mramay - 3/18/2006 9:20 AM
rudedude - 3/17/2006 8:31 PM
Please DO NOT use a heat wrench on steering components. If you heat it enough to make it loose then you have just anealed the metal making it soft and bendable. You will be able to remove the pitman arm with a good puller.
The arm would not come off with a heavy duty gear puller and LOTS of torque, even with a couple sharp raps with a hammer. Next step, heat wrench, but not enough to put too much heat in there.
Which is why I used a propane torch, not a Mapp gas or oxy/acetylene torch. Propane, used gently, won't get it hot enough to aneal the steel. It's been way too long since my "strength of materials" class, but doesn't the steel need to be over 1,000 degrees somewhere to aneal? Pretty much red hot?
I'd guess I got the pittman arm up to a couple of hundred degrees. I didn't want to heat up the gearbox shaft directly since there are a lot of parts in the gearbox that wouldn't appreciate it.
I had the heavy duty gear puller on the pittman arm and under a very hard pull, heated the arm. It popped off with just a bit of heat.
Take care,
Mike R.