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