Quantcast LOW OIL PRESSURE AND HIGH WATER TEMPERATURE ALARM WILL NOT SOUND WITH PRESS-TO-TEST SWITCH DEPRESSED cont'd -680640346

 

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LOW OIL PRESSURE AND HIGH WATER TEMPERATURE ALARM WILL NOT SOUND WITH PRESS-TO-TEST SWITCH DEPRESSED cont'd -680640345
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TM-5-2420-224-20-1 Tractor Wheeled 4x4 DED Small Emplacement Excavator (SEE) and High Mobility Material Handler (HMMH) Manual
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LOW OIL PRESSURE AND HIGH WATER TEMPERATURE ALARM WILL NOT SOUND WITH PRESS-TO-TEST SWITCH DEPRESSED cont'd -680640347
TM 5-2420-224-20-1
Table 3-5. Troubleshooting (Cont)
Malfunction
Test or Inspection
Corrective Action
ELECTRICAL SYSTEM (CONT)
Step 7. With warning delay relay connector (5) disconnected, check for +24 VDC
between wire 302 (8) and ground at warning delay relay connector.
If +24 VDC is not present, repair wiring 302 between warning
delay relay connector and fuse box 1.
If +24 VDC is present, reconnect warning delay relay connector
and go to step 8.
Step 8. Check for +24 VDC between wire 303 (9) and ground at warning delay relay
connector (5).
If +24 VDC is not present, replace warning delay relay
(page 4-141).
If +24 VDC is present, go to step 9.
Step 9. Disconnect connector A (10) and check for +24 VDC between wire 303 (9)
and ground.
If +24 VDC is not present, repair wiring 303 between
connector A and warning delay relay.
If +24 VDC is present, reconnect connector A and go to step 10.
Step 10. Disconnect connector X (11) and check for +24 VDC between wire 303 (9)
and ground.
If +24 VDC is not present, repair wiring 303 between
connector X and connector A.
If +24 VDC is present, reconnect connector X and go to step 11.
Step 11. Check for +24 VDC between wire 303 (9) and ground at low oil pressure
and high water temperature alarm (12).
If +24 VDC is not present, repair wiring 303 between low oil
pressure and high water temperature alarm and connector X.
If +24 VDC is present, replace low oil pressure and high water
temperature alarm (page 4-170).
Step 12. Connect jumper between wire 304 (13) and ground at oil pressure sender (14).
Step 13. Disconnect warning delay relay connector (5) and check for continuity
between wire 304 (13) and ground.
If there is continuity, reconnect warning delay relay connector,
remove jumper, and replace oil pressure sender (page 4-202)
or water temperature sending unit (page 4-203).
If there is no continuity, reconnect warning delay relay
connector and go to step 14.

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