Brake issue (help me) 960 1990 ABS!

Ben240s

Volvo 1990 960 I have brake pressure the master is working pedal is moving , but can't bleed the brakes up there not working. Cracked the bleed nipple on the master and he shoot out like a teenie with a meat pie.

But can't get any of the calipers at the rear to bleed no fluid coming out. (Fronts I haven't tried)

Can anyone tell me where I can start I haven't done abs so not sure what to look at or where to start

ramrod

Replace all the brake lines.

They have imploded internally. Collapsed.

jamesinc

Good chance the hoses are indeed to blame but it's a bit sus that it's both sides. Maybe disconnect the calliper and see if you get any flow direct from the hose? You can also try removing the bleed nipple entirely to see if it is clogged, or if the channel behind it in the calliper is clogged.

Ben240s

jamesinc it's all 4 not just the rear none are working. I'll take the rubber hoses off from the calipers and try . Iv taken out bleed nipples same nothing but dryness

jamesinc

Oh okay that's wild. In that case I think it is worth going through the junctions between the master and the hoses to see where the blockage or loss of pressure starts.

Major Ledfoot

This online service manual might give you a few hints.
It's for a 1992 960 with B6304S, but AFAIK the ABS system and brake service procedure didn't change much over the years.

https://charm.li/Volvo/1992/960%20L6-3.0L%20VIN%2095%20B6304F/Repair%20and%20Diagnosis/

Ben240s

Major Ledfoot thank you that is very helpful

Inski

It will be the brake lines, the late model abs stuff seem to block very easily.
Just go to the hydraulic shop and get a set made or i have set of braided ones if you get stuck.

Ben240s

Inski thanks mate I'll check them tonight and let you know how I go