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[Sir Tigger KC]

.... to remove a welded on brake disc? 

I need to change the rear discs and pads on the Mondeo and made a start this afternoon, only to find that the disc is welded on. 

When I did the fronts last year I smacked 7 bells out of them with the sledgey.  One came off whole, the other in pieces.... 

Given it's New Years Day and some of the neighbours have family and friends round, I refrained being a considerate chap, so squirted lots of WD40 around and gave it some light taps with the hammer. 

Tomorrow however.... 

Unless someone comes up with a better solution.  Heat perhaps?   

[Field Marshal Dr. Opti]

Gentle manipulation with 'sledgy the hammer' should see you right.

[BazaJT]

Must admit my first thought was heat,but would that run the risk of damaging the bearing in some way?Best rust buster I've found is a 50/50 mix of atf-u and acetone.Local stealer uses your primary method of "Sammy".

[Migv6 le Frog Fan]

A puller ?

[STEMO]

A puller ?

Who are you calling a puller? 

[Sir Tigger KC]

A puller ?

No special tools available. 

I have a range of hammers in different sizes, a blowtorch and a gurt big iron bar....     

[biggriffin]

 https://youtu.be/8MA41pqREEE

[Sir Tigger KC]

Thanks BG! 

I havn't taken the caliper bracket off yet, but I took off the caliper and took out the disc screw, gave the disc a tap with the hammer and it's rock solid. 

[Andy H]

I had this problem on the MV6 last month.

I tried a little 'light persuasion' but I wasn't prepared to hit it hard enough to make it let go.

Plan B was to take out the retaining screw and wheel bolts - started the engine, stuck it in 'drive' and applied the brake repeatedly until the disc released it's grip on the hub. 

The disc can't go anywhere because the caliper is holding it in place.

Edit - the drag in the gearbox is enough to turn the wheels so no need to apply lots of throttle - just press the brake each time the disc starts turning at about walking pace until it eventually lets go.

[biggriffin]

I had this problem on the MV6 last month.

I tried a little 'light persuasion' but I wasn't prepared to hit it hard enough to make it let go.

Plan B was to take out the retaining screw and wheel bolts - started the engine, stuck it in 'drive' and applied the brake repeatedly until the disc released it's grip on the hub. 

The disc can't go anywhere because the caliper is holding it in place.

Edit - the drag in the gearbox is enough to turn the wheels so no need to apply lots of throttle - just press the brake each time the disc starts turning at about walking pace until it eventually lets go.

.

Old school, workshop practice,, before the elf's.

[Webby the Bear]

For whatever reason the mundane-o discs take quite a bit to knock off.

[Sir Tigger KC]

For whatever reason the mundane-o discs take quite a bit to knock off.

Yes it was a hell of a job when I did the fronts last year. 

Ended up smashing one up... 

[Andy H]

Oops - my reply isn't going to help in getting the rear discs off a wrong wheel drive car

[Doctor Gollum]

Is the hub bolted to the trailing arm?

If yes, unbolt it and place the disc face up on a couple of blocks and smash ten bells of shit out of the centre of it to knock the hub off the disc

[78bex]

.... to remove a welded on brake disc? 

I need to change the rear discs and pads on the Mondeo and made a start this afternoon, only to find that the disc is welded on. 

When I did the fronts last year I smacked 7 bells out of them with the sledgey.  One came off whole, the other in pieces.... 

Given it's New Years Day and some of the neighbours have family and friends round, I refrained being a considerate chap, so squirted lots of WD40 around and gave it some light taps with the hammer. 

Tomorrow however.... 


Unless someone comes up with a better solution.  Heat perhaps?   

OK are they deep sleepers  good, won`t take you more then 30 minutes to get the job done if you start it now 
I never hammer from the rear of the disc, there`s always a risk of hitting & deforming the caliper bracket  mounting points. hammer it diagonally across the front face.
The folks next door will just think you`re ringing in the new year......again 

[Shackeng]

When they do come off, refit with some copper slip for ease of removal next time.

[Nick W]

When they do come off, refit with some copper slip for ease of removal next time.

Wire brush the hubs first - something you should do for any hub face mounted disc. This is a perfect job for a cordless angle-grinder with a cup wire brush.

[Sir Tigger KC]

Well it came off in the end with much hammering, bashing and bad language! 

[Webby the Bear]

For whatever reason the mundane-o discs take quite a bit to knock off.

Yes it was a hell of a job when I did the fronts last year. 

Ended up smashing one up... 

It’s almost like the hub and disc hat are an interference fit  I’ve had wheel bearings pop out easier 😂😂😂

I saw one of our guys hit one repeatedly so hard until the hat separated from the disc 😧😧😧😧😧😧😂😂😂

[78bex]

For whatever reason the mundane-o discs take quite a bit to knock off.

Yes it was a hell of a job when I did the fronts last year. 

Ended up smashing one up... 

It’s almost like the hub and disc hat are an interference fit  I’ve had wheel bearings pop out easier 😂😂😂

I saw one of our guys hit one repeatedly so hard until the hat separated from the disc 😧😧😧😧😧😧😂😂😂

 The fleet repair co. who serviced the vehicles for the company I last worked for used a really quick & easy method. But of course they had all the kit 
The technician first assembled  a 3 legged  puller on the disc & got some tension on the device & sprayed a lot brake cleaner fluid up behind the disc
He swopped the windy gun for an air hammer & hammered on the front face of the disc where it sits on the hub. I`d say after about 2 minutes of this deafening treatment & with his mate increasing the tension on the puller the disc popped off. 

[aaronjb]

That's pretty much how I got the rear discs off the Jaguar hubs when I broke it, too.. although replace "air hammer" with "lump hammer" and "popped off" with "came off with such a bang I thought a bomb had gone off"

[Kevin Wood]

That's pretty much how I got the rear discs off the Jaguar hubs when I broke it, too.. although replace "air hammer" with "lump hammer" and "popped off" with "came off with such a bang I thought a bomb had gone off"

The boot came off much easier. As did the engine!