3126 slotThe Caterpillar 3126 is a turbocharged 7.2L in 6-cylinder diesel engine manufactured by Caterpillar and first introduced in 1995; it was the first electronic mid-range diesel engine that3126 engine applications Caterpillar 3126 engines are used in many work applications such as delivery trucks, dump trucks, garbage trucks, snow plows, flatbed trucks and school buses.