TM 5-4520-208-15
141. Discharge Air Temperature Not in
138. Heater Exhaust Smoking Excessively
Correct Range or Temperature
Possible remedy
Probable cause
Fluctuates
Air flow restricted -------- Remove restriction.
Possible remedy
Probable cause
Replace defective tempera-
Temperature selector
139. Combustor Fire Cuts Out on Overheat
ture selector valve
valve defective.
Possible remedy
Probable cause
Temperature selector valve Replace temperature
142. Maximum Heat Not Obtainable
sensing element capillary selector valve (paras
Probable cause
Possible remedy
100 and 157).
tube ruptured.
Fuel control damaged -------- Replace fuel control
140. Combustor Fire Fails to Cut Out on
Temperature selector
Replace defective
valve defective.
temperature selector
Overheat
valve (paras 100 and
Possible remedy
Probable cause
157) .
Replace defective tempera-
Temperature selector
Replace combustor or heat
Combustor or heat
ture selector valve (paras
exchanger damaged.
exchanger (paras 161
valve defective.
and 165).
100 and 157).
Section III. REMOVAL AND INSTALLATION OF MAJOR
COMPONENTS
143. Power Units
148. Fuel Control Components
Refer to paragraph 97 through 100 for re-
Refer to paragraph 12 for removal and in-
moval and installation of control tube assem-
stallation of the gasoline engine and electric
blies, fuel valves, and discharge temperature
motor power units.
gage.
144. Heater Magneto
Refer to paragraph 82 for removal and in-
149. Heater Exhaust System
stallation of the heater magneto.
Refer to paragraph 79 and 80 for removal
and installation of the engine exhaust ex-
145. Heater Fuel Pump
tensions and exhaust stack.
moval and installation of the heater fuel pump.
150. Heater Combustor
a. Removal.
moval and installation of the heater fuel pump.
(1) Remove power unit (para 12).
(2) Remove combustor plate (para 89).
146. Vaneaxial Fan and Mounting Ring
(3) Remove nozzle holder (para 87, BT-
Refer to paragraph 77 for removal and
400-40 or para 92, BT400-40-1).
disassembly of the vaneaxial fan and mounting
(4) Remove 16 self-locking nuts (9, fig.
ring.
combustor assembly (6) to heat ex-
147. Fuel Atomizing Nozzle
changer. Remove combustor and gas-
ket (7) from heat exchanger
moval and instillation of the fuel atomizing
b. Installation.
nozzle.
(1) Position the gasket (7, fig. 36) and
combustor assembly (6) on heat ex-
changer. Locking tabs on combustor
removal and installation of the fuel atomizing
must be in a vertical position. Secure
nozzle.
90
