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Change of nozzle orifice
If your orifice is damaged by debris you will need to change the cutting head Orifice.
While the procedure is straightforward it is important to be careful and follow the steps carefully
and keep everything clean as you are working. Small debris, like a single piece of abrasive, in the
system can clog or crack the orifice.
Tools required:
•
11mm, 28mm wrench
•
4mm hex key
•
Pliers
•
Masking tape, and cleaning tools
Eye protection, facial mask required at all time.
•
Follow every step of this procedure.
•
Safely release residual pressure from high pressure hose before every maintenance .
•
Turn off WAZER and disconnect AC power supply cables.
•
Turn off water inlet.
Work procedure
•
Let WAZER dry and brush away loose Used Abrasive from bellows and gentry.
•
loosen and remove the knurled z-axis height adjustment.
•
Use a 4mm hex wrench to remove the two bolts securing the Nozzle assembly.
•
Use masking tape to cover up the exposed holes.
•
Loosen and remove the knurled guard on the Nozzle - this shouldn’t be more than hand
tight.
•
Slide down Nozzle, keep the white collar.
•
Gently peel up the Z-Axis Bellow from the Mixing Chamber.
•
Use 11mm and 28mm wrench to unscrew Mixing chamber from Guide rod.
•
Use masking tape to cover the bottom of Guide Rod.
•
The Orifice is now exposed in the body of the Mixing Chamber, you can see a tiny hole in the
middle.
•
Remove the Orifice from the Mixing Chamber by whacking it against your palm.
•
Use a toothpick or metal dental pick to remove debris from the threads both inside and
outside. Make sure no abrasive is stuck in the tread.
•
Place a new Orifice into the Mixing Chamber with the brass ring facing you.
•
Clean off all the Blue Goop from Guide Rod thread, inspect the thread. Make sure no
abrasive is stuck in the thread.
•
Reapply Blue Goop and reassemble the Mixing Chamber and Guide Rod. Pay attention to the
smoothness when threads engages. Stop and clean immediately when you feel any grinding.
•
Use 11mm and 28mm wrench to tighten them to 50Nm (37ft-lbs).
•
Reassemble the nozzle with white collar, and knurled guard together. Make sure Nozzle is
properly seated.
•
Pull the lower Bellow lip back into the groove.
•
Re-install the Nozzle assemble onto the Gantry using the two M5 bolts.
•
Make sure nozzle assembly is perfectly vertical, reapply z-axis height adjustment.
For more detailed and illustrated manual, please refer to WAZER.com/resources/maintenance/
procedure/replacing-the-orifice.
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