Instruction Manual

512.14 Hydraulic Power Unit
30
Checking the Hydraulic Fluid
Maintenance
5. Check and adjust the hydraulic fluid delivery system so that:
• Hydraulic fluid temperature stabilizes within the parameters given in
“Specifications” on page 10 when the HPU is operating at high
pressure.
If you need to adjust the water-regulating valve, refer to “Adjusting the
Water Flow” on page 23.
• Pressure line reading is maintained at 21 MPa (3000 psi) maximum
static value.
If you need to adjust the pressure control valves, refer to “Adjusting the
Output Pressure” on page 25.
• Maximum drain line back pressure is limited to 0.1 MPa (15 psi).
Other system adjustments are described in the Operation chapter.