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Volkswagen Workshop Service and Repair Manuals

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Bleeding brake system and changing brake fluid, vehicles without ABS > < Load-dependent brake pressure regulator setting values

Golf Mk2

Checking and adjusting brake pressure regulator, vehicles with ABS
Checking and adjusting brake pressure regulator, vehicles with ABS
  Note
The brake pressure regulator is adjusted with the vehicle unladen. "Unladen" means: the weight of the vehicle ready for the road (full tank, spare wheel, vehicle tools, vehicle jack, driver in vehicle).
–  Switch ignition off and dissipate pressure in accumulator (actuate brake pedal approx. 20 times until pedal pressure increases perceptibly).
–  Raise vehicle.
   
–  Connect pressure gauge upstream of brake pressure regulator and pressure gauge to rear brake caliper/wheel brake cylinder.
a - Brake hose between hydraulic unit and T-piece upstream of brake pressure regulator (with additional T-piece -b- already installed in illustration).
b - Additional T-piece (part No. 803 611 755)
c - Brake hose (200 mm long), produced internally - install brake hose -c- between additional T-piece -b- and T-piece upstream of brake pressure regulator.
d - Pressure gauge connection to brake caliper/wheel brake cylinder.
  Note
t  In vehicles without T-piece upstream of brake pressure regulator, just one brake hose -a- leads from hydraulic unit directly into brake pressure regulator.
t  Unscrew brake hose -a- from brake pressure regulator, connect additional T-piece -b- and brake hose -c- between brake hose -a- and brake pressure regulator.
  N47-10043
t  Connect pressure gauge connection -d- to rear brake caliper/wheel brake cylinder.
–  Bleed both pressure gauges.
–  Lower vehicle and bounce the rear of the vehicle several times.
–  Depress brake pedal and measure pressures.
–  Compare figures attained with specifications → Chapter and if necessary adjust.
Adjusting regulator.
–  Rear axle test pressure too high: - Relieve regulator spring.
–  Rear axle test pressure too low: - Tension regulator spring.
–  Remove pressure gauges and bleed rear brake system → Chapter.
  N47-10043

Bleeding brake system and changing brake fluid, vehicles without ABS > < Load-dependent brake pressure regulator setting values