# Z Linear Guides Coming Loose

**URL:** <https://forum.sienci.com/t/z-linear-guides-coming-loose/3542>\
**Category:** 🧠 New Wisdom\
**Created:** [August 26, 2021, 4:58pm UTC](https://forum.sienci.com/t/z-linear-guides-coming-loose/3542 "2021-08-26T16:58:38Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![FBWoodcraft](https://forum.sienci.com/user_avatar/forum.sienci.com/fbwoodcraft/32/6411_2.png) [@FBWoodcraft](https://forum.sienci.com/u/FBWoodcraft)\
**Post date:** [August 26, 2021, 4:58pm UTC](https://forum.sienci.com/t/z-linear-guides-coming-loose/3542/1 "2021-08-26T16:58:38Z")

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After using my Longmill for awhile, I notice I could move my Router down with my hand. Then I notice one of the Linear bearing mount screws coming loose.  
Since the X/Z mount comes preassembled and the installation guide didn’t say to check torque on the assembly screws I didn’t, so I can’t say for sure it they were tight to begin with.  
So, since one was loose I checked as many as I could get to and found that all of the bearing and rail mount screws were all loose. Unfortunately you have to remove the X/Z assembly in order to retorque them, which is what I did. Even though the screws use lock washers, I removed them first and installed with locktite to help insure they stay tight.  
You don’t have to remove the X rail to get it off, after taking the router off you only need to remove the upper V rollers and it comes right off.  
This gives you a chance to check them (as well as the Backlash tensioners) and reset the v-wheel tension on re-installation.