The Caterpillar D4E SA Special Application is an agricultural crawler tractor produced from 1984 to 1991. It features a Caterpillar 3304 turbocharged 4-cylinder diesel engine with 97 hp net power. The tractor has a 5-speed gear transmission with crawler drive. It has a fuel capacity of 63 gallons and an open center hydraulic system with 6 gallons capacity. The D4E SA has 16-inch wide tracks and weighs between 18,450 to 19,050 pounds. Electrical system includes a 12-volt battery and 35 amp alternator charging system.