How to free discs from hubs???

dan_beeston · Jan 17, 2010

Hi All,

I'm in the process of fitting new wheel bearings to our 300tdi Discovery, so thought I would replace the discs while I was at it as they are pitted....

The five disc retaining bolts came out easily, but no matter how much hammer loving I give it I can't shift the disc off the hub!

Unfortunately I don't have access to a gas axe or hydraulic press, are there any other tricks I can try? I've got some penetrating oil soaking in as I type.

Cheers,

Dan

veduk · Jan 17, 2010

I have just done mine, i tried heating them with a blowlamp to no avail. In the end it took a subtle blend of bad language and a sledge hammer.Good luck

Griffdowg · Jan 17, 2010

have you tried drifting a cold chisel between them? wedge them apart?

straws, clutching, i know

dan_beeston · Jan 17, 2010

Good thinking with the cold chisel, but I haven't got anything the right shape/profile to wedge in anywhere useful! I though I might be on to something with my tapered ball-joint seperator for a minute, but it wasn't quite fat enough

david451 · Jan 17, 2010

dan_beeston said:
Hi All,

I'm in the process of fitting new wheel bearings to our 300tdi Discovery, so thought I would replace the discs while I was at it as they are pitted....

The five disc retaining bolts came out easily, but no matter how much hammer loving I give it I can't shift the disc off the hub!

Unfortunately I don't have access to a gas axe or hydraulic press, are there any other tricks I can try? I've got some penetrating oil soaking in as I type.

Cheers,

Dan

Get the disc on two blocks so the hub is above the ground, put a wooden block on the hub and bash it out with a hammer, or a bigger hammer.

Dont hit the hub without a block on it you will destroy it.

Mr Fleg · Jan 17, 2010

stick them in the oven to get them hot hot hot then pour cold water on till they are cold cold cold, will fall off, have a nice day now.

P38dseGAV · Jan 17, 2010

BIG ****ING HAMMER thats the way tho use a block of wood so u dont damage out oh and dnt hit ur hand it hurts

landymike · Jan 17, 2010

bolt the hub back onto the wheel so the disc is upper most then hit the disc all around the edge untill she pops off,

david451 · Jan 17, 2010

Mr Fleg said:
stick them in the oven to get them hot hot hot then pour cold water on till they are cold cold cold, will fall off, have a nice day now.

Oh yah maniac, think of what that will do to the bearing tracks, thats why you never heat em, aint good for the studs either.

Just knock the fokers off yah woose.

90truckcab · Jan 17, 2010

as above, two blocks of wood to keep them off the floor, a block on top and one good clean shot with a big hammer, short handled sledge usualy shifts them,

90truckcab · Jan 17, 2010

got a 50 tonne press ere, if yer local

Sirus · Jan 17, 2010

90truckcab said:
got a 50 tonne press ere, if yer local

I'll have it......oh bugger you dint mean giving it away

90truckcab · Jan 17, 2010

Sirus said:
I'll have it......oh bugger you dint mean giving it away

yer not the first to ask and prob not the last !

yerl only trap yer fingers in it ,

any way i need it to make some cider

Mr Fleg · Jan 18, 2010

for DAVID451, how hot will a disc get under braking, oh yeh hot enough to harm the studs and bearing tracks, how do you get anchor pins out then without heat? have a nice day now, ps steel can only be tempered above 800 degrees, as a fellow engineer you already know that, sorry.

90truckcab · Jan 18, 2010

Mr Fleg said:
for DAVID451, how hot will a disc get under braking, oh yeh hot enough to harm the studs and bearing tracks, how do you get anchor pins out then without heat? have a nice day now, ps steel can only be tempered above 800 degrees, as a fellow engineer you already know that, sorry.

snigger

P38dseGAV · Jan 18, 2010

90truckcab said:
snigger

PMSL :mil81:

big dave2 · Jan 18, 2010

IF your not wanting your discs ,cut with grinder and cutting disc,wedge a cold chisel in the cut they will either give or crack right across an just fall of ,simples our kid....dave

david451 · Jan 18, 2010

Mr Fleg said:
for DAVID451, how hot will a disc get under braking, oh yeh hot enough to harm the studs and bearing tracks, how do you get anchor pins out then without heat? have a nice day now, ps steel can only be tempered above 800 degrees, as a fellow engineer you already know that, sorry.

Now now, I think the point was quenching it after you roastid it fat face, you will have the tracks falling out or even the studs, two different metals react at different rates, thats why we heat em up and cool em down like that to upset the molocules and they come loose, ring gears on flywheels and the such like, and I doubt any hub would get oven hot on the road coz the seals would melt, but personally I wouldnt heat any hub up like that with the tracks and studs in place even if I never quenched it, nasty

And I'm having a nice day thank you wif a coffee and rock bun in bed wif mah phooter talkin to yhooo.

david451 · Jan 18, 2010

big dave2 said:
IF your not wanting your discs ,cut with grinder and cutting disc,wedge a cold chisel in the cut they will either give or crack right across an just fall of ,simples our kid....dave

Used to take truck drums off by that method, a small cut then pound the bastid until it cracked, you could bash them all day and never get em off and still have to fit a new drum at the end of it.

Just watch yur eyes tho.

trax99 · Jan 19, 2010

big piece o wood and the biggest bastard of a hammer you can find then tek all of yo frustrations out on it.

Now that what I call engineering....................old school

How to free discs from hubs???

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