procurement of spares for overhauling of cat 3412 heui engines as per nit , seal ring - turbo kph , ring piston - turbo kph , bearing thrust - turbo kph , collar thrust - turbo kph , bearing journal - turbo kph , ring piston - turbo kph , plug head , washer - turbo kph , ring retaining - turbo kph , bolt - turbo kph , bolt - turbo kph , shield cylinder head , camshaft rear gear , plate , elbow oil cooler housing , tube asly water thick pump to comp . , adaptor , main elbow , elbow main , gear heui pump drive , elbow , water oil cooler housing , tube as comp . to adaptor main elbow , elbow , turbo housing , union - flared , tube water pump to comp , connector , water on comp . , plug ( air compressor ) , plug dummy ( air compressor ) , seal o ring front structure , kit - air comp . mtg . , seal o ring heui hsg . , seal o ring heui hsg . , seal o ring heui hsg .