FIELD: machine building.
SUBSTANCE: invention relates to machine building, namely to hydraulic drive of lifting-transport, construction, machines and equipment and other special equipment, hydraulic drive of which is operated at negative temperatures. Proposed preheating device of hydraulic drive comprises hydraulic tank and gas heat carrier circulation circuit, connected to the outlet pipeline of internal combustion engine by means of three-way valve, wherein the device is equipped with electromagnets fitted on walls of the hydraulic tank and metal granules located in working fluid, on the inlet and drain pipes there mesh filters are fitted.
EFFECT: invention ensures reduction of time of heat preparation of the hydraulic drive, reduction of costs for heating of working liquid, extension of lifetime of elements of hydraulic system.
1 cl, 1 dwg
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