202 HyPrecision 50S/60S/75S Operator Manual 808690
9 – Installation
Installation
Flush the pump and the high-pressure tubing
Follow this procedure after replacing or repairing high-pressure tubing and fittings.
This procedure identifies 1 method to flush out the high-pressure lines. If this pump was purchased through
an OEM, the OEM might recommend a different procedure.
This procedure can cause damage to the on/off valve sealing parts and orifices. Keep spare kits and orifices
available.
1. Remove the cutting head and the orifice.
2. Make sure that the on/off valve is closed.
3. Turn ON the pump in cooling mode. Permit the pressure to stabilize.
4. Make sure that the hydraulic pressure is at or less than 34 bar or 3,447 kPa (500 ). If the pressure is higher
than 34 bar or 3,447 kPa (500 psi), contact a Hypertherm Technical Service Associate for assistance.
5. Change the pump to cut-pressure mode. The intensifier strokes until the pump reaches the cut-pressure
setting and then it stops stroking.
6. Turn the cut-pressure control knob until the hydraulic pressure is 34.47 bar or 3447 kPa (500 psi).
7. Use the CNC control to make a program that turns the valve ON and OFF in 1-second increments. Run the
program in a loop for 15 minutes.
If the CNC control is not available, turn the head ON and OFF in 1-second intervals for 15 minutes. This
shocks the high-pressure tubing and frees debris in the tubing.
Debris can cause damage to the on/off valve needle and the seat. If this occurs, attempt to complete this
procedure by removing debris from the parts rather than replacing the parts right away.
8. Increase the pierce pressure to 69 bar or 6,895 kPa (1,000 psi). Run the program in a loop for 15 minutes.
9. Install a ruby orifice in the cutting head. For orifice sizes, refer to the
Pump specifications. section, which
begins on page 173. Run the program in a loop for 15 minutes.
10. Increase the pierce pressure to 138 bar or 13,790 kPa (2,000 psi). Run the program in a loop for 15
minutes.
11 . Increase the pierce pressure to 207 bar or 20,684 kPa (3,000 psi). Run the program in a loop for 15
minutes.
12. Examine the on/off valve needle, the seat, the seals, and the orifices for damage. Replace these items if
necessary.
WARNING
Do not operate the pump without the shaft access cover and all other safety devices correctly
installed. Do not remove guards while the pump is operating.
CAUTION
It is common for small pieces of metal and debris to be present in newly installed high-pressure
tubing. Flush the system to prevent damage to orifices, on/off valve parts, and other parts of the
high-pressure system.
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