Anyone Understand Range Rover P38 Brakes Properly?

[V8 Disco]

Hi - trying to fault find the brakes on my P38. The system is complex, using a pump and pressure vessel to pressurise the system rather than a vaccum servo and a combined traction control/ABS and brake modulator unit.

Problem is that I just cannot get all the air out when bleeding. System is fine for about 2 weeks after bleeding, then I get a knocking from the brake modulator where air has appeared again. When left standing on the drive for a couple of days, the air must move, as the knocking dissappears again.

I'm tearing what little is left of my hair out over this. My specialist garage is definitely bleeding the system per Land Rover instructions to the letter. Anyone able to help?

[paintman]

Be better on one of the Land Rover forums.
This of any help? http://www.rangerovers.net/repairdetails/braketc/a...

Edited by paintman on Saturday 31st October 09:29