Brake hangs on a vw T4- after workshop changed front brake lines

[mawrick]

Not really a VR6 Q, but thought I'd ask here anyway as O hope maybe someone migght have a clue/tip on what might causing this.

I have a 2.5 tdi vw Transporter (2002), no ABS. There was no problem until I took it into a garage to change the front brake lines (due to no time, and had to get it aprooved for 2 new years, which it did), but when I drove it back home the brakes was hanging causingbrakes to go warm etc. I did some troubleshooting at it seem that it would release after it sat for a while, it also seem to release once I removed the vacuum line to the brake booster, so I cahnged this to another used one, but there is still trouble with the brakes.

It actually seem that if one taps on the brake padel during drive, it will sometimes release the brakes somewhat, but it still get warms and hangs....so can't really be driven.



Any thoughts? - I thought it would be the return valve of the brake booster that failes, but seem not to be the case......