Load Compensator: Testing and Inspection

Brake pressure regulator, checking and adjusting

Special tools and equipment required





^ VAG 1310 Brake pressure gauge





The brake pressure regulator is mounted on a bracket and mounted 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 standing on its wheels).
- 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, tool kit and jack in place

Checking
^ Lift vehicle and connect pressure gauges to left front and right rear brake calipers.
^ Bleed both gauges.
^ Lower 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 if necessary adjust.

Specifications for load dependent brake pressure regulator
Rear disc brakes
Front axle 70 bar (1015 psi)
Front axle 100 bar (1450 psi)
Rear axle 36 - 42 bar (522 - 609 psi)
Rear axle 49 - 55 bar (710 - 798 psi)