TM 5-4310-369-14
Table 4-2. Troubleshooting-Continued
Malfunction
Test or Inspection
Corrective Action
Step 4. Check to determine if engine is at correct speed.
Operation of this equipment presents a noise hazard to personnel in the area. The noise level exceeds the
allowable limits for unprotected personnel. Wear ear muffs or earplugs which were fitted by a trained
professional.
Adjust the engine speed governor control to obtain correct speed. Refer to engine maintenance manual
TM 5-2805-256-14 for procedure.
2.
EXCESSIVE OIL CONSUMPTION.
Step 1. Check for "wrong type" or "inferior grade" of oil.
Step 2. Check compressor for oil leaks and oil weeping at bolts, nuts and gasket areas. Secure bolts and nuts to
correct torque. Gaskets that leak should be replaced if leaking continues after fastenings are tightened.
Step 3. Check crankcase breather for correct operation. Figure 3-5. Vent hole must be free and clear.
3.
NOISY OPERATION.
Step 1. Check for loose external parts.
Examine compressor carefully, tightening any loose bolts, screws, nuts, or other threaded parts that might
be generating noise.
Step 2. Check for pulley striking intercooler coil.
a. Bend the coils toward base so they clear pulley.
b. If pulley still strikes coil, proceed as follows.
(1) Refer to figure 4-3 for removal of belt guard.
(2) Loosen setscrew on hub of flywheel and slide flywheel outward on compressor crankshaft until it
clears coils. Tighten setscrew.
(3) Refer to paragraph 4, step 2, table 4-2, for belt alignment.
(4) Install guard.
Step 3. Check for insufficient oil.
Check oil at oil level sight gage.
