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TM 5-4210-220-12
4-19. WINTERIZATION SYSTEM - Continued
g.
Heater Control Thermostat Repair
NOTE
This
can
be
replaced
without
removing unit from truck.
(1)
Remove knurled nut (3) and protection
cover (1) to gain access to thermostat (2).
(2)
Tag and disconnect electrical connections.
(3)
Remove heater control thermostat (2)
and discard. Thermostat is not repairable.
(4)
Install new control thermostat.
(5)
Reconnect electrical connections. Be sure
they are connected the same as the original
unit.
(6)
Replace protection cap (1) and secure with
knurled nut (3).
h.
Fuel Nozzle Assembly Repair.
NOTE
This
can
be
replaced
without
removing complete unit from truck.
(1)
Disconnect fuel lines (6).
(2)
Disconnect wiring harness (7).
(3)
Loosen nuts (1) and swing eyebolts (5)
clear.
(4)
Support burner assembly remove cotter pin
(3). Place burner assembly on clean
workbench area.
(5)
Remove circlip (10) and loosen fuel nozzle
(9) with a wrench.
(6)
Remove nozzle.
CAUTION
Do not clean the nozzle bore hole or the tip with solid objects or wire.
Do not use compressed air, use clean flowing fuel to clean nozzle and strainer.
The nozzle should not be cleaned and re-used except in an emergency. It should be replaced.
4-305
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