 Steam Hammer valve rebuilding and clearence, Rod replacement
I am rebuilding a 100# Erie steam hammer. I need to hone the cylinders that the throttle valve and the motion valve run in. That means I will need to build up the valve bodys and machine them to fit the larger cylinders. What should I build the bodys up with? Babbitt? Aluminium bronze? What should the clearence in the valve cylinders be. I will be running it on air.
I am thinking of using 4140 turned, ground and polished to make a new rod. Erie originally used 4340 for the rod. What should I use for piston rings?
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