Table 5-1. Air Compressor Troubleshooting Chart

TM 5-6640-214-14

Table 5-1. Air Compressor Troubleshooting Chart

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

1. COMPRESSOR PUMPING OIL

Step 1. Check for clogged intake filter.

Change filter element.

2. KNOCKS OR RATTLES

Step 1. Check for loose, damaged belts or pulleys.

Tighten or replace belt or pulley.

Step 2. Check for leaking valves or restricted air passages.

Fix leaks, or clean blocked air passages.

3. AIR DELIVERY DROPPING

Step 1. Check for clogged intake filter.

Change filter element.

4. EXCESSIVE STARTING AND STOPPING OF AIR COMPRESSOR

Step 1. Check for water in receiver tube.

Remove power from air compressor, and drain the air

receiver tank, when the air has escaped leave draincock

open for a few minutes to allow condensation to escape.

Close draincock, apply power and recheck operation.

Step 2. Check if air leaks in the piping.

Make a solution of soapy water and apply to fittings. If a

leak is present it will be indicated by the soapy water

bubbling. If leak is found, try tightening fitting. If leak

is not corrected, refer to higher maintenance.

5-2