Ranger 2WD V6-177 2.9L (1989)
Wheel Alignment - Measure the front wheel alignment. For out of specification vehicles, align to the "1990 Preferred Alignment Specifications" stated in
this article.
^
Spin the front tires to be sure that the front hubs are unlocked, if hubs are unlocked, the axle shaft will not rotate with the wheels.
^
Do not adjust wheel alignment to correct for brake pull if the vehicle does not have pull during non-brake applications.
^
Set the tire pressure to the specification on the certification label.
Compare the installed tires and wheels to the certification label. If the tires and wheels match, continue with the diagnostic procedure.
^
IF THE TIRES AND WHEELS DO NOT MATCH THE CERTIFICATION LABEL, compare tires and wheels to HPO (regular production option)
list and set tire pressure to the correct value.
^
IF THE TIRES AND WHEELS DO NOT MATCH CERTIFICATION LABEL OR RPO AVAILABILITY, swap known good tires and wheels (as
called for by the certification label or RPO list) for the purposes of evaluation only.
Drive vehicle after alignment is performed.
^
Vehicles which exceed the maximum average caster value shown above may result in shimmy concerns.
^
Vehicles operated below the minimum average caster value shown can result in wander and poor steering returnability concerns.
If the vehicle is not within these minimum and maximum average caster values, or if the vehicle has experienced any of these listed steering/handling
concerns, the average caster should be set in accordance with ride height/caster chart in the Shop Manual.
Diagnostic Procedure # 3 - Tires
1. Spin the front tires to be sure that the front hubs are unlocked. If the hubs are unlocked, the axle shaft will not rotate with the wheels.
2. Measure tire circumference of all four tires; put the two closest circumference tires on the rear axle. Tire pressure must be equal on all tires.
Diagnostic Procedure # 4 - Steering Gear Valve Off Center
Rotary Valve Centering Check:
To confirm that you are looking at a steering gear valve concern, lift the front wheels off the ground.
