658 Front floating caliper. Not floating...

Smythson

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Easter greetings!

Just changing front pads and found that the caliper is no longer floating. The piece that connects the caliper to the fork (caliper bracket?) is only connected in one place - the top floating pin (there is a second lower one however this is merely a pin with rubber cover so zero chance of sticking)

My question is - can this be hammered through or will this just bend the slider? Also heating - i'm presuming the assembly is fairly heatproof by the nature of what it does, would this help?

Any advice would be gratefully received,

S
 
tosh23 said:
I cant picture what you mean, ... 1 disc.. 1 caliper..2 pistons..2 bolt carriers..2 rubber boots..
Click to expand...

Ahh... I think they would best be described as bolt carriers then!

http://www.lingshondaparts.com/hond...ck_01=13MAKVS1&block_02=F__0900&block_03=4652

In this diagram (Honda but still Brembo) the pin which is stuck is unfortunately not named however it's the pin directly above the number 6 and it's stuck in the bracket on the left next to the number 7.

Hope this makes it a bit clearer,

S
 
Sounds like one of your caliper floating pins is seized up ...
I had a seized rear caliper, it was solid, ended up heating it up and then knocking seven bells out of it in a vice. I replaced the caliper.
I now inspect & lube up the pin & recess on all three caliper's regularly...
Check that your pads are worn evenly on both sides, if it's been seized for a while, you will have lost the self centering 'floating' action and maybe one pad will have been doing all the work:)
 
Spot on about the one pad. For the sake of a few hundred quid I'm gonna try heat then chemical bath - if that works then at least I'll only have to replace the rubbers (which are still 20 quid! )

S
 
I had this on my XChallenge recently. We had no option but to gradually hit it harder with heavier things :D Hit the bracket side and not the caliper. Make sure you know which way it separates because on the XCh one pin was fixed to the caliper and the other was fixed to the bracket. You will doubt your sanity but it will eventually go ...
 
Gaz said:
I had this on my XChallenge recently. We had no option but to gradually hit it harder with heavier things :D Hit the bracket side and not the caliper. Make sure you know which way it separates because on the XCh one pin was fixed to the caliper and the other was fixed to the bracket. You will doubt your sanity but it will eventually go ...
Click to expand...

Good to know. I've seen the diagrams so know what the pin is attached to. Right now it's getting regular squirts of GT85 under the rubber pin cover and i'm designing a jig so hopefully the force of the hammering won't bend the pin.

I guess it'll learn me proper for not taking enough of the thing! :blast
 
hang on, ive seen a vid on this ... let me find it....

Now, 4 minutes into the vid he drills a hole for a "blind" calliper pin... I was thinking of the same to a floating pin.. would this work, could this work ?? Its worth a little thinking time, ....where is that can of beer.... Tosh

http://www.youtube.com/watch?v=SbP0Iqky7eU
 
The pin that goes through no7 defiantly should be attached to the calliper housing NOT the carrier ... Just to confirm that for ya,,,Also the callipers that he is working on are Suzuki bandit
 
tosh23 said:
hang on, ive seen a vid on this ... let me find it....

Now, 4 minutes into the vid he drills a hole for a "blind" calliper pin... I was thinking of the same to a floating pin.. would this work, could this work ?? Its worth a little thinking time, ....where is that can of beer.... Tosh

http://www.youtube.com/watch?v=SbP0Iqky7eU
Click to expand...

tosh23 said:
The pin that goes through no7 defiantly should be attached to the calliper housing NOT the carrier ... Just to confirm that for ya,,,Also the callipers that he is working on are Suzuki bandit
Click to expand...

Thank you for the video - a nice solution to what i imagine is a fairly frequent problem. With the force i'm putting through the unit at the moment (to no avail :blast) i fear i'd drill a hole and whatever i put in there to use a draft would simply bend (it really is that stuck). However, if my planned attacks fail i will be drilling - if it works figure i can always get a blanking cap to fill the hole and maintain the grease inside the pin housing. :beerjug:

And i broke out the Haines so i got pics of what it should like when separated. It'll be in the freezer overnight then oven tomorrow with some more GT85 in between. After that the rubber sheath is getting cut off and the top section will be bathed in rust remover... roll on the weekend!
 
Mine was the same.

I undid the pin that was free which with a bit of leverage allowed me to rotste bsvk and forwards the other part. This plus plenty of plus gas got it freed off.

Tom
 
Free at last!

Morning all,

The heating / freezing routine didn't do much and i don't have any tools or machines for pulling apart so...

20130406_102236.jpg


Basically the orange straps were holding down the main of the caliper and the blue lifting the caliper bracket. The straps meant there was room to move a little whilst keeping the force on because i was worried about bending the pin. Should any of you face such a quandary in the future the lower pin has a rubber sheath that can be extracted by simply pulling the end of it through the caliper bracket. Albeit this offers no movement along the axis of the top pin it gives some movement around - eventually allowing the bracket to work free.

Motorworks want £23 for the rubber seals (the top one was basically destroyed by my hamfistedness :blast) I'll be calling round tomorrow to see if i can find cheaper anywhere else and post results.

Hope you're all making the most of the weather :tarka
 
Ha! I'll be ordering tomorrow and i'm sure they'll be fine. I've been doing some digging and found this site -

http://www.ebcbrakesdirect.com/sear...hh&v1=car&t1&gclid=CNWCuIqIubYCFVDMtAodygwAmA

...where it's suggested the pads (so i assume same calipers even if they use slightly different brackets?) also fit some Aprilia, Moto Guzzi, Triumph and Yamaha bikes. Interestingly also BMWs from 1993! And the link i found above was for a Honda... so methinks this is fairly common caliper...

So tomorrow I'll also begin the arduous task of trying to get info from Brembo themselves to see just how many bikes this caliper is used on...

S
 
Nippy Normans supply Touratech, Wunderlich, Desert Fox and many other makes of accessories.
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