TM 9-2320-289-34
Table 2-1. Mechanical Troubleshooting (Con’t)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 4.
Remove engine oil pan, (See TM 9-2320-289-20) Inspect connecting rods to see if
any are bent.
Replace any bent connecting rods. (See paragraph 3-1 3)
Step 5.
Remove pistons (see paragraph 3-1 3) and check piston-to-cylinder bore clearance.
(See paragraph 3-13, CLEANING AND INSPECTION, steps 9 and 10)
30. STALLS UNDER DECELERATION OR HEAVY BRAKING
Step 1.
Check idle speed, (See TM 9-2320-289-20)
Step 2.
Remove governor Cover-. (See paragraph 3-38) Check for black particles,
If black particles are evident, replace governor weight retaining ring. (See
paragraph 3-42)
Step 3.
Remove governor cover. (See paragraph 3-38) Operate throttle shaft and observe
governor assembly and metering valve for binding.
If there is binding, remove governor assembly and metering valve. (See
paragraph 3-39) Replace any damaged components. Clean metering valve
with calibration fluid. (Item 13, Appendix B) Reinstall governor assembly and
metering valve. If binding continues, replace metering valve.
31. EXCESSIVE SURGE AT LIGHT THROTTLE
Step 1.
Check fuel injector pump timing. (See paragraph 3-44)
Step 2.
Check for restrictions in fuel lines.
Clear or replace
restricted fuel lines, (See paragraph 3-5 or
TM 9-2320-289-20) If no restrictions are obvious, replace fuel filter. (See
TM 9-2320-289-20)
Step 3.
Test each fuel injector nozzle, (See paragraph 3-36)
32. MISFIRES ABOVE IDLE OR RUNS ROUGH WHILE DRIVING (IDLES NORMALLY)
Step 1.
Check fuel injector pump timing. (See paragraph 3-44)
Step 2.
Check for restrictions in fuel lines.
Clear or replace
restricted fuel lines.
(See paragraph 3-5 or
TM 9-2320-289-20) If no restrictions are obvious, replace fuel filter. (See
TM 9-2320-289-20)
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