[T2] Rear brake problem, brakes lock when braking

Daniel Martinelli daniel.martinelli at gmx.ch
Fri Jan 11 08:55:48 PST 2019


Hi David

Thanks, that was quick!

Tires are fine, both rears are locking the same, actually perfectly
symetrically.

By clicks you mean the hand brake? We adjusted the rear shoes correctly but
no progress.

Hmm, but the brake drums could be guilty. Just weird, that both rear brakes
act exactly the same way.



On Fri, 11 Jan 2019 at 17:40, david raistrick <keen at icantclick.org> wrote:

> tires?  different sizes (not uncommon on lowered buses) change brake
> bias, or just a simple lack of rear wheel grip from subpar rubber can
> too.
>
> rear shoes may be adjusted too tight?  I've had some brakes that like
> 3 clicks, others that like 5..
>
> is it one or both rears locking?  a warped drum could cause one (..or
> both if both are warped) to lock.
>
>
>
> On Fri, Jan 11, 2019 at 11:33 AM Daniel Martinelli
> <daniel.martinelli at gmx.ch> wrote:
> >
> > Dear all
> >
> > A friend of mine has a weird problem with his T2b camper rear brakes.
> When
> > braking hard, on the road, the rear brakes lock up. We replaced the front
> > disk brake pads to no avail, checked the caliper pistons and they are
> fine.
> > Tires are almost new and correctly inflated.
> >
> > On the test stand, when tested independently the rear and front brakes
> work
> > perfectly.
> >
> > We thought it could be the proportional valve, replaced it but the
> problem
> > persists.
> >
> > Sooo, apart from the proportional valve, what could influence brake
> > distribution from front to back? We are at a loss here.
> >
> > Any thoughts?
> >
> > Thanks a lot
> >
> > Cheers!
> >
> > Daniel
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