Rack Yoke Preload
NOTE:
This is not a normal service adjustment. It is only required when pinion shaft and valve assembly is removed. Steering gear unit must be removed from vehicle. See STEERING GEAR
under REMOVAL & INSTALLATION.
PINION SHAFT ROTATION TORQUE
| Application | INCH Lbs. (N.m) |
|---|---|
| Standard Rack & Pinion | 7-18 (.8-2.0) |
| Handling Rack & Pinion | 7-24 (.8-2.7) |
- Clean exterior of steering gear. Install 2 long bolts and washers through bushings and attach unit to Bench Mounted Holding Fixture (T57L-500-B).
- DO NOT remove external pressure lines unless necessary. If lines are removed, NEW lines must be installed. Drain fluid by rotating pinion shaft lock to lock twice using Pinion Shaft Torque Adapter (T74P-3504-R). Cover ports on valve housing with a cloth while draining gear.
- Insert an INCH-lb. torque wrench in pinion shaft torque adapter. Position adapter and wrench on pinion shaft splines. Rotate pinion shaft in both directions. Note required pinion shaft rotation torque. See PINION SHAFT ROTATION TORQUE . If rotation torque is not as specified, adjust rack yoke preload by loosening yoke lock nut using Pinion Housing Yoke Lock Nut Wrench (T78P-3504-H). See Fig 1 .
- Loosen yoke plug with a 3/4" socket. Clean yoke plug threads. With rack centered, tighten yoke plug to 45-50 INCH lbs. (5.1-5.7 N.m). Loosen yoke plug approximately 1/8 turn until torque is as specified. See PINION SHAFT ROTATION TORQUE .
- Position Pinion Housing Yoke Lock Nut Wrench (T78P-3504-H) on yoke plug lock nut. Hold yoke plug and tighten lock nut to 44-66 ft. lbs. (60-89 N.m). Ensure yoke plug does not move, or preload will be incorrect. After tightening lock nut, recheck pinion shaft torque.