Beetle L4-1.9L DSL Turbo (ALH) (1998)
Brake Pressure Regulator: Testing and Inspection
Brake Pressure Regulator, Checking And Adjusting
Special Tools And Equipment
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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
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Depress brake pedal firmly once and release quickly (vehicle on ground).
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Brake pressure regulator must move
Checking And Adjusting
Requirements
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vehicle emptied of all cargo and passengers
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driver (approx. 75 kg [165 lb.)) in driver's seat
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full fuel tank
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full windshield washer / headlight washer reservoir
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spare tire in place
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Lift vehicle and connect pressure gauges to left front and right rear calipers.
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Bleed both gauges.
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Lower vehicle and bounce rear of vehicle several times.
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Depress brake pedal to obtain specified pressure at front axle, then read pressure at rear axle.
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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:
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Release tension on regulator spring.
Pressure test result for rear axle too low:
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Increase tension on regulator spring.
Note:
Do not adjust with the brake pedal depressed. Use the following work sequence: