1. Open up the cutting head by switching the water switch on the controller to Manual. This will open up the cutting head, so as soon as intensified water begins flowing from the pump it will immediately come out of the cutting head.

2. Walk over to your pump and if possible set your pump to low pressure mode. If this is not possible, you should just turn the pressure compensator all the way down (counter-clockwise) so the pressure would be set at zero.

3. Start the pump and intensifier and you will see a stream of water coming out of your cutting head with the pressure setting that your low pressure is set at. If you turned down the compensator in the previous step you should slowly increase the pressure with the compensator till you see water coming out of the cutting head. Increase the pressure to 10,000 psi. On most pumps this will be around 500 PSI hydraulic pressure.

4. Walk back to your controller and turn the water off and on several times by using the switch. Check for leaks while you are doing this.

5. Leave the head open and walk back to the pump and increase the pressure to the cutting pressure you normally use. This can be done by increasing the compensator further or by switching to high pressure mode on the controls of the pump.

6. Walk back to the controller again and switch water on and off several times.

7. Now you are set to start cutting again and you have properly seated the new orifice.