PRIMAAX
®
EX / PRIMAAX
®
for International Truck Vehicles
Troubleshooting Guide
74
17730-283
SECTION 10
Troubleshooting Guide
PRIMAAX EX / PRIMAAX TROUBLESHOOTING GUIDE
CONDITION
POSSIBLE CAUSE
CORRECTION
Suspension has
harsh or bumpy
ride
Air spring not infl ated to
specifi 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 infl ation
pressure
Correct tire pressure per vehicle manufacturer and tire manufacturer specifi cations.
Incorrect alignment
Correct the alignment. Refer to the Alignment & Adjustments Section.
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 specifi cations.
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.
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 vehicle alignment. Adjust if necessary.
Check frame hanger for wear around QUIK-ALIGN plates and replace if necessary.
Loose U-bolts
Tighten U-bolts to specifi cations, see Preventive Maintenance Section.
Loose end caps (if equipped)
Inspect end caps and the support beam to cross tube connection for damage.
Repair as necessary, re-torque end cap to specifi cation, see Torque Specifi cations
Section.
Worn bushings
Replace 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.
Pro Gear and Transmission • 906 W. Gore St. Orlando, FL 32805 • 1 (877) 776-4600 / (407) 872-1901 • [email protected]