Cleaning the High Pressure Nozzle Filter Core
[NOTICE] WAZER incorporate multiple filters before water reaches the orifice in the nozzle. The Nozzle Filter Core is the last defense in the high pressure system before the water reaches the smallest and most important part: Jewel Orifice. Overtime, the Filter Core will gradually gunk up and clogged by the silt and debris in the high pressure water stream.
Cleaning the Filter Core is important. Perform the cleaning regularly to prevent hours of repair work in the long run. We recommend cleaning the Nozzle Filter core every 20-100 hours of cutting depending on the water quality in your region.
If you do not check and clean the filter core, your Jewel Orifice may be clogged and cutting affected.
Tools Needed:
Tape
17mm wrench
4mm Allen key
Adjustable plier or 28mm wrench
Paper towel
Old toothbrush or pipe cleaner
Needle, dental pick or tooth pick
Procedure
1. Shut off water supply into the WAZER or WAZER Pro
2. Use the sprayer to wash the areas around the banjo bolt, on top of the nozzle.
Then. Use a paper towel to wipe clean and ensure there is no abrasive or silt around the nozzle.
3. Remove the Z-height adjustment knob.
4. Remove the two bolts securing the Nozzle to the Z block using a 4 mm Allen key.
5. Remove the Banjo bolt from the Nozzle by holding the mixing chamber with a pair of pliers while loosening the bolt with a 17 mm wrench
6. Be careful not to lose the 2 sealing washer on either side of the banjo fitting. If they look particularly worn they can be replaced
7. Turn the Nozzle Assembly over, you will be able to see the Filter Core inside.
8. With the nozzle assembly removed from the machine, turn it upside down, and knock it onto a soft surface. This will generally knock the filter core out from the guide rod.
If the filter core appears to be stuck in the guide rod, use a needle, dental pick or toothpick to pry it loose, and knock it out.
9. Put a piece of tape on the guide rod opening. This will prevent dust or debris from falling into the guide rod and contact the jewel orifice directly.
10. Rinse the filter core under a faucet. Use an old toothbrush or a pipe cleaner to clean the filter
11. After the filter core is clear to the eye, you may carry on the installation.
If the filter core is twisted, damaged or torn, refrain from using it. Replace the filter core.
12. Remove the tape covering the opening of the guide rod, install the cleaned or new filter core.
The filter core has an open end and closed end. Point the opening end towards the orifice, and keep the closed end towards the guide rod top opening.
13. You should see the filter core sits in place like illustrated in the picture
Properly seated Nozzle Filter Core
Improperly seated Nozzle Filter Core
14. Use the tape to cover screw holes on the gantry block
15. Remove all tools from the cut bed. Then:
Leave the banjo assembly unconnected
turn on water supply into the pump box, turn on WAZER
go to “Setup & Maintenance“ >”input and output check” > “HP Valve”. Use the low pressure water to rinse the banjo assembly.
If you are performing this activity on a WAZER Pro, go to “set up and maintenance” > “maintenance” > “nozzle purge” .
This helps to flush out any debris in the high pressure hose and banjo assembly.
16. Reinstall the Banjo Assembly into the cleaned Nozzle Assembly. Make sure there is a sealing washer on either side of the banjo fitting
17. Tighten the bolt to 18 Nm using a 17 mm socket on a torque wrench.
Take care to make sure the hose is aligned or pointed to the rear.
The wires/cables should point straight to the back, and the abrasive inlet port will be accessible on the left side of the cutting head.
18. Remove the Tape. Reinstall the nozzle to the Z-block. Using the 4mm Allen key and bolts.
19. After securing the cutting head to the gantry block, prime the High Pressure System by going to the ““Setup & Maintenance“ >”input and output check ” > “HP Valve”.
If you are performing this activity on a WAZER Pro, go to “set up and maintenance” > “maintenance” > “nozzle purge” with the pressure relief bolt removed. See “Wazer Pro HP priming”
20. Finally it is important to pay attention to the Whip orientation.
The “Whip” is the bundle of wires and hoses inside the tank.
Please check if the Whip always curls up when the nozzle travels to the rear of the tank.
Essentially, we want the Whip to stay orientated in an upwards fashion in every direction the nozzle moves.
For more information, refer to this page about How to Take Care of the Whip