TM 10-4500-200-13
S e c t i o n X. TROUBLESHOOTING
4-24. General
occur are listed in table 4-2. Each malfunction stated
is followed by a list of probable causes of trouble. The
corrective action recommended is described opposite
and correcting unsatisfactory operation or failure of
the probable cause.
the immersion heater. Malfunctions which may
Table 4-2. Troubleshooting
Malfuntion
Probable cause
Corrective action
1. Heater fails to start
a. Insufficient preheating of flue
Repeat preheating. Leave lighter in flue
compartment until heater starts
b. Vent plug closed
Open vent plug (para 4-11)
c. Fuel tank empty
Remove and fill tank (para 4-1)
d. Water present in combustion
Stop operation and clear water from
chamber
combustion chamber (para 4-15).
2. Burner goes out
a. Fuel tank empty
Remove and fill tank (para 4-1)
b. Vent plug closed or clogged
Open vent plug and be sure it is free
of obstruction (para 4-11}
c. Water present in combustion
Stop operation and clear water from
chamber
combustion chamber (para 4-15).
d. Fuel rate too slow
Open fuel valve (para 4-11)
e. Flame blown out
Close fuel valve slightly (para 4-13)
3. Heater smokes
a. Fuel rate too fast
Close fuel valve slightly (para 4-13)
b. Stack is too short
Be sure to use at least four sections
of pipe (para 4-6).
Section XI. ORGANIZATIONAL MAINTENANCE PROCEDURES
(2) Insert the hinge pin (11), and secure it with
the cotter pin (13).
draft gate supporting screw (20), the draft gate screw
nut (21), and the draft gate (22) from the heater.
b. Inspection. Inspect the draft gate for a warped,
filler plug (4) from the fuel tank (2).
distorted condition. Replace the draft gate as
b. Inspection. Inspect the plug for a damaged
required.
gasket or threads. Replace the plug as required.
gate (22) on the heater body, and secure it with the
filler plug (4) on the fuel tank (2).
draft gate supporting screw (20) and the draft gate
screw nut (21).
a. Removal.
4-26. Hood
(1) Refer to figure 4-6, and remove the wingnut
a. Removal.
(5) that secures the hinged fuel tank strap.
(1) Refer to figure 4-6, and remove the cotter pin
(2) Open the strap and remove the fuel tank (2)
(2) Remove the hinge pin (11) and lift off the hood
from the fuel tank cradle (6).
(12) from the burner collar (21).
b. Cleaning.
(1) Drain the tank.
b. Inspection. Inspect the hood for a distorted
(2) Clean the outside of the tank with a stiff
condition/broken hinge. Replace the draft gate as
brush and hot water.
required.
(3) With the fuel valve removed, flush the fuel
c. Installation.
tank with a small amount of fuel to be sure al'
(1) Refer to figure 4-6, and place the hood (12) on
sediment and foreign matter are removed.
the burner collar (23).
