Shimano brake caliper, leaking seals

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The Rookie
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Shimano brake caliper, leaking seals

Postby The Rookie » Sun Nov 18, 2012 09:54 am

The daughters rear brake caliper (M765 XT) has just started leaking from the piston seals, any suggestions other than getting a new caliper?

ricardo_smooth
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Re: Shimano brake caliper, leaking seals

Postby ricardo_smooth » Sun Nov 18, 2012 10:22 am

new seals!

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Re: Shimano brake caliper, leaking seals

Postby The Rookie » Sun Nov 18, 2012 10:50 am

Link to manual and seals..... Shimano are not dismantleable from my previous enquiry.......

Chunkers1980
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Re: Shimano brake caliper, leaking seals

Postby Chunkers1980 » Sun Nov 18, 2012 10:54 am

What?

ricardo_smooth
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Re: Shimano brake caliper, leaking seals

Postby ricardo_smooth » Sun Nov 18, 2012 12:46 pm

That are.....just not by you. Usually lbs have to order the bits. Or try somewhere like ukbikestore.

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Re: Shimano brake caliper, leaking seals

Postby The Rookie » Sun Nov 18, 2012 13:13 pm

OK, when I enquirer before, everyone was adamant they were not seviceable and that it was just a whole caliper swap, will ask the LBS but a used caliper may well be cheaper!

ricardo_smooth
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Re: Shimano brake caliper, leaking seals

Postby ricardo_smooth » Sun Nov 18, 2012 14:44 pm

The service parts for shimano are much harder to come by, but some lbs's can get them and you may well find 2nd hand is a cheaper option. So you're not completely wrong in your thinking.

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Re: Shimano brake caliper, leaking seals

Postby The Rookie » Sun Nov 18, 2012 14:56 pm

The Shimano tech docs don't cover caliper breakdown or PN's or anything - new caliper it is, especially as I've also found one piston is seized (and it's the blind side one, not where the acess port is).

ricardo_smooth
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Re: Shimano brake caliper, leaking seals

Postby ricardo_smooth » Sun Nov 18, 2012 15:10 pm

Not worth messing around with then tbh (as you rightly say). Possibly a good time to upgrade to the newer style shimano brakes, depending on what you want/have to spend

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Re: Shimano brake caliper, leaking seals

Postby The Rookie » Sun Nov 18, 2012 21:56 pm

The Daughters a student and we're already putting new forks on it, so I'll just get a Shimano caliper that fits and plug and play it.......

mister p
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Re: Shimano brake caliper, leaking seals

Postby mister p » Tue Nov 20, 2012 12:02 pm

ricardo_smooth wrote:That are.....just not by you. Usually lbs have to order the bits

The service parts for shimano are much harder to come by, but some lbs's can get them


Not as far as I know, and I have a pretty good idea of what spares are available for Shimano components,

It is new calliper time I am afraid. The M765 was on a banjo fitting so you may need a new hose too. Personally I would go for a Deore M596 calliper which has a straight in fitting and then buy a 8H2 9801 which is a straight connector kit. Chop the banjo off existing hose, slip the bolt and olive on, pop the insert in and attach to the calliper.

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Re: Shimano brake caliper, leaking seals

Postby The Rookie » Tue Nov 20, 2012 13:54 pm

Thanks Mister P.
Trying to get some XT/R calipers if I can as the frame uses a pass through hose and if we cut the Banjo off it's an expence to put one back on later, plus it keeps shortening the hose!

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Re: Shimano brake caliper, leaking seals

Postby mister p » Tue Nov 20, 2012 14:12 pm

The other option is to keep the existing hose, buy a current XTR / XT / SLX calliper and a new longer banjo bolt (part number 8JA 9803) to fit it. This way you get the newest calliper with the ceramic pistons and newest pad shape but don't have to shorten the hose.

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Re: Shimano brake caliper, leaking seals

Postby The Rookie » Tue Nov 20, 2012 14:29 pm

LOL I would do but the daughter is a student, so that's not going to happen!

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Re: Shimano brake caliper, leaking seals

Postby mister p » Tue Nov 20, 2012 14:40 pm

£33 for SLX calliper, banjo bolt and pads which will work with your exisiting hose. Even within student budgets?



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