg. 40). Apparatus, decontaminating, 1 Left of driver’s seat. 1}4-qt, M2 (Spec. 197-54- 113) “ Applier, track chain 2° “Center floor well..TM 9-710 31-32 TOOLS AND EQUIPMENT STOWAGE ON THE VEHICLE Number fem Cerried Bag, tool 1 Bag, field, canvas O,D: M1936 5 Bolt, connector, side chain 8 (track chain repair) Bucket, canvas, folding 18-qt. 1 Bucket, water, galv. iron, 1 14-qt. Cable, towing (34-in. x 15-ft) 1 Canteen, M1910, with cup 5 and cover M1910 Chain, tire, front whee! 1 pr. (w/bag) (8.25 x 20) Chain, band track narrow, 1 pr. Container, water, 5-gal 2 (Q.M.C. Standard) Connector, side chain (track 8 chain repair) Envelope, waterproof 1 Extinguisher, fire (2-Ilb CO) 1 and bracket assembly Flashlight (Specification 3 17-197) * Gage, tire pressure 1 Gun, lubricating, pressure 1 (hand-operated) Key, map compartment 2 1 Kit, first aid 24-unit (Spec. 1553) Kit, tire repair, (hot patch w/clamp: 32, VEHICLE TOOLS AND a. Vehicle Spare Parts. Belt, fan, pair Body, elbow, fitting lubrica- ting, 90°, 14-in. Caps, valve, tire “Condenser, (distribution) and bracket (unassembled) Core, valve, tire Fitting, lubricating, straight, -in, Personnel Carrier M3AI. Where Camiod Center floor well. Top of front gas tanks. Center floor well. Behind driver's seat. Left rear outside. On front bumpers. On troops. Center floor well. Center floor well. Outside, engine cowl. ° Center floor-well. In glove compartment. Right of driver’s seat. In flashlight clips. Center floor well. Center floor well. In map compartment lock. Left side fighting compart- ment. Center floor well. SPARE PARTS, M3A1. wo 81 * Center floor well. Center floor well. Center floor well. Center floor well. Center floor well. Center floor well.™.9-710 32 BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND I) Numb Hem Car Where Carried Guide, track 4 Center floor well. Headlamp, service (spare) 1 Above left gas tank. Nut . 4 Center floor well. Pin, winch drive (when winch 6 Center floor well. equipped) Plug, pipe, }4in. 1 Center floor well. Plug, pipe, 14-in. 1 Center floor well. Spark plug, assembly 3 Center floor well. Washer, lock 4 Center floor well. b. Vehicle Tools (fig. 42). Brush, scratch, wire, painter’s 1 Center floor well. handled n, (14+in. sq_drive L Center floor well. in, long) Hammer, machinist, ballpeen 1 Center floor well. (32 02) Handle, socket wrench (wheel 1 Center floor well. bearing nut) Jack, assembly w/handle 1 Center floor well. (S-ton) Plier, combination, slip joint 1 Center floor well. (8-in.) Ratchet, reversible, (}4-in. 1 Center floor well. sq drive 9-in,) Screwdriver, common, 6-in. 1 Center floor well. blade Screwdriver, common, 8-in, 1 Center floor well. blade Screwdriver; special purpose, 1 Center floor well. 134-in. blade Wrench, adj.singleend,18-in. 1 Center floor well. (modified to 23%-in.’ open- ing) Wrench, eng. dble. hd. 3-in. 1 Center floor well. and 4-in. Wrench, ses dble, hd. %%¢-in. a Center floor well. and 5 wrench, eng. dble. hd. 34-in. 1 Center floor well. and 15%-in. Wrench, eng. dble. bd. 124-1 Center floor well. in, and 15%-in, (special) ; Wrench, socket, (3{-in. open- 1 Center floor well. ing, 14-in. drive) Wrench, spark plug Wrench, wheel bearing nut Wrench, wheel nut Center floor well. Center floor well. Center floor well.T™ 9-710 33 TOOLS AND EQUIPMENT STOWAGE ON THE VEHICLE 33. VEHICLE TOOLS AND SPARE PARTS, M16. a, Vehicle Spare Parts. Number tem Carried Whore Correg Beit, fan, pair 1 Center floor well. Body, elbow, fitting, lubr. 3 Center floor well. 90 deg., }4-in. Cap, valve, tire 5 Center floor well. Condenser, (distributor) and 1 Center floor well bracket (unassembled) Core, valve, tire 5 Center floor well. Fitting, lubricating, straight 6 Center floor well. Yin. Guide, track 4 Center floor well. Headlamp, service (spare) 1 In spare lamp brackets. Nut (for track guide) 4 Center floor well. Pin, winch drive 6 Center floor well. Plug, pipe, 14-in. 1 Center floor well. Plug, pipe, 4-in. 1 Center floor well. Plug, spark, assembly 3 Center floor well. Washer, lock 4 Center floor well. b. Vehicle Tools (fig. 42). Brush, scratch, wire, painter’s 1 Center floor well. handled Chisel, cold, 34-in. 1 Center floor well. Extension, Min. sq drive 1 — Center floor well. 10-in. long File, hand, smooth, 8-in. 1 Center floor well. File, 3-sq smooth, 6-in. i Center floor well. Hammer, machinist, ball peen 1 Center floor well. (32-02) Handle, socket wrench (wheel 1.