I can't answer it im trying to find it myself if anyone finds it plz let me know...
You don't. Hydraulic clutches are by their very nature self adjusting, if the clutch will not work correctly then you are low on fluid or have another problem.
Yes, all miata's have a hydraulic clutch.
It is by the brake master cylinder
The clutch master cylinder is supplied from the brake fluid reservoir via a rubber tube.
Dot 3 brake fluid
The clutch and brake cylinder share a common fluid reservoir.
Found it. This Manual transmission has a hydraulic clutch. The fluid resevoiri s on the firewall by the wheel well. Low fluid causes sticky/ hard shifting. Very low fluid cause no shifting. After filling with recommended DOT 3 brake fluid all is well. Except where the old fluid leaked out.
Just make it snug with an open end wrench and bleed the line to remove air (make sure fluid reserve does not get low while bleeding).
I'm pretty sure that is a hydraulic clutch, check and see if you have a resivoir under the hood for the clutch. If you don't then it is mechanical and then you can adjust it. Check owners manual
If it will go into gear when the engine is off but not when the engine is running, the clutch is not disengaging. It could be the clutch, possibly warped or put in wrong, or it could be the hydraulic clutch mechanism.
The only hydraulic fluid which is typically in a road tractor is the power steering fluid, and you simply fill that to the fill line on the reservoir. If it's been fitted with a PTO, that's an aftermarket system, and that, as well as the hydraulic tank, depends on who the aftermarket supplier is.
it is in the master brake bottle the clutch feeds threw the hose at the drivers rear of the brake bottle