Cause / 709

1. Vehicle off center loaded. 2. Guide assembly is dry. 3. Air in system. 4. Bearing wear. 5. Jacks not plumb.

Repair / 709

1. Make sure spotting dish is located properly and is being used. 2. Grease guide assembly. 3. Bleed cylinders. 4. Replace bearings. 5. Make sure jacks are on centers.