brakes

vvthredders · Unread post by **vvthredders** » 07 Sep 2003, 00:56

please can someone explain why my rear brake calipers on a 1995 xantia vsxtd appear to have no power. i have bleed them but the fluid appears to be under no pressure at all

alexx · Unread post by **alexx** » 07 Sep 2003, 01:14

Almost impossible, if rear wheels are on the ground and rear of the car on the correct height, because rear suspension is source of pressure for rear brake circuit.

AndersDK · Unread post by **AndersDK** » 07 Sep 2003, 01:42

To bleed rear brakes - simply have suspension set to highest height.

Dave Burns · Unread post by **Dave Burns** » 07 Sep 2003, 03:06

If you have the back end jacked up and wheels off the ground with the ride height set to normal, there will be no pressure in the rear brake circuit, you must as Anders says have the suspension on the high setting if the rear wheels are off the ground.
The reason is as Alexx has said, rear brakes get their pressure feed from the rear suspension circuit, this enables the rear brakes to be load sensetive.
Dave

alexx · Unread post by **alexx** » 07 Sep 2003, 03:28

Exactly. If you have the back end jacked up, rear suspension will fully extend (to rebound-stops). Height corrector will 'think' that the car is too high and release all the pressure from rear suspension, trying to lower the rear end to correct height.