My rear drum is stuck

[bikemaniac]

Hi,
I have serious issues getting my left rear drum off. The right one was also difficult and required a puller. Inspecting the conical axle surface and the conical mating part of the drum revealed a small area which looked like the parts were welded together due to high pressure and no grease. The puller was able to snap that strange high pressure welding.

The left drum is completely stuck: I tried heating the area where the other drum showed the inside welding marks. While heating with the propane torch I exerted a strong force using a puller. I guess I have heated the hub part to approx 400 degF ... but very very far from any color change towards red/yellow.

I tried slapping the drum with a 2 pound plastic mallet to see if I can free the bond. I tried slapping the drum while the puller is pulling, but nothing helps.

I use a normal 2 arm puller, but the pulling force is so high that the arms are sliding off. I feel that a lot of outward force is applied to the system, but nothing helps.

Does anyone know how I can get the drum off?

Lucas