BeamBox (Pro) Water Pump Guide


**Before attempting any of the following, please be sure that you are on the latest firmware release for your model of Flux laser cutter. Older firmware may be prone to random bugs which may affect the functionality of the water pump.**

The BeamBox and BeamBox Pro laser cutters utilize a water pump and tank assembly, which we will refer to as only the "water pump" since the two cannot be separated from each other.

If the laser is not firing or the effectiveness of the laser is diminishing, the cooling system may be to blame. There are a few required steps to determine the functionality of the water pump:

  1. Be sure that the tank is filled with distilled water and that there are no large bubbles present in the system. The water pump has a level sensor built-in and will disable the pump if the water level is too low.
  2. Navigate to the Maintain menu and select "Pump" to confirm if the water pump turns on. If the water pump does not turn on, lift one end of the machine to dislodge any air bubbles and try again. If the water pump still does not turn on, continue to the next step. If the water pump turns on but you receive an error message, please see this guide for servicing the flow sensor.
  3. Move to the rear of the machine and remove the 4 Philips screws securing the rear exhaust fan assembly, then carefully slide the assembly out of the machine. Be mindful of the fan wires as you remove this assembly, then set the assembly aside.
  4. Reseat the water pump connector (see photo below), then again navigate to the Maintain menu and select "Pump" to confirm if the water pump turns on. If the water pump still does not turn on, it will likely need to be replaced. Please contact us for the proper replacement part.


The required materials for the replacement procedure are as follows:

  • Philips screwdriver (magnetic tip)
  • Flat screwdriver
  • Pliers
  • Paper towels
  • Container for water
  • Replacement water pump
  • Distilled water (for refilling)
  • Funnel (provided with the machine)

Start by removing the rear water pump access panel and exhaust fan assembly by removing the 4 Philips screws for each. Next, unplug the water pump and exhaust fan connectors from the daughter board, then set the fan assembly aside.

Locate the two Philips screws from under the water pump bracket and remove them; the water pump and bracket will now be lowered as an assembly. Carefully orient the water pump and bracket assembly so that you may access the hose clamps from outside of the machine.

Using the flat screwdriver, remove the top fill plug and drain the water into your water container. Some of the water will remain in the system, so be ready to clean up any spills from the upcoming steps using the paper towels.

Once the water has been removed from the water pump, locate the spring hose clamps on each of the Inlet and Outlet barbs. Using a set of pliers, gently squeeze the spring clamp tabs together to release the tension on the hose and barb. While holding the tabs together, slowly rotate the clamp back and forth to remove it from the barb, then release the clamp an inch or so from the end of the barb.

With the spring hose clamps removed, slowly rotate and pull the hoses off of each barb. Once the hoses are removed, drain any remaining water from the hoses and the water pump into your water container.


With the water pump assembly detached from the machine, the bracket can now be easily separated from the water pump by removing the two screws located underneath. Once removed, install the new pump in its place and perform the same steps in reverse to complete the installation. Refill the cooling system using distilled water and the provided funnel.

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