— Center floor well. bearing, nut) Jack, assembiy w/handle 1 Center floor well. (5-ton) i Plier, combination, slip joint 1 Center floor well. (8-in.) Ratchet, reversible, 4in. sq 1 Center floor well. drive, 9-in. Screwdriver, common, 6-in. 1 Center floor well. blade Screwdriver, common, 8-in. 1 Center floor well. blade Screwdriver, special purpose, 1 Center floor well. 134-in. blade 83™ 9-710 33 BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) lorie ad va (ZW 499) uedo ‘sxueuysndusoy eBNMoss—seE 940614TM 9-710 33 TOOLS AND EQUIPMENT STOWAGE ON THE VEHICLE veal ad va Sejsosse22y 9/2149A—OY O46} 4 92078 HOLYNS—J (iva () SNIVHD Sal. 133HM INOW a1av2 ONIMOL—G NIVHD SNIMOL—> (lvd L) SNIVHD xOVval GNVe—@ dalldd¥ NIVHD XOVUL GNV8—VT™ 9-710 33 BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) Number tem Carried Where Carried Wrench, engr., dble. hd. 74-1 Center floor well. in. and }4-in. Wrench, engr. dble. hd. %- 1 Center floor well. in. and 5¢-in. Wrench, engr. dble. hd. 34-in, 1 Center floor well. and !3%-in. Wrench, engr. dble. hd. 14%- 1 Center floor well. in. and 19%-in. (special) Wrench, adj. single end, 18- 1 Center floor well. in. (modified to 23%-in.) Wrench, socket (34-in. open- 1 Center floor well. ing, }4-in. drive) Wrench, wheel bearing nut 1 Center floor well. Wrench, wheel nut 1 Center floor well. Wrench, spark plug 1 Center floor well. A-—CROSS-CUT SAW COVER — B-CROSS-CUT SAW C—SHOVEL D—STRAPS E-AXE F-MATTOCK RA PD 18348 Figure 41—Pioneer ToolsT™ 9-710 33 TOOLS AND EQUIPMENT STOWAGE ON THE VEHICLE Great ad va jueuidinby pun spooy 9)21y2A—zp 24nb14 DTN AS WO che vw a9™ 9-710 33 BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) suauidinby pun sjooy 912149,—zp 24nB14 404 puebeq deveal aa va DSresl ad va ova 1001-88 JIGNVH HONRIM LAN ONIIV3a—W¥ HONaYM LAN ONIV3d 133HM LNOY—Z YAARIGMIYIS—A HON]YM INN ONINWIS GNH 1axDOYdS JIXV YvRI—X HONRYM ONid NIVEO-M. NYD1I0—A _ $’and—n HONRYM ON1d WY¥dS—L +. WAldva¥ GNV Nn® aliwaqv—-S (ONILLId GV3H NOLIN) YaidvavsNNO aLIwaly—a Nid YV3HS L4VHS JARId HONIM—O. (OD) Y3HSINONULXA 3¥ld—d “NI 9L/Z* “NI 8/E—HIN3YM ON3-318NOd~O. “NI 2€/6L-* “NI Z/I-HONZYM GN3-318NOG-N “NE 9L/LL * “NI 9L/6-HINIYM ON3-318NOG—W “NI Z€/S% * “NI 8/S—HINIYM ON3-318NOG—1 “NI 8/2 * "NI ¥/E-HDN3YM ONI-3ISNOG—% HONI ZI-HINIYM JlavisNfay—r HONI 8I—-HDNadM J1SVLSNFOY—H ‘ ‘ waWWVH—-9 HON3YM 13xD0S LAN Wd JTGNVH HON3IM LON WI-F JIONVH 4DVf—d OVE DNNWIGAH—F 4HON NOND3dSNI—9 dwWNd Ja—-VT™ 9-710 33 TOOLS AND EQUIPMENT STOWAGE ON THE VEHICLE vlopie ad va (EW 4014425 jouuosseg) ued ‘sjuou4sndwo0 7 ebomois—ep o4nBiy™ 9-710 33 BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) RA PD 314015 Figure 44—Stowage Compartments, Open (81-mm Mortar Carrier M4A1)T™ 9-710 TOOLS AND EQUIPMENT STOWAGE ON THE VEHICLE 9lovie ad va (@6n]4409 sosow uND wul-gZ) uedE ‘ssudUIZsDdUICD eBOMOIS—Syp O4nbiy 1T™M 9-710 33 BASIC HALF-TRACK VEHICLES (WHITE, and DIAMOND T) AUTOCAR, Ztovte Gd va (S1W e60}11n3 s0j0w UND 2di4ynW) UEdO ‘suoupsnduroy eBamoss—oy o1nB}4 92™ 9-710 TOOLS AND EQUIPMENT STOWAGE ON THE VEHICLE ‘glovis ad va (9LW eBn}4409 s0s0w UND adysny) UEdO ‘sjuauIysBdUIED eBEMOIS—zy 24nB}y™ 9-710 33 BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) RA PD 314019 Figure 48—Stowage Compartments, Open (81-mm Mortar Carrier M21)T™M 9-710 34-36 PART TWO—VEHICLE MAINTENANCE INSTRUCTIONS Section IX RECORD OF MODIFICATIONS AND NEW VEHICLE RUN-IN TESTS Paragraph MWO aind major unit assembly replacement record 34 Purpose of run-in test. 35 Correction of deficiencies 36 Run-in procedures ... 37 34. MWO AND MAJOR UNIT ASSEMBLY REPLACEMENT RECORD. a. Description. Every vehicle is supplied with a copy of A.G.O. Form No. 478 which provides a means of keeping a record of each MWO (FSMWO) completed or major unit assembly replaced. This form includes spaces for the vehicle name and US:A. Registration Number, instructions for use, and information pertinent to the work. to be accomplished. It is very important that the form be used as di- rected, and that it remain with the vehicle until the vehicle is removed from service. b. Instructions for Use. Personnel performing modifications or major unit assembly replacements must record clearly on the form a description of the. work completed, and must initial the form in the columns provided. When each modification is completed, record the date, hours and/or mileage, ‘and MWO number. When major unit assemblies, such as engines, transmissions, transfer cases, are replaced, record the date, hours and/or mileage and nomenclature of the unit assembly. Minor repairs and minor parts and accessory replacements need not be recorded. ec. Early Modifications. Upon receipt by a third or fourth echelon repair facility of a vehicle for modification or repair, maintenance personnel will record the MWO numbers of modifications applied prior to the date of A.G.O. Form No. 478. 35. PURPOSE OF RUN.IN TEST. a. When a new or reconditioned. vehicle is first received at the using organization, it is necessary for second echelon personnel to de- termine whether or not the vehicle will operate satisfactorily when placed in service. For this purpose, inspect all accessories, subassem- blies, assemblies, tools, and equipment to see that they are in place and correctly adjusted. In addition, they will perform a run-in test of at least 50 miles as directed in AR 850-15, paragraph 25, table IIT, according to procedures in paragraph 37 below. 