Take the print head housing and place it in the slots of the thinnest part 8B (4mm). Make sure the right side of the print head is placed at the side with the two smallest holes.
Take the aluminium hot end holder with the two hot ends and guide the cable of the print head fan through it. Ensure it goes through the same hole as the cables of the new hot end.
Guide the print head cables (thermocouple sensors, heater cartridges and print head fan) through the thicker wooden part 8B (6mm).
Now, guide the cables through the 2 biggest holes of the other part 8B and through the print head housing.
Take the TOP part and guide all the cables through the middle hole. Make sure the black injection molded part is positioned above the two hot ends.
Place the bottom part 8B on the aluminium hot end holder and ensure the two teflon couplers completely fit into the holes of the wooden part.
Put the wooden part TOP on the print head housing.
Now tighten the bolts of the print head housing completely.
Place the two tube coupling collets into the holes of the black injection molded part.
Take the two bowden tubes and place the sides without the blue tape into the tube coupling collets on the print head. Push through the print head housing and the thin part 8B, until approximately 10 mm is sticking out.
Place the corrugated spring washers around the ends of the bowden tubes.
Put the two wooden parts 8B on each other and make sure the bowden tubes are fully inserted into the teflon couplers.
Place two thumb screws through the right side of the print head housing, through the injection molded part. Screw them into the aluminium hot end holder.
Take the other two thumb screws and place black spacers around them. Put these thumb screws through the left side of the print head housing and screw into the aluminium hot end holder.
Place the clamp clips around the tube coupling collets to lock the bowden tubes in place.
Position the fan on the left side of the print head and attach with two M3x16 bolts to the aluminium hot end holder.