Hendrickson PRIMAAX EX - Preventive Maintenance; Areas of Inspection; Maintenance Intervals

PRIMAAX
®
EX / PRIMAAX
®
for Volvo Vehicles
Preventive Maintenance 16 17730-254
SECTION 6
Preventive Maintenance
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.
NOTE 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:
➤ 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.
➤ Air springs
• Air supply and fittings
• All fasteners
• Tire wear
➤ Clamp group
➤ Top pad
➤ U-bolt locknuts
➤ U-beam assembly
• Cross tube
• Support beam
• End cap (enhanced or
detachable)
• Frame hanger bracket
• Height control valve
➤ QUIK-ALIGN
®
connections
• S-cam support tube
bracket
• Shock absorbers
• Torque rods
– Transverse
– Longitudinal