Contents: Disassembly ⤓ Assembly ⤓
Disassembly
To disassemble the steering gear, perform the following operations sequentially.
Fig. 13.16. Steering mechanism: a - places of lubrication application; 1 – protective cover; 2 – steering rod end; 3 – lock nut (42 Nm); 4 – steering gear assembly
1. Remove the steering rod end 2 (Fig. 13.16). To do this, first loosen the lock nut 3 of the end, then unscrew the end from the steering rod.
2. Loosen the clamps and remove the protective covers 1.
Assembly
Assembly is carried out in the reverse order of removal, taking into account the following.
1. Adjust the total torque required to turn the steering gear pinion by securing the steering gear in a vice.
Caution! When installing the steering gear in a vice, clamp it only at the mounting points. If you clamp the steering gear in other places, you can deform or damage the steering gear housing.
2. Set the rack to the central position. Tighten the rack stop cover to a torque of 15 N·m.
Fig. 13.14. Using the wrench (1) to check the total torque required to turn the steering gear pinion
3. In the neutral position, turn the gear clockwise with a special key by one revolution in 4–6 s (see Fig. 13.14). Unscrew the rack stop cover by 30–60° and adjust the turning moment to the nominal value.
4. To check the total torque that must be applied to turn the pinion gear, use a special key to rotate the steering gear pinion within one revolution for 4–6 s (Fig. 13.14). The nominal value is 0.6–1.3 N·m (deviation – 0.4 N·m).
Attention! When adjusting, try to set the upper limit of the nominal value. Make sure there are no knocks or jams when moving the rack.
Attention! If adjustment is not possible within the specified gear rotation angle, check or replace the stop parts and the rack stop cover.
5. After completing the adjustment, tighten the rack stop cover lock nut.
6. Fill the inner cavity of the protective cover with universal grease.
7. Lubricate the sealing edge of the protective cover with sealant ЗМ ATD No.8661.
Fig. 13.17. Using the special tool (1) to install the protective cover on the ball joint pin of the tie rod end and the place (a) where the grease is applied
8. Using a special tool, install the protective cover on the ball joint pin of the steering rod end (Fig. 13.17).
Fig. 13.18. Control dimension for installation of left and right steering rod ends: A = 184.5 mm; 1 – groove for installing the edge of the corrugated cover; 2 – lock nut
9. Tighten the left and right tie rod ends to the size shown in Fig. 13.18 and tighten the lock nuts.