The dowels are important for correctly locating the clutch housing
(the sheet metal part that surrounds the pressure plate). The screws
hold the housing to the flywheel, but are required to be tough to
handle the tensile stress. The dowels are harder and are machined to
a closer tolerance than can be achieved on the screw/screw-hole
combination. The housing should fit tightly onto the dowels so there
is no relative (rotational) motion between the flywheel and the
housing; the screws prevent any axial motion. Two different items for
different purposes.
(Sorry for including the entirety of all previous posts; I couldn't see a good
place to trim anything.)
Donald.
> From: "Bob Kramer" <rgk@flash.net>
> Date: Sun, 21 May 2000 22:50:18 -0500
>
>
> I put the dowels in no matter what. My wife's TR6 PO put the clutch back on
> without dowels, and even though it was torqued down correctly, the plate
> moved back and forth, eroding the threads on the bolts. I'm not sure if the
> OEM bolts had the slightest shank to prevent this or not, but IMHO it is not
> worth the chance of failure not to use the pegs.
>
> Bob Kramer
> TR4,TR4A, TR6, 2.5 Saloon
> rgk@flash.net
> ----- Original Message -----
> From: Hugh Barber <trnut@cwnet.com>
> To: Sloan, Jim <JSloan@talisman-energy.com>; <triumphs@autox.team.net>
> Sent: Friday, May 19, 2000 1:22 PM
> Subject: Re: 1974 TR-6 Clutch Locating Pins
>
>
> >
> > Jim,
> >
> > The dowels on the flywheel are for locating the pressure plate. The
>competition
> > preparation manual says if you upgrade the size of the mounting bolts, you
>can
> > omit the dowels. IMHO, if you have already reassembled everything and its
>working
> > OK, I wouldn't disassemble it just to deal with the missing dowel pins. If
> > you did not resurface your flywheel, the squeel might be from a glazed
>flywheel
> > surface.
> >
> > Hope this helps,
> >
> > Hugh Barber
> > '73 TR6
> >
> >
> > >
> > >When removing/re-installing my pressure plate last week I noticed only 1
> > >locating pin (or dowel) was present. The Bentley manual says there are 3,
> > >and I did see the other 2 empty holes. Initially I thought they might be
> > >placed at irregular intervals to ensure the plate goes on only one way,
> > >but they seem symmetrically spaced. The only other thing that comes to mind
> > >is that they are for strength but there are 6 bolts holding the plate to
>the
> > >flywheel already. What are they for?
> > >
> > >Also is it a good idea to lightly use wheel bearing grease on the contact
> > >point between the release bearing and the clutch fingers? I have a light
> > >squeal when initially depressing the clutch. The release bearing is a new
> > >Landcruiser upgrade so I don't think thats the problem.
> > >Jim Sloan 74 TR-6.
> > >
> > >
> >
>
>
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