150416_Training documents

ProSteering ®

Directional Pull Problem description:

Vehicle tends to pull to the right or left To keep the truck going straight a continually effort or force is required Q: Do you experience directional pull under braking or accelerating conditions?

A: Braking

Potential cause(s)

Verification or action Inspect braking surfaces for oil/grease or other contamination and the overall condition of surfaces

Result

Remedy

Adjust or replace brakes

Unequal braking force

Checklist: Verify alignment of steer axle and rear drive axles Verify wheel bearings are adjusted to original manufacturers guideline Air suspension adjust is consistent with the original manufacturers guideline Swap steer tires and look for mismatched belt tread Verify the vehicle is not overloaded A: Acceleration

Potential cause(s)

Verification or action Complete the original manufacturers gear imbalance test procedure Perform the power steering pump test as described in the manufacturers service manual

Result

Remedy

Investigate the next potential cause Replace the steering gear Call technical support Repair or replace the power steering pump

Pass

Unbalanced gear

Fail

Pass

Power steering pump

Fail

150416_TECHNICAL GUIDE 23