Winter is always my work on the machinery time. The pony starting motor on my main firewood hauler, a D4-7U Cat pictured in my avatar, set up at the end of October. I had to push start her for the last few trips and that is a pain because if you stall the machine in the woods there often is not enough room for another push start.
My original intention was to rebuild the pony but the parts and machine work were going to run around $1500 bucks. I belong to an antique Cat tractor site and the guys there suggested converting to electric start. The electric start conversion needs about $370 in parts and makes the tractor a lot easier to use. The problem though is that there is no hole bored to mount the starter. Using dimentions supplied by a member of the antique site I layed out the hole pattern and started drilling. We have had discussions about the Lenox hole saws and this job is a testament to there durability. The center hole is 3-5/8 inches through 1 inch of high quality cast steel. Though the hole saw doesn't have another starter job in her the hole was drilled in about 40 minutes no lubrication only an air blast to keep it cool. The mounting holes have been drilled and tapped the next job is to remove the pony motor and pinion and block off the holes they leave. I will post more photos as I progress.