Replacing the Mega 500 wheel loader, Doosan/Daewoo's DL500 joins the DL300 and DL400 introduced in Spring ’06. The wheel loader uses a Cummins QSM 11 low-emissions engine. Doosan has improved power-train efficiency for optimum fuel economy. The variable displacement piston pump and a Parker control valve produce higher working pressure and provide the boom and bucket with multi-function capability. The cab is larger than the previous model with an air-suspension seat. Both the seat and steering column allow adjustment to accommodate most operators.