Tender For supply of overhauling kit for unloader valve(ii97710) of m/s. knorr bremse make computer controlled brake system for wap-7/ wag-9 locomotives. kit consisting of 04 items as follows.1) compression spring as per m/s. kbi part no. c150925. qty/set. = 01 no.2) piston assembly as per m/s. kbi part no. 1175554. qty/set. = 01 no. 3) o ring as per m/s. kbi part no. c150951. qty/set. = 01 no.4) gasket as per m/s. kbi part no. c150952. qty/set. = 01 no.