Kubota L3710 overrun clutch worn out

[13135]

Please, someone tell me how best to reach and remove the overrun clutch inside my Kabota L3710 HST. The PTO has no power, and I do not hear the clicking of the over run clutch when the brush hog mower is spinning faster than the engine. I lost power to the PTO all at once, not over some time like when clutch disks ware out and start to slip. I have a shop manual and have been studying it. Can the repair be done from the back PTO shaft cover or will I half to take apart the tractor. Thank You for help in advance.