Paragraphs 99-102
.007.
Adjust play when it exceeds ,011.
Both bronze thrust washers (S) should
be installed with their beveled inside
diameter facing the first crank throw.
Install steel thrust plate (4) so that
large surface contacts bronze washer.
Shims (9) of .002 and ,008 thick-
ness are inserted between steel thrust
washer and shoulder on crankshaft to
obtain proper end play. To remove
crankshaft it is necessary to remove
engine, clutch, flywheel, rear oil seal,
timing gear cover, and oil pan. Check
the crankshaft journals for wear,
scoring and out-of-round against
values listed below:
Journal diameter
1.999-2,000
Crankpin diameter
1.499-l.SOO
Running clearance OOIS- .002
Maximum 004
Renew or regrind if out-
of-round 003
Main nut torque 7S-8S ft. lbs.
Pal nut torque S-10 ft. lbs,
Undersize mains 002 & .020
CRANKSHAFT REAR
OIL
SEAL
Models B-C-CA-RC
99.
To renew oil seal, separate en-
gine from torque tube and remove
flywheel and carefully lower the oil
pan slightly, or remove it. The one
piece seal is retained to rear surface
of the cylinder block by a retainer and
cap screws. Be sure oil seal contacting
surface on crankshaft is smooth and
true and oil seal is lubricated before
assembly. Latest seals are of felt faced
with neoprene. Copper washers should
.be installed under cap screw heads. If
miner's wick is found at this point,
replace it with copper washers.
Model
G
100.
Shaft rear oil seal is contained
in the one piece main bearing closure
plate which is bolted to the rear of
cylinder block, as shown in Fig. AC4S.
To renew the seal, first remove the
engine and flywheel. Install seal in re-
ALLIS-CHALMERS
tainer so that lip is towards timing
gear.
Fig. AC45—Model
6
showing flywheel
end
of crankshaft.
(1) Oil
pump,
(2) Oil
pres-
sure relief valve,
and (3)
Retainer
for
treated leather
oil
seal.
Fig, AC43-Model
6
crankshaft showing shims
(9) for
adiusting
end
play.
1.
Starting crank
jaw
2.
Crankshaft pulley
3.
Oil
seal
4.
Thrust plate
5. Thrust washer
6. Crankshaft gear
key
7. Bearing shell (upper)
8. Bearing shell (lower)
9. Shims
10.
Crankshaft gear
11.
Oil
slinger
12.
Felt seal
Fig, AC44—Model
G
crankshaft rotates
on two
shim-tess, non-adjustable, slip-in, precis-
ion type main bearings. End play
is
controlled
by
shims back
of
crank
gear.
'30\
3 1/8"
Fig. AC46-WD flywheel marks, WD45
fly-
wheels
are
similar.
Models WC-WD-WD45-WF
101.
Lower half of oil seal which is
located in rear main bearing cap can
be renewed after bearing cap is re-
moved. Renewal of upper half of seal
requires removal of engine, flywheel
and seal retainer. Latest seals are of
felt faced with neoprene.
Do not trim ends of seal as the seal
will compress when bearing cap is
tightened. Make certain oil seal con-
tacting surface on crankshaft is smooth
and true, and seal is lubricated before
assembling.
CRANKSHAFT FRONT
OIL
SEAL
102,
It is possible to renew the
crankshaft front oil seal without re-
moving the timing gear cover. If care
is exercised, such a procedure will give
satisfactory results. At any rate, it is
advisable to loosen all of the timing
gear cover screws when removing the
old seal and to run the engine with
them loosened so as to facilitate cen-
22
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