TM-9-2320-386-24-1-2

2-1/2-TON, 6X6, M44A3 SERIES TRUCKS (DIESEL)

TECHNICAL MANUAL; EXTENDED SERVICE PROGRAM (ESP); UNIT, DIRECT SUPPORT AND GENERAL SUPPORT; MAINTENANCE MANUAL; VOLUME 2 OF 2

MAY 2001
TM-9-2320-386-24-1-2

  TM-9-2320-386-24-1-2 - Page 26 of 636

Direct Support Mechanical Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
48. WINCH LEAKS OIL
Step 1. Check for defective oil seals and gaskets.
Replace oil seals and gaskets if defective (TM 9-2320-361-34).
Step 2. Check for cracked covers and housings.
Replace covers and housings if cracked (TM 9-2320-361-34).
END OF TESTING!
WINTERIZATION KITS
NOTE
Mechanical troubleshooting for personnel and engine coolant
heaters is the same. The following is for fuel burning personnel
heaters.
49. HEATER FAILS TO TURN ON
Bench test for defective control parts (TM 9-2320-361-34).
If defective, replace control parts as necessary (TM 9-2320-361-34).
END OF TESTING!
50. HEATER OVERHEATS – OVERHEAT SWITCH IS GOOD
Step 1. Check for obstructed air flow.
If air flow is obstructed, clear obstructions from fuel supply and ventilating air passages
(TM 9-2320-361-34).
Step 2. Check fuel control valve (TM 9-2320-361-34).
Replace fuel control valve if defective (TM 9-2320-361-34).
END OF TESTING!
51. HEATER OVERHEATS – CONTINUES TO RUN
Test overheat switch (TM 9-2320-361-34).
Replace overheat switch if defective (TM 9-2320-361-34).
END OF TESTING!
52. HEATER OUTPUT TOO LOW
Step 1. Check for obstructed fuel lines or contaminated fuel supply.
If obstructed, clear fuel supply lines (TM 9-2320-361-34 for internal fuel supply;
TM 9-2320-361-20 for external fuel supply).
Step 2. Drain and check fuel control valve (TM 9-2320-361-34).
Replace fuel control valve if defective (TM 9-2320-361-34).
END OF TESTING!
53. HEATER SMOKES AND BANGS WHEN STARTING
Perform malfunction 52.
END OF TESTING!
54. BLOWER WILL NOT STOP AFTER TURNOFF
Check flame detector switch condition (TM 9-2320-361-34).
Replace flame detector switch if defective (TM 9-2320-361-34).
END OF TESTING!
TM 9-2320-386-24-1-2
0293 00
0293 00-12


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