36. CORRECTION OF DEFICIENCIES. a. Deficiencies disclosed during the course of the run-in test will be treated as follows: 8TM. 9-710 36-37 BASIC HALF." TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) (1) Correct any deficiencies within the scope of the-maintendnce . echelon of the using organization before the vehicle is placed in service, .(2) Refer deficiencies beyond the scope of the’ maintenance echelon of the using organization to a higher echelon for correction. (3) Bring deficiencies of serious 0 nature to the attention of the supplying organization. ¢ ~ RUN-IN TEST PROCEDURES. : a. Preliminary Service. (1) Fire ExtincvisuEr. See-that portable extinguisher is present and in good condition. Test it. momentarily for Proper operation, and * mount it securely. (2)- Fue, On, and Warer. Fill fuel tank, Check crankcase oil and coolant supply, and add as necessary to bring to correct levels. Allow room for expansion in fuel tank and radiator. During freezing ‘weather, test value of antifreeze and add as necessary to protect cool- ing system against freezing. CAUTION: If there is a tag attached to filler cap or steering wheel concerning.engine oil in crankcase, follow instructions on tag before driving the vehicle. . (3). Fur FILrer. Inspect fuel filter for leaks, damage, secure “mountings, and’ connections: Drain filter sediment bowL: If any ap- -preciable amount of water-or dirt is present, remove bowl, arid clean bow!l.and element in dry-cleaning solvent. Also drain accumulated water or dirt from ‘bottom of fuel tank. Drain only till fuel runs clean. 4). .BaTTEry. Make hydrometer and voltage test of battery and level electrolyte to ¥% inch above plates with clean water if necessary. °(3) Air CLEANER AND BREATHER Cap. “Examine carburetor air ‘leaner and crank case breather cap to-see if they are in -good’ con- dition and secure; Remove oil cup, wash-out in’ dry-cleaning solvent and refill reservoir to proper depth with-fresh oil. On vehicles equipped with hydrovac brake. booster, remove hair element, wash thoroughly in dry-cleaning solvent and saturate with engine oil. Replace hair in cleaner and reassemble: (6) ACCESSORIES AND BELTS, See that accessories ‘sucti as carbu- retor, generator, regulator, cranking motor, distributof, water pump, fan and oil filters are securely mounted, and that fan and generator drive belts are in good condition and adjusted to have Vs-inch de- flection. (7) Evecrric Wirina. Examine all accessible wiring and conduits to see if they are in good condition, securely. connected, and properly supported. (8) ‘Tires, Inspect for flat tires, damage, cists or foreign matic: embedded in tread. Proper-pressure is 50 pounds. Remove stones or debris from tracks and track. suspensions. (9) WHEEL AND FLANGE Nuts. Observe whether or not wheel axle and jack shaft flange nuts are present and tight. ‘See that track - suspension mechanism nuts are present and tight. (10) Fenvers anp Bumpers. Inspect fenders and bumpers for looseness or damage. 96™ 9-710 a7 RECORD OF MODIFICATIONS AND NEW VEHICLE RUN-IN TESTS (11) Towinc Connections, Inspect pintle hook, trailer brake, and light socket attachments for serviceability. (12) Bony anp Tarpauin, Inspect body for damage and tarpaulin for security. (13) WincH. When vehicle is so equipped inspect winch for dam- age, secure mountings and oil leaks. Test winch clutch mechanism: for proper operation, Test drag brake to see if it holds drum from spinning and as cable is unwound; inspect it for wear, damage, and adequate lubrication, Test winch automatic brake by placing vehicle at top of steep incline, and attaching cable to another vehicle at bottom. While drawing towed vehicle up hill, release engine clutch; if towed vehicle backs down hill, brake needs adjustment. Start lowering vehicle down hill with winch; throw out engine clutch; if towed vehicle does not stop or drifts more than ohe or two inches, brake needs adjustment. See paragraph 37 b (3). Alter test, rewind cable evenly and tightly on drum and while winding, clean cable thoroughly and apply a film of engine oil, . (14) Armor anp Front Router. Inspect all armor, armor shields, door and windshield, for good condition and secure mounting. Also see that front roller, when vehicle is so equipped, is securely mounted and can be revolved. (15) Lusrrcare, Perform a complete lubrication of the vehicle, covering all intervals, according to the instructions in the Lubrication Guide, paragraph 23, except gear cases, wheel bearings, and other units covered in preceding procedures, Check all gear case oil levels, and add, as necessary, to bring to correct level; change only if condition of oil indicates the necessity, or if gear oil is not of proper grade for existing atmospheric temperature. NOTE: Perform items (16) to (19) during lubrication. (16) _ Sprives AND SusPENSIONS. Inspect front shock absorbers, front and rear springs, and rear bogie suspension volute spring seats, to see if all are in good condition, correctly assembled, and secure. Check for excessive leaks, (17) STEERING LinKAGE. See that all steering arms, rods, and con- nections are in good condition and secure; and that gear case is securely mounted and not leaking excessively. (18) PRoPELLER SHAFTS, AND UNIVERSAL JoINrs, Inspect all shafts, and universal joints to see if they are in good condition, correctly assem- bled, alined, secure, and not leaking excessively at seals or vents. Be sure vent passages are not clogged. (19) AXLE AND TRANSFER VENTS. See that axle housing and trans- fer case vents are present, in good condition, and not clogged. (20) Coxe. Examine choke to be sure it opens and closes fully in response to operation of choke button, (21) ENGINE WarM-uP. Start engine, noting if cranking motor action is satisfactory, and any tendency toward difficult starting. Set hand throttle to run engine at fast idle during warm-up. Reset choke button so engine will run smoothly, and to prevent overchoking and oil dilution. 7™ 9-710 37 BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) (22) INSTRUMENTS. (a) Oil Gage. Immediately after engine starts, observe if oil pres- sure is satisfactory. Normal operating pressure, hot is 30 to 35 pounds, and should not fall below 10 pounds at idle. (&) Ammeter, Ammeter should show a high charge for short period after starting, and zero, or slight positive reading, above 12 to 15 miles per hour with lights and accessories off. (c) Temperature Gage. Temperature should rise slowly during warm-up. Normal operating temperature 160°F to 185°F. CAUTION: Do not operate engine over 2,000 revolutions per minute until cooling system temperature has reached 160°F. (d) Fuel Gage. Fuel gage must show approximate amount of fuel in tanks according to position of toggle switch. (e) Voltmeter, Voltmeter should show a reading of not less than 12 volts with engine stopped and no load on battery, An excessive drop (more than 2 or 3 volts under heavy load) will indicate battery or connection faults. (f) Tachometer. Tachometer must indicate engine speed without excessive fluctuation or unusual noise. (é) Compass. Inspect compass for true indication of magnetic north by comparing with known direction or with a compass of known accuracy. See paragraph 165 b for instructions for compensating. (23) ENcmve Controts. Observe if engine responds properly to controls and if controls operate without excessive looseness or binding. (24) Horn anp WINDSHIELD WIPERS. See tliat these items are in good condition and secure. If tactical situation permits, test horn for proper operation and tone. See if wiper arms will operate through their full range, and that blade contacts glass evenly and firmly, (25) GLass aND REAR ViEwW Mirrors. Clean all body glass and mirrors and inspect for looseness and damage. Adjust rear view mirrors for correct vision. (26) Lamps (LIGHTS) AND REFLECTORS. Clean lenses and inspect alt units for looseness and damage. If tactical situation permits, open and close all light switches to see if lamps respond properly. (27) LEAKS, GENERAL. Look under vehicle, and within engine com: partment, for indications of fuel, oil, coolant, and brake fluid leaks. ‘Trace any found to source and correct or report them. (28) Toots anv Equipment. Check tools and On Vehicle Stowage Lists, paragraphs 24 to 33, to be sure all items are present, and see that they are serviceable and properly mounted or stowed. b. Run-in Test. (1) Dash InsrRuMENTS AND GaGES. Observe all instruments frequently, noting whether or not they operate within the prescribed limits, temperatures, and pressures. (2) SPEEDOMETER. When vehicle is in motion, speedometer must show vehicle speed, accumulating trip mileage, and total mileage. In- dicator hand should move steadily without unusual noise. (3) Brakes, Foot anp Hann. Test service brakes to see if they stop vehicle effectively without side pull, chatter, or squealing. Pedal 98™ o710 RECORD OF MODIFICATIONS AND NEW VEHICLE RUN-IN TESTS should have }4 reserve travel. Parking brake must hold vehicle on a reasonable incline with ¥-ratchet travel in reserve. (4) Cuurcu. Make sure that clutch operates smoothly without chatter, grabbing, or slipping, and pedal has 12-inch free travel. (5) TRANSMISSION AND TRANSFER. Gearshift mechanism should operate without unusual noise, and not slip out of mesh, Test front axle declutching, and power take-off mechanism (on vehicles so equip- ped) for proper operation. (6) STEERING. Observe steering action for binding or looseness, and note any excessive pull to one side, wander, shimmy, or wheel tramp. See that column bracket and wheel are secure, Pay particular attention to Pitman arm to see