Fixing all your keys
AO Silver Member
Join Date: Mar 2001
Location: United Kingdom
County: Tyne and Wear
Re: Air in brake hydraulic system
If you have got air into the abs part of the system then you have a bit of a problem. I don`t think this can self-bleed and you need to follow quite a strict regime to get rid of it. I can only tell you the 155 routine but it won`t be that much different.
It may be more likely that you have air in the piston.
The following proceedure is the 155 recovery bleed for air in the piston, or previous incorrect order of bleeding, followed by the proceedure for abs flush-through and a standard bleed. I doubt its different for the 156 but the manual doesn`t seem to tell you :/
1) o/s/r, n/s/f, o/s/f, n/s/r - you must repeat this 5 times!
2) n/s/f, o/s/f, n/s/r. o/s/r