I have had my 2003 Kubota from new. I did have a new clutch put in about 10 yrs ago because I thought it did not have a dry clutch and let the free play let out even though I constantly checked it on my 66 427 vette. I learned a lesson. This time no smell, good free play every thing was fine then for no reason I went to move it and nothing no feel vibration etc. I am down to the hydraulic clutch, friction clutch or F/R lever connection . I got a WSM today I would like some advice as to how to narrow it down. I have done all the obvious. New fluid, filter checked all electrical. I was going to next check a relief valve and crack a line to see if it is air locked. Any input would be appreciated. I am a very capable mechanic and was a car radio installer for 40 years. so I understand electronics. Bill