> > > My '78 (Murray) is braking rather irregularly these days. After long > > > highway sections (infrequent braking) the brake pedal sinks rather > > > close to the floor without producing much stopping power. The problem > > > is resolved after a pump or two when brake pressure is returned. > > snip... > > > Mark, have you been losing brake fluid? Any wetness anywhwere in the > > braking system that might indicate a leak in the system? Wheel > > cylinders, master cylinders, couplings in the lines?
I just replaced the (leaking) master cylinder on my '71, which is rather a different creature than your '78. But guess what I found-- the vacuum servo for the power brakes (master cyl bolts to it) was COMPLETELY FULL of old, grungy-looking brake fluid. We're talking like a quart or two here. This bus (got it recently) must have been losing brake fluid for a LONG time, without any ever showing up on wheels, master cyl or servo exterior, or any place else-- until the engine started blowing out vast clouds of opaque, white smoke. Something you might want to check. -Steve Maher smaher@gi.com '71 VW Transporter
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