TM 5-4520-208-15
(2) Disconnect nozzle holder with tube as-
86. Power Unit Hose Assembly
semblies (39, fig. 34) by removing
a. General. A flexible hose assembly delivers
two connectors (61) from flexible
fuel from the fuel tank to the gasoline engine
elbows (62) and tube assemblies.
power unit. fuel filter. Connection at the power
(3) Remove nozzle holder and tube assem-
unit is made with a quick-disconnect coupling.
blies from heater.
b. Removal.
(4) Remove the nozzle (3, fig. 35) from
(1) Refer to paragraph 12 and remove the
nozzle holder.
power unit.
c. Cleaning and Inspection.
(2) Refer to paragraph 85 and remove the
(1) Clean all parts with an approved sol-
heater fuel pump.
vent and dry thoroughly.
(3) Remove screw (40, fig. 34) and self-
(2) Inspect all parts for breaks, cracks,
locking nut (42) attaching engine
obstructions, damaged threads, or
fuel metal hose assembly (59) to fuel
other damage. Replace all damaged
pump bracket.
parts.
(4) Remove screw (40) and self-locking
d. Installation.
nut (42) securing hose assembly to
(1) Install nozzle (3, fig. 35) in nozzle
magneto bracket. Remove two loop
balder with tube assemblies (2).
clamps (41) from hose assembly.
(2) Position nozzle holder with tube as-
(5) Remove quick-disconnect coupling half
semblies (39, fig. 34) on heater, with
(60) from hose assembly.
tube assemblies through holes on left
(6) Remove engine fuel metal hose assem-
side of casing. Connect tube assem-
bly (59) from pipe elbow (43).
blies, using two connectors (61), to
c. Cleaning and Inspection.
flexible elbows (62) on tube assem-
(1) Clean all parts, except clamps, in an
blies.
approved solvent and dry thoroughly.
(3) Install clamp (3, fig. 31) on heater
(2) Inspect hose assembly for evidence of
leaking, breaks, cracks, or damaged
threads. Inspect quick-disconnect cou-
(4) Install power unit (para 12).
pling for restricted movement and
damage. Replace damaged parts.
88. Heater Fuel Filter
d. Installation.
a. General. Fuel from the tank passes
(1) Install engine fuel metal hose assem-
through an automotive type filter before enter-
bly (59) on pipe elbow (43).
ing the fuel pump. The filter cannot be dis-
(2) Install loop clamps (41) on engine
assembled or repaired. Remove and replace
fuel metal hose assembly (59). Attach
filter at periodic intervals.
clamps to fuel pump and magneto
b. Removal.
brackets with two screws (40) and
(1) Remove power unit (para 12).
selflocking nuts (42).
(2) Disconnect filter-to-pump metal hose
(3) Install fuel pump (para 85).
assembly (50, fig. 34) from fluid filter
(4) Install power unit (para 12).
(47).
(3) Remove fIuid filter by disconnecting
87. Fuel Atomizing Nozzle
filter from pipe-to-tube tee (44).
a. General. The fuel atomizing nozzle sup-
c. Installation.
plies fuel to the combustor. The atomized fuel
(1) Install fluid filter (47) by connecting
is combined with air and ignited.
inlet end of filter to pipe-to-tube tee
b. Removal.
(44).
(1) Remove the power unit (para 12). Re-
(2) Connect filter-to-pump metal hose as-
move fan mounting ring (para 77)
sembly (50) to outlet end of filter.
and combustor clamp (para 83).
(3) Install power unit (para 12).
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