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2A. MK3S+ extruder disassembly

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2A. MK3S+ extruder disassembly

2A. MK3S+ extruder disassembly
Relevant for:
MMU2S
Last updated 8 months ago
2A. MK3S+ extruder disassembly
 Difficulty
Moderate
 Steps
10
 Available languages
CSPLDEESITFR

Step 1 Preparing the printer

Preparing the printer
Preparing the printer
Before you start, make sure that:
⬢the filament is unloaded from the hotend
⬢the printer is properly cooled down
⬢print head is at a height it is easily accessible at.
⬢the printer is unplugged
⬢you removed the steel sheet
This chapter is dedicated only to the MK3S+ owners.

Step 2 Releasing the cable bundle

Releasing the cable bundle
Releasing the cable bundle
Releasing the cable bundle
Releasing the cable bundle
MK3S+ and MK3S+ MMU2S extruders are very similar, just a few parts will be changed. The most important is, we need to release the cable bundle.
⬢Using an Allen key release the M3x40 screw and open the door.
⬢Release two M3x10 screws and remove the extruder-cable-clip. On older printers cut the zip tie.
⬢In case there are zip ties inside the Einsy-case, carefully remove them.
⬢Remove the zip ties on the cable holder.
⬢Keep the textile sleeve on the cables, but make sure the cable can slip inside. It might be twisted around other cables, in such case, you have to remove the sleeve.

Step 3 Unplugging the IR filament sensor cable

Unplugging the IR filament sensor cable
Unplugging the IR filament sensor cable
⬢Carefully unplug the IR filament sensor cable and make sure it is free inside the electronics box.
We need to gently pull the IR filament sensor cable slightly towards the extruder as the sensor will be in a different position. Make sure the entire path of the cable is free. However there is no need for a complete disassembly.

Step 4 X-carriage-back disassembly

X-carriage-back disassembly
X-carriage-back disassembly
X-carriage-back disassembly
⬢Release all four M3x10 screws on the X-carriage-back. You can keep them in the printed part.
⬢Move the X-carriage-back back about 10 mm (0.4 inch) to ensure the cables can move back and forth.
While releasing other screws in the next steps, make sure to check each screw is still holding all the parts. If you release the screws above certain level, the entire body will fall apart.

Step 5 FS-cover and hotend fan disassembly

FS-cover and hotend fan disassembly
FS-cover and hotend fan disassembly
FS-cover and hotend fan disassembly
FS-cover and hotend fan disassembly
⬢Release the M3x10 screw and remove it.
⬢Remove the FS-cover it will be replaced with a new one.
⬢Release the screw holding the idler, you can leave it in the extruder.
⬢Release the M2x8 screw, carefully unplug and remove the IR filament sensor. Keep it safe, you will need the sensor for the reassembly.
Be careful with the filament sensor, do not touch the components on the PCB. Hold the PCB by its sides.
⬢Release both M3x40 screws, just few turns to create about 0.5cm (0.2inch) gap in the extruder body.
⬢Release and remove all screws holding the Hotend fan. We need to reach a screw behind the fan.

Step 6 Extruder-body release

Extruder-body release
Extruder-body release
Extruder-body release
⬢Find a M3x10 hidden behind the fan and release it slightly, few turns are enough. Our goal is to keep the parts connected.
⬢Repeat the same procedure on the other side of the extruder.

Step 7 Extruder-idler disassembly

Extruder-idler disassembly
Extruder-idler disassembly
Extruder-idler disassembly
Extruder-idler disassembly
⬢Release and remove the M3x40 screw, the idler with the Bondtech gear will fall out.
⬢Remove the Extruder-idler from the printer.
⬢Release the other M3x40, but again just slightly to create a gap between the parts. We want to keep the entire extruder together.
⬢Using the Allen key (2.5 mm) push the Adapter-printer part up. Keep in mind there is a steel ball inside.
We will replace Adapter-printer part and the steel ball with a new part.

Step 8 Extruder-idler disassembly

Extruder-idler disassembly
Extruder-idler disassembly
⬢Using the Allen key (2.5 mm) push and pull out the shaft. Keep it for later.
⬢Take out the Bondtech gear, BUT BE CAREFUL, there are two bearings inside. Don't lose them!!!
The printed part will be replaced with a new one.

Step 9 Haribo time?

Haribo time?
Haribo time?
⬢Not yet! Rewards are only for those who build a printer. Wait for the next chapter ;)

Step 10 Testing, testing!

Testing, testing!
Testing, testing!
⬢Grab the wires of the IR filament sensor cable and gently pull up, the cable should slide without significant resistance.
⬢Does it move? Great the test is over for now ;)
Don't pull hard! Ensure first that all screws are released properly.
⬢Great! We are done here, let's move to the assembly chapter.
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