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Reversing my calipers - do they work the same in reverse ??

Posted: Mon Apr 23, 2007 12:33 pm
by BrettInUte
Currently fitting a set of EL falcon rear discs + calipers to a 2wd buggy.
top speed around 200kph

Due to clearance + bleeding issues - I was planning to swap the calipers LHS one (from the front of the disc- 2oclock) to the RHS (rear of the disc - 10 oclock).

But will this work the same ??- as the disc is now spinning the reverse way thru the calipers. I realise at slow speeds it wont make any difference - but is there any angles build into the calipers that make them work better with the disk running fwds rather than backwards ??

thanks for any advice.

Posted: Mon Apr 23, 2007 3:32 pm
by MART
So you want to swap your rear calipers from the front of the rear diff , to the rear of the rear diff. If that is correct just swap the left to the right and the right to the left and mount them on the back of the diff. Swapping them will leave the bleeder nipples on the top , so you shouldn't have any issues with direction and do they have a handbrake mechanism on them as well or have they removed it by that model , cheers Paul.


These are zj rear falcon calipers , with handbrake mechanism


Image

Posted: Mon Apr 23, 2007 4:04 pm
by KiwiBacon
If the pistons are offset, then you'll have pad wear issues.

On some calipers the pistons are offset to the front of the pad, the turning disc tries to rotate the pad forward, evening out the pressure and wear.

If you run such a caliper backwards then your pads will wear wedgeshaped.
If your calipers don't have offset pistons, then ignore this post.

Posted: Mon Apr 23, 2007 4:08 pm
by MART
My calipers have the piston in the centre , Cheers Paul.

Posted: Mon Apr 23, 2007 4:10 pm
by mattsluxtruck
What is that rear disc brake set up mart? Any chance of more information. It looks really really good.

Posted: Mon Apr 23, 2007 5:28 pm
by Ruffy
As long as your bleeder remains at the top. Falcon rears wont have an issue working in either direction.

Posted: Mon Apr 23, 2007 5:30 pm
by MART
I take it by your user name you have a hilux. It is a front rodeo rotor , with a zj falcon rear caliper. The plate which holds it on is 15.5mm steel with 2 steps of 4mm machined into it.

There are a few measurements missing , you need to measure your caliper.

Image

These are my old ones , they were welded and they must be one piece , so I had to make new one's.

Image


I used a 100mm holesaw first to cut the step , once done I bored a 83 mm holesaw through the same centre hole. I clamped a piece of metal on the end where the half moon is an used an 83mm holesaw to cut the half moon aswell. The plate was machined , stepped by Glen Dobbin and the plate tapped 12mm to bolt calipers on. Used cutting oil from a sprinkler screwing machine to lubricate the holesaws. The mounting bolts are 10 x 40 high tensile bolts with nyloc nuts , The new brackets are thicker and wider steel , Cheers Paul

Posted: Tue Apr 24, 2007 12:28 pm
by BrettInUte
Thanks guys.

Yes this is on the rear wheels.

I believe the piston is in the center on the calipers - so I shold be right.

Swapping L -> R and front to back - keeps the bleeders at the top.


thanks for the help...