TM 10-4610-239-24
TM 08580B-24/3
Table 3-1. Direct Support Troubleshooting - Continued
Malfunction
Test or Inspection
Corrective Action
CHEMICAL FEED METERING PUMP ASSEMBLY - Continued
PUMP ELECTRIC MOTOR FAILS TO START WHEN CHEMICAL FEED PUMP SWITCH IS
SET TO START - Continued
If check indicates no continuity through S7, replace S7. Refer to paragraph 3-34.
If any check through a wiring harness does not indicate continuity, repair wiring
harness. Refer to paragraph 3-39.
If any check through a cable does not indicate continuity, repair cable
assembly. Refer to paragraph 3-17.
Step 4.
Shut down ROWPU. Refer to TM 10-4610-239-10. Shut down power. Refer to generator
manual. Set CHEMICAL FEED PUMP switch to RUN position. Refer to chemical feed
metering pump assembly support diagram figure 3-8. Check continuity point-to-point between
test points A and B through S7-2 and S7-1.
If all checks indicate continuity except across terminals 2 and 3 of K7, repair
K7. Refer to paragraph 3-49.
If there is no continuity through other sections of K7, repair K7. Refer to
If there is no continuity through S7, replace S7. Refer to paragraph 3-34.
If there is no continuity through a wiring harness, repair wiring harness.Refer
If there is no continuity through a cable, repair cable assembly. Refer to
Step 5.
Refer to schematic diagram figure FO-3. Check for 115 V ac between K7 terminal T and
ground terminal El.
If 115 V ac is not present, go to step 6.
If 115 V ac is present, go to step 9.
Step 6.
Refer to schematic diagram figure FO-3. Check for 115 V ac at K7 between terminal on the
top screw of the heater and TB2-3.
If 115 V ac is not present, go to s ep 10.
t
If 115 V ac is present, shut down ROWPU. Refer to TM 5-4610-215-10. Shut
down power. Refer to generator manual. Remove two screws and heater.
Replace heater. Start ROWPU. Refer to TM 10-4610-239-10. Repeat step 5.
3-37
