------------PART 1 - ENGINE SYSTEMS------------
4. Remove the flywheel attaching bolts and care-
fully remove the flywheel.
INSPECTION AND REPAIR
1. Inspect the flywheel ring gear and replace if the
teeth are damaged. Check the flywheel for
damage due to loosely or improperly fitted ring
gear.
2. A damaged flywheel ring gear should be re-
moved and replaced as follows:
• Cut the old ring gear free from the flywheel.
• Thorougly clean the mating surfaces of the new
ring gear and the flywheel.
• Use temperature indicating crayons to mark the
side face of the ring gear at six equally spaced
locations. Mark with a 40QOF (204°C) crayon at
a point
½ in. (13 mm) below the root of the
teeth and mark with a 4SOoF (2120C) crayon at
a point just below the root of the teeth.
• Use an oxy-acetylene torch with a tip size No.
2 maximum and direct the flame against the in-
ternal face of the gear.
• Stop applying heat when the 40QOF (204°C)
crayon marks melt and before the 45()0F (2120C)
crayon marks melt.
• Quickly place the hot gear on the flywheel with
the flat face against the shoulder on the
flywheel.
INSTALLATION
1. Clean the crankshaft rear flange and the mating
surface of the flywheel.
2. Establish the correct alignment of the flywheel to
crankshaft mounting holes and install the
flywheel. Tighten the attaching bolts to the cor-
rect torque and recheck the flywheel run-out, see
"Specifications," Chapter 3.
3. Install the pressure plate and clutch disc assembly,
see "Clutches," Part 4.
4. Reassemble the tractor, see "Separating the Trac-
tor," Part 12.
24
CRANKSHAFT:
REMOVAL
1. Remove the engine from the tractor, see
"Separating the Tractor," Part 12 and place on
an engine stand.
2. Remove the pressure plate and clutch disc
assembly from the flywheel see "Clutches," Part
4.
3. Remove the flywheel and engine rear cover plate.
4. Remove the crankshaft pulley and engine front
cover.
NOTE: If the crankshaft is removed with the
cylinder head in position, be sure all timing marks
are realigned prior to reassembly. This action will
prevent possible interference between the valves
and piston during reassembly.
5. Remove the oil pan, the oil pump, intermediate
shaft.
6. Remove the connecting rod and main bearing
caps and liners and identify to facilitate
reassembly.
7. Carefully lift the crankshaft out of the cylinder
block.
INSPECTION AND REPAIR
NOTE:
Current production engines may have a
crankshaft with main or crankpin journals ground
0.010 in. (0.25 mm) undersize. These are identified
with the letters '010 MUS' and/or '010 PUS'
respectively. The letters are stamped on one of
the crankshaft counterbalance weights.
1. If the crankshaft gear teeth are excessively worn
or chipped, install a new crankshaft gear which
must be fully located on the shoulder of the
crankshaft.
2. Clean the crankshaft and drilled passages. Dress
minor imperfections with an oil stone and refinish
severely marked journals to the next undersize
bearing.
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