At the point I thought I was nearly finished a rather annoying issue has arisen 2 days before my engine tune.

My brakes are sticking, not entirely but enough to be an issue. System is a twin master setup, in typical front/back arrangement via a bias bar on the pedal.

When the pedal is used the brakes will bind, if you release some pressure via the bleed nipples (either side) both calipers release. Same issue front and rear.

Calipers are rebuilt (professionally), masters were re-built by me (ive striped one down to check i did it right) flexie hoses are new. rear discs are new, all pads new.

The masters are returning fully.

Any Ideas?


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Description


Description

When the pedal is released is there slight free play in the master cylinder push rods? If not it will hold residual pressure as the pistons can't return far enough to uncover the holes to the reservoirs. It's fairly common mistake to make. Ifg that is the cause, adjust the rods and it should be OK

The rods are tight, but are hard up against the front washer/stop.

Can the rods return too far?

Double check the master cylinders are fully returned, with a minute amount of play. Being the calliper pistons return when pressure is released I'd say the problem is with master cylinder.

Is that seal in last picture correct way round?

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Originally posted by theprisioner
Is that seal in last picture correct way round?

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Just enough to be detectable.

When I was looking at moving my brake pedals forwards I was told that I would need to cut down the master cylinder rods to get them to work effectively and to make certain that I had enough play to get the brakes to release... this sounds like your issue but could be wrong!

Alex

You need large penny washers between the pedal tube and the clevis to stop it binding and there should be a slight gap in there too, the pushrods need to be square to the longitudinal axis of the cylinder and as previously said there needs to be play at the end of the rod travel.

All this Will ensure they come fully back.

Have a read at this linky

So I found the issue, although the rods were fully returning the retaining washer on the master cylinders was the wrong way round. Spent this morning swapping them round and bingo working brakes.

Thanks all for your help as always