Brake Pressure Regulator - Checking/Adjusting
Group: 47Number: 93-01
Date: May 15, 1993
Subject:
Brake pressure regulator, checking/adjusting
Model(s):
Golf III / GTI / Jetta III from 1993 m.y.
This information will replace the existing information in the Golf III/GTI/Jetta Repair Manual - Suspension, Wheels, Brakes, Steering, at the next reprinting.
Brake pressure regulator test pressures are now included for vehicles with rear disc brakes.
Brake pressure regulator, Checking/Adjusting
Brake Pressure Regulator:
The brake pressure regulator is mounted on a bracket and operated by a spring attached to the rear axle.
Checking
- Depress brake pedal firmly once and release quickly (vehicle on ground)
^ Pressure regulator lever must move
Checking/adjusting
Check the regulator pressure with the vehicle emptied of cargo and occupants but with a full tank of fuel and a spare tire.
Brake Pressure Gauges:
- Raise vehicle and connect pressure gauges to left front caliper and right rear brake caliper/wheel cylinder
- Bleed both gauges
- Lower vehicle and bounce rear of car several times
- Depress brake pedal to obtain specified pressure at front axle and read measured pressure at rear axle:
CAUTION
DO NOT adjust pressure regulator with brake pedal depressed.
- Release brake pedal
- Adjust regulator spring tension
^ If test pressure is too high: decrease spring tension
^ If test pressure is too low: increase spring tension
- Recheck regulator pressures and readjust if necessary
- Disconnect pressure gauges and bleed brakes