Magnetic braking system

I would start by backing off the brake adjustment. Look in Hints and Tips on how to do it.

We've done all that Ern, thanks for the reply

Hi Sharon and Ian,

T'was wondering if the castle nut on the bearings was put on too tight.

Cheers

Sharon

Thanks for these replies, but we have these wheels off seems like a thousand times and have done all that is suggested here. Have spoken to electric brake people which seems to be a problem with the magnetics. Have bought new magnets which work the brake bands which will try before going to an autolekkie.

hi guys
we had a similar problem if you look at post 8395 on the owners forum it will explain our situation
if you want to discuss it send me a member message or give me a call
cheers

Hi Sharon & Ian
Have you sorted out your problem with the hub?
I have 1hub that is hotter than the rest as well. Done all the stuff you have done but still is hotter than the rest.
I think I have taken out a good set of bearings and replaced them for no reason.
Also surprised to find that BT are not using offroad brakes.


Cheers

Thanks for the reply.
We still have the standard brakes that come with BT, however the bands were replaced with the same bands, even though the previous bands were down to 50%. The same wheels were running hot with these bands. The heat of the wheels now is such that you cannot touch the hub.
. We have adjusted the right hand rear brakes right off to minimise the overheating problem we have on that wheel. Prior to doing this we had slight scuffing on that brake system, which appeared to be creating the overheating problem, even though the other brakes were adjusted the same.
We have also replaced the electromagnetic brake actuators on the brake system, which has eliminated the problem on the left hand front axle, but not the right hand rear axle. The same wheel seems to be scuffing a bit, maybe causing the overheating problem.
We have also backed off the manual handbrake system to ensure this is not causing the problem. We have been told by knowledgable folk that this can be a common problem, and they need a settling in time. We are heading to the isa tomorrow, so hopefully all has been fixed. We will soon see. Will keep you all posted.

All we can say is that the bearings were packed with a bearing packer to the max.
By hot we ar referring to the drum wearing onto the band.
Wheel alignment has been done and would not cause it.
Hand brake has been done as you have just said..
Thanks so much for your reply.

Hi Sharon & Ian
Hope you have a good trip,to the Isa. Could be a little hot!
One thing I found on the wheel that is hotter than the rest is you seem to have to tighten the axle nut up more than the rest to take out the sideways movement in the bearings.
When you put the outer bearing on the axle it seems to have some play between the bearing and the axle as if the axle have been machined slightly under size.
The bearing I threw away thinking it was damaged because it had been spinning on the axle not because there was a mark on the axle but there was wear on the washer between the bearing and nut.
If the axle has been machined too small and you have to tighten the axle nut up tighter than the rest to take out the sideways movement this could be the reason.
What do others think?

Laurie

Just on the outskirts of the Isa with no overheating hub problems.
The affected wheels remain a tad warm, seem to have settled in with the distance covered. Thank-you everyone for your suggestions. We think that the shaping of the new brake-bands wearing into shape and the replacement of the magnetic actuators was the solution to our problems.