Discard gasket (17).
(b) Lift drive and driven gears and shafts
from gear pump body.
(c) Check pump shafts (14 and 15) for wear
Replace shaft if worn smaller than
0.4998 to 0.5001 inch (12.695 to 12.703
(d) If gears are scored or worn badly, the
gears must be replaced.
(e) Check gear body and cover for scoring
or wear; replace parts as needed.
(f) Check lubrication holes in cover and
body; they must be clean.
(g) Lubricate and slide shafts and gears into
(h) Position new gasket (17) and install
body to cover. Align locating notches
(i) Secure cover and body with dowels,
tighten capscrews to 11 to 13 foot-
pounds (15 to 18 joules). Check to see
that pump turns freely with finger
(j) Install a gear pump to fuel pump with
screws (3), lockwashers (4), screws (6),
washers (8), and lockwashers (7).
(k) Install elbow (9) and orifice elbow (1).
(43) Pulsation Damper Overhaul.
(a) Remove body (5, figure 13-25) from
(b) Remove spring steel diaphragm (7);
discard O-rings (6 and 8) and nylon
(c) Check for corrosion, excessive wear, or
cracks in cover or diaphragm. Replace
(d) Install new O-rings (6 and 8) in grooves
and new nylon washer (9).
(e) Coat the diaphragm (7) with 10W or
20W oil and lay in cover (10).
Assemble cover to housing, and attach
to fuel pump; replace O-ring (4) and
torque capscrews to 11 to 13 foot-
pounds (15 to 18 joules).
(44) Fuel Shut-Off Valve Overhaul.
(a) Remove four screws (5, figure 13-22),
coil (6), fuel shield (7), O-ring (8), spring
(9), and valve (10). Discard O-ring (8).
(b) Remove manual override knob (12) and
unscrew override shaft (14). Remove
and discard O-ring (13).
(c) Clean all parts except the coil assembly
(6) in mineral spirits.
Do not wet the coil with solvent; instead,
wipe it with a clean lint-free cloth.
(d) Visually check valve and valve seat for
wear, bonding, failure, or corrosion.
Replace if necessary. Valve seat
should have a minimum seat 0.015 inch
(0.38 mm) wide.
ohmmeter; replace if coil resistance is
below 30 ± 2 ohms.