M939 M939A1 M939A2 Series 5-Ton 6×6 Military Truck Repair Parts and Special Tools List TM 9-2320-272-24P-1

Description

The M939 M939A1 M939A2 Series 5-Ton 6×6 Military Truck Repair Parts and Special Tools List TM 9-2320-272-24P-1

Serves as the complete technical authority for parts identification, ordering, and field maintenance across the entire family of United States military 5-ton tactical diesel vehicles. Issued jointly by Headquarters, Departments of the Army and the Air Force under technical manual designations Army TM 9-2320-272-24P-1 and Air Force TO 36A12-1C-1155-4-1, this manual provides detailed exploded assembly drawings, National Stock Numbers (NSN), Commercial and Government Entity (CAGEC) codes, manufacturers part numbers, and Source, Maintenance, and Recoverability (SMR) codes. Whether maintaining an active fleet vehicle, overhauling a surplus military chassis, or restoring a private collector truck, this publication gives technicians and parts managers the exact breakdown of every component down to individual washers, shims, seals, and brackets.

File Details

• Document Type: Repair Parts and Special Tools List (RPSTL)
• Manual Designation: Army TM 9-2320-272-24P-1 / Air Force TO 36A12-1C-1155-4-1
• Publishing Authority: Headquarters, Departments of the Army and the Air Force
• Publication Date: 27 August 2012
• Supersedure: Supersedes TM 9-2320-272-24P-1, TM 9-2320-272-24P-2, TO 36A12-1C-1155-4-1, and TO 36A12-1C-1155-4-2 dated 1 February 1999
• Total Scope: Covers 675 Work Packages structured across 3 Volumes, including 148 preliminary/index pages
• Language: English
• File Format: Portable Document Format (PDF)

Vehicle Configurations & Usable On Code (UOC) Breakdown

This repair parts manual utilizes specific Usable On Codes to identify components tailored to particular body styles, drive options, and production evolutions across the M939 M939A1 M939A2 Series 5-Ton 6×6 Military Truck family:

• Dropside Cargo (5-Ton, 6×6): M923 (NSN 2320-01-050-2084, UOC V15), M923A1 (NSN 2320-01-206-4087, UOC DAW), M923A2 (NSN 2320-01-230-0307, UOC ZAA), M925 with winch (NSN 2320-01-047-8769, UOC V14), M925A1 with winch (NSN 2320-01-206-4088, UOC DAX), and M925A2 with winch (NSN 2320-01-230-0308, UOC ZAB).
• Extra Long Wheelbase Cargo (5-Ton, 6×6 XLWB): M927 (NSN 2320-01-047-8771, UOC V17), M927A1 (NSN 2320-01-206-4089, UOC DAC), M927A2 (NSN 2320-01-230-0309, UOC ZAC), M928 with winch (NSN 2320-01-047-8770, UOC V16), M928A1 with winch (NSN 2320-01-206-4090, UOC DAD), and M928A2 with winch (NSN 2320-01-230-0310, UOC ZAD).
• Dump Truck (5-Ton, 6×6): M929 (NSN 2320-01-047-8756, UOC V20), M929A1 (NSN 2320-01-206-4079, UOC DAE), M929A2 (NSN 2320-01-230-0305, UOC ZAE), M930 with winch (NSN 2320-01-047-8755, UOC V19), M930A1 with winch (NSN 2320-01-206-4080, UOC DAF), and M930A2 with winch (NSN 2320-01-230-0306, UOC ZAF).
• Tractor Truck (5-Ton, 6×6): M931 (NSN 2320-01-047-8753, UOC V22), M931A1 (NSN 2320-01-206-4077, UOC DAG), M931A2 (NSN 2320-01-230-0302, UOC ZAG), M932 with winch (NSN 2320-01-047-8752, UOC V21), M932A1 with winch (NSN 2320-01-205-2684, UOC DAH), and M932A2 with winch (NSN 2320-01-230-0303, UOC ZAH).
• Expansible Van (5-Ton, 6×6): M934 (NSN 2320-01-047-8750, UOC V24), M934A1 (NSN 2320-01-205-2682, UOC DAJ), and M934A2 (NSN 2320-01-230-0300, UOC ZAJ).
• Medium Wrecker (5-Ton, 6×6): M936 (NSN 2320-01-047-8754, UOC V18), M936A1 (NSN 2320-01-206-4078, UOC DAL), and M936A2 (NSN 2320-01-230-0304, UOC ZAL).

