Hendrickson PRIMAAX EX - Page 48

PRIMAAX
®
EX / PRIMAAX
®
for Volvo Vehicles
Component Replacement 48 17730-254
THE WEIGHT OF THE SUPPORT BEAMS AND CROSS TUBE ASSEMBLY IS APPROXIMATELY 225
POUNDS. CARE SHOULD BE TAKEN AT REMOVAL AND INSTALLATION TO PREVENT PERSONAL INJURY
OR DAMAGE TO COMPONENTS.
9. Support the support beams and cross tube assembly with a floor jack that is equipped with
a four inch support plate. Remove the D-Pin ¾ fasteners from both sides of the support
beam.
10. Raise the front of the differential to facilitate removal of the D-Pins from the bottom caps.
11. Lower the floor jack to pivot the support beams and cross tube assembly down from the
bottom caps.
12. Remove the lower shock absorber mounting fastener from the side being serviced.
13. Pivot the lower shock mount out of the bottom cap.
14. Remove the U-bolt fasteners from the clamp group and discard.
15. Remove the bottom cap and inspect for damage or wear. Replace as necessary.
ASSEMBLY
FIGURE 8-33
1. Install the top pad on the top of the axle engaging the dowel
pin. Care should be taken to ensure the thicker ear of the top
pad is mounted to the inboard side of the suspension, see Fig-
ure 8-33.
2. Install the bottom cap and axle spacer (if equipped) on the axle
in the proper direction, with the lower shock mounting holes facing the rear of the vehicle,
see Figure 8-30.
SERVICE HINT It may be necessary to squeeze the U-bolts slightly to facilitate installation through the bottom
axle cap.
3. Install the new U-bolts. Verify that the U-bolts are seated properly in the channels of the top
pad and through the bottom cap.
NOTE Current Hendrickson Truck Suspension Systems U-bolt locknuts for the PRIMAAXEX / PRIMAAX
suspension are ¾"-16 Grade C and are phosphate and oil coated.
4. Install the U-bolt ¾" washers and the locknuts and hand tighten, DO NOT tighten to torque
at this time.
FIGURE 8-34