(11 ) Drive shaft. Inspect the shaft for undue
wear or cracking. Check the shaft diameter where
the governor thrust sleeve (117) slides for scoring.
The drive shaft seal grooves must be absolutely
smooth for the seals to function properly. Check
for alignment of timing roll pin on splined drive
(12) End plate.
Check the regulating piston (55)
for freedom of movement in the sleeve (49). Check
all threads for damage.
The inlet screen (51 ) must
be inspected for damage. All dirt or rust must be
removed from the screen. Do not attempt to re-
move liner-locating pin unless obviously damaged.
(13) Governor arm damper. Check the governor
arm damper assembly for free movement of the pis-
ton (87) within the barrel (88 ). Inspect for chipping
of the piston and for scratches on the piston or
barrel inside diameter.
The bleed orifice in the
barrel should permit free fuel flow when the piston
Replace individual components as nec-
(1) Replace transfer pump blades (67-70) if de-
fective. Always replace both blades if one is defec-
(2) Replace all parts worn beyond allowable
limits or found to be defective during inspection.
(3) During rebuild of pump, replace all springs,
plungers, pistons, metering valve, vent wire, and
cam roller and shoes, only if damaged.
14-45. Fuel Injection Pump Reassembly and Adjust-
ment. Reassemble the fuel pump in the reverse
order of the numerical sequence in figure 14-21 pay-
ing particular attention to the following.
a. All parts must be thoroughly flushed in clean
oil aS they are being reassembled. Cleanliness is
All seals and gaskets must be re-
placed, whether visibly damaged or not.
Install piston seal dry - do not use
grease on the seal.
b. Insert regulating piston seal (56) into the lower
end of the regulating sleeve assembly (57), far enough
to expose retaining ring groove. Install retaining
c. Rinse in clean oil and install regulating piston
(55) and spring (54) into the sleeve, making sure
that the piston slides to the bottom of the sleeve bore
Check for tightness of the orifice plate
and replace adjusting plug if plate
is found loose.
d. Install end plate adjusting plug (48), turning in
until all threads are just below port A.
e. Insert regulating sleeve assembly (57) into its
bore in the end plate (59).
f. Fit the transfer pump thrust disk (63) to the
end-plate (59). The thrust disk may be reversed if
one side appears worn or scratched.
amount of grease will hold the disk in position during
g. Flush distributor rotor (142) in clean oil and
assemble to the bore of the head with a slight rotary
motion. Do not use force. Binding or stickiness
Remove rotor and rinse once more.
h. Flush the hydraulic head (144) and distributor
rotor (142) thoroughly in clean oil and assemble,
while immersed in oil, with a slight rotary motion.
Under no circumstances should any force be used.
Do not handle the rotor shank with the fingers.
i. Place the hydraulic head and rotor assembly
(143 in the holding fixture. Insert the plungers
(133, 134) and the leaf springs (127, 128). Insert
the rollers and shoes and check for freedom of
j . Install the centrality gauge, placing the in-
dicator pin in the metering valve bore and securing
with a head locking screw. Use a connector screw
washer under the head of the screw.
dial indicator retaining screw and slide the indicator
to its outer limit. Install head fitting hand tight and
connect to a supply of clean, filtered, compressed
air. Regulate the air pressure to 40-100 psi.
k. The correct roller-to-roller dimension is
1.977 ± .0005.
Set both sets of rollers (129, 130)
as required adjusting each leaf spring (127, 128) alter-
nately. Since each roller shoe (131, 132) for a given cyl-
inder is controlled by a separate leaf spring, it may be
necessary to invert or interchange leaf springs to ob-
tain correct dimensions on both sets of rollers. Roller
settings of both cylinders must be within .003 of each
1. Check centrality of the rollers (to assure that
each one starts its pumping stroke at the same time)
as follows a) Rotate distributor rotor until one
roller is aligned with dial indicator plunger. Slide
indicator inward until plunger depresses at least
.010. Lock indicator retaining screw. Zero in-
dicator on high point of roller by rotating knurled
dial. b) Rotate distributor rotor (either direction)
until the next roller depresses dial indicator plunger.
Allowable centrality is + .002 (total .004 ). Before