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MOTOR OVERHEATS.
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TM-5-6640-213-14 Laboratory Air Mobile Aviation Fuel NSN
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PUMP VIBRATES OR OPERATES NOISILY
TM 5-6640-213-14
Table 3-3. Water System Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Check if current overload causes circuit breaker switch No. 3 to
Step 2.
open.
Locate and correct cause for overload. Close circuit breaker
and restart motor.
Check if mechanical or electrical overload causes safety overload
Step 3.
device or motor to automatically turn current off.
Locate and correct cause for overload. Allow unit to CoOl before
restarting.
7. PUMP FAILS TO DELIVER AIR AT PROPER PRESSURE.
Step 1.
Motor speed too low.
Check electrical system and correct applicable defect.
Step 2.
Check if excessive oiling or heavy oil causes a vane or vanes to
stick in rotor.
Flush the pump.
Step 3.
Check for leaks in system.
Check entire system (piping, hose, fittings, valves, seals and
other components) and correct defect.
Step 4.
Check if inlet or outlet ports clogged.
Inspect inlet and outlet ports. Make necessary corrections.
Step 5.
Check if negative side of system not vented to atmosphere causes
low pressure on positive side of system not vented to atmosphere
causes inefficient negative pressure.
Ensure proper venting of negative side of system when positive
side is being used. Ensure proper venting of positive side of
system when negative side is being used.
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