HYDRAULIC OIL WARMING-UP DEVICE FOR CONSTRUCTION MACHINE

摘要

PURPOSE: To provide a hydraulic oil warming-up device for a construction machine which can improve start property of an engine at a low temperature by warming up hydraulic oil in a pump suction pipe line before the engine is started. CONSTITUTION: The start property of an engine 1 is improved by providing a heater 5 in a suction pipe passage 4 which connects a hydraulic pump 2 driven by the engine 1 and a hydraulic oil tank 3 which collects hydraulic oil which is sucked in and discharged from the hydraulic pump 2 and warming up hydraulic oil in the suction pipe passage 4 before the engine 1 is started.