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Second para is not correct, the self-adjusting nature of the clutch
means wear at the slave end is automatically compensated for. I know I
have no experience of the MGA but read Barney Gaylord's page, the
paragraph commencing "One of the key features ...":
https://mgaguru.com/mgtech/clutch/ct_100.htm
Yes there should be some free play at the pedal. If the master piston
can't come back the bypass port may not open and fluid not be able to
flow freely between reservoir and slave with the pedal released. This
is essential so that fluid expansion as the system heats up does not
apply excess pressure to the release bearing with the pedal released
which can cause clutch slip, and also to allow the self-adjusting
function to operate correctly. OTOH too much free play e.g. from worn
components there causes a low biting point, which is why I said if the
biting point is fine then leave it alone.
PaulH.
On 30/10/2023 18:25, Eric Russell wrote:
> There should be a small amount of free play at the pushrod to master
> cylinder piston (~ 1/16" which translates to ~ 3/8" at the pedal).
> This ensures the piston is able to fully return to the off position.
>
> Check the pushrod & clevis pin at the slave cylinder. Since they are
> exposed to the elements they will often wear - the hole in the pushrod
> becoming elongated & the clevis pin looking more like a mini
> crankshaft. All that lost motion means the clutch doesn't operate
> through a full stroke.
>
> EjR
>
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<p>Second para is not correct, the self-adjusting nature of the
clutch means wear at the slave end is automatically compensated
for. I know I have no experience of the MGA but read Barney
Gaylord's page, the paragraph commencing "One of the key features
...": <a class="moz-txt-link-freetext"
href="https://mgaguru.com/mgtech/clutch/ct_100.htm";>https://mgaguru.com/mgtech/clutch/ct_100.htm</a></p>
<p>Yes there should be some free play at the pedal. If the master
piston can't come back the bypass port may not open and fluid not
be able to flow freely between reservoir and slave with the pedal
released. This is essential so that fluid expansion as the system
heats up does not apply excess pressure to the release bearing
with the pedal released which can cause clutch slip, and also to
allow the self-adjusting function to operate correctly. OTOH too
much free play e.g. from worn components there causes a low biting
point, which is why I said if the biting point is fine then leave
it alone.<br>
</p>
<p>PaulH.<br>
</p>
<div class="moz-cite-prefix">On 30/10/2023 18:25, Eric Russell
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAP7dBXBpY7sHstxfvbn7N1po2+XGapTLn6Q0BXokrh9+o=8W8g@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">
<div class="gmail_default" style="font-size:large">There should
be a small amount of free play at the pushrod to master
cylinder piston (~ 1/16" which translates to ~ 3/8" at the
pedal). This ensures the piston is able to fully return to the
off position. </div>
<div class="gmail_default" style="font-size:large"><br>
</div>
<div class="gmail_default" style="font-size:large">Check the
pushrod & clevis pin at the slave cylinder. Since they are
exposed to the elements they will often wear - the hole in the
pushrod becoming elongated & the clevis pin looking more
like a mini crankshaft. All that lost motion means the clutch
doesn't operate through a full stroke. </div>
<div class="gmail_default" style="font-size:large"><br>
</div>
<div class="gmail_default" style="font-size:large">EjR <br>
</div>
</div>
<br>
</blockquote>
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