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Insert a screw through a washer.
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Insert the screw through the hole on the flat side (not the hex cavity side).
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Add the hex nut on the screw and tighten the screw.
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When the nut is full seated, you need to remove the screw being careful not to dislodge the nut.
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1. Unload the filament and allow the hot end to cool. Turn off the printer and remove the power plug.
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2. Protect the printing surface and use a tray to catch small components that might fall during the disassembly.
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3. Remove the m3x40 screw securing the Rambo/Einsy cover and disconnect all connectors from the extruder cable.
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4. Cut the zip ties and remove the screws clampling the extruder cable and remove the 3mm nylon filament. Completely unwind the cables.
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1. Cut the zip ties holding the extruder assembly to the linear bearings.
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2. Remove the timing belt. Replace if worn or damaged.
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3. Carefully pull the wires through the x-end assembly
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4. Tear down the entire extruder by reversing the assembly instructions provided by Prusa.
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5. All the printed parts will be replaced. Most of the electrical parts and fasteners will be reused.
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6. Check all wires and connectors for possible damage
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7. Check the PFTE tubes for possible damage.
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1. Remove the screws holding the z-tops in place.
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2. Pull the z-tops off the smooth rods.
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3. Remove the screws securing the trapezoidal nuts and spin those nuts to the top of the lead screws and remove them. They will be reused.
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4. Lift the x-end off the z-axis rods.
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5. MK2s and MK2.5 only: Remove the two M2x12 screws securing the x-end limit switch.
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6. Remove the three screws holding the x-end motor.
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7. Replace the rod tensioning screws with fully threaded M3x30 screws and drive out the smooth rods from the x-end-idler.
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8. Pull the rods out of the x-end-motor.
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Congratulations you have finished this chapter :-)
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Go to the next chapter: 2. X axis
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