Section 2
Installation
20425561
5-2005/Rev 0
2-16
6. To avoid a sudden increase in pressure, it is necessary to adjust the high pressure setting.
The high pressure adjustment is made at the high pressure control valve on the hydraulic
manifold. Refer to Section 6, Hydraulic System, for additional information.
Loosen the locking nut on the high pressure control valve by turning counter-clockwise.
Turn the high pressure control valve counter-clockwise, decreasing the pressure to the
lowest setting.
If the machine is equipped with proportional pressure control, the high pressure
adjustment is made from the controller.
7. Check the motor rotation. Start the motor and observe the pressure gauge on the hydraulic
manifold. If the motor rotation is correct, pressure will begin to build in just a few
seconds. If the rotation is not correct, the gauge will not move.
If the motor shaft is rotating in the wrong direction turn the control power off. The
electrical power phase must be reversed to any two motor leads. The leads can be
reversed at the electric motor, or at the main power disconnect.
Do not allow the motor to run backward. Incorrect motor rotation will result in
damage to the hydraulic pump.
8. Remove the cutting orifice and open the nozzle valve.
9. Activate the control power and start the motor. Run the machine in low pressure for
approximately five minutes with the orifice removed to purge the system.
10. Check for any leaks in the plumbing, or around the high pressure cylinders. If leaks are
detected, stop the machine and correct any problems.
11. If the pump is equipped with an optional booster pump, observe the pressure gauge on the
outlet manifold to ensure the discharge cutting water pressure is between 90-120 psi (6-8
bar). If not, the booster pump pressure must be adjusted. Refer to Section 4, Low
Pressure Water System, for additional information.
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