TM 5-4310-352-14
Table 3-2. Operator/Crew Preventive Maintenance Checks and Service Continued
D-Daily
W-Weekly
Time required: 0.2
Time required: 0.4
Interval and
Sequence No
Item to be inspected
Work time
D
W
procedure
(M/H)
0.1
2
SWITCHES AND CONTROLS
Check for loose wires on switches, motor starter, or motor. Notify organizational maintenance of
defect.
3
DRIVE BELTS
Check for wear and proper tension of drive belts. Adjust belts by moving motor away from com-
0.1
pressor and tighten mounting nuts.
4
SAFETY RELIEF VALVES
Check for proper operation, by lifting lever
0.1
Section III. TROUBLESHOOTING
b. This manual cannot list all malfunctions that
3-5. General
may occur, nor all tests or inspections and corrective ac-
a. This section contains troubleshooting informa-
tions. If a malfunction is not listed or is not corrected by
tion for locating and correcting most of the trouble that
listed corrective action, you should notify higher level
may develop in the air compressor. Each malfunction for
maintenance.
an individual component is followed by a list of test or
inspections which will help you to determine probable
causes and corrective actions to take. You should perform
3-6. Troubleshooting
the test inspections and corrective actions in the order
Refer to Table 3-3 below for malfunctions, test or inspec-
listed.
tion, and corrective actions.
Table 3-3. Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
NOTE
Before you use this Table, be sure you have performed all applicable operating checks. If you have a malfunction which is not listed
in this table, notify the next higher level of maintenance.
1. COMPRESSOR PUMPING OIL
Step 1.
Check for a clogged inlet filter.
(1) Clean body of filter, inspect pads for excessive wear or loss of capacity to retain dust and dirt.
(2) Replace defective pads.
Step 2.
Check oil level (LO 5-4310352-12).
Add oil if necessary.
Step 3.
Check for leaking or maladjusted pilot valve.
Adjust pilot valve (para 3-12).
2. KNOCKS OR RATTLES
Step 1.
Check for loose belt pulley, or motor with excessive end play in shaft.
Notify organizational maintenance.
Step 2.
Check for leaking valves, or restricted air passage.
Notify direct support maintenance .
3. AIR DELIVERY DROPPING
Step 1.
Check for clogged inlet filter.
Service the inlet filter (para 3-13).
Step 2.
Check for air leaks in piping.
Make a solution of soapy water and apply at fittings. If leak is found, notify organizational ,Maintenance.
Step 3.
Check for leaking or maladjusted pilot valve.
Adjust the pilot valve (para 3-12). If leaking, notify organizational maintenance.
4. MOTOR OVERLOAD RELAY TRIPS
Step 1.
Check lubricating oil used.
Use proper oil as specified in lubrication order.
Step 2.
Check V-belts for too tight adjustment.
Adjust V-belts (para 3-8).
Step 3. Check for leaking or maladjusted pilot valve.
Adjust the pilot valve (para 3-12). If leaking notify organizational maintenance.
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