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oz
Moderator
| Joined: | Wednesday January 31st, 2007 |
| Location: | Livingston |
| Posts: | 67 |
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Posted: Thursday January 31st, 2008 08:45 pm |
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Was wondering if anyone had any tips on how to replace the seals in the calipers?
Well, actually how to remove the pistons, so I can replace the seals.
HBOL doesn't really give much help when it comes to removing the pistons, but I'm guessing attempting to split them is a bad idea.
I seem to recall one of the Mini mags done a tech artical on it, does suppose anyone could scan it for me??
Oz
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Graham Bichard
Member
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Posted: Friday February 1st, 2008 07:36 am |
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Oz, I can only comment on my experience with bike calipers. Am I right in thinking you're trying to get the piston out without splitting the caliper?
On the bike as I remember I HAD to split the caliper to rebuild them properly. In the caliper rebuild kit there was an O ring for each of the galleries leading from one side to the other. It was then reasonably easy to get the pistons out (these were chrome plated so quite a hard covering to the pistons, although its still worth being careful!) - I can't quite remember what I used, Pipe wrench perhaps to twist and pull!
I don't know if a mini caliper is that different - hope this helps?
Last edited on Friday February 1st, 2008 07:36 am by Graham Bichard |
taffy1967
Member
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Posted: Friday February 1st, 2008 03:08 pm |
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I'm sure I've heard that someone recommended using a foot pump to pop the pistons out?
Put something like a piece of wood in place so the calliper doesn't fly right out and catch your hand or something, but inapparently it does work.
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oz
Moderator
| Joined: | Wednesday January 31st, 2007 |
| Location: | Livingston |
| Posts: | 67 |
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Posted: Friday February 1st, 2008 06:50 pm |
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Cheers Graham, cheers Taff.
Ideally I'd like not to split the caliper, I'll give the foot pump idea a go and worse case I'll split it.
Thanx for the replies.
Last edited on Saturday February 2nd, 2008 02:40 pm by oz |
taffy1967
Member
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Posted: Friday February 1st, 2008 11:32 pm |
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| You won't need to split it with the foot pump method. Just stop the pistons popping right out before you remove them by hand.
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oz
Moderator
| Joined: | Wednesday January 31st, 2007 |
| Location: | Livingston |
| Posts: | 67 |
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Posted: Saturday February 2nd, 2008 02:43 pm |
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Cool. That should save some time and hassle.
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Itsarek
Member
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Posted: Saturday February 2nd, 2008 04:13 pm |
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oz wrote: Cool. That should save some time and hassle.
Hi! 
It just makes it more difficult to replace the dust seals 
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Andrew1967
MCR Member
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Posted: Saturday February 2nd, 2008 04:44 pm |
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I've read somewhere that you should never split the caliper.
Pistons can be removed by the careful use of an airline so I guess a footpump would also do the trick. One piston should be removed at a time and clamp the other one.
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hawaiianblue
Member
| Joined: | Saturday June 2nd, 2007 |
| Location: | |
| Posts: | 214 |
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Posted: Saturday February 2nd, 2008 06:07 pm |
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Splitting the caliper is ok so long as you use new gaskets when you rebuild them and re-tighten the bolts to the specified torque.
Popping the pistons out using the above methods is easier though.
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oz
Moderator
| Joined: | Wednesday January 31st, 2007 |
| Location: | Livingston |
| Posts: | 67 |
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Posted: Sunday February 3rd, 2008 06:31 pm |
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Thanx for all the replies.
Don't think I'll bother with spliting the caliper, sounds easier to use a foot pump.
Cool.
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