Section 6
Hydraulic System
20479283
8-2009/Rev 01
6-3
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 6-1.
Table 6-1
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) 1,500 psi (103 bar)
Figure 6-2: High Pressure Control Valve
1. Check the operating pressure to determine if adjustment is necessary.
2. If high pressure adjustment is required, loosen the locking nut 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.
Figure 6-3: Low Pressure Control Valve
1. Check the operating pressure to determine if adjustment is necessary.
2. If low pressure adjustment is required, loosen the locking nut on the low pressure control
valve by turning counter-clockwise.
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