... crane Function of electric motor cable reel : DJ1D type constant tension cable reel drum are mainly used on ... usually used on gantry crane,tower crane,and bridge type lifter and the other mobile devices.Structure:1, ... drum(DJ1D-I,II,III,IV),workers should put out the vent plug,install the cable drum in the ... first using, the waste oil must be all poured out and using Kerosene or Diesel fuel to flush the ...