Mechanical Brake System - Base (Service Information): Valve-Proportioning: Installation

Fig 1: Proportioning Valves

Courtesy of DAIMLERCHRYSLER CORP.

1 - PROPORTIONING VALVE IN SECONDARY PORT

2 - MASTER CYLINDER

3 - PROPORTIONING VALVE IN PRIMARY PORT

1. Lubricate the O-ring on the proportioning valve. If not new, replace the O-ring on the proportioning valve. 
2. Install the proportioning valve (1 or 3) in its master cylinder (2) port. Tighten the proportioning valve to 27 N.m (20 ft. lbs.).
   Fig 2: Locating Proportioning Valve And Brake Tubes At Master Cylinder

   Courtesy of DAIMLERCHRYSLER CORP.

   1 - RIGHT FRONT BRAKE TUBE

   2 - PROPORTIONING VALVES

   3 - LEFT FRONT BRAKE TUBE

   4 - LEFT REAR BRAKE TUBE

   5 - RIGHT REAR BRAKE TUBE

3. Install the brake tube (4 or 5) to the proportioning valve. Tighten the tube nut to 17 N.m (145 in. lbs.).
   Fig 3: Brake Pedal Holder

   Courtesy of DAIMLERCHRYSLER CORP.
4. Remove the brake pedal holder.
5. Bleed the affected brake line. (Refer to BRAKES - STANDARD PROCEDURE) 
6. Road test the vehicle to ensure proper operation of the brakes.