Specifications

Appendix 17730–248
A-98
AIRTEK/SOFTEK
TROUBLESHOOTING GUIDE
CONDITION POSSIBLE CAUSE CORRECTION
Worn or damaged kingpins and
kingpin bushings
Dirt in system– contaminated lubricant
Polish and inspect kingpin, replace bushing
and seals, then follow specified lubrication
procedures
Incorrect lubricant Lubricate axle with specified lubricant
Axle not lubricated at scheduled frequency Lubricant axle at scheduled frequency
Incorrect lubrication procedures Use correct lubrication procedures
Lubrication interval not compatible with
operating conditions
Change lubrication interval to match
operating conditions
Worn or missing seals Replace worn or missing seals
Vibration or shimmy of front axle
during operation
Caster out of specification
Set proper ride height then adjust caster to
specification
Wheels and/or tires out of balance Balance or replace wheels and/or tires
Worn shock absorbers Replace shock absorbers
Worn thrust washers (if equipped) and rear
hanger clamps
Replace thrust washers (if equipped) and
rear hanger clamps
Broken engine mount Replace engine mount
Wheel bearing adjustment
Adjust wheel bearing to the vehicle
manufacturers specifications.
Excessive wear on tires or uneven
tire tread wear
Tires have incorrect air pressure
Adjust tire pressure to manufacturer’s
specification.
Tires out of balance Balance or replace tires
Incorrect tandem axle alignment Align tandem axles
Incorrect toe setting Adjust toe-in to manufacturer’s specification
Incorrect steering arm geometry Repair steering system as necessary
Worn kingpin bushings Replace kingpin bushings
Excessive wheel bearing end play
Check specified wheel nut torque, replace
worn or damaged wheel bearings
Wheel bearing adjustment
Adjust wheel bearing to the vehicle
manufacturers specifications.
Vehicle is hard to steer
Low pressure in the power steering system Repair power steering system
Steering linkage needs lubrication Lubricate steering linkage
Steering knuckles are binding Check vertical clearance
Incorrect steering ar geometry Repair steering system as necessary
Caster out of specification
Set proper ride height then adjust caster to
specification
Tie rod ends hard to move Replace tie rod ends
Worn thrust bearing Replace thrust bearing
Steering gear box internal problem
Perform steering gear trouble shooting
procedures per steering gear manufacturing
guidelines.
L
140
1
APPENDIX
SERVICE MANUAL