Motor Pressure Compensator Control
Shift Pressure Adjustment
The following procedure requires the
ability to induce a sufficient load to
create maximum system pressures.
Take the necessary safety precautions
for your application.
Refer to machine specifications for proper pressure setting
and how to induce load.
Using an appropriate adapter, tee a 10,000 PSI
gauge into the system pressure feedback port.
Install a 0-300 PSI gauge into the control pressure
Start prime mover and slowly accelerate to rated
RPM while leaving the pump in neutral.
Due to control adjustment setting bias
etc., there may be system pressure
created immediately upon starting the
prime mover. Take the necessary safety
precautions for your application.
The control pressure and system pressure should
Stroke the pump control and slowly induce load on
the motor to raise system pressure to the desired
"shift" pressure (refer to machine specifications for
proper shift pressure).
The control pressure should drop to a minimum
pressure (approximately 25-75 PSI) at the same
time the desired "shift" pressure is reached.
If the control pressure drops before the desired
shift pressure is obtained, loosen the adjustment
screw locknut with a 1/2" wrench and using a 5/32"
internal hex wrench, turn the adjustment screw CW
to obtain desired shift pressure.
If desired shift pressure is obtained before control
pressure drops, turn the adjustment screw CCW to
obtain desired proper shift pressure.
Stop the prime mover, remove the gauges and
adaptors, and reconnect the feedback hose to the