Shimano Disc Brake Caliper Setting

[Jamm]

A Mate of mine just bought a Scott Aspect 20 MTB. Everything pretty much set up except the Front Disc Caliper. (Shimano Deore B486)

 

Him being a cycling newbie and me being a Roadie, I need some guidance as to how to space the pads to allow the rotor to fit correctly inbetween the pads and to ensure no rub.

 

Currently the pads are pretty much closed and cannot fit over the rotor to allow the wheel to be fitted to the fork. I assume the pistons are forcing them shut. How do I open them up? There are 2 bolts and a pin. There is Mineral Oil and I guess the brakes been pre-bled.

 

[Headshot]

This happens when the brake lever is pulled with the wheel off the bike. Remedy is simple - gently prize the pads apart with a screwdriver - this should push the pistons back into the calipers a bit and you should be able to refit the wheel. No need to do anything else...

[Capricorn]

 

stick in the old pads, and prise the pistons back with a flat screw driver as headshot recommended. Just ensure the pistons are really as far back as you can get them. Only requires a millimeter or less for the pads or disc not to fit.

 

 

 

kinda wish a cam-profiled-like tool was available to do this job conveniently

Capricorn2010-03-22 18:21:33

[Jamm]

Thanks -  Sorted

Mate admitted that he was yanking the brakes with the wheel off... Next time he will get a klap with a spanner. 

[Frosty]

Next time he will get a klap with a spanner. 

An Isuzu 2.8 litre turbo diesel bakkie wheel spanner...

 

 

A Freestate "Boer" walks into the local bar he frequents, and to his
surprise sees a little Japanese man sitting on the chair he
always occupies.
"You is sitting op my stoel," he shouts.
In a split second the Jap is up and knocks the farmer flying,
after a few minutes the farmer regains consciousness and asks "What de

blerry hell was that?"
"Zat martial art from my country Japan" replies the Jap as he
walks out.

The next week the farmer returns and again sees the same little
Jap sitting in "his" chair.
Enraged he shouts: "You is alweer sitting on my blerrie stoel"
Before anyone can blink, the Jap is up and again knocks him out.
As he wakes up he again asks "What was that?"
"Zat, karate from my country Japan" replies our junior ninja.

The following week the farmer comes prepared and, true to form,
the Jap is occupying the same chair as before.
"So, You is sitting so wragtig alweer op my stoel, VAT SO!" says
the farmer and knocks the Jap out with one blow. When he regains
consciousness the little Jap asks:
"What was that?"
"That, my china, was an Isuzu 2.8 litre turbo diesel bakkie
wheel spanner... also from your country, Japan."