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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
pedal.
M
On Wed, Feb 12, 2020, 8:46 AM , <simon.lachlan@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=E2=80=99t seem want to push the piston anywhere=E2=80=A6=E2=80=
=A6
> 3. With the slave cylinder on the bench, I can push the piston in with
> my thumb. Bit stiff, but I suppose that=E2=80=99s to be expected. How =
easy should
> it be and should it spring back?
> 4. I=E2=80=99ve used a rebuild kit from one of our better suppliers=E2=
=80=A6=E2=80=A6are 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=E2=80=A6..
>
> I=E2=80=99m 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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<div dir=3D"auto">The secret to that was revealed to me in an old Humber ma=
nual=C2=A0<div dir=3D"auto">The spring is installed to facilitate initial b=
leeding. 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 ble=
ed screw closed there is no "free play" to take up and the clutch=
releases upon the first press of the pedal.</div><div dir=3D"auto"><br></d=
iv><div dir=3D"auto">M</div></div><br><div class=3D"gmail_quote"><div dir=
=3D"ltr" class=3D"gmail_attr">On Wed, Feb 12, 2020, 8:46 AM , <<a href=
=3D"mailto:simon.lachlan@alexarevel.plus.com";>simon.lachlan@alexarevel.plus=
.com</a>> wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"mar=
gin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang=3D"EN=
-GB" link=3D"#0563C1" vlink=3D"#954F72"><div class=3D"m_-322382631270552271=
9WordSection1"><p class=3D"MsoNormal">I am trying to get my head around the=
workings of the clutch slave cylinder in my MkII BT7.<u></u><u></u></p><p =
class=3D"MsoNormal">Plainly the fluid comes in the back, underneath and pus=
hes the rod outwards ie towards the rear of the car.<u></u><u></u></p><ol s=
tyle=3D"margin-top:0cm" start=3D"1" type=3D"1"><li class=3D"m_-322382631270=
5522719MsoListParagraph" style=3D"margin-left:0cm">So, what is the purpose =
of the spring behind the piston/rubber? <u></u><u></u></li><li class=3D"m_-=
3223826312705522719MsoListParagraph" style=3D"margin-left:0cm">Is that (sil=
ly little) spring supposed to do anything? It certainly doesn=E2=80=99t see=
m want to push the piston anywhere=E2=80=A6=E2=80=A6<u></u><u></u></li><li =
class=3D"m_-3223826312705522719MsoListParagraph" style=3D"margin-left:0cm">=
With the slave cylinder on the bench, I can push the piston in with my thum=
b. Bit stiff, but I suppose that=E2=80=99s to be expected. How easy should =
it be and should it spring back? <u></u><u></u></li><li class=3D"m_-3223826=
312705522719MsoListParagraph" style=3D"margin-left:0cm">I=E2=80=99ve used a=
rebuild kit from one of our better suppliers=E2=80=A6=E2=80=A6are these ki=
ts problematical? I recall that, for example, the servo rebuild kits were/a=
re notorious.<u></u><u></u></li></ol><p class=3D"MsoNormal">I rebuilt it, r=
einstalled it and the whole issue was solid as a rock. No movement of the r=
od at all=E2=80=A6..<u></u><u></u></p><p class=3D"MsoNormal">I=E2=80=99m go=
ing wrong somewhere. Surprise, surprise! But it seemed like a straightforwa=
rd task and, barring some access issues, the spanner work is simple enough.=
<u></u><u></u></p><p class=3D"MsoNormal">Any clues?<u></u><u></u></p><p cla=
ss=3D"MsoNormal">Simon<u></u><u></u></p></div></div>_______________________=
________________________<br>
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</blockquote></div>
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