GD Series
GENERAL CHARACTERISTICS AND FEATURES
The GD series is a crankshaft design radial pistonhydraulic motor based on
a nine-cylinder design.These motors use several standard components, partsof
well-proven constant displacement motors (GMseries) for greater performance
and reliability.The nine cylinders design guarantees a smooth out-put
torque, the variable shaft eccentric is based on asimple reliable mechanism.DESIGN AND OPERATION OF THE TWO SPEED SYSTEM
Dual displacement is achieved by a variation of theshaft eccentric cam. The
displacement controlsystem is based on a hydraulic device, whichactuates a
hydraulic control valve mechanism toselect minimum or maximum
displacement. Thedual displacement mode allows the motor toreduce the
displacement down to the 10% of themaximum, hence making the speed ten time
higher
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