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TM 55-2915-335-30&P
Table 2-2. Maintenance Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. MOTOR FAILS TO START, LOW OR
NO CURRENT DRAW
Step 1. Check brush circuit: Remove pump
cartridge from housing (paragraph 2-10). Iso-
late brush circuit by removing cover-end
brushes from brush holder (paragraph 2-17).
Use a multimeter to check for continuity be-
tween positive terminal, point A, and secon-
dary positive brush, point C. If you have con-
tinuity, circuit is good; proceed to Step 2.
NOTE
Secondary positive brush lead is
secured to motor stud on opposite
side from positive terminal, point A.
If circuit is open, a solder joint
between leads is probably open.
Inspect and repair per instruc-
tions and illustrations in
paragraph 2-23.
Step 2. Check circuit to secondary negative
brush lead. Use multimeter to check for con-
tinuity between negative secondary brush,
point B, and any point on the impeller housing.
If you have continuity, circuit is good; proceed
to Step 3.
If circuit is open, secondary
lead to ground is broken. In-
spect and repair per instruc-
tions and illustrations in
paragraph 2-23.
2-7
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