On all printheads manufactured before the month of May, 2023, there is a defect flaw in the design of the part cooling duct that causes it to sag below the nozzle, potentially dragging along the print. A new design fixes this issue, involving a new part cooling duct and cold end duct which significantly stiffens the fan assembly.
Tools Required:
2.5mm Allen Wrench
1.5mm Allen Wrench
Flush Cutters
Loctite 243
Parts Needed:
Cold End Duct PN: HSD-000049-MFG
Part Cooling Duct PN: HSD-000054-MFG
M3x35mm Socket Head Screw
Cable Tie
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Step 1: Remove Printhead
Follow guide How To Install and Remove A Printhead to remove the printhead.
Step 2: Cut Cable Tie
Using flush cutters snip and remove the cable tie holding down the hot end wires.
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Step 3: Remove Ducts
Using a 2.5mm Allen unfasten the part cooling duct and the cold end duct from the T plate.
Unplug the fan cables to free the assemblies from the printhead.
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Step 4: Remove fans
On the part cooling fan, using a 2.5mm Allen remove the 4 M3x35mm screws from the old duct.
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On the cold end blower, peel back the corners of the magnetic shielding foil to expose the M2 screw heads. Using a 1.5mm Allen remove the cold end blower, you may need to use flush cutters or tweezers to hold the M2 nuts from spinning.
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Step 6: Prepare Part Cooling Duct
Snap off the support and brim from the duct
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Using a knife or file, clean the edges of the duct from excess plastic
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Reusing the previous M2 hardware, fasten the cold end blower to the new duct, and smooth down the magnetic shielding foil.
Step 7: Install fans
Reusing the previous M3x35mm screws, fasten the part cooling fan to the new duct, noting wire orientation.
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Reusing the previous M2 hardware, fasten the cold end blower to the new duct, and smooth down the magnetic shielding foil.
Step 8: Install fan assemblies
Use the M3x35mm screw to mate the two Cold end and Part Cooling Assemblies together as one, but do not protrude the threaded side of the screw past the printed parts.
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