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  1. Gather the 0.4mm brass nozzle,
    • Gather the 0.4mm brass nozzle,

    • v6 heater block,

    • Prusa specific heat break.

  2. Make sure you orient the heater block so that the three holes are facing towards you.
    • Make sure you orient the heater block so that the three holes are facing towards you.

  3. Screw in nozzle all the way to check the threads. Unscrew the nozzle to leave roughly a 1mm gap between the nozzle and the heater block.
    • Screw in nozzle all the way to check the threads.

    • Unscrew the nozzle to leave roughly a 1mm gap between the nozzle and the heater block.

    • If don't leave enough of a gap you will risk creating a gap between the nozzle and heat break which can lead to leaking.

  4. Screw the heat break into the heater block. Only do this finger tight at this point, we will tighten it more later on.
    • Screw the heat break into the heater block.

    • Only do this finger tight at this point, we will tighten it more later on.

  5. Gather the Prusa specific thermistor.
    • Gather the Prusa specific thermistor.

    • Heater block assembly.

    • Hex wrench

    • M3 grub screw.

  6. Insert the thermistor cartridge into the heater block Fasten insert the M3 grub screw and gently tighten the screw to the point that the thermistor will not slip out. Do not over tighten the grub screw as this will crush the cartridge and will permanently damage the sensor.
    • Insert the thermistor cartridge into the heater block

    • Fasten insert the M3 grub screw and gently tighten the screw to the point that the thermistor will not slip out.

    • Do not over tighten the grub screw as this will crush the cartridge and will permanently damage the sensor.

    • Deformation of the cartridge can make it difficult to remove at a later date.

    • Cracking of the potting ceramic resulting in poorer thermal response or in extreme circumstances, short circuit.

  7. Gather the old heater cartridge
    • Gather the old heater cartridge

    • Gather the new heater cartridge.

    • If you are reusing the original heater cartridge you can skip this step. This is only for damaged heater cartridges.

  8. Remove the ferrules from the connector block by removing the screws in the connector block. Remove the ferrules from the connector block by removing the screws in the connector block.
    • Remove the ferrules from the connector block by removing the screws in the connector block.

  9. Insert the new heater cartridge ferrules into the connector block. Tighten up the up the screws. It's ok to slightly deform the ferrule to get a good connection.
    • Insert the new heater cartridge ferrules into the connector block.

    • Tighten up the up the screws. It's ok to slightly deform the ferrule to get a good connection.

  10. Gather heater block assembly.
    • Gather heater block assembly.

    • Gather 2mm hex key.

    • Gather M3 dome head screw.

    • Gather the Heater cartridge.

  11. Side the heater cartridge into the heater block.
    • Side the heater cartridge into the heater block.

    • Try to get an equal amount of space on both sides.

  12. Screw the M3 dome head screw into the block. The block should deform slightly, this is intentional to maximise the surface area contact. The block should deform slightly, this is intentional to maximise the surface area contact.
    • Screw the M3 dome head screw into the block.

    • The block should deform slightly, this is intentional to maximise the surface area contact.

  13. Gather Heater block assembly.
    • Gather Heater block assembly.

    • Gather the heatsink

    • Gather thermal paste.

  14. Apply the thermal paste on the long section of the Heat break only. Screw the heatsink on all the way. There will probably be some excess paste. Unscrew the heatsink again and remove any excess pate.
    • Apply the thermal paste on the long section of the Heat break only.

    • Screw the heatsink on all the way.

    • There will probably be some excess paste. Unscrew the heatsink again and remove any excess pate.

    • Screw the heat sink back on.

  15. To prep the PTFE tube please follow the Prusa guide: https://manual.prusa3d.com/Guide/How+to+...
  16. It's easier to hot tighten before mounting the HotEnd as the housing will get in the way. Connect the heater cartridge. connect the thermistor cartridge.
    • It's easier to hot tighten before mounting the HotEnd as the housing will get in the way.

    • Connect the heater cartridge.

    • connect the thermistor cartridge.

    • Set the temperature to 285°C and Hot Tighten.

    • Rest the HotEnd on a surface that is able to withstand 285°C ie nothing that will melt or burn.

    • Do not touch the HotEnd with your bare hands, you will burn your self.

    • Remove the PTFE tube and collet, there is no heatsink cooling fan working so the heatbreak/ heatsink will get hot.

Finish Line

Dan Rock

Member since: 06/07/2018

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14 Guides authored

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