TM 5-4520-208-15
d. Installation.
pump-to-nozzle hose assembly (68) to
(1) Install engine fuel hose assembly (50)
pipe elbow (53).
on tee (44).
(6)
Secure fuel pump with two screws
(2) Install clamps (42) on engine fuel
(51) and flat washers (52). Install V-
hose assembly (50). Attach clamps to
belt and adjust V-belt tension (pare
fuel pump and magneto brackets with
47)
two screws (41) and self-locking nuts
(7)
Connect pump-to-tank tube assembly
(43).
(49) to straight adapter (34).
(3) Install fuel pump (para 90).
Connect primary bypass pump-to-
(8)
(4) Install power unit (para 12).
coupling tube assembly (56) to cou-
pling (61).
92. Fuel Atomizing Nozzle
(9)
Connect fuel hose assembly (47) to
pipe elbow (48).
a. General. The fuel atomizing nozzle sup-
(10)
Secure pump-to-nozzle hose assembly
plies fuel to the combustor. The atomizer fuel
is combined with air and ignited.
(58) to pump-to-coupling tube assem-
bly (56) with cable tie clamp (59).
b. Removal.
(11)
Install power unit (para 12).
(1) Remove the power unit (para 12). Re-
move fan mounting ring (para 77).
(2) Remove nozzle holder (14, fig. 35)
91. Power Unit Hose Assembly
from combustor plate (5) by disengag-
a. General. A flexible hose assembly delivers
ing combustor clamp (13).
fuel from the fuel tank to the gasoline engine
(3) Remove nozzle (3) from nozzle
power unit fuel filter. Connection at the power
balder.
unit is made with a quick-disconnect coupling.
c. Cleaning and Inspection.
b. Removal.
(1) Clean all parts with an approved sol-
(1) Refer to paragraph 12 and remove
vent and dry thoroughly.
the power unit.
(2) Inspect all parts for breaks, cracks,
(2) Refer to paragraph 90 and remove the
obstructions, damaged threads or
heater fuel pump.
other damage. Replace all damaged
(3) Remove screw (41, fig. 37) and self-
parts.
locking nut (43) attaching engine
d. Installation.
fuel hose assembly (50) to fuel pump
(1) Install nozzle (3, fig. 35) in nozzle
bracket.
holder (14).
(4) Remove screw (41) and self-locking
(2) Install clamp (3, fig. 31) on heater
nut (43) securing engine fuel hose
assembly to magneto bracket. Remove
two loop clamps (42) from hose
(3) Install power unit (pars 12).
assembly.
(5) Remove quick-disconnect coupling half
93. Heater Fuel Filter
(69) from hose assembly.
a. General. Fuel from the tank passes
(6) Remove hose assembly from tee (44).
through an automotive type filter before enter-
ing the fuel pump. The filter has a 40-micron
c. Cleaning and Inspection.
replaceable element which must be removed and
(1) Clean all parts, except clamps, in an
replaced at periodic intervals.
approved solvent and dry thoroughly.
b. Servicing.
(2) Inspect hose assembly for evidence of
(1) Refer to paragraph 12 and remove the
leaking, breaks, cracks, or damaged
power unit.
threads. Inspect quick-disconnect cou-
(2) Loosen star nut (3, fig. 38) and rotate
pling for restricted movement and
retaining bail (2).
damage. Replace damaged parts.
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