INFO ON DUMP TRAILER

New to this forum, hello to all ! looking for info on a sears 18 cu ft deluxe mechanical dump cart that i just got . It has a screw drive crank handle that rasies the bed and a adjustable gate to control flow of what your dumping such as sand or gravel . Part no is 402-261380 , all I can find out from sears is about the parts that are now not available due to age . Anyone with info such as years made or whatever you can share will be great . I can send a photo if needed ............................. Thanks everyone ....... D GREEN