PRIMAAX
®
EX / PRIMAAX
®
for Volvo Vehicles
17730-254 31 Component Replacement
SHOCK ABSORBER
THE SHOCK ABSORBERS ARE THE REBOUND TRAVEL STOPS FOR THE SUSPENSION. ANYTIME THE
AXLE ON A PRIMAAXEX / PRIMAAX SUSPENSION IS SUSPENDED IT IS MANDATORY THAT THE SHOCK
ABSORBERS REMAIN CONNECTED. FAILURE TO DO SO CAN CAUSE THE AIR SPRINGS TO SEPARATE
FROM THE PISTON AND RESULT IN PREMATURE AIR SPRING FAILURE. REPLACEMENT OF SHOCK
ABSORBERS WITH NON-HENDRICKSON PARTS CAN ALTER THE REBOUND TRAVEL OF THE SUSPENSION.
DISASSEMBLY
1. Chock the wheels of the vehicle.
2. Remove the lower shock absorber mounting fasteners, see Figure 8-2.
3. Remove the upper shock absorber mounting fasteners.
4. Slide the shock absorber out of the mounting brackets.
5. Inspect the shock absorber mounting brackets and hardware for damage or wear, replace
as necessary, see Preventive Maintenance Section of this publication.
ASSEMBLY
1. Install the shock absorber into the upper mounting bracket.
2. Install the upper shock absorber mounting fasteners. DO NOT tighten at this time.
THE UPPER SHOCK BOLT MUST BE INDEXED INTO THE RECESSED HEX BORE OF THE UPPER SHOCK
MOUNTING BRACKET FOR PROPER FASTENER INSTALLATION. FAILURE TO DO SO CAN CAUSE THE
SHOCK FASTENERS TO BECOME LOOSE AND CAUSE PREMATURE COMPONENT DAMAGE.
3. Slide the lower shock absorber mount into the bottom cap. Install the lower shock absorber
mounting fasteners.
FIGURE 8-2
4. Tighten the upper shock absorber
mounting ¾" locknuts to
175-200 foot pounds torque, see
Figure 8-2.
5. Tighten the lower shock absorber
mounting
5
/
8
" locknuts to
200-225 foot pounds torque, see
Figure 8-2.
6. If the height control valve linkage
bracket was removed, verify the
vehicle ride height. Refer to the
Alignment & Adjustments Section
of this publication.
7. Remove the wheel chocks.
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