TM 9-2320-363-34-1
Table 2-1. Troubleshooting (Cont)
Malfunction
Test or Inspection
Corrective Action
3. ENGINE RUNS ERRATICALLY.
Step 1.
Inspect timing wheel
ENGINE (CONT)
for looseness.
Tighten timing wheel (page 12-41).
Step 2. Inspect timing wheel for chipped or missing teeth.
Replace timing wheel (page 12-41).
4. ENGINE OVERHEATS.
Step 1. Check for excessive fan tip movement (wobble). Measure movement with fan
disengaged. Movement must not exceed 3/16 in. (4.76 mm) fore and aft at
blade tip.
If measurement exceeds 3/16 in. (4.76 mm), replace clutch
(TM 9-2320-363-20). If measurement is within tolerance, go to
step 2.
Step 2. Check for lining wear. Install dial indicator as close to clutch as possible
and place indicator probe on clutch. Apply air pressure of at ieast 90 psi
(620.5 kPa). Make sure fan rotates freely. Zero indicator and release
pressure and disconnect tube.
If dial indicator reads 0.17 in. (4.32 mm) or greater, repair
(page 12-206) or replace clutch (TM 9-2320-363-20).
5. ENGINE RETARDER (JAKE BRAKE) NOT OPERATING.
Test retarder solenoid (page 4-50).
Replace retarder solenoid (page 4-50).
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