Adjustment - Meritor MM-96147 Maintenance Manual

14 Measuring and Recording Driveline Angles
When You Finish Measuring the Driveline Angles
1. Set the tractor's parking brake.
2. Remove the blocks from the front tires.
3. You are now ready to enter the dimensions you recorded on
the Data Gathering Worksheet into the Meritor Driveline Angle
Analysis Program on the disk included with this manual.
Figure 14.21.
Meritor
Driveline
Analysis
Program
Fig. 14.21
Manually Calculating Driveline Angles
If a computer and/or the Meritor Driveline Angle Analysis Program
are not available, driveline joint angles can be calculated manually.
To calculate a joint angle, subtract the measured forward
component angle from the measured rear component angle for
that joint.
Example:
To calculate the fi rst joint angle, you would use the angle
measurements for the transmission and the fi rst driveline.
• Transmission Angle = −2.5°
• First Driveline Angle = −1.0°
• First Joint Angle = −1.0 − (− 2.5) = 1.5°
NOTE: Remember to include the negative sign for negative
component angles. Always use a calculator to ensure accurate
results with the correct negative or positive designations.
MM-96147 / Revised 03-21
Page 82
Angle

Adjustment

Hints for Driveline Set Up
After analyzing driveline angles, keep the following in mind when
performing adjustment or replacement procedures.
• Keep operating angles below fi ve degrees.
• Keep operating angles within one degree of each other.
• Typically, the hypoid and amboid Forward-Rear axle plane
is the same as the Engine/Transmission plane (usually 3 to
3.5 degrees).
• Typically, the hypoid Rear-Rear axle plane is 10.5 to 11.5
degrees.
• Typically, on an amboid model, the Rear-Rear axle plane is
3 to 3.5 degrees.
Recommended hypoid driveline angles are shown in Figure 14.22.
3.0
Fig. 14.22
Recommended amboid driveline angles are shown in Figure 14.23.
3.0
Fig. 14.23
Copyright Meritor, Inc., 2021
2.5-
0.5-
3.5
2.5 1.0
0.5- 2.5-
6.5
2.5
1.0 3.5
-7.0
10.5-
6.5
11.5
-7.0
3.0-
3.5
4005556a
(16579)
Printed in USA