TM 5-3810-306-34
TABLE 3-1. DIRECT AND GENERAL SUPPORT TROUBLESHOOTING (CONTD)
Malfunction
Test or Inspection
Corrective Action
78.
CAB HEATER COMBUSTION DOES NOT START
Step 1. Overheat thermostat failure.
a.
Inspect thermostat. If OK, do Step 2.
b.
Replace thermostat. (Refer to page 12-2.)
Step 2. Defective glow plug.
a.
Check glow plug. If OK, do Step 3.
b.
Replace glow plug. (Refer to page 12-2.)
Step 3. Fuel (dosing) pump failure.
a.
Check fuel (dosing) pump delivery rate. (Refer to page 12-8.) If OK, do Step 4.
b.
Replace dosing pump. (Refer to page 12-8.)
Step 4. Switch (safety switch) failure.
a.
Remove and test safety switch.
b.
Replace switch. (Refer to page 12-2.)
79.
CAB HEATER COMBUSTION STOPS
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.)
3-48
