# Problem with my Z **URL:** \ **Category:** General Chat\ **Created:** [July 15, 2023, 5:25am UTC](https://forum.avidcnc.com/t/problem-with-my-z/2246 "2023-07-15T05:25:35Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![JeffsDesign](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.avidcnc.com/jeffsdesign/32/5574_2.png) [@JeffsDesign](https://forum.avidcnc.com/u/JeffsDesign)\ **Post date:** [July 15, 2023, 5:25am UTC](https://forum.avidcnc.com/t/problem-with-my-z/2246/1 "2023-07-15T05:25:35Z")
Hi guys, earlier this year I was struggling with two projects the z would drop and cut to deep. So today I downloaded Mach 4 update an got that running and jogged the machine around with the arrow keys. Took the z up an down about 10 times and it stopped going up So I took it apart an found one bolt loose in this photo (these are called Oldham couplings) ![20230714_214844](https://canada1.discourse-cdn.com/flex027/uploads/avidcnc/original/2X/2/2ea73f22e0c3305500c1710ec24ff40343d11d9a.jpeg) So what im thinking of doing is taking the bolt out putting some Loctite on it does that sound good or should I be looking for something else? One other thing is i don’t see any grease fittings on these small blocks how do you grease them? Looking at the back of that bolt hole it doesn’t look like its machined very good ![20230714_214913](https://canada1.discourse-cdn.com/flex027/uploads/avidcnc/original/2X/2/29eb36d59ceab2faa13f8b757c3ad80ef405c2fa.jpeg) ---
**Author:** ![subnoize](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.avidcnc.com/subnoize/32/2197_2.png) [@subnoize](https://forum.avidcnc.com/u/subnoize)\ **Post date:** [July 15, 2023, 4:25pm UTC](https://forum.avidcnc.com/t/problem-with-my-z/2246/2 "2023-07-15T16:25:31Z")
Don’t worry, it will work loose even with the loctite. Put it on your checklist. I check it at least twice a month. ---
**Author:** ![JeffsDesign](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.avidcnc.com/jeffsdesign/32/5574_2.png) [@JeffsDesign](https://forum.avidcnc.com/u/JeffsDesign)\ **Post date:** [July 15, 2023, 4:54pm UTC](https://forum.avidcnc.com/t/problem-with-my-z/2246/3 "2023-07-15T16:54:27Z")
Okay thanks!! Yeah these are small bolts an super fine thread its no wonder! Its working now!! 😁