TM 3-4230-218-30&P
2-3.TROUBLESHOOTING TABLE- Continued.
Table 2-1.
Direct Support Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2.
BURNER WILL NOT EXTINGUISH WHENTHERMOSTAT SELECTOR SWITCH
IS SET TO OFF (OPEN MAG VALVE LIGHT IS OFF) - Continued.
Step 2.
Check for leaking or stuck check valve - Continued.
e.
If open end of return fuel line begins to drip fuel, check valve
is defective or contaminated with dirt.
f.
Reconnect fuel supply line (1) and return line (5) to burner
(2).
g.
Connect burner spark plug lead (3) to spark plug (4).
If check valve is defective, replace check valve (refer to page
2-13).
If check valve is not defective, reconnect return fuel line and test
thermostat selector switch (refer to page 2-62).
3.
BURNER WILL NOT EXTINGUISH WHEN THERMOSTAT SELECTOR SWITCH
IS SET TO OFF (OPEN MAG VALVE LIGHT IS ON).
Test thermostat selector switch (refer to page 2-62).
4.
BURNER WILL NOT LIGHT.
Step 1.
Check for loose or improperly connected wires (refer to page
2-62).
If wires are loose, tighten connections.
If wires are not loose or improperly connected, proceed to step 2.
Step 2.
Check for defective lighting coil in engine.
a.
Remove heater fuel can and panel.
b.
Set up water hoses - remove fuel pump drive belt.
c.
Remove front panel (refer to page 2-64).
d.
Start engine - establish water pressure.
2-4
