scribe, disengage and remove the rotor retainer
snap ring (119).
This releases the rotor retainers
(120) which should now be moved outward as far as
possible to clear the rotor. Gently lift the hydraulic
head (144) off the distributor rotor (142). Invert the
head and shake out the rotor retainers (120).
(19) Lift off cam ring (122). Check and record
roller-to-roller dimension as instructed in assembly
procedure. This dimension should be 1.977 ±
0.0005. Remove rollers (129, 130), shoes (131, 132)
and plungers (133, 134), only if damaged. Otherwise
secure these parts by using the transfer pump seal
Reassembly may be more easily accom-
plished if the leaf springs (127, 128) are
not removed and shoes with rollers re-
main installed in their original positions.
Leaf springs, if removed, should first
be marked with a dye for original position
Do not remove locating pin
from spline end of rotor.
(20) Remove the governor weight retainer snap
ring (121) using snap ring pliers.
(21 ) Using suitable tool and supporting the head
on a flat surface, press the rotor (142 from the
weight retainer (123 ).
(22) The flexible retaining ring should be repIac-
ed whenever the pump is disassembled. Insert the
snap ring pliers in the closed position, under the
flexible retaining ring between any two of the rivets.
Expand the pliers while applying pressure in an up-
ward direction. A slight twisting motion wiIl snap
the ring off the rivet.
Repeat this process until the
retaining ring is free from all rivets. Discard the
flexible retaining ring.
14-44. Fuel Injection Pump, Inspection and Repair.
(1) Transfer pump blades. Inspect carefully.
Check for chipping on any of the edges, pitting, im-
bedded foreign particles or wear on the rounded ends.
Inspect flat surfaces visually for scores.
While holding the rotor under
clean oil, insert the plungers into their bore. With
thumb and forefinger over the guide slots, tilt from
side to side several times to insure complete freedom
of movement. Interchanging or reversing their indi-
vidual position may be necessary, as these are
Repeat with short set without remov-
ing first set. Replace defective parts. If the plungers
stick, but are not visibly damaged, clean both plungers
and bore with a soft brush and lacquer-removing sol-
vent such as lacquer thinner or acetone. (Do not force
plungers into their bore and do not handle rotor
(3) Distributor head and rotor. Examine the
radii contacted by the springs, and the weight
retainer drive spline for wear. Check all slots,
charging and discharge ports for chipping or ero-
sion of edges and the rotor shank for scratches. If
damage or excessive wear is apparent, the head and
rotor must be replaced as a mated unit. Examine
the rotor timing pin for damage. Check alignment
of tang (at side of rotor locating pin) with center of
shoe slot and rotor discharge port.
(4) Hydraulic head vent wires. Check the vent
wire in the hydraulic head air bleed passage for free-
dom of movement. If the wire is free, flush the
head and blow out all passages with clean, dry air.
If vent wire is stuck, replace it after thorough clean-
ing of the passage.
(5) Cam rollers and shoes. Check each roller
in its shoe for freedom of rotation, and the top edge
of each shoe, where retained by the leaf spring, for
chipping or excessive wear. Improved roller sur-
faces will result from long, normal operation in
(6) Leaf springs.
Check for cracks, nicks, or
chipping, or distortion of leaf spring and wear at
points where the radii on the rotor and along the
steps that retain the roller shoes.
(7) Governor weights and retainer. Examine
the retainer sockets where weights pivot, and pivot
points of all weights for wear and replace the flexible
retaining ring (119). If the retainer can be assem-
bled to the distributor rotor by hand, the retainer
hub must be replaced.
This assembly must be a
press fit. No free play should be evident when the
retainer is assembled to the rotor.
(8) Governor linkage.
Inspect the pivot points
of the governor arm (86) and pivot shaft (85). Ex-
amine the governor arm toes where they contact the
thrust sleeve. If they are worn flat on either toe,
discard and replace.
The linkage gap should not
exceed 0.025 inch Examine the metering valve pin
hole in the linkage hook, throttle lever (40), shut-off
cam (25), and especially the throttle and shut- off
assemblies where joined, for looseness or burrs.
(9) Metering valve and arm assembly. Check
the metering valve body (K3) for wear. Be sure the
metering valve arm (91) is well seated and that there
is no radial movement of the arm on the valve.
Check the metering valve arm pin for wear or loose-
(10) Cam. Since only the working portions of
the lobes on the bore are ground, the tool marks be-
tween lobes should not be considered damaged. The
cam finish is mottled from heat treatment rather
Carefully inspect the bore and edges
of all flat surfaces. If there is evidence of spalling
or flaking out, replace with new cam. Improved
cam lobe finish wilI result from long, normal opera-
tion in clean fuel oil.