Mk1 rear disc brake problem

[Memphis]

Does anybody know what this is and if it’s adjustable


My mk1 has rear discs but locks them up all the time.

[Peter Jones]

That's a proportioning valve off a later golf.

Normally that self adjusts with suspension movement, yours has been locked in place.

You should be able to adjust it to the fully loded position and change the brake bias. Looks like you're up for some fiddling to sort it out though.

Change the length of that threaded rod. I'm not if it needs to be longer or shorter.

Pete

[Preen59]

You'd be better off to put some adjustable inline bias valves in mate. Smaller and less complicated.

[Memphis]

Thanks for the reply's, so if i put some inline valves can i leave this setup as is?

[Memphis]

Also noticed the rh rear spring touching tyre slightly, at a ruff measurement the rh wheel is sitting 10mm inward compared to the lh
I still have even wear on the tyre. I'm thinking the trailing arm has been bent? any ideas
Thanks in advance

[Jarred]

is it just the photo or is that spring bent?