Rear caliper top sliding pin seized

[cla5h]

I've tried to get silicone spray under the edges of the rubber dust covers, hammered both ends of the pin with the caliper off, hammered both inside and outside of caliper when it was bolted back in place, but it won't slide.

Considered pulling off the rubber covers but concerned that they will tear.

Any tips to free it?

[robin]

I think the top rubbers will remove with caution.

This looks OK VFM to recover the caliper, and looks as though you'll get a new pin and new rubbers ...

http://www.eliseparts.com/products/show ... hment-kit/

Cheers,
Robin

[cla5h]

So do you think the existing pin is beyond freeing?

I'm not familiar with what exactly the mechanism is that allows it to slide. If I were to get the refurb kit, how does the old pin come out - what keeps it in place in the caliper?

[robin]

The bolt keeps the pin in the hub; the caliper (when a brake pad is fitted) cannot slide far enough to slide off the pin.

You can attempt to release the rubbers; if they tear, you can buy the kit.

If they release but you cannot remove the pin without using something like vice grips on it and the pin is chewed up, then you can buy the kit.

There is nothing clever about the pin - it really is just a cylinder of metal in a hole in the caliper that should be well enough lubricated to allow the caliper to slide.

Cheers,
Robin

[thinfourth]

Some brake pins have a hex at the top for a spanner

If not its stilson time

[cla5h]

Thanks - Robin's explanation gave me to confidence to apply more brute force.

After repeatedly hammering through first from one side, then the other, I've managed to free it, and only one rubber cover destroyed in the process.

I'll smooth any corrosion off the pin and the channel, order up some new rubbers, and get plenty of grease in there.

[robin]

If the pin is pitted I would be tempted to replace. These things jam at the best of times and cause you to eat inside pad and disk face, costing you two disks and four pads (as you never replace just one side at a time). The full kit of bits is just ~20 odd quid.

But it's your money

Cheers,
Robin

[cla5h]

Hi Robin, I agree it's not worth scrimping, however, the pin looks fine. It's moving quite freely now, so once I get the replacement rubber boot I'll make sure it's well greased and just keep on top of it whenever I'm checking the pads or discs.

Thanks for the advice.