that it is secure, (7) _ Enaive. Be on alert for any abnormal engine operating char- acteristics or unusual noise such as lack of pulling power or accelera- tion; backfiring, misfiring, stalling, overheating, or excessive exhaust smoke, (8) Unusvat Norse. Be on the alert throughout road ‘test for any unusual noise from body and attachments, running gear, suspen- sions or wheels, that might indicate looseness, damage, wear, inadequate lubrication, or underinflated tires. (9) Hatt VEHICLE AT 10-MILE INTERVALS FOR SERVICES (10) TO (13) Betow. (10) Brake Booster OPERATION. With engine idling and vehicle stopped, depress brake slowly and note whether or not the booster can be felt assisting the movement of the pedal. On hydrovae, locate air cleaner and listen for air movement while pedal is being operated. (11) Temperatures. Cautiously hand-feel each brake drum and wheel hub for abnormal temperatures, Examine transmission, transfer case, and differential housings for indications of overheating and ex- cessive lubricant leaks at seals, gaskets, or vents. NOTE: Transfer case temperatures are normaily higher than other gear cases. (12) Leaks. With engine running, and fuel, engine oif, and cooling systems under pressure, look within engine compartment and under vehicle for indications of leaks. (13) Guw ELEVATING AND TRAVERSING MECHANISM. Inspect skate mount, machine gun carriage, pintles and controls to see that they operate without any binding, excessive lash, or erratic action, and are securely mounted. (14) Track TENston. Inspect track tension for sag of 34 inch mid- way between top roller and idler with 150-pound pressure on top of track. e. Vehicle Publications and Reports. (1) Pustications. See that vehicle (Technical Manuals, Lubri- cation Guide, Standard Form No. 26—Driver’s Report Accident, Motor Transportation and W.D., AG.O. Form 478—MWO and Major Unit Assembly Replacement Record), are in the vehicle, legible, and properly stowed. NOTE: U. S. A. registration number and vehicle no- menclature must be filled in, on Form No, 478 for new vehicles. (2) Reports. Upon completion of the Run-in Test, correct, or report, any deficiencies noted. Report general condition of the vehicle to designated individual in authority, 99TM 9-710 38-39 BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) Section X ORGANIZATION TOOLS AND EQUIPMENT Paragraph 38 39 Organization standard tool sets Special tools............ 38. ORGANIZATION STANDARD TOOL SETS. a. The organization standard tool sets are listed in SNL N-19. The availability of these sets to an organization can be found in the appli- cable Table of Equipment. WATER PUMP BOGIE VOLUTE WHEEL BEARING IMPELLER PULLER — SPRING COMPRESSOR NUT WRENCH FAN WRENCH HANDLE LOWER PULLEY PULLER RA PD 314020 Figure 49—Special Tools 39. SPECIAL TOOLS. a. Special tools are listed in the Organizational Spare Parts and Equipment Lists of the pertinent SNL’s, as follows: Mfrs. Federal Name Tool Stock No. Number Fan lower pulley puller....... RSC 249 41P 2907-150 Water pump impeller puller... RSB 364 41P 2958-60 Wheel bearing nut socket wrench ....... 41W 2612-25 Bogie yolute spring compressor (2).....0e0e0-. 0 cee eees 41C 2559-50 100T™ 9-710 40 Section XI ORGANIZATIONAL PREVENTIVE MAINTENANCE * SERVICES Paragraph Second echelon preventive maintenance services.......... 40 40. SECOND ECHELON PREVENTIVE MAINTENANCE SERVICES. a, Regular scheduled maintenance inspections and services are a preventive maintenance function of the using arms and are the re- sponsibility of commanders of operating organizations. (1) Frequency. The frequencies of the preventive maintenance services outlined herein are considered a minimum requirement for normal operation of vehicles. Under unusual operating conditions such as extreme temperatures, dusty or sandy terrain, it may be necessary to perform certain maintenance services more frequently. (2) First EcHELon Participation, The drivers should accom- pany their vehicles and assist the mechanics while periodic second echelon preventive maintenance services are performed. Ordinarily the driver should present the vehicle for a scheduled preventive main- tenance service in a reasonably clean condition; that is, it should be dry and not caked with mud or grease to such an extent that inspection and servicing will be seriously hampered. However, the vehicle should not be washed or wiped thoroughly clean, since certain types of defects, such as cracks, leaks, and loose or shifted parts or assemblies, are more evident if the surfaces are slightly soiled or dusty. (3) _If instructions other than those contained in the general pro- cedures in step (4) below, or the specific procedures in step (5) which follows, are required for the correct performance of a Preventive Maintenance Service, or for correction of a deficiency, other sections of the vehicle Operator's Manual