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Figure 11-13. Position of Flywheel Bearing.
NOTE:
Improper positioning of bearings could
result in engine failure due to lack of
lubrication.
4. Measure the crankshaft end play with a flat feeler
gauge. The recommended crankshaft end play is
.002/.014".
Exchange thrust washer, if necessary, to bring end
play within range. Three sizes of thrust washers
are available: .121", .130" (STD), and .139".
Roller Thrust Bearings
Some engines for high thrust applications use a roller
thrust bearing and flat thrust washers on the flywheel
end of the crankshaft. Refer to Figure 11-14.
Flywheel End
Shaft Locating Washer
О! Crankshaft
Roller
Sleeve
Bearing
Bearing
Side
Side
Flat Thrust Washer
/
Roller Thrust Bearing
Sleeve Bearing
Figure 11-14.
Installing Roller Thrust Bearings.
SECTION 11
REASSEMBLY
Install the .039" thrust washer, roller thrust bearing,
.156" shaft locating washer, and flanged sleeve bear-
ing to flywheel end of crankshaft.
INSTALL TAPPETS AND CAMSHAFT
1. Lubricate the stems of tappets with engine oil.
Install the tappets into crankcase sides. Make
sure that used tappets are reinstalled into the
proper sides and positions (intake or exhaust) as
marked during disassembly.
NOTE:
The intake valve tappet is closast to the
flywheel side of crankcase. The exhaust
tappet is closest to the PTO side of
crankcase.
2. Put tape or governor spring around the tappet
stems in the #2 crankcase side. This prevents the
tappets from falling into the #1 side when reas-
sembling crankcase.
Refer to Figure 11-15.
Figure 11-15. Holding Tappets (#2 Side) Using
Governor Spring.
3. Place the camshaft into the #1 side of crankcase.
Make sure the timing mark on crankshaft aligns
with the timing mark on cam gear. Refer to
Figure 11-16.
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