TM
55-1730-229-12
AG
320A0-OMM-000
TO
35C2-3-473-1
TM
1730-12/1
FOUR-WAY VALVE.
(5) Remove fuel pump support clamp
(6) by removing two nuts (7), lock
washers (8), washers (9) and cap screws
a.
Inspect.
(See figure 4-46.)
(10)l
(1) Inspect four-way valve (1) for
cracks, surface damage, corrosion or
(6) Remove fuel pump (3).
obvious damage. No cracks, corrosion or
damage is permitted.
(7) Remove elbows (11, 12), drain
elbow (13) and adapter (14) for install-
(2) Inspect four-way valve fit-
ation in replacement fuel pump.
tings, hose assemblies and connections
for evidence of fuel leakage. No leaks
Install.
(See figure 4-46.)
are permitted. If tightening connections
c.
and/or fittings does not stop leakage,
part
(1) Apply thread sealant,
replace leaking components.
number LH-150, to threads and install
elbows (11, 12), drain elbow (13) and
(3) Inspect attaching hardware for
adapter (14) in replacement fuel pump
security. Tighten loose attaching hard-
ware. Replace missing hardware.
(3) l
(2) Position fuel pump (3) in
b.
Remove. (See figure 4-46.)
place on fuel pump support bracket (15)
and install fuel pump support clamp (6).
Secure with two cap screws (10), washers
Aviation fuel is flammable and
(9), lockwashers (8) and nuts (7).
irritant to skin, eyes and res-
(3) Remove tags and connect two
piratory tract. Avoid repeated
white leads of cable (5) to fuel pump
or prolonged skin contact. Handle
(3). Ensure correct size butt splice and
only in well ventilated areas.
crimp.
Keep away from sparks, open flames
or other sources of ignition.
(4) Connect fuel tube (4) to fuel
pump (3) outlet and fuel tube (2) to
(1) Drain fuel tank.
fuel pump inlet. Torque connectors 120
+20 inch-pounds.
(2) Open drain valve (1, figure
4-47). Catch draining fuel in a suit-
(5) Close drain valve (1, figure
able container.
4-46) to INTL.
(3) Disconnect hose assembly (16,
(4) Disconnect hose assembly (18)
from straight adapter (19).
Aviation fuel is flammable and
irritant to skin, eyes and res-
(5) Remove four-way valve (1) from
piratory tract. Avoid repeated
valve support (20) by removing nuts
or prolonged skin contact. Handle
(21), lock washers (22), washers (23)
only in well ventilated areas.
and screws (24).
Keep away from sparks, open flames
or other sources of ignition.
(6) Remove tube
adapter
(17),
straight adapter (19), elbow (25) with
(6) Bleed the fuel system of air
cap nut (26) and plug (27) for install-
in accordance With paragraph 4-1, step
ation in replacement four-way valve.
k. Continue bleeding until an air-free
Clean all traces of pipe sealant from
flow of fuel is attained.
adapters , plugs and elbow.
Change 2
