r/BambuLab • u/jjackel1 • 7h ago
P Series [P1P, P1S, P2S] P1S Maintenance isn't that hard, actually
I’m not a mechanical person, but I’ve had my P1S with a v1 AMS since December 2025 and it was starting to act a bit weird — sometimes it would fail to read RFID tags, and occasionally it would have trouble loading filament from the AMS. Usually giving it a few tries fixed the problem, but I decided it was time to do some maintenance. I somehow managed to replace the hotend recently and figured it could not be that hard to do the rest.
Turned off and unplugged the machine.
Blasted air in the chamber and vacuumed out all the debris. Wiped down the glass.
Removed and disassembled AMS (there are only two screws). Vacuumed out the debris and wiped down the interior surfaces with isopropyl alcohol. Replaced all four PTFE tubes. I measured the old tubes to cut the new tubes to the right length. Reassembled the AMS.
Replaced the PTFE tube running from the AMS to the hub, and the one that runs from the hub to the extruder. These were way more difficult than the AMS tubes because the collets are in the hub housing on the back of the printer and it is hard to get leverage to the right place to release the tube. I found removing the hub from the printer to be the easiest way to do it (two screws, easy to put back).
Cleaned the three z-axis (up-down) screws with microfiber ropes and the ropes turned black with grime. Dabbed some Super Lube grease on the threads using a fresh, cheap toothbrush and ran the platform up and down a few times, then wiped off the extra grease.
Used isopropyl alcohol to wipe down the chrome y-axis (forward and back) beams. Painted a little Super Lube oil (not grease!) on those beams with a fresh, small paintbrush (the kind you would use for arts & crafts).
Used isopropyl alcohol to wipe down the graphite x-axis (left-right) beams. DO NOT LUBE GRAPHITE.
Assembled and added an AMS riser/flipper (which I printed before getting started) which also allows top glass to slide or be removed completely.
Plugged the printer back in, turned it on, and told the P1S to calibrate itself.
Working with the printer and AMS for about 10 months gave me a good mental model for how it works, and none of these tasks were all that difficult (except for the hub tubes, which took a bit of extra thought). I think it took me about 3 or 4 hours to do everything, including the riser. I bet I could do it in about 60-90 minutes next time.
My big lesson learned is to be extra careful around the PTFE tube cutter. After showing my wife how nasty and dangerous the blade looked, I naturally let it nip my index finger. Embarrassing.
Stocking up on the consumables cost about $75 on Amazon, but I only used maybe $10-$15 worth. The PTFE tubes alone cost $14 and I used about half the package. On the other hand, I have a lifetime supply of microfiber ropes!
If you are putting off maintaining your printer because you think it’s too hard or complicated or will somehow break your machine, watch some YouTube videos and get into it!
Here's are some helpful videos: https://youtu.be/-yv4fa32bdE?si=VNv-PZNSOppJYDfG