Note:
Checking principle:
- The brake pressure is read from the diagonal circuit, after which the values for the front and rear wheels are compared. It is necessary to check both diagonal contours (front right-rear left and front left-rear right wheels).
- If the pressure for one or both rear wheels is not correct, replace the brake force compensator with a new one.
Note: Vehicle must be in running order (full tank, on-board tools and spare wheel in place, no passengers or luggage, driver at the wheel).
1. Connect two pressure gauges from the hydraulic brake test kit (Fre. 1085) to contour I (the first - to the front right wheel; the second - to the rear left wheel).
2. Start the engine.
3. Bleed the pressure gauges using a special tool by opening the valves on the pressure gauges.
4. Gradually depress the brake pedal until the pressure on the front wheel reaches 100 bar.
5. Read the pressure on the rear wheel.
6. Repeat procedure on circuit II (front left and rear right wheels).
7. In case of a significant discrepancy between the values obtained from the norm, replace the compensator with a new one.
Note: The brake pressure on the rear wheels must be between 37 and 43 bar. The difference in brake pressure between the two rear wheels must not exceed 4 bar.
8. After disconnecting the pressure gauges from the brake mechanisms, bleed the brake system.