TM 10-4610-239-24
TM 08580B-24/3
Table 3-1. Direct Support Troubleshooting - Continued
Malfunction
Test or Inspection
Corrective Action
RAW WATER PUMP NO. 2 ASSEMBLY - Continued
PUMP ELECTRIC MOTOR FAILS TO START WHEN RAW WATER PUMPS NO. 2 SWITCH IS
SET TO START - Continued
Step 11.
Shut down ROWPU. Refer to TM 10-4610-239-10. Shut down power. Refer to generator
manual. Refer to interconnect diagram figure FO-4. Check continuity between K4 terminals
L1, L2, and L3 and J1 pins A, B, and C respectively.
If all three measurements do not indicate continuity, go to step 17.
If all three measurements indicate continuity, repair K4. Refer to paragraph 3-49.
Step 12.
Shut down ROWPU. Refer to TM 10-4610-239-10. Shut down power. Refer to generator
manual. Remove raw water pump no. 2 cable assembly from motor. Refer to paragraph 2-134.
Leave cable connected to J4. Refer to schematic diagram figure FO-3. Check continuity
between motor controller K4 terminals T1, T2 and T3 and wire lugs on end of cable.
If all three measurements do not indicate continuity, go to step 13.
If all three measures indicate continuity, go to step 14.
Step 13
Disconnect raw water pump no. 2 cable connector P4 from ROWPU. Refer to schematic
diagram figure FO-3. Check continuity between lugs on end of cable and P4-A, P4-B, P4-C,
and P4-D.
If all four measurements indicate continuity, replace J4. Refer to paragraph 3-37.
If all four measurements do not indicate continuity, repair raw water pump no. 2
cable assembly. Refer to paragraph 3-17.
Step 14.
Refer to schematic diagram figure FO-3. Check continuity between wire lugs o end of
n
cable and junction box ground terminal El.
If there is no continuity between any wire lug and El, go to step 15.
If there is continuity between a wire lug and El, repair raw water pump no. 2 electric
motor. Refer to paragraph 3-57.
3-60
