Table 2-3. Mechanical Troubleshooting
TM 9-2320-289-20
(con’t)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
27. OVERHEATS
Step 1.
Check for loose, damaged, or missing fan belts.
Adjust or replace if damaged. (See paragraph 4-2 or 4-3)
Step 2.
Pressurize cooling system and check for leakage on all hoses and components.
(See TM 750-254)
Tighten loose clamps, fasteners, or fittings. Replace leaking hoses and
components. (See paragraphs 3-6, 3-32, 3-33, and 3-34)
Step 3.
If engine continues to overheat, replace thermostat. (See paragraph 3-34)
Step 4.
Check fan clutch.
Replace fan clutch. (See paragraph 3-35)
28. NOTICEABLE LOSS OF POWER
Step 1.
Inspect air cleaner filter and polywrap.
Replace air cleaner filter if required. Clean polywrap if required. (See
paragraph 3-9).
WARNING
Diesel fuel is flammable. When disconnecting fuel lines to test fuel flow,
direct fuel spray away from source of ignition. A fire extinguisher must be
on hand in work area. Failure to follow this warning may result in serious
injury or death to personnel.
Step 2.
Check for restricted fuel filter. Bleed air from fuel system. (See paragraph 3-17)
If fuel flow is insufficient, replace fuel filter. (See paragraph 3-17)
Step 3.
Check for leaking or restricted fuel lines.
Tighten fittings or replace leaking or restricted lines. (See paragraph 3-13 or
3-14)
WARNING
Before checking for improper positioning and damage, allow exhaust
system to cool. Failure to follow this warning will result in serious burns.
Step 4.
Check tailpipe, muffler, and exhaust pipe for improper positioning and damage.
Reposition and tighten mounting hardware.
Replace any damaged components. (See paragraph 3-27)
Change 2
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