pertaining to the item involved, or a designated individual in authority, should be consulted, (4) GENERAL ProcepurEs. These general procedures are basic instructions which are to be followed when performing the services on the items listed in the specific procedures. NOTE: The second echelon personnel must be thoroughly trained in these procedures so that they will apply them automiatically. (a) When new, or overhauled, subassemblies are installed to cor- rect deficiencies, care should be taken to see that they are clean, cor- rectly installed, properly lubricated, and adjusted. (6) . When installing new lubricant retainer seals, a coating of the lubricant should be wiped over the sealing surface of the lip of the seal. When the new seal is a leather seal, it should be soaked in SAE No. 10 engine oil (warm if practicable) for at least 30 minutes. Then, the leather lip should be worked carefully by hand before installing the seal. The lip must not be scratched or marred. (c) ‘The general inspection of each item applies also to any sup- porting member or connection, and. usually includes a check to seeT™ 9-710 40 BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) whether or not the item is in good condition, correctly assembléd, se- cure, or excessively worn. The mechanics must be thoroughly trained in the following explanations of these terms. 1. The inspection for “good condition” is usually an external visual inspection to determine whether or not the unit is damaged beyond safe or serviceable limits and is explained further by the following: not bent or twisted, not chafed or burned, not broken or cracked, not bare or frayed, not dented or collapsed, not torn or cut. 2. The inspection of a unit to see that it is “correctly assembled” . is usually an external visual inspection to see whether or not it is in its normal assembled position in the vehicle. 3. The inspection of a unit to determine if it is “secure” is usually an external visual examination, a hand-feel, or a pry-bar check for looseness, Such an inspection should include any brackets, lock washers, lock nuts, locking wires, or cotter pins used in assembly. _ 4. “Excessively worn” will be understood to mean worn close-to or beyond serviceable limits, and likely to result in a failure if not re- placed before the next scheduled ‘inspection, (d) Special Services. These are indicated by repeating the item numbers in the columns which show the interval at which the services are to be performed, and show that the parts or assemblies are to re- ceive certain’ mandatory services, For example, an item number in one or both columns opposite a “TIGHTEN?” procedure, means that the actual tightening of the object must be performed. The special services include: 4. Adjust. Make all necessary adjustments in accordance with the Pertinent section of the vehicle Operator's Manual, special bulletins, or other current directives, .2. Clean, Clean units of the vehicle with dry-cleaning solvent to remove excess lubricant, dirt, and other foreign material. After the parts are cleaned, rinse them in clean fluid and dry them thoroughly. Take care to keep the parts clean until reassembled, and be certain to keep cleaning fluid away from rubber or other material which it will damage. Clean the protective grease coating from new parts since this material is not a good lubricant. 3, Special Lubrication. This applies either to lubrication opera- tions that'do not appear on the vehicle lubrication chart and to items that do appear of such charts, but should be performed in connection with the maintenance operations if parts have to be disassembled for inspection or service. 4, Serve: This usually consists of performing sp operations, such as replenishing battery water, draining and ‘refilling units with oil, and changing the oil filter cartridge. 5. Tighten. All tightening operations should be performed with sufficient wrench torque (force on the wrench handle)-to tighten the unit according to good mechanical practice. Use torque-indicating wrench where specified. Do not overtighten, as this may strip threads or cause distortion. Tightening will always be understood to include the correct installation of lock washers, lock nuts, and cotter pins provided to secure the tightening. 