FIELD: mechanical engineering. SUBSTANCE: hydrostatic drive includes hydraulic pump, distributing devices made in form of movable member with cut which is used in each hydraulic pump for connecting the outlet side directly with inlet side in disengaged position and isolates the outlet side in engaged position. drive has differential gear connected to support by means of overrunning clutch for operation of mechanism at two gear ratios. Drive includes hydrostatic device of clutch mounted between above-mentioned support and housing of drive. EFFECT: simplification of construction; improved disengagement characteristics at absence of excessive pressure of hydraulic fluid in engaged position. 10 cl, 4 dwg
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