150416_Training documents

ProSteering ®

Hard Steering Problem description: The truck is difficult to steer. Excessive effort is required to turn the wheels Power assist is lost or limited Checklist: Verify correct level of power steering fluid in the reservoir Verify tire pressure values are correct Verify fifth wheel properly greased Confirm that vehicle is not overloaded Q: Does the loss of assist or increased effort occur on one or both directions?

A: One direction only

Potential cause(s)

Verification or action

Result

Remedy

Bleeding the power steering system corrected the loss of assist in one direction The gear has an internal leak. Replace the steering gear

Air was found in the power steering system

Bleed the power steering system following the manufacturers service procedure

Air is trapped in power steering system

Air is not present in the system and the problem still exists

150416_TECHNICAL GUIDE 25