[T2] Rear brake problem, brakes lock when braking

[david raistrick]

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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