DESCRIPTION
Do not disassemble the proportioning valve. The proportioning valve makes the ideal distribution of fluid pressure to the front and rear brakes to prevent the brakes from skidding in the event of rear wheel lock up and to obtain a higher brake efficiency within the range of service brake application.
Scheme 4
Scheme 5
- Remove the front brake lines (B) and rear brake lines (C) from the master cylinder (A).
- Connect two pressure gauges (D); one to the output valve of the front (B) and rear (C) brake. NOTE: Be sure to bleed the system after connecting the pressure gauges.
- With the brake applied, measure the front pressure and the rear pressure. If the measured pressures are within the specified range as illustrated, the proportioning valve is good.
- Reconnect the brake lines in their original positions and bleed the system.
Note. The table in the following illustration, shows characteristics of the proportioning valve as the pressure increases.
Scheme 6
Scheme 7
Scheme 8
GENERAL INFORMATION
| CAUTION | Frequent inhalation of brake pad dust, regardless of material composition, could be hazardous to your health. |
- Avoid breathing dust particles.
- Never use an air hose or brush to clean brake assemblies.
Remove, disassemble, inspect, reassemble, and install the caliper and note these items
- Do not spill brake fluid on the vehicle; it may damage the paint; if brake fluid gets on the paint, wash it off immediately with water.
- To prevent dripping, cover disconnected hose joints with rags or shop towels.
- Clean all parts in brake fluid and air dry; blow out all passages with compressed air.
- Before reassembling, check that all parts are free of dirt and other foreign particles.
- Replace parts with new ones as specified in the illustration.
- Make sure no dirt or other foreign matter gets into the brake fluid.
- Make sure no grease or oil gets on the brake discs or pads.
- When reusing pads, always reinstall them in their original positions to prevent loss of braking efficiency.
- Do not reuse drained brake fluid.
- Always use Genuine DOT 3 or DOT 4 brake fluid. Non Genuine DOT 3 or DOT 4 brake fluid can cause corrosion and shorten the life of the system.
- Coat the piston, piston seal groove, and caliper bore with clean brake fluid.
- Replace all rubber parts with new ones.
- After installing the caliper, check the brake hose and line for leaks, interference, and twisting.