New Beetle L4-2.0L (AVH) (2005)
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Relieve pressure on regulator spring.
Test pressure at rear axle too low:
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Tension regulator spring.
Do not adjust when brake pedal is depressed, therefore observe the following repair sequence:
Read values:
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Release pedal.
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Adjust spring.
Press pedal again:
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Read values and adjust if necessary.
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Remove pressure gauge, bleed brake system.