The Yanmar AC-18 is an agricultural crawler tractor produced from 2002 to 2007 as part of the AC Series. It features a Yanmar 3TNE74 1.0L 3-cylinder liquid-cooled diesel engine producing 18 hp (13.4 kW) at 2600 RPM. The tractor uses a hydrostatic transmission with infinite forward and reverse speeds in 2 ranges. It has a crawler drive with two-post ROPS for operator safety. Dimensions include a length of 87 inches, width of 47.2 inches, height of 69.5 inches, and a weight of 1422 lbs. The fuel tank capacity is 4.8 gallons. Electrical system is 12 volts with negative ground.