The Caterpillar D7G SA Special Application is an agricultural crawler tractor produced from 1980 to 1986. It features a Caterpillar 3306 turbocharged aftercooled 6-cylinder diesel engine with 250 hp (186.4 kW) output. The tractor has a 6-speed gear transmission with 4 reverse gears and a wet disc clutch. It is equipped with crawler drive and offers ROPS with an optional air-conditioned cab. The D7G SA has a fuel capacity of 155 gallons and a hydraulic system capacity of 24 gallons. Its dimensions include a length of 179 inches, width of 103 inches, and operating weight up to 40,700 lbs. The tractor uses 22-inch tracks with options for 24 and 26 inches. Electrical system includes a 12-volt battery and alternator charging. The D7G SA was originally priced at $166,210 in 1985 and has a bulldozer variant. It is related to the Caterpillar D8L SA model.