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HY28-2668-01/GC/NA,EU
GOLD CUP
®
Series - Application Manual
Piston Pumps & Motors
1.6
Parker Hannifin Corporation
Hydraulic Pump Division
Marysville, Ohio USA
Section 1
Variable displacement motors use the same rocker cam, cradle and stroking mechanisms as
the package pumps (see Figure 1.11).
The gerotor pump(s), valve block and ring checks are not included. Since there is no gerotor,
servo flow must be plumbed to the motor from an external source such as the pump servo
pressure.
In place of the pump valve block, the package motors have a small valve block containing the
hot oil shuttle and low pressure replenishing relief valve. Non-package motors do not have this
block.
Figure 1.11
Variable displacement motor
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