BigJimnyMeet (North) 2024 (12 Jan 2024)
14th July 2024
Parkwood Nr. Leeds
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Air operated front hubs
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- markyp2000
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- VAXXi
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VAXXi wrote: front remains in the way it was when the vacuum system broke (if they were on, they stay on, if not, not).
So do I just jack it up and see if the front is freewheeling while 4WD is engaged?
I am not too sure I like freewheeling front hubs anyway. I get that it saves fuel but don't we want the drive shafts turning rather than not.
What do I do to engage them permanently??
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- reaper
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With the engine running put in 4wd and you could hear a clak sound as the hubs engade , jack one front wheel up and try to turn it if it spins freely the hubs are not working
Do this both sides as one may be working
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reaper wrote: You dont want them permanently engaged , do not use 4wd unless on loose ground
I'll try the jacking up and see what is happening thanks. I want to see if they are locked with the engine off and 2WD selected.
I must admit I forgot the engine needs to run to provide vacuum.
My argument for having the front hubs engaged is that it keeps the drive train moving up to the transfer box. I wasn't referring to having the 4WD on using the transfer lever.
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- darthloachie
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darthloachie wrote: you're fine with the front locked as long as you are in 2wd on the road
That's what I was suggesting thanks.
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Fixed ones don't need the spacers and came on SJs or Vits and KAP supplied me with new ones. You just have to trim down your front wheel bearing nut's sealing ring that seals the air normally but stops the fixed hubs mounting properly. Unless you want to buy spacers for those of course but it's cheaper to cut them down.
Kirkynut
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kirkynut wrote: Just bin the vacuum ones and get fixed hubs
Kirkynut
You'd have thought the vac ones could be modded to make them permanently fixed. After all the vac must be holding a mechanical part in place somewhere.
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helijohn wrote:
kirkynut wrote: Just bin the vacuum ones and get fixed hubs
Kirkynut
You'd have thought the vac ones could be modded to make them permanently fixed. After all the vac must be holding a mechanical part in place somewhere.
I think they could. The outside ring slides over the inside that goes on the spines of the shaft connecting them both together and is drawn by vacuum not the spring on a manual hub.
I have thought about putting chemical metal between the spines of the inner and outer parts and letting it set with them in the locked position but there is some slack, albeit small between them and I fear the chemical metal will not stand up to the force of the drive in forward and reverse trying to take that slack up that the chemical metal is filling.
If you can weld I suppose you could weld it around the inside edge between the inner and outer parts but you'd have to grind it back and would have minimal weld so I fear the same could happen.
The proof of the pudding is in the eating. Try it and see what happens over time.
Kirkynut
The underdog often starts the fight, and occasionally the upper dog deserves to win - Edgar Watson Howe.
My Jimny Thread Here: www.bigjimny.com/index.php/forum/8-my-ji...on-continues?start=0
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kirkynut wrote:
helijohn wrote:
kirkynut wrote: Just bin the vacuum ones and get fixed hubs
Kirkynut
You'd have thought the vac ones could be modded to make them permanently fixed. After all the vac must be holding a mechanical part in place somewhere.
I think they could. The outside ring slides over the inside that goes on the spines of the shaft connecting them both together and is drawn by vacuum not the spring on a manual hub.
I have thought about putting chemical metal between the spines of the inner and outer parts and letting it set with them in the locked position but there is some slack, albeit small between them and I fear the chemical metal will not stand up to the force of the drive in forward and reverse trying to take that slack up that the chemical metal is filling.
If you can weld I suppose you could weld it around the inside edge between the inner and outer parts but you'd have to grind it back and would have minimal weld so I fear the same could happen.
The proof of the pudding is in the eating. Try it and see what happens over time.
Kirkynut
Well if vacuum can keep them engaged you'd think that a bond of something like you describe would hold. I can and do weld (it's not alway pretty though ). TBH, if it was easy to get at I'd even try a cyano glue if I thought I could get away with it. I hate being dependent on a vacuum system. I realise that replacing them with fixed would be the ideal route but.......................
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