1. 8 in. Bolt
2. Bearing driver
3. Pilot
4. Main drive gear bearing
5. Receiver cup
6. Nice bearing
7. Flat washer
8. Nut
Figure 7-35. Removing Main Drive Gear Bearing
CLEANING AND INSPECTION
TOOL NAMEPART NUMBER
MAIN DRIVE GEAR BEARING AND
SEAL INSTALLATION TOOL
HD-47932
MAIN DRIVE GEAR SEAL INSTALLERHD-47933
Compressed air can pierce the skin and flying debris from
compressed air could cause serious eye injury. Wear
safety glasses when working with compressed air. Never
use your hand to check for air leaks or to determine air
flow rates. (00061a)
1. Clean all parts in solvent except the transmission case
and needle bearings. Blow dry with compressed air.
NOTE
Do not clean the transmission case and needle bearings.
Normal cleaning methods will wash dirt and other contaminants
into the bearing case and behind the needle bearings leading
to bearing failure.
2. Inspect the main drive gear for pitting and wear. Replace
if necessary.
3. Inspect the needle bearings inside the main drive gear.
Replace the needle bearings if the mainshaft race is pitted
or grooved.
4. Replace the sprocket if teeth are cracked or worn. See
6.6 TRANSMISSION SPROCKET for more information.
5. Inspect the needle bearings on the inside of the main drive
gear. If mainshaft race surface appears pitted or grooved,
replace these bearings.
NOTE
If the main drive gear needle bearings and/or seal need to be
replaced, continue as follows. Otherwise, proceed to
7.7 TRANSMISSION CASE, Assembly.
Needle Bearing Replacement
Wear safety glasses or goggles when removing or
installing retaining rings. Retaining rings can slip from the
pliers and could be propelled with enough force to cause
serious eye injury. (00312a)
1. See Figure 7-36. Remove mainshaft seal (6). Remove
retaining rings (1), needle bearings (2) and spacer (5) from
main drive gear (3). Discard retaining rings.
7-20 2008 Dyna Service: Transmission
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