Sedan body
1. Raise the rear of the vehicle.
2. Remove the valve bracket from the lower control arm (see illustration).
3. Mark the position of the four hydraulic lines on the valve (see figure) and unscrew the nuts from the pipe, if possible using a spanner. Carefully disconnect the pipes from the valve.
4. Remove the two bolts securing the valve to the oil pan and then remove the valve from the vehicle.
Installation
5. After placing the valve on the floor tray, screw in the two mounting bolts and tighten them securely.
6. Connect the valve bracket to the lower control arm, install the lock bolt and tighten it securely.
7. Insert the brake pipes into the valve. Fit the nuts onto the pipe, being careful not to cut them, then tighten securely, preferably with a spanner.
Adjustment
9. Lower the vehicle and rock it several times to allow the suspension to return to normal operating condition.
10. Cut a piece of hose or tubing 16.3 mm long with an internal diameter of 6.35 mm (1/4 inch) and make a slit in the side of it (see picture).
9.10 The brake pressure control valve is adjusted by inserting a piece of rubber or plastic tubing between the upper nut of the control rod and the lever, then moving the adjusting sleeve so that it fits into the pocket of the lower support bracket (the car must be at normal height when performing this operation).
1. Valve bolt.
2. Set adjustment bolt.
3. Cut the tube to this length.
4. Adjusting sleeve.
11. Moving along the bottom rear of the vehicle, lower the valve adjustment screw (see figure).
12. Using a piece of pipe as an intermediate ring, install it on the upper end of the operating rod. If necessary, slide the adjusting sleeve up or down so that it rests on the support bracket pocket on the lower suspension arm. Tighten the adjusting sleeve set screw securely.
Station wagon body
13. Place a rag under the master cylinder and prepare caps or plastic plugs to cover the ends of the tubes after they are disconnected.
14. Loosen the tube nut (primary or secondary, depending on which valve is being removed) where it enters the pressure control valve, using a socket wrench if possible.
15. Unscrew the pressure control valve from the master cylinder (see figure). Close the hole in the master cylinder to avoid excessive fluid loss and contamination.
9.15. In station wagon bodies, the brake system pressure control valves are screwed into the master brake cylinder.
1. Right rear pressure control valve.
2. Secondary piston.
3. Left rear pressure control valve.
4. Main piston block.
16. Installation is carried out in the reverse order. Be sure to bleed the brakes as described in section 11.