Reply To: Master cylinder refurbishment issues.2819

[Joseph Dobson]

Dear Chris,

I read this article and examined the diagram which is essentially the same as my master cylinder. The seals in the kit were correct for my cylinder so no reason to suspect otherwise. However, I think I may have solved the problem but why my modification should make any difference I am not sure as the previous set up was OK (yes, I know, if its not broke why mend it). I realised that the rear seal on the piston was almost against the thick stop washer that’s held in with ring clip. The machining or casting inlet to the bore of the cylinder where the recess has been made for the spring clip is just slightly larger than the true bore so the seal had partially lost its ability to seal hence the leak. In order to attempt to rectify this I placed a thick rubber washer between the piston and stop to prevent the piston being pushed all the way back by the spring. So far the leak has not again manifested itself but I still need the replacement hoses as one of those certainly does leak.

Thank you for your support, best wishes, Joseph