TM 5-4520-208-15
d. Installation.
remove control box (3) from fuel
(1) Install pipe elbows (27 and 30, fig.
control.
34) in
valves. Install pipe nipple
(4) Disconnect nozzle-to-check valve hose
(28), check valve (29), and pipe-to-
assembly (31) from pipe-to-tube elbow
tube elbow (30) in temperature se-
(30) at temperature selector valve. Re-
lector valve.
move two pipe elbows (27 and 30),
(2) Install straight adapter (53) in block
pipe nipple (28), and check valve (29)
and straight adapter (34) in fuel
from temperature selector valve. Re-
tank.
move hose assembly and grommet (63)
(3) Connect block-to-tank tube assembly
from bulkhead.
(33) to block and fuel tank.
(5) Remove grommet (63) from casing
(4) Position coupling-to-valve tube assem-
and carefully pull hose assembly
bly (32) through bulkhead and grom-
through hole in casing.
met (63) and connect tube assembly
(6) Disconnect nozzle-to-check valve hose
to coupling (56) and pipe-to-tube
assembly (31) from nozzle holder
elbow (30).
(40) and remove from heater.
(5) Position nozzle bypass-to-check valve
(7) Disconnect coupling-to-valve tube as-
tube assembly (31) through bulkhead
sembly (32) from coupling (61) and
and grommet (63). Install flexible
from pipe-to-tube elbow (30) at fuel
elbow (62) on tube assembly and con-
control valve. Remove tube assembly
nect tube assembly to pipe-to-tube
and grommet (64) from bulkhead.
elbow (30) at temperature selector
(8) Disconnect block-to-tank tube assembly
valve and to tube assembly from nozzle
(33) from block and straight adapter
holder with tube assemblies (39).
(34) at fuel tank. Remove adapter
(6) Install control box (3) over fuel con-
from fuel tank and straight adapter
trols and secure with two screws (1),
(55) from block.
lockwashers (2), and two screws
c. Cleaning and Inspection. Refer to para-
(7) Install power unit and cabinet (para
d. Installation.
(1) Install pipe elbows (27 and 30, fig.
37) in
valves. Install pipe nipple (28),
98. Heater Control Tube and Hose
check valve (29), and pipe-to-tube
Assemblies (BT400-40-1)
elbow (30) in temperature selector
valve,
a. General. Two tube assemblies and one
hose assembly lead to and from the heater
(2) Install straight adapter (55) in block
contnols. A bypass tube assembly carries bypass
and straight adapter (34) in fuel tank.
fuel from the fuel pump, through a coupling,
(3) Connect block-to-tank tube assembly
to the bulkhead where it connects with the fuel
(33) to block and fuel tank.
control valve. A bypass hose assembly carries
(4) Position coupling-to-valve tube assem-
bypass fuel from the nozzle, through a check
bly (32) through bulkhead and grom-
valve, to the temperature selector valve. Over-
met (64) and connect tube assembly
flow fuel flows from the block through another
to coupling (61) and pipe-to-tube
tube assembly.
elbow (30).
b. Removal.
(5) Position nozzle-to-check valve hose as-
sembl y (31 ) through easing and grom-
the cabinet.
ment (63) and connect hose assembly
to nozzle holder (40).
fan and mounting ring.
(6) Position nozzle-to-check valve hose as-
sembly (31) through bulkhead and
lockwashers (2); two screws (4),
grommet (63) and connect to pipe-to-
tube elbow (30).
68