Paragraphs 53-55
seal bar below rear main bearing cap and then,
removing oil pan, oil pump pressure and suction
pipes,
engine balancer (if so equipped), seal bar, tim-
ing gear cover on four cylinder models and main bear-
ing caps. Crankshaft end play is controlled by the
flanged rear main bearing inserts. Removal of crank-
shaft requires removal of timing gear cover on all
models.
Check crankshaft and main bearings against the
values which follow:
Crankpin diameter 2.5185-2.5193 in.
(63.97-63.99 mm)
Main journal diameter 3.1484-3.1492 in.
(79.97-79.99 mm)
Max. allowable out-of-round 0.002 in.
(0.051 mm)
Crankshaft end play 0.006-0.009 in.
(0.152-0.229 mm)
Main bearing diametral
clearance 0.0028-0.0055 in.
I (0.071-0.140 mm)
Tighten main bearing bolts in three stages; 30 ft.-
lbs.
(40
N-m),
60 ft.-lbs. (80 N-m) and 110 ft.-lbs. (150
N*m).
Main bearings are available in standard size as
well as undersizes of
0.010,
0.020 and 0.030 inch
(0.25,
0.51 and 0.76 mm).
CRANKSHAFT SEALS
Aii Modeis
53.
FRONT. Ib renew the crankshaft front oil seal,
first disconnect battery cables and drain cooling sys-
tem. Unbolt and remove hood, grille and side panels.
Identify and disconnect oil cooler lines, then remove
oil cooler. Cap or plug all openings. On models so
equipped, remove air conditioning condenser and tie
condenser and hoses back out of the way. Unbolt and
remove lower radiator seal strip. Remove wiring har-
ness from fan shroud and lay rearward. Remove radi-
ator side plate bolts, then unbolt and remove upper
radiator air baffle. Remove upper and lower radia-
tor hoses. Unbolt and remove radiator.
If so equipped, unbolt and remove front weights
and weight bracket. Remove front axle assembly as
outlined in paragraph 4, 5 or 8 and front support as
in paragraph 7 or
9.
Remove fan and alternator belt.
Remove three cap screws and flat washer, tap crank-
shaft pulley with a plastic hammer to loosen clamp-
ing ring or pressure rings, then remove crankshaft
pulley. Remove spacer ring and *'O" ring from crank-
shaft, then remove oil seal.
Inspect spacer ring and timing pin for wear or oth-
er damage and renew as necessary. Use a nonharden-
ing sealer on timing pin. When installing spacer ring,
timing pin must engage slot in crankshaft gear. Us-
CASE/iNTERNATiONAL
ing special tool No. 3228341R1 or equivalent, install
new seal with lip toward inside. When installing
crankshaft pulley, align pulley with timing pin. Make
certain clamping ring or pressure rings are properly
positioned, then install flat washer and three cap
screws. Tighten the cap screws evenly in three steps
to a torque of 22 ft.-lbs. (30 N-m) in first step, 44 ft.-
lbs.
(60 N-m) in second step and 47 ft.-lbs. (65 N-m)
in the final step.
Reassembly is the reverse of disassembly
procedures.
54.
REAR. Ib renew crankshaft rear oil seal, first
apply park brake and securely block rear wheels. Dis-
connect battery cables and remove battery. Remove
hood, grille and side panels. Disconnect tachometer
cable, starter wiring and rear wiring connector Shut
off fuel and disconnect supply line and fuel retum
line.
Cap all openings. Disconnect iryection pump
speed control and shut off cables. Identify and dis-
connect oil cooler lines and steering lines and cap all
openings. On models so equipped, disconnect heat-
er hoses and air conditioning lines. On models
equipped with front drive axle, remove drive shaft
shield and front drive shaft. If
available,
attach a split
stand under clutch housing and engine oil pan or
block up under clutch housing and attach a hoist to
engine. Place wood blocks between front axle and
front support to prevent tipping. Unbolt clutch hous-
ing from engine and move front half of tractor
forward.
Unbolt and remove engine clutch and flywheel. Re-
move seal housing retaining cap screws, then remove
seal housing and rear oil seal. Remove seal from
housing.
Inspect sealing face on crankshaft for wear groove.
New seal can be installed in any of three locations:
0.060 inch (1.5 mm) above flush with rear face of
housing (new engine original position), flush with
housing or 0.060 (1.5 mm) below flush with housing.
Location of seal will depend on condition of sealing
surface on crankshaft. Use new gasket and install seal
housing with new oil seal. Tighten oil seal housing
cap screws to a torque of 11 ft.-lbs. (15 N-m), then
retighten to a torque of 14 ft.-lbs. (19
N-m).
Reassem-
ble by reversing disassembly procedure.
FLYWHEEL
Aii Modeis
55.
Ib remove the flywheel, refer to procedures
outlined in paragraph
54.
Ib install new flywheel ring
gear, heat same to approximately 400-520° F (200-
270° C).
WARNiNG: Aiways wear heat protective gioves
when handiing heated parts.
38
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