4-29. FUEL LINES AND FITTINGS MAINTENANCE INSTRUCTIONS - Continued
Coat threads of adapter fitting (11) with loctite
Pull or cut fuel line (10) from adapter fitting (11)
and install in fuel injector.
at fuel injector.
Install banjo fitting (14) to fuel pump inlet with hol-
Pull fuel line (13) from banjo fitting (14), and pull
low screw (8) and two copper washers (9).
fuel line from retainer on air shield.
Secure small banjo fitting of fuel line (10) to re-
10. Remove adapter fitting (11) from fuel injector. In-
turn port on fuel tank with hollow screw (6) and
stall a protective dust cap in fuel injector to pre-
two copper washers (7).
vent entry of dirt.
Ease open end of small fuel line (10) hose to
11. Remove metal fuel line (12) from fuel injector and
adapter fitting (11). Install fuel line (13) through
fuel pump. Install protective dust caps on open
retainer on air shield and ease onto banjo fit-
ports of fuel injector and injector pump to prevent
entry of dirt.
If removed secure clamp (2) to engine using at-
taching hardware from fuel tank support bracket.
Using separate length of fuel line (3), ease one
end onto outlet nipple of fuel tank. Secure by slid-
ing clamp (5) over hose and over outlet nipple.
Tighten clamp sufficiently to prevent leakage.
P-D-680, Type III, is moderately toxic to
the skin, eyes and respiratory tract;
Install new fuel filter (4), noting the direction of
avoid prolonged exposure. Skin and
flow arrow on side of fuel filter, to determine inlet
eye protection is required. Good ventila-
and outlet nipples.
tion is required. Do not use near open
flame or excessive heat. Flash point is
Insert inlet nipple of fuel filter (4) into fuel line (3)
200 degrees F (93.3 degrees C).
coming from the fuel tank.
Clean fuel lines and fittings with a cloth damp-
10. Insert outlet nipple of fuel filter (4) into fuel line
ened in dry cleaning solvent and dry thoroughly.
(10) leading to fuel pump.
Use a soft-bristle brush to remove caked dirt.
11. Seat fuel lines fully onto filter nipples.
Inspect sealing surfaces of copper washers (7
and 9) for damage that would provide for leakage.
12. Slide clamps (1 and 2) over fuel lines and secure,
firmly compressing lines onto nipples of the fuel
Inspect threads on fittings for damage.
filter. Do not tighten clamps excessively.
Replace all damaged components with new parts.
13. When refueling fuel system for the first time,
check for fuel leakage at clamps.
Follow-on tasks include: Service fuel tank
Install fuel line (12) to fuel pump outlet and fuel in-
jector inlet. Tighten sufficiently to seal connec-
tion, without overtightening.