Brake Proportioning/Combination Valve: Service and Repair

LSPV Assembly (If Equipped) Removal and Installation

Removal
1. Clean around reservoir cap and take out fluid with syringe or such.
2. Hoist vehicle.





3. Disconnect brake pipes (2) from LSPV assembly (1).





4. Remove LSPV assembly (1) with spring (2) from vehicle body.
5. Remove spring (2) from lever (5).

CAUTION: LSPV assembly must not be disassembled. Replace with new one if defective.

Installation

CAUTION: LSPV assembly must not be disassembled. Replace with new one if defective. Install by reversing removal procedure, noting the following.





1. Apply multipurpose grease "A" to upper and lower joint of coil spring.





2. Torque each bolt (2) and nut (1) to specification as indicated respectively in the figure.
Tightening torque
LSPV spring nut (a): 23 Nm (2.3 kgf-m, 17.0 ft. lbs.)
LSPV mounting bolt (a): 23 Nm (2.3 kgf-m, 17.0 ft. lbs.)
Brake pipe flare nut (b): 16 Nm (1.6 kgf-m, 11.5 ft. lbs.)
Air bleeding plug for LSPV (c): 7.5 Nm (0.75 kgf-m, 5.5 ft. lbs.)
3. Upon completion of installation, fill reservoir tank with specified fluid and bleed air from brake system.

NOTE: Make sure to bleed air from LSPV bleeder without failure.

4. After bleeding air, check that LSPV is installed properly.

Inspection and Adjustment





Confirm the following before inspection and adjustment.
^ Fuel tank is filled with fuel fully.
^ Vehicle is equipped with spare tire, tools, jack and jack handle.
^ Vehicle is free from any other load.

With vehicle in conditions:
1. Place it on level floor.
2. Push up LSPV lever with finger till it stops and measure length of coil spring "L" as it is pulled.
3. Spring length "L" should be the value specified.
Spring length (between spring ends)
"L": 125 mm (4.92 inch)





4. If it isn't, adjust it to specification by changing stay (2) positions as shown in the figure. After adjustment, tighten bolt (1) to specified torque.
Tightening torque
LSPV stay bolt (a): 23 Nm (2.3 kgf-m, 17.0 ft. lbs.)

NOTE: Check to make sure that LSPV body and brake pipe joints are free from fluid leakage. Replace defective parts, if any.