supply of spares of k-45s gearbox for 3x1 . 25mw iqbal mhp kargil , supply of helical gearpump for k-45s gearbox . , type: helical gear pump , capacity: 70 lpm , operating speed: 750 rpm , suction x delivery port size: 1 . 25 inch x 1 . 25 inch bsp . the pump shall be of flanged mounted design and shall be suitable to be mounted on existing walchand nagar gear box , model k-45s . the pump shall be providied with a spring-loaded pressure relief valve . material of construction of various parts: main body and cover: ci to is210 gr fg260 . helical gears: hardened en-24 steel . shafts: hardened en-24 steel . seals: neoprene rubber . bearings: bush bearings . the drive and driven gears will be suitably heat treated .