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CHAS
SHAFT DRIVE
EAS00726
ALIGNING THE FINAL DRIVE PINION GEAR
AND RING GEAR
NOTE:
@
Aligning the final drive pinion gear and ring
gear is necessary when any of the following
parts are replaced:
• Final drive housing
• Ring gear bearing housing
• Any bearing
@
1. Select:
• final drive pinion gear shim(s)
1
• ring gear shim(s)
2
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a. Position the final drive pinion gear and the
ring gear with shims
1
and
2
. Calculate
the respective thicknesses from information
marked on the final drive housing and the
drive pinion gear.
1
Final drive pinion gear shim
2
Ring gear shim
3
Thrust washer
b. To find final drive pinion gear shim thickness
“A”, use the following formula:
Where:
a
= a numeral (positive or negative) on the
final drive pinion gear, to be divided by 100
and added to “84”. If there is not a numeral
available on the final drive pinion gear,
a
equals zero.
b
= a numeral on the final drive housing, to be
divided by 100 and added to “83”.
Example:
If the final drive pinion gear is marked “+01”
and the final drive housing is marked “50”:
A = (84 + 1/100) – (83 + 50/100)
= (84 + 0.01) – (83 + 0.50)
= 84.01 – 83.50
= 0.51
Final drive pinion gear shim thickness
A = (84 +
a
/100) – (83 +
b
/100)