Preventive Maintenance; Areas Of Inspection; Hendrickson Recommended Preventive Maintenance Intervals; Section 6 Preventive Maintenance - Hendrickson PRIMAAX EX Technical Procedures

PRIMAAX EX / PRIMAAX
®
SECTION 6

Preventive Maintenance

NOTE
Preventive Maintenance
for Volvo Vehicles
®
Following appropriate inspection procedures is important to help ensure the proper maintenance
and operation of the suspension system and component parts. Hendrickson recommends the
PRIMAAX ® EX • PRIMAAX ® heavy-duty rear suspension is inspected at pre-delivery, the first 1,000
miles of service and at the regular preventive maintenance intervals. Off-highway and severe ser-
vice operating conditions require more frequent inspections than on-highway service operation.
Following appropriate inspection procedures is important to help ensure the proper mainte-
nance and operation of the PRIMAAX EX • PRIMAAX suspension system and component parts
function to their highest efficiency.
Torque values shown in this publication apply only if Hendrickson supplied fasteners are used.
If non Hendrickson fasteners are used, follow the torque specification listed in the vehicle
manufacturer's service manual.

AREAS OF INSPECTION

The inspection must include the following components:
Air springs
• Air supply and fittings
• All fasteners
• Tire wear
Clamp group
Top pad
U-bolt locknuts
Signifies performance critical components.
HENDRICKSON RECOMMENDED
PREVENTIVE MAINTENANCE INTERVALS
PRE-DELIVERY INSPECTION
1. Visually inspect the suspension for proper assembly.
2. Verify the lateral alignment of the drive axles are within the vehicle manufacturer's toler-
ances, contact the vehicle manufacturer for the correct lateral alignment instructions.
3. Visually inspect the overall condition of the U-beam assembly (support beam assembly,
cross tube, and integrated end cap) for any damage.
4. DO NOT RE-TORQUE the integrated end cap (vehicles built AFTER April 2011), see Figure
6-1.
5. Check all other fasteners for proper torque with special attention to the following suspen-
sion connections:
QUIK-ALIGN fasteners, see Figure 6-2.
Torque rod to top pad fasteners, see Figure 6-2.
Clamp group fasteners (U-bolts), see Figure 6-3.
6. Verify the ride height is within specification. Ride height is measured from the bottom of the
frame rail to the centerline of the axle.
U-beam assembly
• Cross tube
• Support beam
• End cap (enhanced or
detachable)
• Frame hanger bracket
• Height control valve
16
QUIK-ALIGN ® connections
• S-cam support tube
bracket
• Shock absorbers
• Torque rods
– Transverse
– Longitudinal
17730-254