Pinion Flange Runout Measurement System Balanced Flange
Tools Required
• | J 8001 Dial
Indicator Set, or equivalent |
• | J 23409 Dial
Indicator Extension, or equivalent |
System balanced drive
axles utilize a deflector design on the pinion flange, that is able to hold
system balance weights on its outside diameter.
- Raise and support the vehicle, with the wheels free to rotate.
Refer to
Lifting and Jacking the Vehicle
in General information.
- Remove the propeller shaft from the pinion flange.
- Install the J 35819
to the pinion flange.
- Assemble and install the J 8001
and the J 23409
to the drive axle and to the J 35819
.
Important: The dial indicator will display inverted readings. You are measuring
the inside diameter of the flange, not the outside diameter. The highest reading
on the dial indicator is the low spot; the lowest reading is the high spot.
- Rotate the pinion flange 360 degrees and zero the dial indicator
on the low spot.
- Rotate the pinion flange again and record the total runout.
Important: All runout measurement tolerances provided are to be used as guidelines.
The measurement tolerances provided and their effect on vibration correction
may vary for each vehicle.
- If the system balanced pinion flange runout measurement is between 0.00-0.38 mm
(0.00-0.015 in), the pinion flange is considered within acceptable
runout limits.
- If the system balanced pinion flange runout measurement exceeds
0.00-0.38 mm (0.00-0.015 in), the pinion flange
must be reindexed 180 degrees or replaced.
If the drive axle utilizes a crush-type sleeve to achieve pinion bearing
preload, the pinion flange can only be removed and installed 1 time
before the crush-type sleeve must be replaced. Sleeve replacement requires
removal and installation of the ring and pinion gear set. If there is evidence
that the pinion has been removed and installed previously, replace the sleeve.
- If the pinion flange has been reindexed, remeasure the pinion
flange runout.
- If the runout remeasurement of the reindexed pinion flange still
exceeds the tolerance guidelines, the pinion flange requires replacement.
Important: Inspect the runout of any replacement pinion flange.
- If the pinion flange was replaced, check the runout of the replacement
pinion flange.
Important: If the pinion flange was reindexed or replaced, the driveline MUST be
system balanced.
- If the pinion flange was reindexed or replaced, system balance the driveline.
Refer to
Driveline System Balance Adjustment
.
Pinion Flange Runout Measurement Non-System Balanced Flange
Tools Required
• | J 8001 Dial
Indicator Set, or equivalent |
• | J 23409 Dial
Indicator Extension, or equivalent |
Drive axles that are non-system
balanced use a pinion flange dust slinger design, that is able to hold a runout
compensation weight on the face of the dust slinger.
- Raise and support the vehicle, with the wheels free to rotate.
Refer to
Lifting and Jacking the Vehicle
in
General information.
- Remove the propeller shaft from the pinion flange.
- Install the J 35819
to the pinion flange.
- Assemble and install the J 8001
and the J 23409
to the drive axle and to the J 35819
.
Important: The dial indicator will display inverted readings. You are measuring
the inside diameter of the flange, not the outside diameter. The highest reading
on the dial indicator is the low spot; the lowest reading is the high spot.
- Rotate the pinion flange 360 degrees and zero the dial indicator
on the low spot.
- Rotate the pinion flange again and record the total runout.
Important: All runout measurement tolerances provided are to be used as guidelines.
The measurement tolerances provided and their effect on vibration correction
may vary for each vehicle.
- If the pinion flange runout is 0.15 mm (0.006 in) or less,
there should not be a runout compensation weight. If there is a compensation
weight, remove the weight.
- If the pinion flange runout is greater than 0.15 mm (0.006 in)
but less than 0.28 mm (0.011 in) and the runout compensation
weight is at or near the low spot, no further action is necessary. If the
runout compensation weight is not at or near the low spot, remove the weight.
- If the pinion flange runout is greater than 0.28 mm (0.011 in)
but not greater than 0.38 mm (0.015 in) and the runout compensation
weight is at or near the low spot, no further action is necessary. If the
runout compensation weight is not at or near the low spot, remove the weight
and re-index the pinion flange until the runout is 0.25 mm (0.010 in)
or less.
If the drive axle utilizes a crush-type sleeve to achieve pinion bearing
preload, the pinion flange can only be removed and installed 1 time
before the crush-type sleeve must be replaced. Sleeve replacement requires
removal and installation of the ring and pinion gear set. If there is evidence
that the pinion has been removed and installed previously, replace the sleeve.
- If after reindexing the pinion flange, it is not possible to achieve
runout of 0.25 mm (0.010 in) or less, the pinion flange requires
replacement.
Important: Inspect the runout of any replacement pinion flange.
- If the pinion flange was replaced, check the runout of the replacement
pinion flange.