TM 5-4310-373-14
Table 4-2. Troubleshooting continued
Malfunction
Test or Inspection
Corrective Action
COMPRESSOR continued
9. SLOW PUMPING OR INSUFFICIENT PRESSURE.
Step 1. Check for leaks in air lines and fittings.
Tighten fittings or replace leaking parts.
Step 2. Check for overloading of the compressor.
Reduce air use to less than 15 cfm.
Step 3. Check for wrong adjustment of pressure switch.
Adjust pressure switch to cut in at 160 psi and to cut out at 180 psi (para 4-22).
Step 4. Check for bad valves (para 4-35).
Replace bad valves.
10. COMPRESSOR OVERHEATS.
Step 1. Check if pump is low on oil.
Add oil to bring level up to full mark on oil gage.
Step 2. Check for dirt in intercooler or cylinder fins.
Remove dirt.
Step 3. Compressor is getting poor ventilation.
Clear obstructions from around the compressor.
Step 4. Check for leaky manifold gaskets.
Replace gaskets (para 4-35 and 4-36) if defective.
Step 5. Check for worn valves.
Replace valves (para 4-35 and 4-36) if defective.
Step 6. Check if pump is running backwards (clockwise as you face the flywheel).
Rewire motor so it runs counterclockwise (para 4-43).
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