I remember the pony motor on an old D4 Cat we had at the company where I worked summers during college. I'm trying to remember the sequence of operation and was hoping somebody would tell me what each step was doing. There were two levers near the pony mother as I recall. You first put lever #1 in a certain position, and then started the pony motor, and watching till some guage went up to a certain level (40?) Then you pulled in the second lever, engaging a clutch to turn the diesel over. Once the diesel started the clutch was disengaged and the pony motor shut down. What did the first lever do and what was going on when the pressure was building on the guage?
RWL
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