Brake Proportioning/Combination Valve: Service and Repair

A: INSPECTION
1. Install the oil pressure gauges to measure the master cylinder fluid pressure (front wheel brake fluid pressure) and rear wheel cylinder fluid pressure.
2. Bleed air from the oil pressure gauge.
3. Check the master cylinder fluid pressure and rear wheel cylinder fluid pressure.
- Split point 3,678 kPa (533 psi).

B: REMOVAL
1. Remove brake pipe from proportioning valve at four places.
2. Remove proportioning valve from its bracket.

CAUTION: Do not disassemble or adjust the proportioning valve. (The proportioning valve must be replaced as an assembly.)

C: INSTALLATION
1. Install proportioning valve to bracket.
2. Connect brake pipes correctly to proportioning valve.
3. Bleed air, then check each joint of brake pipe for oil leaks.

Tightening torque:
Proportioning valve to brake pipe flare nut: 15 +3 / -2 Nm (10.8 +2.2 / -1.4 ft. lbs.)
Proportioning valve to bracket: 18 ± 5 Nm (13.0 ± 3.6 ft. lbs.)