OIL TANK CLEANER

PROBLEM TO BE SOLVED: To provide an oil tank cleaner that realizes efficient discharge or circulative cleaning of deteriorated oil in an oil tank when replacement or cleaning of the oil in the oil tank is needed due to the deterioration of oil in the oil tank, and accordingly enables external oil to be circulation-cleaned without stopping power supply by a cable even if the oil tank is, for example, a special pressure oil tank of an OF cable. SOLUTION: An oil sending part 34 that sends clean oil into the oil tank from an upper oil inlet 30a of the tank by bringing oil in the cell oil tank 14 in a dischargeable state from an outlet 30b of the tank by opening a main valve 32b of the outlet 30b, and a heating part 36 that raises the temperature of the clean oil sent in the cell oil tank 14 higher than the temperature of oil stored in the cell oil tank 14 are arranged at an oil sending path 38, whereby the temperature of the clean oil sent in the cell oil tank 14 can be controlled to a target set temperature. This configuration allows the oil to be surely replaced or cleaned by sending low-gravity oil into the cell oil tank 14 from above. COPYRIGHT: (C)2004,JPO&NCIPI