... noise 4Reliable quality /performance DT3 oil cooler A wide range usage :such as transmission system , engine , hydraulic and lubrication system etc ... can be used for cooling the material below:Mineral oil , synthetic oil , bio oil , HFA , HFB , HFC , HFD liquids , water and ... and construction machinery: 1/3 of diesel engine power.-Hydraulic pumps driven by an electric motor:1/3 of electric motor ...