Hello from Dan.
I drive a 1994 Winnebago Vectra diesel pusher with air over hydraulic...
It uses air to press a master cylinder.. ( there are 2 single systems )
one of them was leaking fluid from moisture collecting in the bottom, until the corrosion allowed brake fluid to leak past.
I could find no rebuild kits for the master cylinders.
on disassembly I find the corrosion too deep to clean up with a hone.
and the only place I could find replacements were either $1000 or a "suitable replacement " (fork lift )[http://www.powerbrake-drivetrain.com...-MASTE/detail]
that would work for $500 each, so I bought 2 of them. ouch. replacement went well and they work ok.. pedal feel was some what spongy from what the other master cylinder were, you could still lock the 4 wheel disc brakes, but they still felt spongy. and just didn't feel right. after a year of searching, I did find a place that WOULD rebuild them for less than $150 each !!! stainless steel sleeve inserts !!! no more problem with corrosion !!! Welcome to Precision Rebuilders.com
I spoke to TIm Henderson at length on operations and options. he has been doing this for 40 years he said. very forthcoming with information and help. So I sent them my old ones, and with in 1 week I got them back.. I replaced the master cylinders back to the newly rebuilt ones, and WOW !!! back to wonderful pedal feel, and brakes that work like a cadillac !!
mind you the other ones work OK, and are a workable replacement, they just do not feel the same..
So if your brakes or failing you, call these guys, they will put a stop to bakes that don't work!
Welcome to Precision Rebuilders.com