Bleeding Hydraulics on XM 2.1td(mark 1)with ABS

robbocop33 · Post by **robbocop33** » 06 Dec 2005, 09:49

Hi,i want to bleed the whole system after i fit a new accumulator sphere today.Can i bleed it all from the pressure release screw at the front or can i bleed all the brakes through the bleed nipples on all the calipers as well.Also does the ABS block come into play here at all when bleeding the brakes?I've bled brakes on normal cars hundreds of times before i just want to be sure i do this right.

miked · Post by **miked** » 06 Dec 2005, 11:08

Yes you bleed them using the nipples on the calipers, but there is no need to do any foot down-tighten bleed screw- foot up-slacken-down etc like you do with a normal car. Just stick a foot (or a brick) on the brake pedal, slacken the bleed screw, wait for no more air, tighten, job done. This is how I once did a Xantia without ABS anyway.

jeremy · Post by **jeremy** » 06 Dec 2005, 11:47

No need to bleed anything on a BX if the accumulator is changed. Pressure relief screw is already slackened, fit sphere, start engine and wait while LHM is pumped back to the reservoir and let it run for 30 secs or so to clear bubbles and ensure pump is primed. Tighten relief screw - job done. Bit of Citrpoebics won't hurt.

I don't see why it isn't the same on an XM.

NiSk · Post by **NiSk** » 08 Dec 2005, 16:37

It is the same on the XM - but shifting the LHM in the brake lines after 12 years isn't such a bad idea anyway. The ABS has no effect unless the car is rolling at more than 3 kph.

//NiSk