Hercules DFXE

The Hercules DFXE is an American diesel truck engine.
Part of the Hercules DFX series, the DFXE is a naturally aspirated overhead valve inline six-cylinder. With a bore of and a stroke of , for a displacement of , it developed at 1,600 rpm and of torque at 1200 rpm. Designed for a British requirement, this was one of the few diesel engines used in US tactical trucks.
The engine was used in upright or horizontal configurations. 
It was used in the M19 Tank Transporter in World War Two, the Le Tourneau Model B29 Tournapull earthmover (introduced in 1945), and the Oliver OC-18 crawler tractor (introduced in 1952), among others.