TM 9-2320-266-34
Section Il. TROUBLESHOOTING
24-3. Swingfire Heater.
fire heater.
Table 24-1. Swingfire Heater Troubleshooting
Remedy
Type of Trouble
Reason
DOES NOT START
Membrane valve
a. Valve dirty
Clean membrane valve.
Repair damaged membrane.
b. Membrane sticks
Keep interior of housing clean.
c. Membrane damaged
When Swingfire is operating keep
cover closed. Do not remove rubber
plug at the side of housing. Dirt could
enter here.
Mixing chamber
Mixing chamber clogged
Clean mixing chamber, preheating
plug, and spark plug.
Possible leaks
Tighten tank cover or main filter cover
a. Tank cover or cover over main
or replace gaskets if necessary.
filter leaks
Tighten main filter cover. Replace
b. Main filter cover leaks
gasket if necessary.
c. Air valves leak
Clean air valves, check gaskets, and
replace damaged gaskets.
Dismantle and clean valve, replace
d. Control air shut-off valve leaks
gasket if necessary. When pushing the
or is stuck.
pressure pin in, it must bounce back.
e. Air lines leak
Check connections and replace gaskets
where necessary.
f. Fuel lines leak
Tighten connections and replace gaskets
where necessary.
Tighten carburetor screws.
g. Carburetor leaks at mixing
chamber
Remove pump and repair.
h. Diaphragm air pump fails
Remove and clean filter.
Lack of fuel supply
Main fuel filter dirty
Check 24 volt battery system.
Lack of current (no humming
a. No current available from
sound when igniting)
vehicle battery.
Replace circuit breaker.
b. Circuit breaker not working.
Ground plug.
c. Plug is not properly grounded
Repair or replace cable.
d. Defective cable
Replace plug.
e. Defective plug
Replace switch.
f. On/off switch defective
Tighten connections.
g. Electric connections loose
Replace cable.
h. Broken cable
Replace condenser.
i. Cable from condenser broken off
at fastening screw
j. Points are oxydized or burnt
Clean points.
k. Vibrator starting coil damaged
Replace coil.
a. Spark plug clogged or damaged
Clean or replace spark plug.
Lack of ignition (humming tone
Replace plug.
b. Ignition cable plug damaged
audible)
Replace cable.
c. Ignition cable damaged
Change 5
24-3
