shaft assembly from the pump body.
(1) Remove the pump driven gear and
shaft assembly from the pump body.
(m) To prevent damage to the drive gear
teeth and driven gear teeth do not remove the gears
from the shaft with a gear puller. Press the gears
from the shafts.
14-66. Cleaning, Inspection and Repair.
Wash all pump parts in cleaning solvent,
Federal Specification P-D-680.
b. Inspect the oil pump drive gear, the driver gear
and shaft assembly and the driven gear and shaft
assembly for wear and chipped teeth. Replace worn and
Inspect the inside of the pump body and the
inner face of the cover for wear or scoring. Replace
Inspect the relief valve piston. It must
slidesmoothly in the bore of the relief valve body.
Replace a damaged relief valve or body.
Inspect the heater element for cracks, and
1oose or bent fins. Replace element, if it is severely
Inspect oil pan for dents or cracks. Dents
must be smoothed out. Replace oil pan if badly dam-
g. Inspect suction tube assembly for holes and
14-67. Reassembly and Installation.
a. Heat the driven oil gear in oil to 350° + 25°
and press onto the shaft 0.848 inch from end.
b. Repeat step a. for the driver oil gear, ex-
cept that the gear is pressed onto the shaft 1.812
inches from the end.
c. Lubricate gear and shaft. Install the long
end of the driven gear and shaft assembly into the
lower chamber of the oil pump body.
Lubricate gear and shaft. Install the short
end of the driver oil gear and shaft assembly into the
upper chamber of the oil pump body.
e. Assemble the pump cover onto the pump
body. Use the two 5/8-inch long, grade 5, lock bolts
in the top holes.
The six other holes use 1-inch
bolts with a lockwasher. Tighten the bolts to a torque
of 18 to 20 foot-pounds.
Before proceeding make certain that the
assembled pump will turn freely without binding.
h. Install the piston, spring, and spring re-
tainer in the relief valve body. Depress relief valve
spring and retainer with two screwdrivers or an im-
provised two-prong tool. Insert a 3/16-inch, or
less, drift pin into the roll pin hole. Hold the re-
tainer with the drift pin until the roll pin is installed.
Install the relief valve assembly into the
pump body and tighten securely.
Install the suction screen assembly onto the
k. Install heater element in the oil pan and
secure it with nuts, lockwashers and capscrews.
Install the brass fittings on the inside and
outside of the oil pan.
Lubricate oil pump drive gear and install
oil pump assembly onto the cylinder block with the
drive gear in mesh with the crankshaft gear. In-
stall bolts and torque to 68 to 73 foot-pounds.
n. Position brass fittings and O rings and in-
stall oil discharge tube to cylinder block and oil
pump assembly; tighten fitting securely.
o. Install support bracket and clamp securing oil
Install a new gasket set to the rails of the
For ease of installing the oil pan, make up
two guide studs and screw them into the diagonal
corners of the cylinder block.
Position the oil pan with the front end up and
mount the oil pan on the guide studs. Hold it in
position by inserting a capscrew and lockwasher in
each corner, but do not tighten them so that the oil
pan can be shifted.
Remove the guide studs. Install the 3/4-
inch long capscrews and lockwashers which hold the
rear flange of the oil pan to the flywheel housing.
Tighten the rear corner capscrews in the side rail
and the two upper capscrews in the flywheel housing
alternately, until secure.
Install the 1-inch long capscrews and lock-
washers, securing the front rail of the oil pan to the
timing gear cover.
Install the remaining capscrews
and lockwashers. Tighten all capscrews securely to
a torque of 28 to 33 foot-pounds.
Install drain valve into oil pan and tighten
v. Install oil
lines to the heater
drain hose, and connect coolant
element if winterization kit is in-
g. Heat the oil gear shaft and press the drive gear
onto the shaft allowing 0.057 to 0.062 inch to protrude.