Section 2
Installation
20479262
9-2010/Rev 02
2-15
6. Check the motor rotation. Start the motor, and observe the hydraulic pressure gauge on
the front of the machine. 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.
7. If the unit is equipped with an oil-to-air heat exchanger, check the fan motor rotation.
When viewed from the motor end, the fan should rotate clockwise. If the rotation is not
correct, the electrical power phase must be reversed to any two motor leads. The leads
can be reversed at the junction box on the fan motor or at the electrical enclosure.
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. Observe the booster pressure gauge on the front of the machine 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.
Remove the acorn nut on the side of the booster pump and use a flat blade screwdriver to
turn the adjustment screw. Turn the screw clockwise to increase the pressure or counter-
clockwise to decrease the pressure.
12. Install a large, inexpensive orifice and start the machine.
13. Select high pressure operation. Increase the high pressure setting in gradual increments,
checking for leaks at each interval. Continue increasing the pressure until the operating
pressure is reached.
The high pressure setting is increased by turning the high pressure control valve on the
hydraulic manifold clockwise.
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