I have removed several of the torsion arms without the need for a special puller but it has taken some perseverence and judicial drifting with a block of wood and a substantial club hammer.

Ensure that the set screws have been fully remooved before you start though.  You will have to remove the hub assembly when you reassemble the axle and it will help to have that out of the way during dismantling (that is if you havent already done that)

I found the hardest part was putting the whole lot back together as keeping the leaves of the spring together was tricky. One or two leaves would invariably fail to locate on the second side to be assembled and the result would push them out of the far side past the core plug!  I have since learned that many people run a bead of weld along the end to hold the leaves in place.

Hopefully some of this will be helpful.

Paul

Pitman Arm aka Drop Arm....I use a Draper hydraulic puller. Usualy goes with a bang as it comes off the taper but it does the job.

The animal you need is a hydraulic puller . The model I use is a Draper 50094 hydraulic puller kit. Bunging that into Google will produce quite a variety of suppliers and prices. Sykes Pickavant also do one but its the Rolls Royce version for hard trade usage and priced accordingly.