Question 1

How to replace the brake proportioning valve assembly on Toyota Corolla?

Accepted Answer

The brake proportioning valve assembly replacement requires use of Special Service Tool: 09023-00100 to disconnect the five brake tubes before removing the two body-mounting bolts. Installation of the new proportioning valve assembly must begin with tightening the bolts to 5.4 Nm (55 kgf-cm, 48 inch lbs.) torque. Next, reconnect the 5 brake tubes while using Special Service Tool: 09023-00100 to reach a torque of 15.2 Nm (155 kgf-cm, 11 ft. lbs.). The master cylinder will require fluid inserted into its reservoir followed by bleeding it with Special Service Tool: 09023-00100 and finally bleeding the brake line before checking the fluid level.

Question 2

How to service and repair a Brake Proportioning Valve on Toyota Tacoma?

Accepted Answer

The first step for servicing the Load Sensing Proportioning and By-Pass Valve (LSP & BV) requires disconnecting shackle No. 2 from its bracket through the removal of a nut followed by the cushion retainer and subsequent removal of two cushions and the collar. Special Service Tool: 09023-00100 enables disconnecting the brake lines from the valve body for removing the LSP & BV assembly. The service process on 2WD (except pre runner) starts with flexible hose bracket clip removal then continues by taking out the three valve bracket mounting bolts and spacer to release the LSP & BV assembly. When handling the LSP & BV assembly with flexible hose bracket on 4WD and pre runner variants you must detach the three valve bracket mounting bolts and spacer and flexible hose bracket mounting bolt before proceeding. The installation requires users to connect the LSP & BV assembly to the frame through three valve bracket mounting bolts alongside spacers for 2WD (except pre runner) or by using three valve bracket mounting bolts with spacer and flexible hose bracket mounting bolt for 4WD and pre runner with a torque setting of 29 Nm (300 kgf-cm, 22 ft. lbs.). Join the brake lines through the use of Special Service Tool: 09023-00100 and torques should be set to 15 Nm (155 kgf-cm, 11 ft. lbs.). Secure shackle No. 2 to shackle No. 1 by using two nuts and adjust the calibration dimension A before tightening the locking nut to 13 Nm (130 kgf-cm, 9 ft. lbs.). Secure shackle No. 2 by attaching its two cushions and collar along the shackle bracket and tighten the cushion retainer nut to 13 Nm (130 kgf-cm, 9 ft. lbs.). After setting the required rear axle load apply enough force to the load sensing spring until the valve piston glides smoothly into position while touching the spring steadily. Tighten the mounting nuts to 13 Nm. You must bleed the brake line after checking and readjusting LSP and BV fluid pressure.

Question 3

How to service and repair a Brake Proportioning Valve on Toyota Tundra?

Accepted Answer

The service procedure for the Load Sensing Proportioning and By-Pass Valve (LSP & BV) starts by disconnecting shackle No.2 from its bracket through bushing removal until shackle No.2 comes off along with taking out the 2 bushings and collar and finally the 2 bolts and shackle bracket. Use Special Service Tool: 09751-36011 to disconnect the 3 brake lines from the valve body. Then, remove the LSP & BV assembly after disconnecting its 2 valve bracket mounting bolts. The Blend Proportioning Valve requires three securing bolts to be removed after disconnecting the four brake lines when a torque of 29 Nm (296 kgf-cm, 21 ft. lbs.) has been achieved. Install the LSP & BV assembly by first placing its position and then securing it using the 2 valve bracket mounting bolts while torquing to 29 Nm (300 kgf-cm, 22 ft. lbs.). Specially designed tool 09751-36011 is used to connect the three brake lines where torque must be set to 15 Nm (155 kgf-cm, 11 ft. lbs.). Secure dimension A to 120 mm (4.72 inch) then fasten the lock nut to 13 Nm (130 kgf-cm, 9 ft. lbs.) afterward add the shackle bracket followed by 2 bolts secured at 29 Nm (300 kgf-cm, 22 ft. lbs.). Insert the shackle bracket by connecting its bushings with collar and shackle No.2 while tightening it to 13 Nm (130 kgf-cm, 9 ft. lbs.). Install the cushion retainer and its matching nut. Position the valve body by manually pulling down the load sensing spring which should move valve piston down smoothly until the piston lightly touches the spring. Tighten its mounting nuts to 13 Nm (130 kgf-cm, 9 ft. lbs.). Brake line bleeding must occur before checking and adjusting fluid pressure levels of both the LSP and BV.

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