I plan to rebuild but having a correct spare on hand is always nice. And damn!! People who sell this stuff need to get a clue and do some research. I'm finding 19mm masters listed for '70 buses all over the place. The '70 is a one-year-only 22mm cylinder for use without a booster. '69 down used the 19mm cylinder and '71 started with the booster assist (it was either 22mm or 23.8mm -- I think '72 went up to 23.8mm). I need to crawl under and look at mine to be sure it is a correct 22mm ATE master before I order a rebuild kit. It may have been replaced with an incorrect 19mm at some point. I've located a NOS 22mm ATE for $80 just in case. G2 On Mon, 17 May 2010 17:04:27 -0400 "Will" <evil.scientist.boo@xxxxxxxxx> wrote: > Just run with one switch > > Brake MCs on busses are one of those catch as you can items. > Have you considered rebuilding yours? > > > > > -- Sent from my Palm Pre > On May 17, 2010 2:40 PM, Gerald Livingston > <gerald.tcb@xxxxxxxxxxxxx> wrote: > > Why do all of the new master cylinders I can find state "for one brake > > light switch" but the actually installed on my '70 has 2? Even the > > German listed at Bus Depot (for $180) says "Brake Master Cylinder, > 1970 > > 22.2mm, w/o Servo, (For ONLY 1 Brake Light Switch)" > > > > Mine has 2 switches and the "oops light" on the dash. Any reasonably > > priced CORRECT replacements out there? > > > > G2 > > > > P.S. > > > > The valve inside mine is going out. Sitting with foot on brake the > > pedal will suddenly drop to the floor. Lift foot, press again, all is > > good. No leaks. Reservoir still full. > > > >