Cinquecento rear hub/bearing replacement

How to remove and refit rear hub/bearing assembly

Takes about 30mins, you will need a good jack, wheelbrace, breaker bar with 30mm socket, 12mm spanner, mug of tea. No swear words needed for this job, its simple!! Oh yes, a new bearing/hub assembly!!! [if you are replacing]

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The offending wheel, round, and loose.

Jack up the rear arm, remove wheel.

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Remove dust cap covering the nut, release the staking from the nut to allow it to turn. I left the drum bolt/pin attached to the hub at this point, I was told removal would be easier with the lack of a puller [which wasnt needed!]

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Pull drum/hub off the stub axle, mine just slipped off easily.

Then I removed the pin and bolt, to seperate hub from drum.

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Hubs old and new, worth checking at this point they are both exactly the same

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Refit new hub to stub axle, replace the large washer, I had to reuse the old nut - which upon inspection was sound, due to the new nut having too large a thread.

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Torque up the nut to 225Nm [or as specified], caution - its blimmin tight!! be careful.

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Replace drum, screw back in the pin and bolt to secure.

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Replace the dust cap

Apply handbrake and refit wheel

JOB DONE!!

Overview: Really simple job, no hub puller needed, if you made a hot cup of tea at job start, it will now be ready to drink, job only takes a few mins. I dont have any problems with my handbrake cross levers [or whatever they are called, the things that sieze up], but I squirted it with some WD40 while the drum was off.

DIY RATING: You granny could do this job.

Thanks for viewing!

Levemir

levemir · 14-03-2007

NO EDIT BUTTON!! ?

You granny could do this job, but cracking the hub nut loose might give her a hernia!!

**custard** · 14-03-2007

if you need to edit,pm me the details and i will edit accordingly

falloutdom · 17-03-2007

i need to change the back plate on mine but i cant get the soddin 30 mm nut off i hav jumped on it and everthin with a bar
i done one side but the other side dont seem to wna turn
any ideas???

thanx

levemir · 17-03-2007

Originally Posted by falloutdom

i need to change the back plate on mine but i cant get the soddin 30 mm nut off i hav jumped on it and everthin with a bar
i done one side but the other side dont seem to wna turn
any ideas???

thanx

use a long bar [something like a 4 foot length of scaffold] over a 1/2" drive socket [or bigger] and suitable T bar, undo in the normal direction, it will come undone!

ycming · 10-04-2008

hmm ... have the car on the road, put the 30 mm socket in and a breaker bar, and just stand on it for like 10 - 20 seconds, then the hub nut will be lose, no long bar needed no nothing.

Remeber just stand on it, don't bounce about, let me come losse naturally.

Just recently done this

, because i needed to take my rear trail arm out

Ming

Smiler121 · 26-04-2008

Guide doesn't mention using grease?

levemir · 26-04-2008

Originally Posted by Smiler121

Guide doesn't mention using grease?

the bearings are normally sealed units which already contain the slippery messy stuff

D4NS · 29-07-2008

Wheres the cheapest place people have come across for replacements?

levemir · 29-07-2008

Your local motor factors will either have them, or be able to obtain them for a good price.

I got mine from Andrew Page LTD which are a large factors in the north west, I think I paid £18 ish

You can get them off ebay, but when you add in the postage it might not appear as good a bargain.

blackledge · 07-09-2008

Originally Posted by falloutdom

i need to change the back plate on mine but i cant get the soddin 30 mm nut off i hav jumped on it and everthin with a bar
i done one side but the other side dont seem to wna turn
any ideas???

thanx

Did you get the nut off in the end mate?

willismeiwas · 24-11-2008

hi,this bit just caught my eye whilst searching some advice via the web

"Refit new hub to stub axle, replace the large washer, I had to reuse the old nut - which upon inspection was sound, due to the new nut having too large a thread"

i've read a few different places that the nut should be replaced by a new one or your wheel "WILL" fall off !!,it sounds stupid as there's no retaining device on the nut or the stub axle,does anyone know how true this is as i removed the hubs regreased and replaced them after having a rumbling from the rear and i didn't replace the nuts,now everytime i drive it i'm half expecting my wheel to overtake me

and i can only find them for sale as part of the kit which i don't need the whole lot it'd be an expensive nut

by the way great forum

i'll get myself over to newbies shortly

levemir · 24-11-2008

The torque that the nut is tightened to, is so huge that the chances of the nut failing in operation is slim [or, it coming loose], if the nut does fail it will probably do so when tightened, either due to a worn thread, or fracture of the nut itself.

I would always recommend a new nut is used, however in my case on the above project I trust my own judgement and my own work if deciding to reuse an existing nut.

willismeiwas · 24-11-2008

Originally Posted by levemir

The torque that the nut is tightened to, is so huge that the chances of the nut failing in operation is slim [or, it coming loose], if the nut does fail it will probably do so when tightened, either due to a worn thread, or fracture of the nut itself.

I would always recommend a new nut is used, however in my case on the above project I trust my own judgement and my own work if deciding to reuse an existing nut.

thanx for the prompt reply

but i'm a little confused as one min you say you recommend replacing it yet you didn't do so

so could you share you knowledge with me?would i be right in saying if there was no sign of a fracture and the nut was done to the correct torque then it would be perfectly safe to use the old one,i've done other cars over the years and the ones i've done they've normally got a castle nut or the key in the shaft to enable you to tap the head of the nut into the key to stop it undoing,it's just i've never come across such hub nut with no way of ensuring it don't come undone

thanx in advance

levemir · 24-11-2008

What I am saying is, yes, I reused my existing nut, as I was happy to do so given its condition and was satisfied that it tightened up ok.

In your situation, if you are not happy that you reused the nut, and think the wheel is going to come off, then stop driving the car and get a new nut, I cant say if its right or not for you - thats a decision you have to make. You should be able to buy the nut on its own from Fiat.

If somebody brought a car to me, to replace a hub, then a new nut would be fitted and tightened to correct torque.

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