Hi,
I once had to remove a stuck piston from a caliper on a
'70's Barracuda. Seem's the owner had run the pads down to
metal and then taken it to the service station (remember those?)
The service station had taken the old pads out and attempted to
retract the piston using screwdrivers. Wouldn't budge. They
came to the parts store I was working at and bought a
piston pusher from me. This is a X-type tool that you put between
the pads in the caliper and screw the handle in and it pushes
the piston in. Well, about an half hour later they bring the
tool back all bent to hell. Said it didn't work. I told them that I
would come over after work and see what the problem was.
When I got there I took a look the caliper. I could see that the
piston was cocked in the bore of the caliper. The piston had
come out so far when the pads wore to metal that the piston
cocked. I tried the trick with high pressure air, with no success.
I finally adapted a grease fitting to the hose connection on the
caliper and used the station's high pressure grease gun.
The piston just oozed right out. Had to sell them a new piston
as the old one had great dings from being cocked.
Was a messy cleaning job for them afterwards, but far cheaper
than a new caliper.
Sorry to ramble on like this, but thought it might be helpful.
Al Brenden
albrendn@premier1.net
----------
> From: Eric Straub <ericst@MICROSOFT.com>
> To: 'ngaard@ibm.net'; 'andertonm@juno.com'
> Cc: 'triumphs@autox.team.net'
> Subject: RE: Frozen calipers...
> Date: Tuesday, December 31, 1996 12:29 PM
>
> I had a similar problem (except mine had sat for 5 years). Here's how I
> got them out (thanks to Mark Pelam @ vtr for this tip):
>
> 1) Set a 2x4 on the ground.
> 2) Hold the caliper in your hand so the piston you want out will extract
> down when it comes.
> 3) Smack the side of the caliper opposite the piston hard against the
2x4.
> It will take several hits, but it should slowly edge out. Mine were
frozen
> solid & the came out with about 10 hits.
>
> Good luck!
>
> ----------
> From: andertonm@juno.com [SMTP:andertonm@juno.com]
> Sent: Monday, December 30, 1996 6:14 PM
> To: ngaard@ibm.net
> Cc: triumphs@autox.team.net
> Subject: Re: Frozen calipers...
>
>
> On Mon, 30 Dec 1996 03:39:34 +0100 Michael Noerregaard <ngaard@ibm.net>
> writes:
> >Dear fellow scion,
> >
> >My brother-in-law-to-be's Spit has a problem - namely the calipers.
> >They
> >have been sitting on his work-bench for three years - and are frozen
> >up
> >solid. I have tried getting the pistons out with air-pressure (and a
> >considerably higher pressure than the 'gentle' pressure prescribed in
> >the
> >Haynes manual) - but no luck. The pistons on my TR6 have a small
> >collar on
> >them so I got those out by 'gentle' use of a hammer and a screwdriver,
> >but
> >no such collar on these. So...what is the wisdom on the list on this
> >matter? Can I soak them in something? And what should that something
> >be?
> >
> >Thanks a bunch - and best wishes for y'all for the New Year,
> >
> >Michael
> >
> >
> I had good luck putting a screw type hose clamp around the top edge of
> the piston. You can then use screwdrivers on each side to carefully pry
> the piston out of the cylinder. Of course, you must make sure you don't
> damage the piston in the process.
>
> Mark Anderton
>
> 1972 Triumph TR6 (daily driver)
> 1984 Jaguar XJ6 (2 ea - some people never learn)
> 1966 Morris Minor (everything a car should be)
> 1971 Land Rover
> 1967 Daimler V8 Saloon
> 1958 Velocette MSS (500cc single)
>
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