102™ 9-710 40 ORGANIZATIONAL PREVENTIVE MAINTENANCE SERVICES (e) When conditions make it difficult .to perform the complete Preventive Maintenance Procedures at one time, they can sometimes be handled in sections, planning to complete all operations within the week, if possible, All available time at halts, and in bivouac areas must be utilized to assure that maintenance operations are completed. When limited by the tactical situation, items with Special Services in the columns, should be given first consideration. (4) The numbers of the preventive maintenance procedures that follow are identical with those outlined on W.D. AGO Form No, 461, which is the “Preventive Maintenance Service Work Sheet” for wheeled and half-track vehicles, Certain items on the work sheet that do not apply to this vehicle are not included in the procedures in this manual. In general, the numerical sequence of items on the work sheet is fol lowed in the manual procedures, but in some instances, there is devia- tion for conservation of the mechanic’s time and effort. (5) Speciric Procepures. The procedures for performing each item in the 1,000-mile (monthly) and 6,000-mile (six-month) mainte- nance procedures are described in the following chart. Each page of the chart has two columns at its left side corresponding to the 6,000-mile and 1,000-mile maintenance respectively. Very often it will be found that a particular procedure does not apply to both scheduled mainte- nances. In order to determine which procedure to follow, look down the column corresponding to the maintenance due, and wherever an item number appears perform the operations indicated opposite the number. ROAD TEST maintenance |] NOTE: When tactical situations do not permit a woo | wo | fudl road test, perform those items which require Mie | Mile | Jittle or no movement of the vehicle. When a road test is possible, it should be 4, preferably 5, and not over 10 miles. 1| 1] Before-operation Service. Perform the Before-oper- ation Service as described in paragraph 18. 3 3] Instruments and Gages, FUEL Gace, Fuel gage must show approximate amount of fuel in tanks according to position of toggle switch. Ort PREssuRE GAGE. If pressure fails to register within 30 seconds, stop engine, and correct or report. At normal vehicle operating speed, pressure should be about 20 to 35 pounds. Pressure should not fall below 4 pounds at idle. ENGINE TEMPERATURE INDICATOR. Temperature should tise slowly during warm-up. Normal operating tem- perature 155°F to 185°F. CAUTION: Do not operate engine over 2,000 revolutions per minute until cooling system temperature has reached 160°F. Ammerer. Ammeter should show a high charge for short period after starting, and zero or slight positive (4) reading above 12 to 15 miles per hour with lights 103T 9-710 40 BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) WANTBUNGE] and accessories “OFF.” A zero reading with lights and ‘wor | im | accessories “ON” is normal. Mi_| Mit | TacHOMETER. Tachometer must indicate engine speed without excessive fluctuation or unusual noise. SPEEpomETER. Speedometer must show vehicle speed, accumulating trip mileage, and total mileage. Indicator hand should move steadily without unusual fluctuation. Compass. Inspect compass for true indication of mag- netic north by comparing with known direction or with compass of known accuracy (par..165). 4] 4] Horns, and Windshield Wipers. When tactical situa- tion permits, test horns. Operate windshield wipers. In- spect for complete contact throughout full are of ‘operation. 5| s| Brakes (Foot, Hand, and Trailer). Foot brakes must stop vehicle safely at fast rate, within reasonable ‘distance. Brake pedal must have moderate, but not “hard” or “spongy” feel, Brakes must not pull vehicle to one side. Listen for unusual noise or chatter. Pedal should have one-third reserve travel. Hand brake, when set, must hold vehicle effectively on grade. One-quarter the ratchet travel should be reserve. Observe trailer brake operation when control switch is at light, medium, and heavy load settirigs, to determine whether or not operation is adequate, whether or not there is any un- usual noise, side ‘sway, or indication of unequalized brake action. 6. 6| Clutch. Test for grab, drag, chatter, or. noise that might indicate faulty adjustment, defective clutch parts, or dry release bearing. Pedal should have free travel of 1 to 144 inch before meeting resistance. While running at low speed in high gear, depress accelerator fully, at same time applying brakes slightly, and ob- : serve if clutch appears to slip. 7| 7| Transmission, Transfer, and Power Take-off. With vehicle in- motion, shift through entire gear range. See that shifter mechanism operates freely without clashing, or jumping out of gear; that locking mecha- nism in transfer operates freely. Observe for unusual vibrations that might indicate loose mountings. Listen for unusual noises. 8| 8| Steering. With the vehicle in motion, move steering wheel fully in both directions, observing for any loose- ness or binding. Test for wander, shimmy, or side pull, 5 while vehicle is operated at normal speeds. 