Chapters Covered

The manual is structured into comprehensive functional work packages reflecting the standard military parts catalog organization:

• Introduction & User Guide: SMR code definitions, cross-reference index instructions, and requisitioning guidelines (WP 0001)
• Group 0100 Engine Assembly: Engine and container assemblies, lifting brackets, and isolator mounts for M939, M939A1, and M939A2 variants (WP 0002 to WP 0007)
• Group 0101 Crankcase, Block, & Cylinder Head: Cylinder blocks, cylinder sleeves, liners, heads, gaskets, mounting studs, and access plates (WP 0008 to WP 0012)
• Group 0102 Crankshaft: Crankshaft assemblies, thrust washers, standard and undersize sleeve bearing halves, and vibration dampers (WP 0013 to WP 0014)
• Group 0103 Flywheel Assembly: Flywheel housings, ring gears, flexplates, crankshaft adapters, and rear covers (WP 0015 to WP 0017)
• Group 0104 Pistons & Connecting Rods: Pistons, piston pins, retaining rings, compression and oil control ring sets, connecting rods, and rod bearings (WP 0018 to WP 0019)
• Group 0105 Valves, Camshafts, & Timing System: Timing gear covers, camshafts, drive gears, pushrods, cam followers, intake and exhaust valves, springs, guides, and rocker arms (WP 0020 to WP 0030)
• Group 0106 Engine Lubrication System: Oil pumps, dipsticks, oil pans, oil coolers, filter assemblies, supply tubes, and crankcase breathers (WP 0031 to WP 0041)
• Group 0108 Manifolds: Intake manifolds, intake connections, and exhaust manifold sections with locking hardware (WP 0042 to WP 0044)
• Group 0109 Accessory Driving Mechanisms: Accessory drive pulleys, couplings, and tachometer access plates (WP 0045 to WP 0046)
• Group 0301 Carburetor & Fuel Injector: Fuel injectors, nozzles, barrel and plunger assemblies, copper sleeves, and injector hold-down clamps (WP 0047 to WP 0048)
• Group 0302 Fuel Pump: Fuel injection pumps, AFC and VS governor assemblies, transfer pumps, gear pumps, control racks, and delivery lines (WP 0049 to WP 0061)
• Group 0304 Air Cleaner: Air cleaner housings, filter elements, restriction minders, brackets, ducts, and intake stacks (WP 0062 to WP 0064)
• Group 0305 Supercharger & Turbocharger: Turbocharger assemblies, diffuser housings, turbine wheels, oil feed lines, and charge air hoses (WP 0065 to WP 0066)
• Group 0306 Tanks, Lines, Fittings, & Headers: Single and dual fuel tank mounting straps, crossover tubes, tank selector valves, and supply/return lines (WP 0067 to WP 0084)
• Group 0308 Engine Speed Governor & Controls: Fuel pump spring packs, flyweights, manifold pressure compensators, and control housings (WP 0085 to WP 0093)
• Group 0309 Fuel Filters: Primary fuel filters, water separators, and filter heads (WP 0094 to WP 0097)
• Group 0311 & 0312 Starting Aids & Throttle Controls: Ether cold-start systems, primer pumps, accelerator linkages, and rods (WP 0098 to WP 0102)
• Group 0401 Exhaust System: Muffler assemblies, exhaust pipes, and mounting clamps (WP 0103 to WP 0104)
