4000,S L4-1781cc 1.8L SOHC (MG) (1985)
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Brake Proportioning/Combination Valve: Testing and Inspection
CHECKING OPERATION
Brake Pressure Regulator
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Depress brake pedal once firmly (car must be on ground).
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Release pedal suddenly and check that lever on pressure regulator moves.
NOTE: It is normal if small quantities of brake fluid escape through vent hole. If in doubt, perform pressure/leakage test under pressure before adjusting
regulator.
CHECKING PRESSURE
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Connect VAG 1310 or suitable gauge and bleed.
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Depress brake pedal until front axle pressure reads 100 bar (1450 psi), hold for 5 seconds.
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Rear pressure reading must not vary more than 10 bar (145 psi) within 5 seconds.
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If results cannot be obtained, replace brake pressure regulator.
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Remove pressure gauges.
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Bleed brakes.
