TM 5-4310-350-14
Section V. TROUBLESHOOTING
listed or is not corrected by listed corrective
4-8 Scope
actions, you should notify higher level mainte-
a. This section contains troubleshooting or mal-
nance
function information and tests for locating and
c. Table 42. List the common malfunctions
c o r r e c t i n g most of the troubles which may
that you may find during the operation or mainte-
develop in the air compressor. Each malfunction
nance of the air compressor or its components.
or trouble symptom for an individual component,
You should perform the test, inspections and
unit, or system is followed by a list of tests or
corrective actions in the order listed.
inspections necessary for you to determine proba-
ble causes and suggested corrective actions for
NOTE
you to remedy the malfunction.
If you have a malfunction which is not listed
b. This manual cannot list all possible malfunc-
in this table, notify the next higher level of
tions that may occur or all tests or inspections,
maintenance.
and corrective actions. If a malfunction is not
Table 4-2. Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
NOTE
Before you use this table be sure you have performed all operating checks.
1. COMPRESSOR PUMPING OIL
Step 1. Check for a leaking release valve.
Refer to paragraph 4-14 and replace a leaking release valve.
Step 2. Check for a hot cylinder head. If one seems hotter than the other, there could be damage to the
rings.
Notify direct support maintenance.
2. KNOCKS OR R.ATTLES
Step 1. Check for loose belt wheel or pulley.
Refer to figure 4-4 and replace the electric motor if the pulley is bad.
Step .2. Check for leaking release vaIve.
Refer to paragraph 4-14 and replace a leaking release valve.
3. AIR DELIVERY DROPPING
Step 1. Check for air leaks in piping.
a. Make a solution of soapy water.
b. Apply to the fittings, if a leak is present it will be indicated by the soapy water bubbling.
Refer to paragraph 4-16 and replace fittings if tightening does not stop the bubbles.
Step 2. Check for a leaking release valve.
Refer to paragraph 4-14 and replace a leaking release valve.
Step 3. Check for restricted air passages, leaking or broken valves.
Notify Direct Support Maintenance.
4. MOTOR OVERLOAD RELAY TRIPS
Step 1. Check line voltage or motor terminals for loose connections,
Tighten loose connections.
Step 2, Check for defective starter heaters.
If a defective starter heater is found, notify Direct Support Maintenance.
