PRIMAAX
®
EX / PRIMAAX
®
for Volvo Vehicles
Alignment & Adjustments
28
17730-254
PINION ANGLE ADJUSTMENT
ADJUSTMENT OF 1.5 DEGREES OR LESS
FIGURE
7-6
NOTE
When correcting the pinion angle of an axle
the correction must be in equal amounts
on both sides of the axle. However, the total
number of shims per side may differ due to
axle alignment.
1. Loosen the fasteners connecting the
longitudinal torque rods to the frame
hangers.
2. Install or remove shims as required in
equal amounts, to both sides of the axle,
to achieve the proper pinion angle, see
Figure 7-6. To increase the pinion angle
install shims. To decrease the pinion an-
gle remove shims.
SERVICE HINT
A general rule of thumb is,
1
⁄
8
" change in the
shim pack thickness will increase or decrease
the pinion angle by ½ degree.
3. Tighten the longitudinal torque rod fasteners to the proper specification, see Torque Speci-
fication Section of this publication per model designation.
4. Re-check the pinion angle and verify it is within the vehicle manufacturer’s specifications.
ADJUSTMENT OF MORE THAN 1.5 DEGREES
If an adjustment of more than 1.5 degrees is required, it will be necessary to replace the bot-
tom cap with a bottom cap that will achieve the desired pinion angle. After replacement of the
bottom cap perform the drive axle alignment procedure. See Pinion Angle Chart in the Parts List
Section of this publication.