Meritor MS-113 - Adjust Differential Bearing Preload (Method 2); Section 4 Continued: Runout and Backlash; Check Ring Gear Runout (Radial Movement)

Section 4
Assembly and Installation
Copyright 2002 Maintenance Manual MM-0230
Page 22 ArvinMeritor, Inc. Issued 07-02
Method 2
1. Hand-tighten both adjusting rings against the
differential bearings.
2. Use a micrometer to measure the opposite
surfaces of the bearing caps at X or Y.
Figures 4.16 and 4.17. Record the
measurement.
3. Tighten each bearing adjusting ring one notch.
4. Measure the opposite surfaces of the bearing
caps at X or Y again. Compare the
measurement with the one you obtained in
Step 2.
5. Subtract the measurement you obtained in
Step 2 from the measurement in Step 4. The
difference is the amount the bearing caps have
expanded. Refer to the following example.
O If the measurement is 0.006-0.013-inch
(0.15-0.33 mm): Proceed to Check Ring Gear
Runout (Radial Movement)) in this section.
O If the measurement is not within the
specification above: Repeat Steps 3 and 4
as necessary.
Sample Differential Bearing Preload Calculation
Check Ring Gear Runout (Radial
Movement)
1. Attach a dial indicator onto the carrier’s
mounting flange. Figure 4.18.
2. Adjust the dial indicator so that the pointer is
against the ring gear’s back surface. Set the
dial indicator to ZERO.
Figure 4.16
Figure 4.17
1 MICROMETER
1
X or Y
Measurement
Before Tightening
Adjusting Rings
X or Y
Measurement
After Tightening
Adjusting Rings
Amount
Bearing
Caps Have
Expanded
13.927-inch
(353.74 mm)
13.936-inch
(353.97 mm)
0.009-inch
(0.23 mm)
Figure 4.18