# X-Axis Gantry

The toolhead (which holds the extruder E-axis and hotend) rides on the X gantry. Similar to the Y-axis bed, the most common form of maintenance to be performed on the gantry is checking if the belt tension is right and tightening/loosening as necessary. You can read more about it here:

{% embed url="<https://help.prusa3d.com/en/article/adjusting-belt-tension-mk3-s_112380>" %}
Tensioning belts
{% endembed %}

![X carriage. Image from Prusa.](https://1820679795-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LXautSvCbUco5Lv7YrH%2F-MS0tDmsv5m0gt2SBRv3%2F-MS0vFk9pk6kydUUyVld%2Fimage.png?alt=media\&token=4724a79d-d6f1-48d9-8ada-f941e4b7bc3a)

Assembly and disassembly of the X-Axis also requires assembly/disassembly of the Z-axis as well. You can read more about this here:

{% embed url="<https://help.prusa3d.com/en/guide/3-x-axis-assembly_167854>" %}
X-Axis Assembly
{% endembed %}

{% embed url="<https://help.prusa3d.com/en/guide/4-z-axis-assembly_168629>" %}
Z-Axis Assembly
{% endembed %}