Contents of the Spare Parts Bundle for MK4/MK3.9

This spare parts bundle includes everything needed for maintaining and repairing Original Prusa MK4 and MK3.9 3D printers:

• Bearings: Complete set of 8 pre-lubricated bearings (6x LM8UU, 2x LM10LUU)
• Fans: Hotend fan and print cooling fan
• Hotend: Assembled hotend with 0.4mm nozzle including heater and thermistor
• Hotend heatsink: Assembled heatsink with strain gauge and filament sensor
• Thermistor: Thermistor set for the heatbed
• Accessories: Prusa Nextruder sock, 2x nozzle thumb screw, "Spare MK4" set (bearing shims, motor shim, thermal pads, various parts for the extruder assembly)
• Fan shroud: Print cooling fan shroud (printed from PCCF)
• Fasteners: Various replacement screws and nuts, 20x zip ties
• Cleaning: Cleaning needle and IPA swab
• Lubrication: Bearing lubrication kit

Compatibility and use

Compatible models:

• Original Prusa MK4
• Original Prusa MK3.9 (upgrade)

Note: Not intended for S models.

Follow the Prusa assembly manuals for your specific printer model when replacing parts. The bundle includes everything needed for routine maintenance and repairs, allowing you to keep your printer in optimal condition and minimize downtime.

Advantages of the spare parts bundle

• Convenience: All common spare parts in one place
• Time-saving: Immediate availability of parts for quick repairs
• Genuine parts: Guaranteed compatibility and quality
• Comprehensive: Covers mechanical, electronic, and consumable components

This spare parts kit is an essential add-on for every owner of a Prusa MK4 or MK3.9 3D printer who wants to ensure long-term, trouble-free operation of their device.