TM 5-3810-306-34
TABLE 3-1. DIRECT AND GENERAL SUPPORT TROUBLESHOOTING (CONTD)
Malfunction
Test or Inspection
Corrective Action
Step 3. Switch (safety switch) failure.
a.
Remove and test safety switch.
b.
Replace safety switch. (Refer to page 12-2.)
80.
CAB HEATER COMBUSTION PRODUCES BLACK SMOKE
Step 1. Motor drive assembly failure.
a.
Replace motor drive assembly. (Refer to page 12-2.)
81.
CAB HEATER DOSING PUMP TICKING NOT AUDIBLE
Step 1. Overheat thermostat failure.
a.
Inspect thermostat. If OK, do Step 2.
b.
Replace thermostat. (Refer to page 12-2.)
Step 2. Fuel (dosing) pump failure.
a.
Check fuel (dosing) pump delivery rate. (Refer to page 12-8.) If OK, do Step 3.
b.
Replace dosing pump. (Refer to page 12-8.)
Step 3. Switch (safety switch) failure.
a.
Replace safety switch. (Refer to page 12-2.)
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