I picked up a large portable concrete mixer. It was made by C.F. Gilco Inc. From Grafton WI. There is a manufacturers name plate, but it only has a serial number and no model number. It has a Hatz 2G40 2 cylinder diesel engine. I believe that is about a one yard mixer. I would like to find an owner's manual for the mixer. I can get an engine owner's manual from the Hatz website. If anyone has seen a mixer like this one or has operated one I would be interested to hear about it. The company is still in business and still makes mixers. I emailed them but don't expect any support for a 20-40 year old piece of equipment.