Overheating Hubs?

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Drurban
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Overheating Hubs?

Postby Drurban » Mon Jan 17, 2011 3:57 pm

I was wondering if any of you out there have had the issue of overheating hubs?

I have a 1997 Isuzu Mu and my front hubs are hot to touch after a decent drive around town say about an hour's drive.

I have been going out of my mind at what it could be, if any of you lot out there can shed some light on this would be much appreciated.

Ruben
1997 Isuzu Mu, 3.1TD, 5sp Manual.

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mudlva
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Re: Overheating Hubs?

Postby mudlva » Mon Jan 17, 2011 5:38 pm

1 driving habits of long slow braking
2 brake pads rubbing slightly siezed calipers
3 wheel bearings to tight
4 or wheel bearings rusty and becoming seized

jack each wheel spin them and wobble them see what appears as friction etc

thats a start

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Re: Overheating Hubs?

Postby mud_slinger » Mon Jan 17, 2011 6:57 pm

are the hubs free wheeling or are the always locked, as have seen a few isuzu's with a factory option hub that is full time locked.
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Drurban
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Re: Overheating Hubs?

Postby Drurban » Tue Jan 18, 2011 9:36 am

Thanks for your help you guys, I have already ruled out the possibility of what

mudlva said:

1 driving habits of long slow braking
When I corner it heats up the most.
2 brake pads rubbing slightly siezed calipers
I have checked these and found they are not siezed.
3 wheel bearings to tight
I still have to investigate this, as one machine screw was giving me grief.
4 or wheel bearings rusty and becoming seized
I have had the wheel bearing replaced so there is no way they are rusty and have seized.

And what mud_slinger said
are the hubs free wheeling or are the always locked, as have seen a few isuzu's with a factory option hub that is full time locked.
I have had auto hubs but replaced them with manual hubs, so they are not locked.

I have tried different types of manual hubs (Anisin and AVM) for some reason since I put the Anisin hubs on this is when the issues started to happen and I cannot think why, I will swap back to the AVH hubs and see what happens.

Cheers
1997 Isuzu Mu, 3.1TD, 5sp Manual.

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Moriarty
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Re: Overheating Hubs?

Postby Moriarty » Tue Jan 18, 2011 11:39 am

Drurban wrote:Thanks for your help you guys, I have already ruled out the possibility of what

mudlva said:

1 driving habits of long slow braking
When I corner it heats up the most.
2 brake pads rubbing slightly siezed calipers
I have checked these and found they are not siezed.
3 wheel bearings to tight
I still have to investigate this, as one machine screw was giving me grief.
4 or wheel bearings rusty and becoming seized
I have had the wheel bearing replaced so there is no way they are rusty and have seized.

And what mud_slinger said
are the hubs free wheeling or are the always locked, as have seen a few isuzu's with a factory option hub that is full time locked.
I have had auto hubs but replaced them with manual hubs, so they are not locked.

I have tried different types of manual hubs (Anisin and AVM) for some reason since I put the Anisin hubs on this is when the issues started to happen and I cannot think why, I will swap back to the AVH hubs and see what happens.

Cheers


If heating up when cornering, points to badly adjusted wheel brgs. Allowing the wheel to cant on cornering forces, and the disks lean on the pads.

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mudlva
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Re: Overheating Hubs?

Postby mudlva » Tue Jan 18, 2011 2:54 pm

yip what he said

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Drurban
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Re: Overheating Hubs?

Postby Drurban » Wed Jan 19, 2011 9:16 am

Moriarty you have a good point there I have never had thought of that.

This is something that I will need to look into more.

Thanks Moriarty for your suggestion.

Ruben
1997 Isuzu Mu, 3.1TD, 5sp Manual.

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Re: Overheating Hubs?

Postby kbushnz » Wed Jan 19, 2011 9:34 am

I have manual hubs and after a long drive they do get hot.....
You can hold your hand on them....
And heat sink when stopped.
I notice this when I have to click in the hubs.
So if everything is o.k then its normal.

Don't forget there is a huge amount of energy lost to friction and heat when braking.

Calvin
Cheers Calvin
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Moriarty
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Re: Overheating Hubs?

Postby Moriarty » Wed Jan 19, 2011 10:42 am

You DID say that you had new brgs installed? after a shortish run, the will bed correctly, out to their limits, thus inducing a certain slackness in clearance, time to readjust, and your problem SHOULD disappear.

I have exactly the same situation with wheel brgs, the damned thigs are a consumable item when 4wdriving, especially with IFS trucks like mine. Water gets in and that is DOOM for wheel Brgs!!!! I now carry two sets all the time in my garage.

