I am not sure about the R22, but on the R44 there is a clutch actuator test plug tool (MT558-1) that you use on the 100hr inspection.
I remember that I overheard a conversation a long time ago where the guy asked for a tool at RHC, just in case his clutch on a Raven I wouldn't engage anymore. Call your maintenance center, they will know what I am talking about.
You can also use a paperclip instead of the test plug. The test plug actually just short circuits pins 1-2 or pins 2-3, depending how you put it in. It's that unused
white plastic connector (click for image of how it kind of looks like) that hangs out of the aft cowl door. It's fixed to the frame with some cable binders if I am not wrong. Ever wondered what that is for?
However, before doing anything like that I'd get confirmation from your mechanic. I've just heard about it, never used it myself. There could be more to it.