Hi Bob,
Just did this today on my TR3A. First fit the seal and coat it with brake
fluid to help the piston to slide more easily. Don't put the dust cap on
yet. Insert the piston allowing enough of the piston to stay above the
caliper casing. Attach the dust cover at this point. Make sure you put it on
right side up. I used the blunt end of a dental pick to apply pressure to
the edge of the boot so it would enter the groove in the piston.
Alex
72 TR6
59 TR3A
----- Original Message -----
From: "Bob Labuz" <yellowtr@adelphia.net>
To: <lbc.resto@comcast.net>
Cc: <Triumphs@autox.team.net>
Sent: Sunday, August 06, 2006 08:12 PM
Subject: Re: [TR] Early TR4 - Front Brake Calipers
> On Sunday 06 August 2006 06:47 pm, lbc.resto@comcast.net wrote:
> > I am trying to fit new pistons into new seals.
> >
> > The manual says to:
> > - fit the seal into the bore - done.
> > - fit the dust cover lower edge into the caliper groove - aargh (not
done).
> > - slide the piston through the dust cover and past the bore seal into
the
> > caliper - tried this first and it won't get past the seal even with
liberal
> > amounts of new fluid.
> >
> > What is the trick in getting the dust cover in place and then managing
to
> > keep it there while I try and fight the piston past the seal without
> > damaging it?
> >
> > --
> > Ian
> > 62 TR4
> >
> Ian,
>
> I dont know if this is good advice or not. But when I did my TR4 calipers
last
> year I noticed that the piston would not push past the seal unless I had
the
> seal right side in. This might sound funny and may not be true in all
cases
> but the piston would not push past the seal. So I reversed the seal and
> woosh, it went right in. Keeping the outer dust cover in place while
pushing
> in the piston requires a bit of patience. I used a very smoth flat
> screwdriver to hold the dust cover out and when the piston was in used the
> screwdriver to follow the cover around the piston and into the groove.
Took
> some time but all went together as per spec.
>
> You must get the dust seal in the caliper grove after installing the
piston
> seal before you attempt to push in the piston. Once you get it in the
rubber
> should keep it there while you push the piston past.
>
> Did you make sure the grove in the caliper is clean, free of rust, paint,
> junk?
>
> I also used liberal amts of fluif.
>
> Hope this helps.
>
> Bob
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