• Group 0501 to 0507 Cooling System: Radiators, surge tanks, fan shrouds, thermostats, water manifolds, water pumps, fan clutches, belts, and aftercoolers (WP 0105 to WP 0125)
• Group 0601 to 0613 Electrical & Instrumentation: 24V alternators, starters, safety shutdown valves, instrument clusters, blackout and composite lighting, sending units, battery boxes, slave receptacles, and wiring harnesses (WP 0126 to WP 0176)
• Group 0700 to 0721 Transmission & Drivetrain: Automatic transmission assemblies, shift controls, torque converters, planetary carriers, clutches, valve bodies, oil pans, and external coolers (WP 0177 to WP 0206)
• Group 0800 to 0804 Transfer Case: Transfer case housings, intermediate shafts, air-actuated shift controls, interlock valves, and lubrication pumps (WP 0207 to WP 0218)
• Group 0900 Propeller Shafts: Front, intermediate, and rear drive shafts for Dana and Rockwell driveline configurations across SWB, LWB, and XLWB chassis (WP 0219 to WP 0230)
• Group 1000 to 1102 Axles & Differentials: Front steering drive axles, forward rear and rear rear tandem axles, differential carriers, pinions, through-shafts, and steering knuckles (WP 0231 to WP 0243)
• Group 1201 to 1211 Brake Systems: Parking brake drums, service brake shoes, spiders, treadle valves, air brake chambers, fail-safe spring brakes, ABS relay valves, electronic control units (ECU), air compressors, reservoirs, and air dryers (WP 0244 to WP 0312)
• Group 1311 & 1313 Wheels & Tires: Wheel hubs, brake drums, CTIS wheel valves (70 PSI and 90 PSI), rims, and tire equipment (WP 0313 to WP 0323)
• Group 1401 to 1412 Steering: Steering columns, mechanical steering gears, hydraulic power steering gears (including Sheppard units), power steering pumps, hydraulic lines, and assist cylinders (WP 0324 to WP 0340)
• Group 1501 to 1506 Frame & Towing: Frame side rails, crossmembers, bumpers, lifting shackles, pintle hooks, spare tire davits, and fifth wheel assemblies (WP 0341 to WP 0369)
• Group 1601 to 1605 Suspension: Front and rear leaf spring packs, spring seats, shock absorbers, torque rods, and radius rods (WP 0370 to WP 0374)
• Group 1801 to 1812 Body, Cab, & Special Purpose Bodies: Cabs, doors, windshield frames, troop seats, cargo gates, hydraulic dump hoists, expansible van folding walls and counterbalances, and wrecker crane superstructures (WP 0375 to WP 0476)
• Group 2001 to 2004 Winches, Cranes, & Power Take-Offs: Hydraulic front winches, rear wrecker winches, cable tensioners, wrecker crane booms, swing turntables, and transmission/transfer case PTOs (WP 0477 to WP 0543)
• Group 2201 to 3307 Accessories, Winterization, & Special Purpose Kits: Soft tops, tarpaulins, personnel heaters, coolant preheaters, deep water fording kits, weapon mounts, convoy warning lights, and A-frame kits (WP 0544 to WP 0654)
• Special Tools & Cross-Reference Indexes: Specialized maintenance tools, repair kits, bulk supplies, and comprehensive NSN and Part Number alphanumeric indexes (WP 0655 to WP 0675)

