OEM 2003 Toyota Tacoma Brake Proportioning Valve

2003 Toyota Tacoma Brake Proportioning Valve Parts Q&A

• Q: How to service and repair a Brake Proportioning Valve on 2003 Toyota Tacoma?

  A: 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.