- remove the steering gear;
- remove the hydraulic pipes from the steering gear. Close both holes in the steering gear housing with plastic plugs;
Caution: To prevent dirt from entering the power steering hydraulic circuit, seal both distribution valve openings and both pipes with plastic plugs.
- unscrew the rack stop nut a few turns;
- unscrew the distribution valve mounting bolts;
- secure the steering gear in a vice with two elastic jaws;
Figure 7.18. Direction of rotation of the rod (1) to remove the control valve (2)
- use the key on the left to rotate the stem 1 of the distribution valve 2 (figure 7.18) clockwise until it stops against the toothed rack;
- after pressing against the toothed rack, continue to rotate the rod until the valve exits the steering gear housing. The spiral groove in the gear will allow the valve to be lifted;
Figure 7.19. Location of the distribution valve sealing ring on the steering gear housing: 1 - crankcase; 2 - sealing ring
- remove the sealing ring 2 from the steering gear housing 1 (figure 7.19) distribution valve.
To install the distribution valve:
- install a new sealing ring 2 on the steering gear housing;
Figure 7.20. Gear (1) of the toothed rack distribution valve
- apply a thin coat of TOTAL N3924/TOTAL N3945 grease to gear 1 (figure 7.20) toothed rack;
- install the control valve on the steering gear housing;
- using an inertia hammer, install the distribution valve into place through a mandrel;
- screw in the distribution valve mounting bolts and tighten them to a torque of 15 Nm;
Caution! Do not use the control valve mounting bolts to press the valve into place.
- install the O-rings on the hydraulic lines and install the lines in place;
- tighten the connecting nuts of the hydraulic pipes to the distribution valve with a torque of 8 N·m;
- adjust the rack stop.