Suburban 3/4 Ton 4WD V8-305 5.0L (1986)
Steering Gear: Testing and Inspection
Excessive Wheel Kickback or Loose Steering
1.
Lash in steering linkage.
2.
Air in system.
3.
Excessive lash between pitman shaft sector and rack piston.
4.
Loose thrust bearing adjustment.
5.
Ball nut and worm preload.
6.
Steering gear loose on frame.
7.
Steering linkage worn.
8.
Improper front wheel bearing adjustment.
9.
Poppet valve worn.
External Oil Leaks
1.
Loose hose connections.
2.
Damaged hose.
3.
Side cover O-ring seal.
4.
Pitman shaft seals.
5.
Housing end plug seal.
6.
Adjuster plug seals.
7.
Torsion bar seal.
8.
Defective housing.
Hard Steering
1.
Frozen steering shaft bearings.
2.
Lower coupling flange rubbing against adjuster.
3.
Steering adjustment tight.
4.
Low oil level in pump.
5.
Loose pump belt.
6.
Insufficient oil pressure.
7.
Improper tire inflation.
8.
Flow control valve sticking.
9.
Pump leaking internally.
10.
Steering gear leaking internally.
Hard Steering When Parking
1.
Loose pump belt.
2.
Low oil level in reservoir.
3.
Lack of lubrication in linkage or front suspension.
4.
Tires not properly inflated.
5.
Insufficient oil pressure.
6.
Low oil pressure due to restriction in hoses.
7.
Low oil pressure due to worn piston ring or scored housing bore.
8.
Pressure loss due to leakage at valve rings, valve body-to-worm seal or rack piston end plug seal.
9.
Pressure loss due to loose fit of spool in valve body or leaky valve body.
Momentary Increase In Effort When Turning Wheel Fast
1.
Low oil level in pump.
2.
Pump belt slipping.
3.
High internal leakage.
4.
Insufficient pump pressure.
No Effort Required to Turn
1.
Broken torsion bar.
Poor Return of Steering