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Drurban
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Re: Overheating Hubs?

Postby Drurban » Wed Jan 19, 2011 12:35 pm

Thanks for your advise Moriarty, I think I will do that with having a set of bearings.

I was just wondering what is past the adjustment collar in the picture below, me being non mechanically
minded.

Image
1997 Isuzu Mu, 3.1TD, 5sp Manual.

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Re: Overheating Hubs?

Postby sibainmud » Wed Jan 19, 2011 1:20 pm

Jez Ruben,
They are a mess. Is that the side with the broken CV?
You may have to go back to the drawing board :?
You have come to the right place for advise from all these great guys.
Cheers,
Simon.
I keep looking for the loose nut behind the wheel, but I can't find it!!

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Drurban
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Re: Overheating Hubs?

Postby Drurban » Wed Jan 19, 2011 1:26 pm

sibainmud wrote:Jez Ruben,
They are a mess. Is that the side with the broken CV?
You may have to go back to the drawing board :?
You have come to the right place for advise from all these great guys.
Cheers,
Simon.


Hey Simon,
Yes broken C.V tip see photo's on club album on F.B, the mess is all the greese which I left in there.

The Impact driver worked a treat to remove shagged screws, need to find some more to replace old ones, any idea where to get some?

Cheers.
1997 Isuzu Mu, 3.1TD, 5sp Manual.

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Re: Overheating Hubs?

Postby sibainmud » Wed Jan 19, 2011 1:31 pm

Any OEM bolt shop should be able to help. You just need a sample with you.
Cheers,
I keep looking for the loose nut behind the wheel, but I can't find it!!

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Drurban
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Re: Overheating Hubs?

Postby Drurban » Wed Jan 19, 2011 1:36 pm

sibainmud wrote:Any OEM bolt shop should be able to help. You just need a sample with you.
Cheers,


Cheers for that, Iam guessing the bearing is behind the adjusting collar?
1997 Isuzu Mu, 3.1TD, 5sp Manual.

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Re: Overheating Hubs?

Postby Moriarty » Wed Jan 19, 2011 3:06 pm

Drurban wrote:
sibainmud wrote:Any OEM bolt shop should be able to help. You just need a sample with you.
Cheers,


Cheers for that, I am guessing the bearing is behind the adjusting collar?



Your guess is spot-on!!

there were three countersunk screws going through that outer lock-ring.
Under the lock-ring, is the bearing keeper. No shims or anything complicated.

If you need a new wheel brg kit at any time, the part number from Superbleep is IF002

before going too far, with the wheel OFF the ground, and grasping the top and bottom of the wheel, can you rock it up and down?

Or use a crowbar under the tyre.

If there IS play, remove the lock-ring, the brg keeper has five holes in it, two are around 7mm dia and the remaining three are threaded for the screws.
using the UNTHREADED holes, and a suitable bar tighten the lock-ring until all discernible play has been removed. (as described above)

replace lock-ring and see which threaded holes line up with any of the holes in that lock-ring. If NONE, tighten the keeper sufficiently to allow the screws to make the holes.

Insert screws and reassemble hubs etc.

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Re: Overheating Hubs?

Postby Drurban » Thu Jan 20, 2011 8:50 am

Moriarty wrote:
Drurban wrote:
sibainmud wrote:Any OEM bolt shop should be able to help. You just need a sample with you.
Cheers,


Cheers for that, I am guessing the bearing is behind the adjusting collar?



Your guess is spot-on!!

there were three countersunk screws going through that outer lock-ring.
Under the lock-ring, is the bearing keeper. No shims or anything complicated.


If you need a new wheel brg kit at any time, the part number from Superbleep is IF002

before going too far, with the wheel OFF the ground, and grasping the top and bottom of the wheel, can you rock it up and down?

Or use a crowbar under the tyre.

If there IS play, remove the lock-ring, the brg keeper has five holes in it, two are around 7mm dia and the remaining three are threaded for the screws.
using the UNTHREADED holes, and a suitable bar tighten the lock-ring until all discernible play has been removed. (as described above)

replace lock-ring and see which threaded holes line up with any of the holes in that lock-ring. If NONE, tighten the keeper sufficiently to allow the screws to make the holes.

Insert screws and reassemble hubs etc.


Thanks Moriarty, you have been a big help and also to the others who have commented, it is always good to hear what others opinion's are.

Cheers Ruben
1997 Isuzu Mu, 3.1TD, 5sp Manual.

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