Together, these work packages provide technicians with a systematic visual and alphanumeric index of every part installed on the M939 truck chassis. Instead of guessing component relationships or wrestling with ambiguous part descriptions, maintenance crews can verify physical configurations directly against detailed line drawings before requisitioning parts.

SMR Codes: Complete Maintenance Authorization Decoding

Every line item in the M939 M939A1 M939A2 Series 5-Ton 6×6 Military Truck Repair Parts and Special Tools List TM 9-2320-272-24P-1 features a standardized 5-position Source, Maintenance, and Recoverability (SMR) code that dictates military logistics and supply procedures:

• Source Code (Positions 1 & 2): Identifies how an item enters the supply inventory. Stock items available through regular supply channels carry codes such as PA, PB, PC, PD, PE, PF, PG, PH, PR, or PZ. Components delivered as part of an overhaul kit are coded KD, KF, or KB. Items locally manufactured from bulk stock are coded MF, MH, ML, or MD, while multi-component assemblies fabricated in the field or depot carry AF, AH, AL, or AD codes. Critical sub-assemblies ordered only as higher assemblies carry the XA designation.
• Maintenance Authorization Code (Position 3): Establishes the lowest maintenance echelon authorized to remove, replace, and install the part. A code of F indicates field maintenance capability, H designates below depot sustainment maintenance, L specifies specialized repair activities, and D restricts replacement to depot facilities.
• Repair Level Code (Position 4): Identifies the lowest echelon authorized to perform complete teardown, repair, and overhaul of the unserviceable item. Non-reparable items are coded Z, while components restored at field, sustainment, specialized repair, or depot levels are coded F, H, L, or D respectively.
• Recoverability Code (Position 5): Defines ultimate disposition when an item fails. Condemnable non-reparables carry Z, whereas reparable assemblies evaluated for field or depot condemnation carry F, H, or D. Items requiring hazardous material, precious metal, or critical handling carry code A.

Engine and Fuel Injection Systems Breakdown

The manual highlights critical design evolutions between the original M939/M939A1 trucks and the improved M939A2 models. For the early diesel engines, extensive parts coverage is provided for the cylinder block, cylinder sleeve assemblies (P/N 3042763 used after serial number 11246663), crankshaft bearing sets in standard, 0.010, 0.020, 0.030, and 0.040 undersizes, and the Air-Fuel Control (AFC) and Variable Speed (VS) fuel pump assemblies. For the M939A2 series, the catalog details the turbocharged diesel configuration, including the six-cylinder block (P/N 3968733), individual cylinder head assemblies, replacement cylinder liner kits with seals (P/N 3800328), Holset turbocharger components, and the inline fuel injection pump (P/N 0 403 436 109). Technicians can trace complete governor assemblies, fuel delivery lines, primer pumps, atomizer nozzles, and cold-weather ether injection systems down to every fitting and O-ring.

Transmission, Axles, Transfer Case, and Braking Systems

Powertrain support in this RPSTL includes complete internal breakdowns of the automatic transmission assemblies, modulated lockup valves, servo bodies, oil pumps, and remote oil cooler packages. Drivetrain listings provide complete parts indexing for both Dana and Rockwell transfer cases, intermediate drive shafts, and front-to-rear propeller shafts across short, standard, and extra-long wheelbases. Drive axle coverage spans front driving steering axles, rear forward tandem axles, and rear rear tandem axles, detailing carrier caps, ring and pinion sets, differential through-shafts, and wheel end spindle assemblies. Full service brake and air system breakdowns cover fail-safe spring brake chambers, treadle valves, alcohol evaporators, air reservoirs, Central Tire Inflation System (CTIS) wheel valves rated for 70 PSI and 90 PSI, and late-model Anti-Lock Brake System (ABS) electronic control units, wheel speed sensors, and exciter rings.

The Essential Field Maintenance Parts Guide

Working on military trucks without an authentic RPSTL often results in wasted labor, incorrect part orders, and compromised vehicle safety. The M939 M939A1 M939A2 Series 5-Ton 6×6 Military Truck Repair Parts and Special Tools List TM 9-2320-272-24P-1 removes all ambiguity by providing verified military engineering numbers, cross-referencing NSNs directly with commercial manufacturer part numbers. When rebuilding complex subassemblies like a wrecker hydraulic winch, an expansible van counterbalance mechanism, or a heavy-duty power steering gear, having the exact exploded view ensures parts are reassembled in their correct orientation with all required shims, seals, and retaining rings properly installed. Delivered as an instant, high-clarity PDF file, this manual can be referenced on your workshop computer, loaded onto a rugged tablet in the field, or printed out for specific repair jobs, making it an indispensable resource for any serious military truck maintainer.