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I have recently removed the engine to answer the question of friction plat=
e binding. It was.
That same rusty powder that appears around dry door hinges in a hose was p=
resent on the area around the plate=E2=80=99s splines. Pushing and pulling b=
y hand, the plate would not slide smoothly on its splines. It had been inst=
alled ten years and 30M miles ago.
I checked the bushing on throw-out lever, the pivot bolt also, which were f=
ine. The throw-out bearing measured a couple of thousands _thicker_ than a n=
ew one, so I used the old again, but bought a new AP friction plate even tho=
ugh the old appeared, aside from the rust powder, almost unworn.=20
Difficult shifting is now history.
Bob
=20
> On May 28, 2019, at 3:43 AM, PaulHunt73 via Mgs <mgs@autox.team.net> wrote=
:
>=20
> Unlike physical wear at the pedal linkage, similar wear at the slave end h=
as no effect on clutch operation, the hydraulic system is designed to take a=
ccount of all wear at the clutch end. Remember the graphite release bearing=
is going to wear down by a 1/4" or so over the life of the clutch, and give=
n the unequal lengths of the release arm that is going to be getting on for a=
n inch at the slave cylinder. The piston simply moves out to take it up, an=
d more fluid back-fills from the reservoir.
> =20
> If it's dragging exactly the same as before, and you have about 1/2" of tr=
avel of the slave push-rod, then something is binding at the clutch. Either=
the friction plate is very stiff on its splines, or the end of the first-mo=
tion shaft is dragging badly in the pilot bearing. Could also be the releas=
e bearing breaking up and not pushing evenly on the cover plate. Time to pu=
ll the engine - much easier than pulling both - on an MGB at least.
> =20
> PaulH.
> ----- Original Message -----
>> Replaced the clutch hose and the slave. Still not shifting.
>> When you push in the clutch, the lever arm on the trans moves a decent am=
ount. I didn=E2=80=99t measure it, but its probably =C2=BD=E2=80=9D to =C2=BE=
=E2=80=9D, something like that.=20
> _______________________________________________
>=20
> Mgs@autox.team.net
> Donate: http://www.team.net/donate.html
> Suggested annual donation $12.75
>=20
> Archive: http://www.team.net/pipermail/mgs http://autox.team.net/archive
>=20
> Unsubscribe: http://autox.team.net/mailman/options/mgs/mgbobh@gmail.com
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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto"><div dir=3D"ltr"></div><div dir=3D"ltr">&nb=
sp; I have recently removed the engine to answer the question of friction pl=
ate binding. It was.</div><div dir=3D"ltr"> That same rusty powd=
er that appears around dry door hinges in a hose was present on the area aro=
und the plate=E2=80=99s splines. Pushing and pulling by hand, the plat=
e would not slide smoothly on its splines. It had been installed ten y=
ears and 30M miles ago.</div><div dir=3D"ltr"> I checked the bushing o=
n throw-out lever, the pivot bolt also, which were fine. The throw-out beari=
ng measured a couple of thousands _thicker_ than a new one, so I used the ol=
d again, but bought a new AP friction plate even though the old appeared, as=
ide from the rust powder, almost unworn. </div><div dir=3D"ltr"> D=
ifficult shifting is now history.</div><div dir=3D"ltr">Bob</div><div dir=3D=
"ltr"><br></div><div dir=3D"ltr"> </div><div dir=3D"ltr"><br>On May 28,=
2019, at 3:43 AM, PaulHunt73 via Mgs <<a href=3D"mailto:mgs@autox.team.n=
et">mgs@autox.team.net</a>> wrote:<br><br></div><blockquote type=3D"cite"=
><div dir=3D"ltr">
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<div><font size=3D"2">Unlike physical wear at the pedal linkage, similar wea=
r at the=20
slave end has no effect on clutch operation, the hydraulic system is=20=
designed to take account of all wear at the clutch end. Remember the=20=
graphite release bearing is going to wear down by a 1/4" or so over the life=
of=20
the clutch, and given the unequal lengths of the release arm that is going t=
o be=20
getting on for an inch at the slave cylinder. The piston simply moves o=
ut=20
to take it up, and more fluid back-fills from the reservoir.</font></div>
<div><font size=3D"2"></font> </div>
<div><font size=3D"2">If it's dragging exactly the same as before, and you h=
ave=20
about 1/2" of travel of the slave push-rod, then something is binding a=
t=20
the clutch. Either the friction plate is very stiff on its splines, or=
the=20
end of the first-motion shaft is dragging badly in the pilot bearing. =20=
Could also be the release bearing breaking up and not pushing evenly on the=20=
cover plate. Time to pull the engine - much easier than pulling b=
oth=20
- on an MGB at least.</font></div>
<div><font size=3D"2"></font> </div>
<div><font size=3D"2">PaulH.</font></div>
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<div style=3D"FONT: 10pt arial">----- Original Message ----- </div>
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<div>
<p class=3D"MsoNormal">Replaced the clutch hose and the slave. Sti=
ll not=20
shifting.<o:p></o:p></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"></font><o:p></o:p=
></p>
<p class=3D"MsoNormal">When you push in the clutch, the lever arm on the=
trans=20
moves a decent amount. I didn=E2=80=99t measure it, but its probab=
ly =C2=BD=E2=80=9D to =C2=BE=E2=80=9D,=20
something like that. =20
<o:p></o:p></p></div></div></div></div></blockquote></blockquote>
</div></blockquote><blockquote type=3D"cite"><div dir=3D"ltr"><span>________=
_______________________________________</span><br><span></span><br><span><a h=
ref=3D"mailto:Mgs@autox.team.net";>Mgs@autox.team.net</a></span><br><span>Don=
ate: <a href=3D"http://www.team.net/donate.html";>http://www.team.net/donate.=
html</a></span><br><span>Suggested annual donation $12.75</span><br><s=
pan></span><br><span>Archive: <a href=3D"http://www.team.net/pipermail/mgs";>=
http://www.team.net/pipermail/mgs</a> <a href=3D"http://autox.team.net/archi=
ve">http://autox.team.net/archive</a></span><br><span></span><br><span>Unsub=
scribe: <a href=3D"http://autox.team.net/mailman/options/mgs/mgbobh@gmail.co=
m">http://autox.team.net/mailman/options/mgs/mgbobh@gmail.com</a></span><br>=
</div></blockquote></body></html>=
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_______________________________________________
Mgs@autox.team.net
Archive: http://www.team.net/pipermail/mgs http://autox.team.net/archive
Unsubscribe: http://autox.team.net/mailman/options/mgs/mharc@autox.team.net
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