--- title: BL Touch Probe Swapping description: BL Touch Probe Troubleshooting --- [Skip to content](https://www.help.protosthetics.com/galileo/bl-touch-probe-swapping-pro#main-content) English Show submenu for translations ![ProtostheticsGalileo Logo](https://www.help.protosthetics.com/hubfs/ProtostheticsGalileo%20Logo.svg) Open main navigation Close main navigation - English Show submenu for translations - [Contact us](https://www.help.protosthetics.com/galileo/contact-us) [Contact us](https://www.help.protosthetics.com/galileo/contact-us?hsLang=en) How can we help you? - There are no suggestions because the search field is empty. 1. [Galileo by Protosthetics](https://www.help.protosthetics.com/galileo?hsLang=en) 2. [Hardware Troubleshooting & Maintenance](https://www.help.protosthetics.com/galileo/hardware-troubleshooting-maintenance?hsLang=en) 3. [Hardware Maintenance - Pro](https://www.help.protosthetics.com/galileo/hardware-troubleshooting-maintenance?hsLang=en#hardware-maintenance-pro) February 3, 2026 # BL Touch Probe Swapping ### Remove the Toolhead and BL Touch mount from the Printer 1\. Disconnect the cables from the following ports ![Top Cable](https://image.crisp.chat/process/original/?url=https%3A%2F%2Fstorage.crisp.chat%2Fusers%2Fhelpdesk%2Fwebsite%2Fbb61eef0a8622800%2Fimage_6tubed.png) ![Both Side Cables](https://image.crisp.chat/process/original/?url=https%3A%2F%2Fstorage.crisp.chat%2Fusers%2Fhelpdesk%2Fwebsite%2Fbb61eef0a8622800%2Fimage_13jw8nl.png)   2\. Undo the Two screws on the Top of the Toolhead as shown in the picture ![Two Back Screws](https://image.crisp.chat/process/original/?url=https%3A%2F%2Fstorage.crisp.chat%2Fusers%2Fhelpdesk%2Fwebsite%2Fbb61eef0a8622800%2Fimage_1cgj16t.png)     3\. Remove the Back screw from the toolhead, let us know if you don't have a thumbscrew ### Note: Be sure the toolhead has cooled down, before removing the backscrew 4\. After the Backscrew has been removed, the Toolhead will detach from the mount. ### Note: The screws can be left on the bed as the bed is magnetic.   ###### With the Toolhead and BL Touch Removed, let's move to remove the BL Touch Probe #### Note: Be Careful, the probe is very fragile 1\. Remove the Hex Screw from the BL Touch's Chamber using a 2.5 mm hex key   ![Removed Toolhead](https://image.crisp.chat/process/original/?url=https%3A%2F%2Fstorage.crisp.chat%2Fusers%2Fhelpdesk%2Fwebsite%2Fbb61eef0a8622800%2Fimage_v4xrzz.png)  ![Hex Screw to Remove](https://image.crisp.chat/process/original/?url=https%3A%2F%2Fstorage.crisp.chat%2Fusers%2Fhelpdesk%2Fwebsite%2Fbb61eef0a8622800%2Fimage_cm6iaf.png)     2\. With the chamber removed, let's remove the probe from the chamber, it should just slide out. ![Removed Probe](https://image.crisp.chat/process/original/?url=https%3A%2F%2Fstorage.crisp.chat%2Fusers%2Fhelpdesk%2Fwebsite%2Fbb61eef0a8622800%2Fimage_1dsdki3.png) #### Note: Carefully Disconnect the Cable on the side of the BL Touch Probe ![Disconnected Cable](https://image.crisp.chat/process/original/?url=https%3A%2F%2Fstorage.crisp.chat%2Fusers%2Fhelpdesk%2Fwebsite%2Fbb61eef0a8622800%2Fimage_1vxuge0.png)   3\. Remove the threaded stud and pop the probe out by using a smaller hex key #### Note: Remember how may times you turned the hex key to unscrew the stud, you'll need it for later ![Back Stud](https://image.crisp.chat/process/original/?url=https%3A%2F%2Fstorage.crisp.chat%2Fusers%2Fhelpdesk%2Fwebsite%2Fbb61eef0a8622800%2Fimage_1dqcaub.png)   ![Removed Stud](https://image.crisp.chat/process/original/?url=https%3A%2F%2Fstorage.crisp.chat%2Fusers%2Fhelpdesk%2Fwebsite%2Fbb61eef0a8622800%2Fimage_1sjlrsz.png)    ![Probe Removed](https://image.crisp.chat/process/original/?url=https%3A%2F%2Fstorage.crisp.chat%2Fusers%2Fhelpdesk%2Fwebsite%2Fbb61eef0a8622800%2Fimage_1ebnqzh.png)   4\. Insert the new probe and screw the threaded stud back in #### Note: Turn it in approximately how many times you unscrewed it. 5\. Reattach the BL touch into its chamber and screw the bolts back into the BL Touch Mount ![Probe Reattached](https://image.crisp.chat/process/original/?url=https%3A%2F%2Fstorage.crisp.chat%2Fusers%2Fhelpdesk%2Fwebsite%2Fbb61eef0a8622800%2Fimage_y96jji.png)   #### Note: Carefully Reinsert the cable you removed before into the probe   ### **With the BL Touch Probe Replaced, reattach the toolhead to the printer. Just reverse the initial steps to remove the toolhead from the Printer** 1\. With the toolhead reattached and everything plugged in, let's turn the printer on, and Select: Menu → Leveling → Self-Test   ![Menu](https://image.crisp.chat/process/original/?url=https%3A%2F%2Fstorage.crisp.chat%2Fusers%2Fhelpdesk%2Fwebsite%2Fbb61eef0a8622800%2Fimage_b1b8k9.png) ![Leveling](https://image.crisp.chat/process/original/?url=https%3A%2F%2Fstorage.crisp.chat%2Fusers%2Fhelpdesk%2Fwebsite%2Fbb61eef0a8622800%2Fimage_1fgy6go.png)  ![Self-Test](https://image.crisp.chat/process/original/?url=https%3A%2F%2Fstorage.crisp.chat%2Fusers%2Fhelpdesk%2Fwebsite%2Fbb61eef0a8622800%2Fimage_m6hxke.png)   2\. Select Self-Test, and the Probe should extend and retract 10 times in total. ### Let us know if you have any questions during the process. 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