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Has anyone changed them?. Trying to look into it as a favour for someone so I am not too willing to splash out on a manual etc. I had the wheel off for a look, removed the caliper and the two torx retaining screws, but the disc wouldn't budge. There seemed to be a seperation line between the disc and hub, so I wouldn't think the large center hub nut needed to be removed, anyone know for sure?. I googled for Saxo websites etc, but didn't come up with any technical info.
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You dont say why you are having a look?.Disc`s normally weld themselves to the hub due to rust.assuming you are going to change them a clout with a hide hammer or similar should do the trick.unless you want the hub off no need to take of the hub nut
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Never "clout" a brake disk to remove it from a hub unless you want to wreck the wheel bearings by Brinelling the raceways. Rotate the disk as you lightly tap with a soft mallet from behind.
When this fails to work, as is often the case, arrange for the opposite wheel and tyre to be on the ground, and run the engine at idle in first gear. Ensure that all wheel bolts and disk fixings are removed on the side you are working on. Now very carefully apply the brakes, ensuring that the vehicle is in no danger of rolling off. This always works; the disk comes free with a "crack" - no effort.
659.
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\"When this fails to work, as is often the case, arrange for the opposite wheel and tyre to be on the ground, and run the engine at idle in first gear. Ensure that all wheel bolts and disk fixings are removed on the side you are working on. Now very carefully apply the brakes, ensuring that the vehicle is in no danger of rolling off. This always works; the disk comes free with a \"crack\" - no effort.\"
isnt this advice abit dangerous,health and safety whilt working a auto init my son.
Rotate the disk as you lightly tap with a soft mallet is cool as is clout with a hide.......
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659FBE You made a good point there.But I have only known it to work if a disc is warped or the caliper is not working properly on one side I think you will know what I mean.I did what I would call a nasty one on a granada 4 years ago usual methods did not work including yours.I even tried a four point puller with an adapter ie so as not to damage the hub nut/cap.I ended up using a 14 pound hammer.It worked but took ages to get off.Ps I still look after the same car with no after effects from the horrible bashing I gave it.75K after it was done.
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Thanks for all the replies. The current discs are warped and worn so will be removing to fit replacements and so not worried about damaging old ones, damaged bearings are not something I want to deal with though.
I have already tried rotating and tapping with hammer both on the face and from behind, but no joy. Fully understanding the risks I will try the first gear/apply brake method and had thought of something like that, but figured I would check that the center nut did not have to be removed first...which was the simple solution I was hoping for.
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There are no problems with my method of unsticking a brake disk if you are sensible. Health and Safety legislation is designed for people who are unable to think for themselves.
Observe common sense, and remember how a differential works. Ensure all disk fixings and wheel bolts are removed and apply the brakes gently - it doesn't take a lot to shift a well stuck disk by this method. Don't touch the centre hub nut (crimped into a groove in the shaft).
Brinelled bearings caused by clouting the hub often fail many miles later. I'm afraid consequential damage is the hallmark of many motor repairers. (Takes cover).
659.
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I will let you know on that as I have to replace discs yet again.I did take the precaution of putting a smear of copperslip on the back of disc.ps I was expecting the car to be scrapped due to rust on chassis but it seems car is liked to the point it has been repaired.as I do observe common sense.will hope I dont have problems.your comments noted
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No one has mentioned blowtorch on the disk to expand it a bit. I assume it has already been soaked in WD40 or similar for a few days?
The very ulimate and safe resort I suppose would be to remove the entire hub with disk, place on a solid surface, and take a heavy hammer to the disk, smashing it if necessary.
Let's hope it doesn't come to that!
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Yes WD40 was applied liberally. I have no access to a blow torch and actually find that more risky than the first gear/brake method mentioned. I can already imagine a grease packed bearing going up in flames and taking other expensive bits with it. I really don't want to deal with removing the hub and if it came to that I would have to declare the job beyond my abilities. A favour and free labour only goes so far.
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if you support the discs with a solid block under the flange you will de quite safe to hit it soundly on top of the flange with a hammer on top with no fear of damage to bearings as they will have no load at this point,drilling a hole down the side of the flange would make it crack here when hit with hammer but you shouldnt need to do that.sorry but I also think spinning it in gear is unsafe
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trancer
If you don\'t want to use a naked flame (although I think with care this is safe enough) then try pouring a kettle full of boiling water over the disc where it fits on the hub before using the hide hammer.
Regards
John S
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There are no problems with my method of unsticking a brake disk if you are sensible>>
I had no problem with the idea.and still dont.As it has been a good method for some years.
health and Safety legislation is designed for people who are unable to think for themselves. I didnt answer before but thought that was out of order.there are cases when the disc wont move and drastic action needs to be taken.and believe you me I suspect some actions are worse than I took unknown to the owner.your statement of wheel bearing failure was a valid one but I doubt the short sharp clout will hurt.But dissagree that running on one drive shaft is a good idea.I think you forgot to mention oil drag may-cause the undriven side to drive causing it to drive off.sorry to dissagree but do?
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