Rear brake rotor help

Rick.....I will assume you have been spraying the part line in the center of the rotor where it meets the lip on the wheel hub, and also spray at the part line inside the lug hole where the back of the rotor sits against the face of the hub. And of course you have the wheel rim helper studs removed....now for the fun part, use a large brass rod or punch or even a good sized aluminum rod as a punch.....place it between each lug hole and smack it with a hammer. What needs to happen is a shock wave or vibration thru the metal enough to break the bond between the 2 surfaces, WITHOUT deforming the metal disc itself. If you have an oxy/acetylene torch, use it to WARM only the flat surface of the rotor, again, just enough to break the bond of rust.
In fifty years of working on brakes, I have had to cut disc/drums off only 2 or 3 times, in the most worst cases.

Gary

 

I have had many rotors rusted to the hub. If the rotor is coming off to replace it you don't care about it. So you can heat the heck out of it with a propane torch and spray WD40 or similar on the partlines and wheel stud holes. Sometimes I will bang the rotor hard with a 5lb sledge hammer. Make sure you have the car on stand properly and that the parking brake is off or removed if those elements act on the rotor internals. In 40+ years including on Ferrari never hurt a bearing or hub doing this. They are very tough.

 

Just did this refurbing my handbrakes. I ended up getting a short length of chain, cutting the two end links into hooks that fit in the inspection holes in the drum part of the disc. I then got a bottle jack on the hub and cranked it up until the chain was effing tight. THEN I whacked it with a copper hammer a few times - the back of the disc is OK if you don't go crazy. Once it cracks loose, you just pump it off with the jack.

 

I was trying to remember „my version“ of doing this... I guesd it was a combination of WD-40 and cutting.
Here are some pic. Hope they are helpful.
Frank

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Hi Rick, I used a large puller on mine which did the trick, the largest one of these https://www.machinemart.co.uk/p/cht270-3-pce-gear-puller-set/

 

I couldn't find a 2 jaw puller the right size at my local