TM 5-4310-370-14
TABLE 5-1. DIRECT AND GENERAL SUPPORT TROUBLESHOOTING (Cont'd)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
4. MOTOR DOES NOT START AT LOW OPERATING POINT OR DOES NOT STOP AT HIGH OPERATING
POINT
WARNING
Disconnect compressor unit from main power supply before performing check(s)
or inspection, to avoid personal injury.
Step 1.
Check pressure switch to see if any leads are loose or discon-
nected at terminals.
If pressure switch leads are loose or are not connected,
reconnect leads and/or tighten leads.
Step 2.
Check to see if pressure switch can still be adjusted.
If pressure switch adjustment mechanism can not be
adjusted any further, replace pressure switch.
Step 3.
Check to see if pressure switch still fails after above inspec-
tion and/or corrective actions.
If after above inspections and/or corrective actions, the
pressure switch still malfunctions, replace it.
5. INTAKE OR EXHAUST VALVE TAP OR STICKING
Step 1.
Listen for valve(s) tapping.
WARNING
Disconnect compressor unit from main power supply before performing check(s)
or inspection, to avoid personal injury.
WARNING
Release pressure from air receiver and compressor pump before inspection,
performing procedures, or disassembly of equipment to avoid personal injury.
If valve(s) is tapping, remove and replace valve(s).
Step 2.
Check to see if valve(s) is sticking.
If valve(s) is sticking, remove and replace valve(s).
5-3
