TM 5-4310-384-13
Table 3-3. Troubleshooting (Continued)
Malfunction
Test or Inspection
Corrective Action
4.
IF OVERLOAD KICKS OUT REPEATEDLY.
Step 1.
Check for short circuits between windings T1 and T2 and motor frame. Refer to paragraph 3-33.
If windings are shorted, notify Intermediate Direct Support.
Step 2. Check for restriction of air flow between cylinder heads (intercooler), or from compressor to tank
(aftercooler).
Replace damaged compressor tubing. Refer to paragraphs 3-31 and 3-43.
Step 3.
Check for overloading of compressor.
Reduce air pressure to within tolerance.
COMPRESSOR UNIT
5.
COMPRESSOR DOES NOT PUT OUT ENOUGH AIR.
Step 1.
Check for dirty or clogged intake filters.
Clean or replace as necessary.
Step 2.
Check if V-belts are loose.
Tighten belts. Refer to paragraph 3-24.
6.
BELTS WEAR TOO FAST.
Step 1.
Check if V-belts are loose.
Tighten belts. Refer to paragraph 3-24.
Step 2.
Check if drive pulley and flywheel are out of alignment.
Align pulley and flywheel. Refer to paragraph 3-25.
7.
COMPRESSOR OIL LOSS.
Step 1.
If unit is new, oil consumption may be high until valve assemblies seat.
Wait for valves to seat, then recheck oil consumption.
Notify Intermediate Direct Support if oil consumption continues to be high.
8.
SLOW PUMPING OR INSUFFICIENT PRESSURE.
Step 1.
Check for leaks in air lines and fittings.
Tighten fittings or replace leaking parts. Refer to paragraph 3-34.
Step 2.
Check for air leaking continuously out of regulator vent hole caused by ruptured diaphragm.
Replace diaphragm. See paragraph 3-44.
Step 3.
Check for exceeding compressor capacity.
Reduce air usage.
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