ALLIS-CHALMERS
Main bearings are available in stand-
ard size as well as undersizes of 0.010,
0.020 and 0.040.
CRANKSHAFT REAR OIL SEAL
145D.
The crankshaft rear oil seal is
of the one piece spring loaded type.
The seal is retained in the oil seal re-
tainer plate (15—Fig. AC59) which
is retained to the front face of the
engine rear end plate by six screws.
Circular seal (13) fits around seal re-
tainer (15) and forms the rear seal
for the oil pan. To remove the spring
loaded oil seal (14), first remove the
flywheel as outlined in paragraph
146A and pry the seal out of the
groove in the seal retainer plate. To
remove the circular seal (13), it is
necessary to support rear of engine
and remove the engine rear end plate.
OIL PAN
146.
The procedure for removing
and reinstalling the oil pan is evi-
dent. The following, however, should
be observed.
Five of the oil pan retaining cap
screws are longer than the others.
These longer cap screws pass through
the crankcase front cover (timing gear
cover) and into the front face of the
oil pan. The bottom three of these
cap screws must be fitted with copper
washers. When installing the oil pan,
install all of the cap screws loosely;
then,
tighten the front five cap screws
before tightening any of the others.
FLYWHEEL
146A. To remove the flywheel, first
remove the engine as outlined in para-
graph 141. Then, remove the clutch.
The flywheel is held to the crankshaft
flange by cap screws and is doweled
for alignment. Always check the tim-
ing marks of the old and new fly-
wheel when renewing. Examine the
oil seal flange on the front of the
flywheel for nicks and burrs. If any
are found, smooth with a fine stone
Paragraphs 1450-146B
Fig.
AC59A ^ The oil
pump drive gear is re-
tained to the drive shaft
by a pin. After grinding
off the end of the pin, the
pin can be drifted out as
shown.
or crocus cloth. Use caution when
reinstalling to prevent injury to the
oil seal. Torque the flywheel retain-
ing cap screws to 95-105 Ft.-Lbs.
The starter ring gear can be re-
moved by drilling and splitting same
with a cold chisel. To install a new
ring gear heat to 300'' F.-400° F. by
boiling in oil or heating evenly with
a torch. Install new ring gear with
beveled edge of teeth facing rearward.
Note: Do not overheat as ring gear
may be annealed.
OIL PUMP
146B.
The oil pump, which is gear
driven from the camshaft, can be re-
moved after removing the oil pan.
To disassemble the pump, proceed
as follows: File off the head of the
pin which retains the pump driving
gear to the pump drive shaft and us-
ing a small punch as shown in Fig.
AC59A, remove the pin. Remove cover
from pump housing and withdraw
drive shaft and gear and idler gear
and shaft from pump housing. To re-
move the driver gear from the drive
Fig.
AC59 — Chankshaft
rear oil seai (14) is of
the spring loaded type
and is carried in seal re-
tainer (15) whieh is bolt-
ed to the engine rear end
plate (12). Circular seal
(13) forms the rear seal
for the oil pan.
shaft, press gear further up the shaft
until the snap ring is exposed. Re-
move the snap ring and press the gear
off the shaft. Inspect the oil seal (9—
Fig. AC60) in the pump body. There
is no need to remove the seal unless
the seal is damaged. If however, the
seal is removed, always install a new
seal.
Pumping gears should not have over
0.020 backlash nor more than 0.006
end play in pump body, DO NOT in-
Flg.
AC60 — Exploded view of early diesel
engine oii pump. Later models are similar,
but differ in details.
1.
Pin
2.
Gear
6. Drive shaft
6. Idler shaft
7.
Idler gear
9. Oil seal
11.
Snap rlnK
12.
Drive gear
41
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