TM 5-4310-376-14
Table 5-1. Direct Support Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 2. Remove flywheel (para 4-31), inspect for seal leakage, on both flywheel and
power take off (PTO) sides. Check for worn bearing and/or shaft on flywheel
side.
Replace defective part(s).
2. ENGINE STOPS SUDDENLY
Drain oil from crankcase and examine for presence of metal particles. If found, inspect
for possible damage to cylinder bore, piston and connecting rod.
Replace defective part(s).
3. ENGINE LACKS POWER, MISSES OR RUNS ERRATICALLY
Step 1. Remove crankcase breather (para 5-10) and cylinder head (para 4-33).
a. Inspect for burned, warped, or broken valves, check seating.
Grind or replace valves (para 5-11).
b. Inspect cylinder bore for signs of wear. Remove piston and connecting rod,
Replace defective part(s).
Step 2. Remove crankcase cover, inspect governor gear and lever for wear.
Replace defective part(s) (para 4-32).
4. ENGINE NOISY
Inspect for worn piston, piston rings, or connecting rod.
Replace defective part(s) (para 5-12).
5. COMPRESSOR NOISY, KNOCKS, OR RATTLES
Step 1. Inspect for loose, misaligned, or warped flywheel.
Align and tighten, replace flywheel (para 5-3).
Step 2. Remove access cover (para 5-6) and noisy cylinder (para 5-5), make following
checks:
5-4
