[Healeys] 100 brakes

[Hank Leach]

It sure sounds like air. The 100 system is difficult to bleed due to
the placement of the wheel cylinders and bleeders. I like to pull out
the fluid rather than push out the stuff. Use something like a Mityvac
to do this starting at the right rear. 
The smallest bubbles will create a lot of pedal travel but if it pumps
up to a hard pedal then its for sure air in the system. Keep the cap
on the canister when bleeding and check under the canister for a wet
finger. Moss has good seals for that purpose.
The word "new" in brake systems scares me, as there are so many crappy
replacement parts made in foreign countries that look like good new
items. I prefer to rebuilt original or sleeve them if necessary to use
the original items. The seal kits are another story. Can you find good
Girling repair kits. Many of the foreign replacements are knockoffs of
the original. Use TRW (they bought Lockheed) only-not unknown
brands...even new Lucas is not old Lucas.
I pumped and pulled gallons of brake fluid thru a MKI bugeye system
only to find the seal stuck in the back of the master cylinder because
the Moss purchased seals were too big! Use TRW. When I got the
replacement seals from them, they had the same number stamp on the
seal. They are using the same molds to make the seals.
Did you use red grease on all the threaded fittings? Check all for a
wet finger. Hope this info lessens your frustration. A word that goes
hand in hand with brake bleeding. Hank

	-----------------------------------------From: "warthodson--- via
Healeys" 
To: "healeys at autox.team.net"
Cc: 
Sent: Monday March 13 2023 12:07:18PM
Subject: [Healeys] 100 brakes

 We are having a very difficult time adjusting & bleeding the brakes
on a friend's BN1. The car has recently under a full ground up
restoration so things like brake lines including flex lines are new,
seals in the brake cylinders are new, the master cyl. is new, etc. We
bleed the system so many times different way that I have lost track. 
We have adjusted the free play to assure that the plunger is able to
return to the full "off" position. When we adjust the operating rod to
achieve the specified 1/8" free movement at the pedal. We have
adjusted the brake shoes to have a very slight drag at rest. Our issue
is: Excessive brake pedal travel before the brakes begin to be
effective.  Pumping the brakes temporarily improve the pedal travel
issue, which we think indicates air still in the system. We are not
having any leaks & the reservoir port is functioning correctly, IE: no
locking up of the brakes.  Gary
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