Aluminium Impeller For Oil Cooling Blower Unit. Centrifugal Design For 3-Phase Locomotive As Per Rdso Spec. No. Rdso/2016/El/Spec/0123, Rev-0 Issued On 05/10/2016 And Dra Wing No- Rdso/2016/Sk-6/El/Spec/0123. [ Warranty Period: 30 Months After The Date Of Delivery ] ]