Mike
If you still have a 7/8 bore drum brake master, you will see the rear
try to come around to the front when you put disc brakes on it.
also if the rubber brake hoses are old, replace them.
10 years max on these hoses for safty sake.
the stainless steel braided hoses make a nice upgrade too.
The rubber swells and closes up and even worse, old rubber hoses will
burst when you least expect it. That means no brakes!
Also, in the master cylinder, there is a brake valve. I have seen this
get stuck in the clutch bore during a previous rebuild. It's easy to do
because while you are working on the master, it's backwards on the work
bench and you tend to stick the brake parts in the clutch bore.
check the book, there is a valve and/or a rubber stop at the back of the
bore (brake side only)
Also check for fluid weeping from any of the unions. Especially the
master/pipe. rust or a cracked pipe will make for air getting in the line.
You can try a power bleed, if you have a spare master cap, pop the thin
top vent hole cap off the screw on cap, drill a 1/4" hole in it and use
20 psi of air forced into the master as a helper opens up a back
bleeder. Sometimes the right bottle cap will fit the master, just check
the cupboard and steal a cap, drill a hole in it and power bleed.
if you must use your only master cap, the vent cap will cover the
drilled hole. Not a problem unless it's concours.
--
Frank Clarici
Toms River, NJ
5 British cars on the road
http://www.exit109.com/~spritenut
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