TM 5-4310-349-14
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.
1.
COMPRESSOR PUMPING OIL.
Step 1. Check for a clogged intake filter.
Service the intake filter (para 3-9).
Step 2. Check for low oil level.
Fill with proper oil. (LO 54310349-12).
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 organizational maintenance.
3.
AIR DELIVERY DROPPING.
Step 1. Check for clogged inlet filter.
Service the intake filter (para 3-9).
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.
4.
MOTOR OVERLOAD RELAY TRIPS.
Step 1. Check compressor for proper weight oil.
Service with proper oil (para 3-2).
Step 2. Check V-belts for too light adjustment.
Adjust V-belts (para 3-7).
5.
EXCESSIVE STARTING AND STOPPING.
Step 1. Check the receiver drain.
Drain the receiver (para 3-10).
Step 2. Check for air leaks in piping.
Repeat Step 2 of Paragraph 3 above
Step 3. Pressure switch not set properly.
Notify organizational maintenance.
6.
COMPRESSOR RUNNING HOT.
Step 1. Check for blockage of air to fan wheel.
Move any foreign object that is blocking air passage. Use compressed air to remove any accumulation of dust or dirt.
Step 2. Check for low oil level.
Fill to proper level (LO 5-4310-349-12).
Step 3. Check for clogged inlet filter.
Service the inlet filter (para 3-9).
7.
COMPRESSOR RUNNING SLOW;
Step 1. Check motor terminal board for loose connection.
Tighten loose terminals. Clean the terminal board with blast of air.
Section IV. MAINTENANCE PROCEDURES
Remove a damaged guard for straightening or
3-5.
Belt Guard Assembly
replacement.
c. Removal. Turn off power at source and lock it
out. Refer to figure 3-1 or 3-1.1 and remove belt guard
belts and pulleys. The mesh screening covers the
in numerical sequence as shown.
flywheel fan used to circulate air for cooling the
compressor unit.
b. Inspection. Inspect for damage to screen,
bends, dents, or other damage to belt guard panels.
Check for accumulation of grease soaked dust, dirt, or
other foreign matter. Remove dirty guard for cleaning.
Change 2 3-3
