-------------PART 1 - ENGINE SYSTEMS------------
NOTE:
Flywheel to crankshaft bolts must be in-
stalled using Loctite Thread Sealer and torqued
to specifications. Use 9/ 16-18 grade 8 bolts only.
Figure 57
Checking Rear Main Bearing Oil Seal Runout
1. Dial Indicator Gauge 3. Crankshaft Oil Seal
2. Crankshaft
4.
Cylinder Block
CAMSHAFT
REMOVAL
NOTE:
The camshaft bearings and/or tappets can
only be serviced with the engine removed from the
tractor and mounted on an engine stand. See
"Separating the Tractor," Part 12.
1. Remove the engine front cover and cylinder head.
2. Remove the oil pump drive gear and shaft.
3. Check the camshaft end play as previously
described in this Chapter. If the clearance exceeds
the specified limit, see "Specifications," Chapter
3, install a new thrust plate during reassembly.
4. Invert the engine on the stand and remove the oil
pan if the camshaft bearings and/ or the tappets
are to be removed.
5. Remove the bolt and flat washer and remove the
camshaft gear.
28
6. Remove the bolts and lockwashers and remove
the camshaft thrust plate.
7. Remove the camshaft from the front of the
engine.
8. lift out the tappets and place in a numbered rack
to facilitate reassembly.
Figure 58
Camshaft Bearing Removal and Installation
1. Bearing 3. Tool No. 1443
2. Oil Hole 4. Tool No. 1255
INSPECTION AND REPAIR
1. Inspect the camshaft journals and lobes for
damage, pitting or heat discoloration.
2. Inspect the oil pump drive gear on the camshaft
for broken or worn teeth. Check the mating gear
on the oil pump drive shaft. If any damage is ap-
parent, install a new camshaft and/ or oil pump
drive gear.
3. Measure the diameter and out-of-round of the
bearing journals. If the journals exceed the
specified limits, install a new camshaft. See
"Specifications," Chapter 3.
CAMSHAFT BEARINGS
1. Inspect the camshaft bearings for pitting or
scoring. Measure the clearance between the in-
ternal diameter of the bearings and the outside
diameter of the respective camshaft journals.
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