Hendrickson PRIMAAX EX - Troubleshooting Guide

PRIMAAX
®
EX / PRIMAAX
®
for Volvo Vehicles
Troubleshooting Guide 58 17730-254
SECTION 10
Troubleshooting Guide
PRIMAAX EX • PRIMAAX TROUBLESHOOTING GUIDE
CONDITION POSSIBLE CAUSE CORRECTION
Suspension has
harsh or bumpy
ride
Air spring not in ated to
speci cation or damaged
Repair air system and check ride height. See Ride Height Adjustment in the Alignment
& Adjustments Section.
Ride height set incorrectly
Adjust ride height to proper setting. See Ride Height Adjustment in the Alignment &
Adjustments Section.
Suspension is overloaded Redistribute load to correct weight.
Broken support beam Replace broken support beam assembly.
Irregular tire wear
Incorrect tire in ation
pressure
Correct tire pressure per vehicle manufacturer and tire manufacturer speci cations.
Worn QUIK-ALIGN bushing Replace QUIK-ALIGN bushing.
Loose QUIK-ALIGN
attachment
Replace QUIK-ALIGN connection, and check vehicle alignment. Adjust if necessary.
Check frame hanger for wear around QUIK-ALIGN plates and replace if necessary.
Worn torque rod bushings Replace torque rod bushings as necessary.
Excessive driveline
vibration
Incorrect pinion angle(s) Adjust pinion angle(s), refer to the Vehicle Manufacturer for speci cations.
Ride height set incorrectly
Adjust ride height to proper setting. See Ride Height Adjustment in the Alignment &
Adjustments Section.
Broken support beam Replace support beam assembly.
Suspension is
noisy
Loose QUIK-ALIGN
attachment
Replace QUIK-ALIGN connection, and check suspension alignment, adjust if necessary.
Loose U-bolts Tighten U-bolts to speci cations, see Preventive Maintenance Section.
Loose end caps
Inspect end caps and the support beam to cross tube connection for damage. Repair
as necessary, re-torque end cap to speci cation, see Torque Speci cations Section.
Worn torque rod bushings Replace torque rod bushings as necessary.
Vehicle bouncing
excessively
Damaged or leaking shock
absorber
Replace shock absorber.
Ride height set incorrectly
Adjust ride height to proper setting. See Ride Height Adjustment in the Alignment &
Adjustments Section.
Vehicle leaning
Air spring not in ated to
speci cation or damaged
Repair air system and check ride height. See Ride Height Adjustment in the Alignment
& Adjustments Section.
Load not centered Redistribute the load.
Frame twisted Straighten the frame per vehicle manufacturer guidelines.
Broken support beam Replace broken support beam assembly.
Axle housing bent or broken Replace axle housing per vehicle manufacturer guidelines and align vehicle.
Loose U-bolts Tighten U-bolts to speci cations, see Preventive Maintenance Section.
Front suspension Inspect and repair front suspension.