AR41.10-P-0086-01P Retrieving Propeller Shaft Articulation Angles From Memory and Correcting If Necessary

AR41.10-P-0086-01P Retrieving propeller shaft articulation angles from memory and correcting if necessary
Data Sheet for Measuring Inclination Angle, Form

Modification notes:

Check values for propeller shaft inclination angle:

Workshop equipment:

Component Identification:

The display indicates that the meter is ready to measure angle 5. This angle is no longer measured.

1 Press MEMORY button once. The main menu appears.
2 Press MEMORY button again.

The measured absolute angle is displayed in the memory and the resultant articulation angle 1and articulation angle 2 is displayed.

3 Record resulting articulation angle 1, e.g. +0.26 degrees and articulation angle 2, e.g. +0.58 degrees on the data sheet.
4 Press the STEP button.

Memory display: inclination angles 1 and 2

The stored data appear in the display as the measured absolute angle and the inclination angle 3 calculated from this figure.

5 Record the resultant articulation angle 3, e.g. -0.08 degrees on the data sheet.

Display of memory: inclination angle 3

Component Identification:

The articulation angles can be calculated using the difference between the respective measured absolute angles.

Front articulation angle (1):
Transmission to front propeller shaft Center articulation angle (2):

Front propeller shaft to rear propeller shaft Rear articulation angle (3):
Rear propeller shaft to rear axle center assembly]

All inclination angles should be as close as possible to the center of the relevant tolerance range.

Correct the rear inclination angle (3)
In the calculation example the front and center articulation angle are within tolerance, the rear articulation angle (3) is outside the tolerance

To correct the rear articulation angle (3), attach a 2 mm thick shim between the rear axle housing and rubber mount, in addition to an existing shim/to existing shims (arrow). A 1 mm thick shim changes the articulation angle by approx. 0.25 degrees to 0.33 degrees.
Shims are available as replacements parts in thicknesses from 1 mm to 4 mm.

The bolt length does not have to be increased when using shims up to a maximum of 6 mm thickness.
If a shim with a thickness more than 6 mm is required, the front rubber mounts of the rear axle mount should be checked for signs of settling or wear and should be replaced if necessary.

Correct the front articulation angle (1) and center articulation angle (2)
Shims in steel or aluminum will need to be fabricated on-site to correct the inclination angle. The dimension for the shims must be taken from the corresponding part.

Depending on the correction the shim must be installed between the:
^ Rear engine crossmember and frame floor.
^ Rear engine crossmember and rear engine mount.
^ Driveshaft intermediate bearing and frame floor.

A 1 mm thick shim changes the inclination angle by approx. 0.17 degrees.

When using shims > 2 mm thick, increase the bolt length by 5 mm.
If you determine that the shim depth required to obtain the desired correction exceeds 5 mm, proceed to inspect the front and rear engine mounts for signs of wear and compression, replace as indicated.

Carry out a check measurement again each time the articulation angle is corrected.

Component Identification:

Example illustration: Shims fabricated onsite for insertion between rear engine cross member and floorpan.
Material: Steel or aluminum

Component Identification:

Example illustration: Shims fabricated onsite for installation between rear engine mount and rear engine cross member.
Material: Steel or aluminum

Component Identification:

Example illustration: Shop-made shims between frame floor and propeller shaft intermediate bearing.
Material: Steel or aluminum