Shimano XT Disc - pistons sticking

Dave said:

I have a new pair of XT Disc brakes. By mistake I pumped
the lever while the wheel was off the bike and now the
pistons stick a bit. I tried pushing them back in the bore
with the end of a 10 mil wrench but they they don't
retract all the way after the lever is squeezed now. Plus
I lost a lot of my lever throw.

I heard you can pump them out a bit, put a drop of mineral
oil on each one, push 'em back in and it should fix the
problem. Can anyone verify this before I start looking
around for where to buy some Shimano Mineral Oil ? Any
other fixes for this prob?

Thanks in advance...Dave

You're going to have to be very careful with the oil, but I
don't think it'll work. You can use any mineral oil. It
doesn't have to be Shimano. I think you will probably need
to bleed the brakes though.

--
o-o-o-o Ride-A-Lot o-o-o-o
www.schnauzers.ws

Dave said:

I have a new pair of XT Disc brakes. By mistake I pumped
the lever while the wheel was off the bike and now the
pistons stick a bit. I tried pushing them back in the bore
with the end of a 10 mil wrench but they they don't
retract all the way after the lever is squeezed now. Plus
I lost a lot of my lever throw.

I heard you can pump them out a bit, put a drop of mineral
oil on each one, push 'em back in and it should fix the
problem. Can anyone verify this before I start looking
around for where to buy some Shimano Mineral Oil ? Any
other fixes for this prob?

Thanks in advance...Dave

I always use a kitchen knife when I need to push them back
in. That way I can push evenly both from above and below
and don't have to worry about scraping them. Be really
careful with oil of any kind as it will ruin the pads if
spread to them.

--
Perre

You have to be smarter than a robot to reply.

Quoted message said:

Be really careful with oil of any kind as it will ruin the
pads if spread to them.

No, it won't. You can burn off impurities that get into the
pad with a stove or a blowtorch.

--
Phil, Squid-in-Training

ZeeExSixAre said:

Quoted message said:

Be really careful with oil of any kind as it will ruin
the pads if spread to them.

No, it won't. You can burn off impurities that get into
the pad with a stove or a blowtorch.

I've never tried it. But I have heard both success and
disaster stories about blowtorches and such. I'd still be
real careful.

--
Perre

You have to be smarter than a robot to reply.

Per Elmsäter said:

ZeeExSixAre said:

Quoted message said:

Be really careful with oil of any kind as it will ruin
the pads if spread to them.

No, it won't. You can burn off impurities that get into
the pad with a stove or a blowtorch.

I've never tried it. But I have heard both success and
disaster stories about blowtorches and such. I'd still be
real careful.

Although my experience is limited to Avid Mechs and
Hayes pads, in all the three cases where I've burned off
the pads (using a stove), normal to extraordinary
performance returned.

--
Phil, Squid-in-Training

"ZeeExSixAre" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Per Elmsäter said:

ZeeExSixAre said:

> Be really careful with oil of any kind as it will ruin
> the pads if spread to them.

No, it won't. You can burn off impurities that get into
the pad with a stove or a blowtorch.

I've never tried it. But I have heard both success and
disaster stories about blowtorches and such. I'd still
be real careful.

Although my experience is limited to Avid Mechs and Hayes
pads, in all the three cases where I've burned off the
pads (using a stove), normal to extraordinary performance
returned.

Same here with Hope mini. Full performance returned, for 5
minutes, until the pad material ripped itself off the pad
plate. Seems the glue doesn't like to get that hot, so, be
careful if going this route.

Shaun aRe

"Shaun Rimmer" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

"ZeeExSixAre" <[email hidden]> wrote
in message "]news:[email hidden]...

Quoted message said:

Per Elmsäter said:

ZeeExSixAre wrote:
>> Be really careful with oil of any kind as it will
>> ruin the pads if spread to them.
>
> No, it won't. You can burn off impurities that get
> into the pad with a stove or a blowtorch.

I've never tried it. But I have heard both success and
disaster stories about blowtorches and such. I'd still
be real careful.

Although my experience is limited to Avid Mechs and
Hayes pads, in all

the

Quoted message said:

Quoted message said:

three cases where I've burned off the pads (using a
stove), normal to extraordinary performance returned.

Same here with Hope mini. Full performance returned, for 5
minutes, until the pad material ripped itself off the pad
plate. Seems the glue doesn't like to get that hot, so, be
careful if going this route.

No problem here with both XTR and XT pads. The glue's
holding after several cookings, but I admit I was concerned
about this.

Dave

"Pistof" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

"Shaun Rimmer" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

"ZeeExSixAre" <[email hidden]>
wrote in message
"]news:[email hidden]...

Quoted message said:

Per Elmsäter wrote:
> ZeeExSixAre wrote:
>>> Be really careful with oil of any kind as it will
>>> ruin the pads if spread to them.
>>
>> No, it won't. You can burn off impurities that get
>> into the pad

with

Quoted message said:

Quoted message said:

Quoted message said:

>> a stove or a blowtorch.
>
> I've never tried it. But I have heard both success
> and disaster stories about blowtorches and such. I'd
> still be real careful.

Although my experience is limited to Avid Mechs and
Hayes pads, in all

the

Quoted message said:

Quoted message said:

three cases where I've burned off the pads (using a
stove), normal to extraordinary performance returned.

Same here with Hope mini. Full performance returned, for
5 minutes,

until

Quoted message said:

Quoted message said:

the pad material ripped itself off the pad plate. Seems
the glue doesn't like to get that hot, so, be careful if
going this route.

No problem here with both XTR and XT pads. The glue's
holding after

several

Quoted message said:

cookings, but I admit I was concerned about this.

Good for you dude! I was lucky, in that I was riding in
front of the house trying to bed the pads back in when it
happened, and not braking for a corner on a fast DH...still
made me nervous though...

Shaun aRe

Quoted message said:

Quoted message said:

Although my experience is limited to Avid Mechs and
Hayes pads, in all the three cases where I've burned off
the pads (using a stove), normal to extraordinary
performance returned.

Same here with Hope mini. Full performance returned, for 5
minutes, until the pad material ripped itself off the pad
plate. Seems the glue doesn't like to get that hot, so, be
careful if going this route.

Shaun aRe

May I just say you people are CHEAP 🙂 Burning them does
work, trying to clean then with a solvent is another story.
Whatever glue holds them together breaks down and then you
get an apple brown betty crumble brake pad.
--
_________________________
Chris Phillipo - Cape Breton, Nova Scotia ramsays-ramsays-Open ↗
online.com

"Chris Phillipo" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Quoted message said:

Quoted message said:

Although my experience is limited to Avid Mechs and
Hayes pads, in all

the

Quoted message said:

Quoted message said:

Quoted message said:

three cases where I've burned off the pads (using a
stove), normal to extraordinary performance returned.

Same here with Hope mini. Full performance returned, for
5 minutes,

until

Quoted message said:

Quoted message said:

the pad material ripped itself off the pad plate. Seems
the glue doesn't like to get that hot, so, be careful if
going this route.

Shaun aRe

May I just say you people are CHEAP 🙂

Hey silly - y'all misspelled 'poor'! ',;~}~

Shaun aRe