[Healeys] Sleeving Wheel Cylinders

[Harold Manifold]

Patrick,

I have attached some good information about bleeding Healey brakes I saved
from an older post. It has good tips about adjusting the brakes shoes as
part of the process.

I trust this helps.... Harold

-----Original Message-----
From: Healeys [mailto:healeys-bounces at autox.team.net] On Behalf Of Bob
Haskell
Sent: Saturday, April 07, 2018 6:49 AM
To: Patrick & Caroline Quinn; healeys at autox.team.net
Subject: Re: [Healeys] Sleeving Wheel Cylinders

Patrick,

If you're going to re-sleeve a set of wheel cylinders, I'd do the original
7/8" ones.

Are the brake shoes properly adjusted?  You're not loosing pedal because the
system has to move the shoes to the drums first?

How did you bleed the master cylinder?  I've used an ezibleed on my tri-carb
for years without an issue; until recently.  Couldn't get a good pedal after
changing the master cylinder.  Although I had bench bleed it, I had to bleed
the brakes the "old way" by pumping the brake pedal to get all the air out.

Are you using conventional or silicone fluid?  Are the master cylinder seals
compatible with the fluid?  Roger Moment wrote an article in the Healey
magazine several years ago about the seals swelling enough to keep the
cylinder from working correctly.

The larger front wheel cylinders will change the brake balance.  Less force
on the fronts.

Cheers,

Bob Haskell
AHCA 3000 MkI registrar
http://www.ciahc.org/registry_3000mk1.php

On 04/07/2018 07:12 AM, Patrick & Caroline Quinn wrote:
> Greetings
> 
> Following spending quite a bit of my lifetime bleeding the brakes on 
> the
> BN3 I have reached a moment of inspiration.
> 
> While I have managed to extract all the air from the system there is 
> still a poor pedal.
> 
> New pipes, hoses, reservoir and front wheel cylinders. Rebuilt master 
> cylinder.
> 
> The master cylinder is a standard 100 unit and the new wheel cylinders 
> were needed due to the poor condition of the old 7/8in cylinders. This 
> afternoon I recalled that the new cylinders are 1in units. Methinks 
> that the poor pedal is being caused by the larger diameter wheel 
> cylinders and that the master cylinder is not coping.
> 
> How is my logic? Would it be possible to resleeve the wheel cylinders 
> from 1in to 7/8in?
> 
> Thanks
> 
> Patrick Quinn
> 
> Blue Mountains, Australia
> 
> 
> 
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