Manual Free | Fmtv Technical

The Family of Medium Tactical Vehicles (FMTV) Technical Manual (TM) is a comprehensive set of documents governing the operation and maintenance of vehicles like the M1078 (LMTV) and M1083 (MTV) series. These manuals are typically divided into Operator's Instructions (-10) and Maintenance Instructions (-20/-34). 1. Operator’s Instructions (TM 9-2320-365-10 / 366-10)

This volume provides the essential information for crew members to operate and perform basic field maintenance. TM-9-2320-365-10 - NSN Depot

Useful technical specs (typical ranges)

  • GVWR: ~16,000–26,000 lb depending on variant
  • Engine power: 210–350+ hp (varies by engine model/year)
  • Payload: ~2,500–10,000+ lb depending on configuration
  • Fuel capacity: ~50–90 gallons
  • Max fording depth: ~48 inches (with preparation on some variants)

Conclusion: The TM is Your Co-Pilot

The FMTV Technical Manual is more than a book; it is a two-decade accumulation of trial, error, and survival in combat zones. Whether you are replacing a CTIS valve stem on an M1078 LMTV or overhauling the transfer case on an M1089 wrecker, consult the TM before turning a single wrench.

Action Steps for Readiness:

  1. Download the full TM 9-2320-365 series in PDF today.
  2. Print the Operator’s -10 and keep it in the glove box.
  3. Laminate the Fault Code table from the -20 manual and zip-tie it to the dash.

Respect the manual, and the FMTV will take you anywhere. Ignore it, and you will be walking home.

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This piece focuses on the Light Medium Tactical Vehicle (LMTV) Cargo Truck (M1078), covering a standard Preventative Maintenance Checks and Services (PMCS) procedure and a mechanical adjustment. Fmtv Technical Manual

HEADQUARTERS DEPARTMENT OF THE ARMY WASHINGTON, D.C.

TECHNICAL MANUAL NO. 9-2320-365-10

OPERATOR’S MANUAL FOR TRUCK, CARGO, LIGHT MEDIUM TACTUAL VEHICLE (LMTV) M1078 SERIES

SECTION IV. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)

2-7. INTRODUCTION

Preventive maintenance is the systematic care, inspection, and servicing of equipment to maintain it in serviceable condition and prevent failures. The PMCS tables in this manual list the inspections and services required to maintain the FMTV in top operating condition. Perform PMCS at the intervals specified in Table 2-1. The Family of Medium Tactical Vehicles (FMTV) Technical

WARNING Failure to perform PMCS properly could result in injury or death to personnel, or damage to equipment. Pay strict attention to WARNING and CAUTION statements.

TABLE 2-1. OPERATOR PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)

| ITEM NO. | INTERVAL | LOCATION | PROCEDURE | NOT READY/ AVAILABLE IF: | | :--- | :--- | :--- | :--- | :--- | | 01 | Before | ENGINE COMPARTMENT | Engine Oil Level Check a. Open cab access cover.
b. Clean area around dipstick (1) to prevent debris from entering engine.
c. Remove dipstick and wipe clean.
d. Insert dipstick fully, then remove to check oil level.
e. Oil level must be within the cross-hatched "SAFE" operating range on dipstick.
f. If oil level is low, add oil as specified in Appendix C. | Oil level is below the "SAFE" area on dipstick. | | 02 | Before | UNDER VEHICLE | Transmission Fluid Check a. Ensure vehicle is on level ground.
b. Locate transmission dipstick (on right side of engine).
c. Check fluid level in the same manner as engine oil. Fluid should be in the "COLD" range if engine is cold, or "HOT" range if engine is at operating temperature. | Fluid level is below the "COLD" range mark. | | 03 | During | IN CAB | Instrument Panel Cluster (IPC) a. Monitor IPC for warning lights and gauges.
b. Check that engine coolant temperature gauge reads between 180°F and 210°F during normal operation.
c. Verify that "LOW AIR PRESSURE" warning light is OFF and air pressure gauges read above 60 psi (414 kPa). | Gauges read outside normal operating parameters. Warning lights remain illuminated. |

CHAPTER 3 OPERATION UNDER UNUSUAL CONDITIONS

3-9. TIRE PRESSURE ADJUSTMENT (CENTRAL TIRE INFLATION SYSTEM - CTIS)

The FMTV is equipped with a Central Tire Inflation System (CTIS) that allows the operator to adjust tire pressure to match terrain conditions without leaving the cab. Correct tire pressure is critical for mobility and tire life. GVWR: ~16,000–26,000 lb depending on variant Engine power:

CAUTION Do not use the EMERGENCY setting on hard surface roads. Tire damage and vehicle instability may occur.

PROCEDURE FOR CHANGING TIRE PRESSURE:

  1. Ensure vehicle speed is below the maximum limit for the desired setting. (See Table 3-2).
  2. Locate the CTIS Control Panel on the dashboard to the right of the steering wheel.
  3. Press and release the desired mode button:
    • HIGHWAY: For paved roads and hard surfaces.
    • CROSS-COUNTRY: For unpaved roads, gravel, and moderate terrain.
    • SAND/MUD/SNOW: For soft terrain requiring maximum traction.
    • EMERGENCY: For extreme soft terrain or run-flat capability.

3. Unit Maintenance Level (-20) Features

  • Troubleshooting (Symptom-to-Cause)
    • Flowcharts for: engine no-start, transmission slip, CTIS fault, no air pressure, electrical failure
    • Fault codes (J1939 CAN bus, Allison transmission, CTIS controller)
  • Mechanical Systems Repair
    • Engine (C7): injector replacement, belt tensioning, cooling system flush
    • Transmission (Allison 3500/3700SP): filter change, PTO installation
    • Driveline & axles: differential lock repair, CTIS hub seals
    • Brakes: air canister replacement, slack adjuster, ABS sensor
    • Steering: steering gear box, hydraulic pump
  • Electrical System
    • 24V NATO slave receptacle, alternator (100A/200A)
    • Lighting, blackout light circuits
    • Wiring harness connectors & pinouts
    • Starting system (two 12V batteries series/parallel)
  • CTIS Maintenance
    • Wheel valve, pneumatic control box, ECU diagnostics
    • Roadside inflation/deflation procedures
  • Cab & Chassis
    • Cab tilt mechanism (hydraulic/manual)
    • Spare tire carrier removal/installation
    • Air filter service (desert/muddy conditions)

5. Vehicle Weights and Dimensions (Operator’s TM Appendix A)

Before loading an FMTV onto a lowboy trailer, consult Appendix A. The manual lists the exact curb weight, height with the cab tilted, and center of gravity. Ignoring this leads to DOT fines or rollovers.

4. Brake Air System Walk-Around (LO 9-2320-365-12)

The lubrication order includes a diagram of the M1083’s dual-circuit air brake system. Mechanics use this daily to check for air dryer desiccant contamination and to manually purge the wet tank.

Write-Up: FMTV Technical Manual (TM 9-2320-xxx)

Title: Technical Manual for Family of Medium Tactical Vehicles (FMTV) – M1078, M1083, M1095 Series

Purpose:
To provide field-level, sustainment, and depot maintenance personnel with standardized procedures for the operation, troubleshooting, electrical diagnostics, and repair of all FMTV variants, including cargo trucks, wreckers, dump trucks, and tractor configurations.

Scope:
Covers A0, A1 (LMTV), A1P2, and A2 series platforms with both 2.5-ton and 5-ton ratings, CAT/BAE powerpacks, and the independent suspension system.

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