TM 5-4310-384-13
Table 3-3. Troubleshooting (Continued)
Malfunction
Test or Inspection
Corrective Action
Step 4.
Check for wrong adjustment of pressure switch.
Adjust pressure switch to cut in at 160 psi and to cut out at 190 psi. Refer to paragraph 3-21.
Step 5.
Check for broken valve assemblies.
Replace damaged valve. Refer to paragraph 3-32.
9.
COMPRESSOR OVERHEATS.
Step 1.
Check if pump is low on oil.
Add oil to bring level up to full mark on sight glass. Refer to paragraph 3-2.
Step 2.
Check for dirt in intercooler, aftercooler or cylinder fins.
Remove dirt.
Step 3.
Compressor is getting poor ventilation.
Clear obstructions from around the compressor. Ensure proper air flow through belt guard.
Step 4.
Check for leaky cylinder gaskets.
Replace gaskets if defective. Refer to paragraph 3-32.
Step 5.
Check for broken valve.
Replace valve if damaged. Refer to paragraph 3-32.
10.
NOISY COMPRESSOR OPERATION.
Step 1.
Check for loose mounting bolts, drive pulley or flywheel.
Tighten loose components. Refer to paragraph 3-27, 3-25 or 3-30.
Step 2.
Check for foreign matter such as carbon, metal chips, etc. in cylinder.
Remove cylinder head and valve plates and clean cylinder. Refer to paragraph 3-32.
Step 3.
Listen for loose or damaged internal compressor parts (connecting rods, crankshaft, etc.).
Refer to Intermediate Direct Support for inspection and repair if internal compressor damage is suspected.
3-14