9| 9] Engine. During road test, note any tendency of the engine to stall while decelerating to shift gears. Ob- serve if engine has normal acceleration and pulling power in each speed when shifting through gear range from first to high. Make similar observation in high 104™ 9-710 40 ORGANIZATIONAL PREVENTIVE MAINTENANCE SERVICES MAINTENANCE uot | tooo ie { te 10 | 10 ny) 13] 13 14| 14 1s | 15 16 | 16 17} 17 |) gear from low speed with wide-open throttle. During this operation, note any unusual engine noises, such as excessive “ping,” which may indicate early timing, or too low octane fuel. Listen for other noises that might indicate damaged, excessively worn, or inadequately lubricated engine parts, accessories, or loose drive belts. Engine Noises. Be-alert for any unusual noise that may indicate looseness, damage, or excessive wear in body, wheels, tracks, suspension assembly, attachments and equipment. Brake Booster Operation, Hydrovae. Test brakes to learn whether or not vacuum power unit assists in application. A quick test is to stop vehicle, with engine running, and listen for air movement in the Hydrovac air cleaner, while the brake pedal is being operated. Temperatures. After completing road test run, feel brake drums and wheel hubs, cautiously, for abnormal temperatures. Cautiously feel front axle, jackshaft, transmission, and transfer for overheating. If excessive heat is found, cause should be investigated. Transfer normally operates at higher temperatures than other units, . Leaks. Look within engine compartment and under vehicle for engine oil, water, fuel, and brake fiuid leaks. Determine source and correct. Track Tension. Inspect track tension. There should be 3{- to l-inch sag midway between top roller and idler with 150-pound pressure on top of track (par. 117). Vehicle should have normal load. Gear Oil Level and Leaks. Examine front axle, jack- shaft, transmission, transfer, and power take-off for lubricant level and leaks. NOTE: The safe level range is from the lower edge of the filler hole, when. hot, to one-half inch below, when cold. When a change of oil in these units is due, drain and refill with specified lubricant. MAINTENANCE OPERATIONS Raise Vehicle and Block Safely. Unusual Noises. With engine running, accelerate and decelerate engine momentarily, and listen for unusual noises that might indicate damaged, loose; or exces- sively worn engine parts, drive belts, or accessories. Locate and correct, or report, any unusual engine noises heard during road test. With transmission in third gear, operate transmission, transfer, propeller shafts, U-joints, front axle and jackshaft at constant moderate speed by use of hand throttle. Test for any unusual noise that might indicate damaged, loose, or 105T™M 9-710 40 BASIC HALF-TRACK VEHICLES (WHITE, AUTOCAR, and DIAMOND T) MAINTENANCE | ao [1000 lle | Mite 18] 18 20 20 21 22) 22 22 23} 23 24) 24 24 25| 25 excessively worn parts. Observe for vibrations which may indicate looseness or lack of balance. Locate, cor- rect, or report any faults indicated by noise during toad test. Cylinder Head and Gasket. Examine for cracks or indications of oil, water, or compression leaks around cap screws and gaskets. CAUTION: Cylinder heads should not ordinarily be tightened unless there is definite indication of looseness or leaks. Spark Plugs. Wipe off and examine insulators without removing plugs. Wipe shields and reinstall. Cuan anv Apjust. Remove plugs, clean in an abrasive cleaner, inspect for cracked insulators and burned electrodes. Adjust gap to 0.025 inch. NOTE: Test compression before installing plugs. Compression Test. Normal compression is 120 pounds at normal cranking speed; should not vary more than 10 pounds between cylinders. Pressure on any cylinder should not drop below 90 pounds. Battery. Examine case for leaks. Clean and dry cables and terminals. Grease terminals-and posts lightly, and tighten terminals. Tighten hold-down and clamping bolts, if loose. CAUTION: Tighten bolts carefully to avoid breaking battery case. Test specific gravity reading. Record readings on W.D., A.G.0, Form No. 461. Reading of less than 1.225 indicates need for recharge. Bring electrolyte level to 14 inch above plates. NOTE: Fill to top of filler well with cap mounted on vent hole. HicH Rate DIscHaRGE Test. Make a high rate dis- charge test of battery. Report if difference in reading between cells is more than 30 percent. Crankease. Inspect crankcase, valve covers, timing gear cover, and clutch housing for oil leaks, and check oil level. NOTE: When an oil change is due, drain crankcase and refill with specified oil. Do not start engine again until item No. 24 is completed. Oil Filter. Inspect oil filter for leakage or loose mount- ings. Renew Fitter ELemenr. Remove filter element. Clean oil filter case and install new filter cartridge. Be sure to check for oil leaks after starting engine. CAUTION: In refilling crankcase, when installing new oil filter, allow sufficient additional oil to wet new filter cartridge completely. Radiator. Observe cooling system, including radiator, hose, and surge tank, for good condition, secure mount- ing, or leakage. Examine coolant for contamination. If 106