Heisler Throttle Lever
Nelson Riedel, Nelson@NelsonsLocomotive.com
9/03/2010, last updated 09/05/2010

The throttle is the most used control so I wanted it where it is easy to adjust.  

This photo above shows the finished throttle lever.   It is very similar to one used by Ken Schroeder on his small Mallet.   The clevis which is attached to the throttle rod is Clippard #RC-0881 with 10-32 threads for the rod, a 3/16" gap for the lever and a 3/16" diameter pin.    The lever is 1/2" X 3/16" CFS flat bar stock with a length of 7/16" brass hex bar stock silver soldered onto the top.  The pivot on the lower end is made from the 7/16" hex brass and attached with a 6-32 screw.  The pair of plates on the bottom are 1/2" X 1/8" CFS bar stock.   The pins in the bottom part of the assembly are 6-32 screws with nyloc nuts.

Photo at the right shows the side of the lever.   A 1/2" long by 3/16" wide slot was machined in the hex brass for the 3/16" thick lower part.  The two pieces were held in position with a couple 1/16" roll pins and then silver soldered. The distance between the the pins on the lever is 3" and the distance between the pins on the plates on the bottom is 1.5".  The top of the lever is 2.75" above the upper hole; just below the height if the cab roof.   The O-Ring packing on the throttle rod has sufficient friction to keep the throttle from drifting.