Replacing brake slider pins on Aisin calipers

Got issues with a sticking caliper on my 06.
This is a job I tackled about 10 years ago on another Jimny I had, and can't really remember the job.

Can anyone refresh my memory on any issues with this job?
I'm hoping I can do this, with the brakes still attached to the vehicle, rather than completely removing calipers.

I also remember the seals being quite tricky to fit on the pins. 

Is there a guide to doing this job anywhere?

Many thanks, Rob

Hi,

I put new brake pads and discs on a couple of weeks ago and the sliders were stuck, more so on the drivers side.

I think you will need to take the callipers off to get the pins out, but this is straight forward, you only need to take the two small bolts out of the centre of the pins and don’t need to take the calliper bracket off, which is in tight.

I had to tap the pins out of mine with a drift and small hammer. Then just clean them up and put back with some silicone grease or special rubber safe grease.

There is a couple of guides in the wiki.

Robin

Cheers
I was hoping to be able to leave the brake lines attached, to save bleeding. I' guess I'll have to see how it goes.

I think the last time I did the job, I fully rebuilt the calipers with new pistons and seals, so had them on the bench

You don't need to remove the caliper if luck is with you.
Undo the two bolts that fix the caliper to the caliper carriage, these bolts actually go into the sliders. Lift the caliper up off the disk and change the slider pins and rubber seals. It's just the same amount of taking apart required to change the pads. One of mine was very stuck, but application of heat to the caliper got it moving eventually. Sure the rubber pin seal melted, but too much mass in the piston to cause damage.
Did mine last year and fitted new pins and slider "bellow" seals. The new set of bellows was easier to fit than the originals, they appeared to have improved the design to aid installation.

If you are lucky then one trick is to use each slide bolt in turn to anchor that slide to the carrier so that with the caliper swung up clear of the disc you can apply some body weight to getting the slide moving then repeat for the other slide. It's not a guarantee but if they are only mildly stuck it's a good way of not having to beat things with hammers unnecessarily. It does help if you have the upper body strength of an orangutan.

A very common cause of the caliper slider sticking is that the rubber boot has expanded jamming the slider. They expand if they have come in contact with oil based grease. If the boots are hard to fit it is likely they have expanded, new boots are therefore easier to fit. Always use a non mineral based lubricant such as red rubber grease

robs5230 wrote:

Cheers
I was hoping to be able to leave the brake lines attached, to save bleeding. I' guess I'll have to see how it goes.

I think the last time I did the job, I fully rebuilt the calipers with new pistons and seals, so had them on the bench

i didn’t disconnect the brake line, just swung them up and rested on the hub or calliper bracket.  Then holding the calliper and drift in one hand gently tapped the pins out with a small hammer.  

Robin