TM-9-2320-361-20

2-1/2-TON, 6x6, M44A2 SERIES TRUCKS (MULTIFUEL)

TECHNICAL MANUAL; UNIT MAINTENANCE

OCTOBER 1991
TM-9-2320-361-20

  TM-9-2320-361-20 - Page 115 of 1207

TM 9-2320-361-20
Table 2-2. Mechanical Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
5. ENGINE STOPS WHEN ACCELERATOR IS RETURNED TO IDLE POSITION
Step 1. Check air induction system for restrictions.
If air induction system is restricted, clean or replace defective components (Chapter 3,
section IV).
Step 2. Check governor idle speed (para. 8-29).
If governor idle speed is set below specifications, adjust (para. 8-29).
Step 3. Perform malfunction 27.
END OF TESTING!
6. ENGINE MISFIRES DURING OPERATION
Step 1. Check air cleaner for restrictions (malfunction 2, step 2).
Step 2. Check for air or water in fuel system (malfunction 2, steps 3 and 4).
END OF TESTING!
7. POOR ACCELERATION AND/OR LACK OF POWER
Step 1.
Step 2.
Step 3.
Step 4.
Step 5.
Step 6.
Step 7.
Step 8.
Step 9.
Check air cleaner for restrictions (malfunction 2, step 2).
Check air induction system for restrictions. If air induction system is restricted, clean or
replace defective components (Chapter 3, section IV).
Check fuel system for contamination and restrictions (malfunction 2, steps 3 and 4).
Check exhaust system for restrictions.
Replace restricted or damaged parts (para. 3-37).
Inspect accelerator pedal and throttle lever for full travel.
Adjust throttle lever travel (para. 3-33).
Check vehicle for dragging brakes, low tire inflation, or cargo overload limit (TM 9-2320-
361-10).
a. If defects are evident during check, adjust or replace components (para. 8-8 or
TM 9-2320-361-10).
b. Correct overload condition (TM 9-2320-361-10).
Check throttle linkage for binding and sticking.
If linkage is binding or sticking, replace throttle linkage (para. 3-33).
Check maximum engine governed speed set within specifications (para. 8-29). If maximum
engine governed speed setting is incorrect, adjust (para. 8-29). Perform malfunction 27.
Check turbocharger hoses and intake manifold elbow for leaks.
a. Tighten base screws and clamps. Replace any missing screws or clamps (para. 3-13).
b. If no improvement during test run, turbocharger malfunction is indicated; notify your
supervisor.
END OF TESTING!
2-30


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