Load Compensator: Testing and Inspection

Brake pressure regulator, checking and adjusting

Special tools and equipment





^ VAG 1310 A Brake pressure gauge





The brake pressure regulator is mounted on a bracket and attached to the rear axle. The regulator is controlled from the rear axle by a spring.

Checking function
^ Depress brake pedal firmly once and release quickly (vehicle on ground).
- Brake pressure regulator must move

Checking and adjusting
Requirements
^ vehicle emptied of all cargo and passengers
^ driver (approximately 75 kg (165 lbs.) in driver's seat
^ full fuel tank
^ full windshield washer / headlight washer reservoir
^ spare tire in place

^ Lift vehicle and connect pressure gauges to left front and right rear calipers.
^ Bleed both gauges.
^ Lower vehicle and bounce rear of vehicle several times.
^ Depress brake pedal to obtain specified pressure at front axle, then read pressure at rear axle.
^ Compare reading with specifications and adjust if necessary.

Specifications for load dependent brake pressure regulator





Brake pressure regulator, adjusting
Pressure test result for rear axle too high:
^ Release tension on regulator spring.

Pressure test result for rear axle too low:
^ Increase tension on regulator spring.
^ Read pressure and if necessary, readjust.
^ Remove pressure gauges and bleed brake system.

Note: Do not adjust with the brake pedal depressed. Use the following work sequence:

^ Read pressure
^ Release brake pedal.
^ Adjust spring.
^ Depress brake pedal again.