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TM 55-2915-335-30&P
Table 2-2. Maintenance Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
3. MOTOR RUNS, NO FUEL FLOW OR PRESSURE
Step 1. Check for motor running backwards.
Connect pump to 28 vdc power supply. Start
pump and check that startup torque of motor
is counterclockwise, as shown. If startup torque
is clockwise, field tube is reversed on cartridge.
If motor rotation is correct, go to Step 2.
Remove field tube and install
correctly per instructions and il-
lustrations in paragraph 2-18.
without a
Running motor over one minute
flow of liquid may cause permanent
damage to the motor.
Step 2. Check for loose impeller on armature
shaft. Remove field tube, armature, and impel-
ler (paragraphs 2-18 and 2-19). Check impeller
for worn or defective drive boss. If key-drive
version, check for missing or broken drive key.
If impeller is good, proceed to Step 3.
If impeller is defective, replace
impeller per instructions and il-
lustrations in paragraph 2-18.
2-11
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