Importance

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Abstract

A variable displacement hydraulic motor is easily mounted on a power shovel without interfering with a truck frame of the power shovel and without projecting outward therefrom. The hydraulic motor is easily assembled and machined in its manufacturing. In the hydraulic motor (M'), there is provided an end cover (57) in which is slidably mounted a piston lever (69) which is oppositely disposed from a drive shaft (44) of the hydraulic motor (M') to extend in a direction perpendicular to an axis of the drive shaft (44). Since the hydraulic motor (M') is provided with a valve plate swinging unit having a pin (71) through which the piston lever is connected with a valve plate (59) fixedly mounted on a cylinder block (60), it is possible to directly mount the end cover (57) on a main casing (50) of the hydraulic motor (M') so as to be perpendicular to the axis of the drive shaft (44).

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First Claim