Remove, Install & Check Bearing Cover w/ Pitman Arm Shaft

Steering Gear with Adjusting Screw at Top

Removing, Installing and Checking Bearing Cover with Pitman Arm Shaft:




1 Steering Gear
12 Pitman Arm
16 Locking Ring
43 Piman Arm Shaft
51 Piman Arm Shaft/Bearing Cover
56 O-ring
58 O-ring
59 Self Locking Bolts

- Pay attention to "Important Notes Regarding Repair of Steering Gear"
- Remove steering gear from vehicle if not already done.
- For special tool information, Tools and Equipment

Removal:




1. Attach steering gear to the assembly support 140 589 00 59 00 with two bolts and clamp in vise.




2. Measure distance "a" between pitman arm (12) and pitman arm shaft/bearing cover (51) and note size "a".




1 Steering gear
12 Pitman arm

3. Take off locking ring (16). Unscrew nut (14a) and take off bolt (14).




4. Pull pitman arm (12) off pitman arm shaft, use puller 000 589 83 33 00, if necessary.




5. Turn steering gear into center position by unscrewing bolt (62) and screwing in center position inspection bolt 201 589 06 21 0O

NOTE: If the steering gear is not in the center position, the steering gear housing will be damaged on the inside when pressing out the pitman arm shaft together with bearing cover/pitman arm shaft.




Position steering gear with external centering (as of 1/90) to mark (arrows).




6. Unscrew self-locking bolts (59) for attaching pitman arm shaft/bearing cover (51).




7. Unscrew collar nut front adjusting screw, holding adjusting screw tight




8. With steering in center position, turn adjusting screw clockwise; this causes the pitman arm shaft (43) to be pressed out of the steering gear housing together with the bearing cover/pitman arm shaft (51).

Installation:




9. Turn steering worm so that the center tooth gap of the power piston (arrow) is positioned in the middle of the opening in the steering gear housing.




10. Replace O-rings. Introduce pitman arm shaft/bearing cover (51) together with pitman arm shaft into the steering gear housing so that the center tooth of the pitman arm shaft meshes into the middle tooth gap of the power piston. Ensure that the 0-rings are properly seated (arrow).
11. Turn pitman arm shaft/bearing cover (51) so that oil passage and bore are aligned with those of the steering gear.




12. Screw adjusting screw (45) into the steering gear housing far enough for it to make contact. Unscrew center position inspection bolt and fit screw plug with new seal (35-40 Nm).

NOTE: Only by screwing in the adjusting screw is it ensured that the pitman arm shaft/bearing cover rests against the steering gear housing.




13. Tighten pitman arm shaft/bearing cover (51) with NEW self-locking bolts (59), (30-35 Nm).




14. Check, adjust friction torque of steering gear. Checking and Adjusting Friction Torque of Steering Gear

NOTE: A slight pressure point must be felt when turning beyond the center position. The steering gear must move freely when the steering shaft is turned from lock to lock.




15. Screw collar nut onto the adjusting screw and tighten to 60-65 Nm, holding the adjusting screw tight.
16. Re-check friction torque.




17. Clean shaft spline on the pitman arm shaft and on the pitman arm (12). Both parts must be free of oil and grease. Coat shaft spline of pitman arm with Loctite 270. Then push pitman arm shaft to size "a" measured in step number 2 on to the pitman arm shaft in line with the cross nut.
18. Insert bolt (14). Replace nut (14a), 55 Nm.
19. Install new locking ring (16). Ensure it is correctly seated.
20. Detach steering gear from assembly support.