World Series pump with integtral gearbox direct mounted to Detroit Diesel engine. The direct mount configuration ensures installation is more compact and shaft alignment problems are eliminated. Pump can be single or multi-pressure. Rugged cast iron bell housing incorporates heavy duty helical gears for quiet operation and oil cooling system for use in high ambient temperatures. Complete unit can be supplied with mounting feet to assist installation. Options include electro-magnetic clutch and different gear ratios.