801 Series Diesel Eingine Back Hoe And Loader

Purchased this tractor/backhoe/loader from the kempner, TX area. Previous owner had it for a year to clear his property and did not know the make and model. Tthe serial number on the right side of the engine is 310609- and the engine manifold has the serial number 310568 imprinted on it. the transmission housing serial number is 310835 and right below the serial number is the number 910. The serial number plates are still on the Backhoe-series number 713 I9-I53, serial number II3I, and the loader is a series 703 I9-I05 serial number 3740. I have provided multiple pictures to help in the tractors indentification. I believe this to be a late 50's model 840? from research on your website, but not sure. I would greately appreciate your help in it's actual ID so I can purchase the correct owners manual. Thank-You very much for your help. Dave Submitted by David Albiez, from TX