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Hi,
As others have already mentioned, the annular throw out bearing setup can h=
ave issues and resolving them at the track is a PITA. For that reason, I've=
stayed with the stock setup and external hydraulics. I just do a few thing=
s to make sure the weak spot for the stock setup won't fail - namely, drill=
and pin the clutch fork to the cross shaft. Use a 3/16 or 1/4 inch roll pi=
n. With that setup, you can easily remove the taper pin and the roll pin to=
get the cross shaft out. You want this because there's a good chance at so=
me point you'll need to access the front layshaft cover for leaks or laysha=
ft replacement. But, I've been using this setup for years with excellent re=
liability and EASY maintenance on the track or on the road.
This also assumes a stock transmission... or at the very least a stock-deri=
ved bell housing. If you have Toyota or other, you may have different optio=
ns.
The key for the annular bearings is to get the clearances set so you can ov=
er-operate the hydraulic bearing and it's probably best to do that on the b=
ench and then document what you did for future reference.
Regards,Bob Lang
On Sunday, August 18, 2024 at 10:15:41 PM EDT, Mark Cook via Fot <fot@a=
utox.team.net> wrote: =20
=20
So, I one of my TR6s has a close ratio transmission with Mcleod hydraulic =
release bearing, which is leaking.=C2=A0 While there, trying to decide on w=
hether to go back to a stock bearing, yoke etc, with an external slave cyli=
nder.=C2=A0 For reference, as part of the engine rebuild, going with the Ra=
cetorations Arrow billet crank, 7 1/4" lightweight flywheel, cover and four=
paddle clutch disc.=20
Not keen on having to remove the transmission for seal leaks related to the=
hydraulic release bearing.=C2=A0 At the same time not familiar enough to k=
now if a hydraulic release bearing's failure rate is any worse than a stand=
ard release bearing.=C2=A0 Everything I have read makes the hydraulic beari=
ng seem more sensitive to initial set up as well.
Thoughts?
Thanks,
Mark Cook
_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
@yahoo.com
=20
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<html><head></head><body><div class=3D"ydp7c588e5yahoo-style-wrap" style=3D=
"font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;">=
<div></div>
<div dir=3D"ltr" data-setdir=3D"false">Hi,</div><div dir=3D"ltr" da=
ta-setdir=3D"false"><br></div><div dir=3D"ltr" data-setdir=3D"false">As oth=
ers have already mentioned, the annular throw out bearing setup can have is=
sues and resolving them at the track is a PITA. For that reason, I've staye=
d with the stock setup and external hydraulics. I just do a few things to m=
ake sure the weak spot for the stock setup won't fail - namely, drill and p=
in the clutch fork to the cross shaft. Use a 3/16 or 1/4 inch roll pin. Wit=
h that setup, you can easily remove the taper pin and the roll pin to get t=
he cross shaft out. You want this because there's a good chance at some poi=
nt you'll need to access the front layshaft cover for leaks or layshaft rep=
lacement. But, I've been using this setup for years with excellent reliabil=
ity and EASY maintenance on the track or on the road.</div><div dir=3D"ltr"=
data-setdir=3D"false"><br></div><div dir=3D"ltr" data-setdir=3D"false">Thi=
s also assumes a stock transmission... or at the very least a stock-derived=
bell housing. If you have Toyota or other, you may have different options.=
</div><div dir=3D"ltr" data-setdir=3D"false"><br></div><div dir=3D"ltr" dat=
a-setdir=3D"false">The key for the annular bearings is to get the clearance=
s set so you can over-operate the hydraulic bearing and it's probably best =
to do that on the bench and then document what you did for future reference=
.</div><div dir=3D"ltr" data-setdir=3D"false"><br></div><div dir=3D"ltr" da=
ta-setdir=3D"false">Regards,</div><div dir=3D"ltr" data-setdir=3D"false">Bo=
b Lang<br></div><div dir=3D"ltr" data-setdir=3D"false"><br></div><div dir=
=3D"ltr" data-setdir=3D"false"><br></div><div><br></div>
=20
</div><div id=3D"ydpbd8e4767yahoo_quoted_4422871182" class=3D"ydpbd=
8e4767yahoo_quoted">
<div style=3D"font-family:'Helvetica Neue', Helvetica, Arial, s=
ans-serif;font-size:13px;color:#26282a;">
=20
<div>
On Sunday, August 18, 2024 at 10:15:41 PM EDT, Mark=
Cook via Fot <fot@autox.team.net> wrote:
</div>
<div><br></div>
<div><br></div>
=20
=20
<div><div dir=3D"ltr">So, I one of my TR6s has a close rati=
o transmission with Mcleod hydraulic release bearing, which is leaking.&nbs=
p; While there, trying to decide on whether to go back to a stock bearing, =
yoke etc, with an external slave cylinder. For reference, as part of =
the engine rebuild, going with the Racetorations Arrow billet crank, 7 1/4"=
lightweight flywheel, cover and four paddle clutch disc. <br></div><div di=
r=3D"ltr"><br></div><div dir=3D"ltr">Not keen on having to remove the trans=
mission for seal leaks related to the hydraulic release bearing. At t=
he same time not familiar enough to know if a hydraulic release bearing's f=
ailure rate is any worse than a standard release bearing. Everything =
I have read makes the hydraulic bearing seem more sensitive to initial set =
up as well.<br></div><div dir=3D"ltr"><br></div><div dir=3D"ltr">Thoughts?<=
br></div><div dir=3D"ltr"><br></div><div dir=3D"ltr">Thanks,<br></div><div =
dir=3D"ltr"><br></div><div dir=3D"ltr">Mark Cook<br></div><div dir=3D"ltr">=
<br></div><div dir=3D"ltr"><br></div><div dir=3D"ltr"><br></div><div dir=3D=
"ltr"><br></div><div dir=3D"ltr">__________________________________________=
_____<br></div><div dir=3D"ltr"><a href=3D"mailto:fot@autox.team.net"; rel=
=3D"nofollow" target=3D"_blank">fot@autox.team.net</a><br></div><div dir=3D=
"ltr"><br></div><div dir=3D"ltr"><a href=3D"http://www.fot-racing.com"; rel=
=3D"nofollow" target=3D"_blank">http://www.fot-racing.com</a><br></div><div=
dir=3D"ltr"><br></div><div dir=3D"ltr">Donate: <a href=3D"http://www.team.=
net/donate.html" rel=3D"nofollow" target=3D"_blank">http://www.team.net/don=
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_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
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