Download PDF - Performance Waterjet

Section 7
Hydraulic System
Hydraulic Operating Pressure
Hydraulic operating pressure settings should be checked daily and adjusted as necessary.
High and low operating pressure is adjusted at the high and low pressure control valves per
the specifications in Table 7-1.
Table 7-1
Hydraulic Operating Pressure Limits
Adjustment
Pressure Limits
Increase
Decrease
Minimum
Maximum
High Pressure
Clockwise
Counter-clockwise
290 psi (20 bar)
3,000 psi (207 bar)
Low Pressure
Clockwise
Counter-clockwise
290 psi (20 bar)
800 psi (55 bar)
Figure 7-3: High/Low Pressure Controls
1 High Pressure Control
2 Low Pressure Control
1. Check the operating pressure to determine if adjustment is necessary.
2. If high pressure adjustment is required, loosen the locking thumbscrew on the high
pressure control valve by turning counter-clockwise.
3. Turn the knob on the control valve clockwise to increase operating pressure. Turn the
knob counter-clockwise to decrease pressure.
4. Tighten the locking nut and verify the high pressure setting.
5. If low pressure adjustment is required, loosen the locking nut on the low pressure
control valve by turning counter-clockwise.
6. Turn the hex clockwise to increase operating pressure. Turn the hex counterclockwise to decrease pressure.
7. Tighten the locking nut and verify the low pressure setting.
20480306
2-2009/Rev 0
7-4