Power shift valve
The valve regulates the secondary servo hydraulic pressure to the hydraulic pump regulators to control the
swash plate angle and allowable pump output.
The secondary servo hydraulic pressure varies in proportion to the current value at the proportional
solenoid valve.
The proportional solenoid valve spool vibrates continuously to maintain the secondary servo hydraulic
pressure, and is very sensitive to contamination due to the close tolerances of the spool/valve body. In the
event of a malfunction, always inspect the valve for contamination before replacing it.
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