TM-9-2320-260-34-1
TRUCK, 5-TON, 6X6, M809 SERIES (DIESEL)
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE; VOLUME 1 OF 2
JULY 1994
TM-9-2320-260-34-1 - Page 43 of 657
TM 9-2320-260-34-1
Table 2-1. Mechanical Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
81.
82.
83.
84.
85.
86.
Step 2. Check for defective igniter components.
Replace igniter component(s) if defective (para. 17-3, 17-8, or 17-9).
END OF TESTING!
HEATER STARTS, BUT FAILS TO RUN
Test for defective fuel control valve and overheat switch (para. 17-12).
Replace fuel control valve or overheat switch if defective (para. 17-7 or 17-8).
END OF TESTING!
HEATER RUNS CONTINUOUSLY IN HIGH OR LOW HEAT
Step 1. Check for defective diode.
Replace diode if defective (para. 17-6).
Step 2. Check for defective restriction thermostat.
Replace restriction thermostat if defective (para. 17-5).
END OF TESTING!
HEATER OVERHEATS
Test fuel control valve and overheat switch (para. 17-12).
Replace fuel control valve or overheat switch if defective (para. 17-7 or 17-8).
END OF TESTING!
BLOWER DOES NOT STOP WHEN HEATER IS SHUT OFF
Test flame detector switch (para. 17-12).
Adjust or replace flame detector switch (para. 17-3).
END OF TESTING!
PERSONNEL HEATERS
NOTE
Both personnel heaters, model 10530-A24 and 10530B are
included in malfunction steps 85 through 94, except where noted.
HEATER FAILS TO START
Step 1. Remove heater from vehicle (TM 9-2320-260-20) and perform bench test (para. 17-25).
Step 2. Check for defective igniter components.
Replace igniter component(s) (para. 17-15, 17-18, or 17-19).
END OF TESTING!
FUEL BURNING HEATERS FAIL TO TURN ON
Step 1. Remove heater from vehicle for bench test (TM 9-2320-260-20).
Step 2. Bench test for defective fuel control valve (para. 17-25).
Replace fuel control valve if defective (para. 17-16).
Step 3. Perform electrical wire continuity tests (TM 9-2320-260-20, Electrical Troubleshooting).
Repair wires and connectors if defective (TM 9-2320-260-20).
END OF TESTING!
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