SERVICE MANUAL
Thrust washers are available
in
0.18
mm
(0.007 inch) oversize as well
as
standard
thickness. One set (top and bottom) of
oversize thrust washers may be installed
on one side (front or rear) in combination
with standard size set at other side to
provide oversize adjustment of0.18 mm
(0.007 inch). Two sets of oversize thrust
washers may be used to provide adjust·
ment of 0.36 mm (0.014 inch).
Crankshaft balance weights are
available only in matched pairs because
maximum variation between weights
must. be less than 28 grams (1 ounce).
Tighten weight retaining cap screws to
68-75
N
·
m (50·55 ft.-lbs.) torque, then
bend lock t.abs to lock screws in place.
Check crankshaft against the stand·
ard sizes listed below:
Main Joumal
Diameter
. . . . . . . .
69.81-69.83 rom
(2.7485-2.7492 in.)
Crank pin
Diameter . . . . . . . . 57.11-57.13 mm
Main Bearing
Clearance
MF230, MF235,
(2.2485-2.2492 in.)
MF245 . . . . . . . . . . . 0.08-0.13 rnm
(0.003-0.005 in.)
MF240, MF250 . . . . . 0.05-0.10 mm
(0.002-0.004 in.)
Rod Bearing
Clearance . . . . . . . . . . 0.06-0.10 mm
Crankshaft End
(0.0025·0.0040 in.)
I
Play . . . . . . . . . . . . . . . 0.05·0.38 mm
(0.002-0.015 in.)
Th
reinstall crankshaft, reverse the
removal procedure. Note that main bear
ing caps are numbered
1
through 4 with
number 1 cap at front of engine. The caps
are also marked with a serial number
which corresponds with and must be in
line with serial numbers stamped on bot·
tom of cylinder block. Make certain
thrust washers are installed with
grooved side towards crankshaft.
Tighten main bearing cap screws to 150
N
·
m (110 ft..-lbs.") torque.
CRANKSHAFT REAR OIL SEAL
All Models So Equipped
77.
ROPE TYPE SEAL.
The rope
type rear oil seal is contained in a two
piece retainer attached to rear face of
cylinder block. The rope seal
is
cut to cor·
rect length and should be installed in re·
tainer halves with 0.25-0.50 mm
(0.010-0.020 inch) of the seal protruding
from each end of retainer. Do not trim
ends of seal.
To
install the seal, clamp each half of
retainer in a vise as shown in Fig. 77.
Make sure seal groove is clean. Start
each end of seal in groove wit.h the
specified amount of free end protruding.
Allow seal rope to buckle in the center
until about 25 mm (1 inch) of each end
is bedded in groove, work center of seal
into position, then roll with a round bar
as shown. Repeat the process with the
other half of seal.
Install seal retainer as follows: Clean
sealing swfaces of block, bearing cap
and seal retainers. Coat both sides ofre·
tainer gasket and end joints of retainer
halves with a suitable gasket cement.
Coat swface of rope seal with engine oil.
Assemble retainer halves around
crankshaft and install cap screws loose
ly. Be sure that retainer half with oil
return slot (S-Fig. 77) is toward bottom
of engine. Tighten the two long cap
screws with nuts to 8
N
·
m (6 ft.-lbs.) tor·
que, then tighten cap screws to cylinder
block and bearing to 16 N
·
m (12 ft.-lbs.).
Finish by tightening the two long cap
screws and nuts to final torque of 16
N
·
m (12 ft.-lbs.).
All Models So Equipped
78.
LIP TYPE SEAL.
The lip type
rear oil seal is contained in a one-piece
retainer which is attached to rear of
cylinder block.
When renewing seal, inspect
crankshaft flange for wear in seal con·
tact area. If flange is grooved, seal
should be pressed further into retainer
so
seal lip will contact area
of
flange that
is not worn. The crankshaft seal su1face
may be machined, if necessary, to
smooth seal surface.
Make certain seal is pressed squarely
into retainer. Lubricate seal lip and
crankshaft flange prior to installing
seal. Tighten retainer cap screws to 18
N
· m (14 ft.-lbs.) torque.
FLYWHEEL
All Diesel Models
79.
To
remove the flywheel, first
sepru·ate the engine from transmission
Fig.
78-
The
o/1
pump Is at
tached
to
the front main bear·
lng cap and Is driven via Idler
gear by the crankshaft timing
gear.
Paragraphs
77-
80
housing and remove the clutch.
Flywheel is secured to
crankshaft
flange
by six evenly spaced cap
screws.
To
prop·
erly time flywheel to engine during in
stallation, be sure that unused hole in
flywheel aligns with untapped bole in
crankshaft flange.
CAUTION: Flywheel Is only lightly piloted
to crankshaft. Use caution when unbolting
flywheel to prevent flywheel from falling and
causing possible InJury.
On some models, shims may be in
stalled between the crankshaft and
flywheel. Check for these shims upon
disassembly to prevent loss or damage.
Be sure shims are reinstalled when
flywheel is installed.
The sta•·ter ring gear can be renewed
after flywheel is removed. Heat new ring
gear to 245°C (475°F). Do not overheat
as gear heat treatment could be
destroyed. Install gear on flywheel with
beveled end of teeth facing forward.
Allow gear to air cool.
Reinstall flywheel and tighten mounlr
ing cap screws to 106
N
· m (78 fl..-lbs.)
torque. Check flywheel runout with a
dial indicator after flywheel is installed.
Runout measured at machined swface
of outer diameter must not exceed '0.30
mm (0.012 inch). Runout measured at
clutch swface must not exceed 0.025
m.m
(0.001 inch) for each 25 mm
(1
inch) from
flywheel centerline to point of dial in
dicator measurement. If runout is ex
cessive, remove flywheel and check for
burrs or foreign material.
OIL PAN
All Diesel Models
80. The cast iron oil pan sen,es as part
of tractor frame and as attaching point
for tractor front support.
To
remove oil
pan, first
drain
engine oil. Support trac
tor under transmission housing, then
remove front axle and support housing
assembly. Support oil pan,
remove
re-
35