3-52
Figure 3-70. Flywheel and Connecting Rod Assembly
NOTE
Same configuration on both flywheels.
1. Crank pin nut (sprocket side)
2. Flywheel (sprocket side)
3. Connecting rods
4. Crank pin roller and retaining set
5. Flywheel (gear side)
6. Crank pin
7. Crank pin key
8. Crank pin nut (gear side)
9. Pinion bearing inner race
10. Flywheel washer (2)
b0059x3x
Counterbore for
stepped washer (10)
5
10
6
7
4
10
2
3
Under cut
(shaded area)
8
9
1
Lapping Connecting Rod Races
Connecting rod lower races that are likely to clean up within
range of oversize bearing rollers and are otherwise in service-
able condition, should be trued and sized with CONNECTING
ROD LAPPING ARBOR (Part No. HD-96740-36).
1. Clean lap before using.
2. See Figure 3-71. Clamp lap into lathe chuck, carefully
load lap with #220 grit grinding compound, mixed with oil.
Adjust lathe to turn at approximately 150-200 RPM.
3. Carefully slide connecting rod over lap. Adjust lap to a
dragging, but free, fit in rod race.
NOTE
A loose lap will BELL MOUTH bearing races, so lap must be
kept adjusted at all times.
4. Start lathe and work rod back and forth, over full length of
lap. Hold rod as near race end as possible.
5. Check rod frequently. When rod is lapped true and all
traces of pit marks or grooves are cleaned up, wash and
blow rod dry.
6. Repeat lapping procedure for other rod race.
7. Bearing races should have a soft velvety appearance
and be free of shiny spots.
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