making any correction, check and record centrality
of all four rollers. c) If roller centrality is beyond
specified tolerance, rollers anti/or shoes can be
Recheck centrality after each change.
Be sure to recheck roller-to-roller dimension as in
step k above.
m. Place the cam ring atop the hydraulic head
with the directional arrow pointing clockwise. Re-
member that pump rotation is always expressed as
viewed from the drive end.
The pump will not de-
liver fuel with incorrect assembly of the cam ring.
n. Place the governor weight retainer (123) in
position over the drive on the distributor rotor.
Make sure the assembly marks on the weight retain-
er and the distributor rotor line up with each other.
AssembIe the snap ring to its groove with the snap
o. WhiIe holding this assembly carefully together
so file rotor will not fall out, invert the entire unit
so that the governor weight retainer engages the bar
on the holding fixture.
p. Install delivery valve (141) making sure that it
operates freely in its bore. Install delivery valve
spring (140) and a new delivery valve stop (139). The
stop screw (138) internal hex has one end which is
slightly relieved to clear the deIivery valve stop. Be
sure it faces down. Start the stop screw using the
hex head end of the delivery valve extractor and finish
tightening with a torque wrench to 85-90 inch-pounds.
q. Insert the two rotor retainers (120) by lifting
the head up slightly so that the inside face of the head
is flush with the rotor end. Position the retainers
and install the retaining ring (119).
r. Insert the transfer pump liner (72) so that the
large slot is in line with the head-locating screw hole,
and the letter C, which signifies pump rotation,
This wiIl correctly position the liner locat-
ing slot to accept the locating pin in the end plate.
s. Carefully p lace the transfer pump blades (67-
70)in their slots in the transfer pump rotor. With
one finger, rotate the liner several times to test for
bind. Return the liner to correct position.
t. Insert the transfer pump seal (71) and mount
theend plate (59) so that the inlet fitting is in line
with the metering valve bore, The locating pin will
now line up with the locating slot in the liner. If
these are 180 out of alignment, check the end plate
for correct location of the pin as to pump rotation
(C is on the outside of the end plate). Fasten loosely
with four screws (60) and washers (61, 62); do not
u. Slip the head and rotor assembly (145), drive
endup, into open end of holding fixture. Place the
slx governor weights (116) in their sockets with the
slots facing the bore of the assembly. Place the gov-
ernor sleeve thrust washer (118) against the governor
thrust sleeve (117) so that the chamfered edge faces
the sleeve. Insert the forefinger into the bore of the
sleeve and washer, holding them together, and in-
sert them into the slots of the governor weights by
tilting the weights slightly back. The tab on the
thrust sleeve flange should face upward. Sight
across the tops of the assembled weights to ascer-
tain correct positioning. One weight higher than
others indicates incorrect assembly of the thrust
v. Place the governor arm (86) in position with
thefork for the governor linkage hook facing the end
plate. Insert the pivot shaft (85) (knife edge facing
end plate) and assemble the two seals (83, 84) and cap
nuts (81, 82).
Tighten the cap nuts simultaneously to
a torque of 35 to 40 inch-pounds.
w. The hydrauIic head arid rotor assembly (145),
including the transfer pump, cam ring (122), governor
weight retainer (123), weights (116), governor thrust
sleeve (117), and washer (118), should now be assem-
bled into the housing.
x. Cover shaft knurls with tape and instaII a new
seal (143) on the hydraulic head. Rotate the cam
ring so that the threaded hole is in line with the
metering valve bore.
This will insure proper posi-
tion of the cam.
Apply a light film of clean grease
around the inside edge of the housing to aid in
y. Grasp the hydraulic head firmly in both hands
and insert it into the housing bore with a slight ro-
tary motion. Do not force.
z. If the assembly should cock during insertion,
withdraw and start over.
This is particularly impor-
tant, as cocking can cause particles of metal to be
shaved off the housing and left in the pump, causing
serious damage in operation.
aa. When inserting, make sure the assembly is
wrong into position past the hydraulic head seal (143).
Failure to do this might cause damage to the seal,
resulting in leakage.
When the head and rotor are
finally assembled in their approximate location, ro-
tate them until the head locking screw holes line up
with their corresponding holes in the housing. In-
sert the head lotting screws (146, 147) finger tight.
ab. Invert the pump and holding fixture in the vise
so the bottom faces upward.
ac. Insert and tighten the head locating screw (103).
ad. InstalI seals on piston plugs (96, 111).
ae. Install piston ring seal (106) and piston ring.
af. Assemble advance adjusting screw (112)
(trimmer), advance spring (108) and spring washer
ag. Place trimming screw (112) and spring as-
sembly (108) in piston cavity (power side) and secure
with retaining ring (110).