The following article explains how to modify the Hakko 850 Hot Air Rework Station to use a Nitrogen supply instead of the air supply provided by the self-contained pump.
NOTE: The Hakko 850 Hot Air Rework Station is discontinued
NOTE: Modification of any Hakko product is not supported and will void the product warranty. This information is provided as-is.
IMPORTANT: The Air Flow Control Knob on the front of the unit will no longer have an affect. This knob controled the speed of the self-contained pump which affected air flow. Since the pump is no longer in use, the flow of Nitrogen must be controlled at the source.
Remove the cover of the Hakko 850 Hot Air Rework Station by removing the 4 phillips pan head screws from each side of the unit. The interior will look like the photo shown below.
Drill a hole in the rear of the unit to pass the supply line for your nitrogen supply.
IMPORTANT: When drilling the hole, be sure not to damage the product specification label and/or fuse holder.
Disconnect the Secondary Air Supply Line at the Air/Electrical Coupling, then attach your Nitrogen supply to the Air/Electrical Coupling.
Since the pump will no longer be needed, disconnect the pump from the PCB at the connection shown in the image below.
Re-install the cover of the unit.
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