[Healeys] Clutch slave cylinder

Michael Salter michaelsalter at gmail.com
Tue Feb 11 16:58:52 MST 2020

The secret to that was revealed to me in an old Humber manual
The spring is installed to facilitate initial bleeding. The idea is that it
holds the release bearing lightly against the clutch thrust face so that
when the system is filled with fluid and the bleed screw closed there is no
"free play" to take up and the clutch releases upon the first press of the


On Wed, Feb 12, 2020, 8:46 AM , <simon.lachlan at alexarevel.plus.com> wrote:

> I am trying to get my head around the workings of the clutch slave
> cylinder in my MkII BT7.
> Plainly the fluid comes in the back, underneath and pushes the rod
> outwards ie towards the rear of the car.
>    1. So, what is the purpose of the spring behind the piston/rubber?
>    2. Is that (silly little) spring supposed to do anything? It certainly
>    doesn’t seem want to push the piston anywhere……
>    3. With the slave cylinder on the bench, I can push the piston in with
>    my thumb. Bit stiff, but I suppose that’s to be expected. How easy should
>    it be and should it spring back?
>    4. I’ve used a rebuild kit from one of our better suppliers……are these
>    kits problematical? I recall that, for example, the servo rebuild kits
>    were/are notorious.
> I rebuilt it, reinstalled it and the whole issue was solid as a rock. No
> movement of the rod at all…..
> I’m going wrong somewhere. Surprise, surprise! But it seemed like a
> straightforward task and, barring some access issues, the spanner work is
> simple enough.
> Any clues?
> Simon
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