Bobcat ToolCat won't go into forward or back. The hydraulic loader works though?

the hydraulic temperature sender is typically located near the hydraulic oil cooler or the hydraulic tank. It may be mounted on the side of the oil cooler or tank, or it may be mounted on a hose leading to or from the cooler or tank.

The bobcats I have worked on do not have this feature.
Bobcat oil change hours reset
https://www.youtube.com/watch?v=vRMyylISKlc

Better sound
How to Reset Oil hour meter on a e50 Excavator The Bobcat Guy
https://www.youtube.com/watch?v=ueDKdAenZkU

Reset Service Interval - Quick Tip
https://www.youtube.com/watch?v=gMl0jSx_1Kw

servo coil under current

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What hydraulic fluid is needed for a Massey Ferguson 390 · MF135 Selling ...... Hydraulics quit working after installing Aux Hydraulic control valve. MF 135 lift

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Hi Joseph:
Usually hydraulic components will "self clear" any air in the system just by trying to cycle through the functions a few times.
Have to ask the question............
Did you remove and replace the hoses one at a time, or did you take them all off at the same time?
The reason I ask is............ Could there be a remote possibility that any of the hose onnection locations were switched?

Most likely a control valve is leaking. If it just comes down over a long period of time that is not unusual. Most all loader buckets will slowly drop when parked in raised position.

That's one of the first things that came to mind as I was reading through your post; that the system was air-bound. Are there bleeder valves on the system?

In any event here is a website where you can buy the service manual for your skidsteer; https://mypowermanual.com/shop/bobcat/bobcat-641-642-643-skid-steer-loader-service-manual-download-6566135-10-86/

Bics coil on control valve not unlocking. Broken wire, bad connection or bad coil

Ask here, they will find every Bobcat manual or schematics.

Your local bobcat dealer can order one just need serial #