Hi everyone.
I have a ZD21 with 2,887 hrs on it. This Kubota runs 20hrs a week. this mower been greased every time before it leaves the barn, and every month the gear box on the deck gets a oil change. and the trans oil and filter gets changed every 3 months.
Now this mower has had the transmission upgrade from left drive pump fail. and the tank mod to void anymore drive pump failers. that was at 800hrs.
The problem im having is the deck is vibrating really bad. so i changed
Blades, still vibrating(shaking). Removed belt. Belt was good. changed 50hrs ago. now when i removed belt i checked the deck bearings. only found one bad bearing on the top left. replaced bearing, hoping that was my problem, i started the mower agian. and still vibration as soon as i engage the pto. so i started removing the deck. and noticed that the blades were hard to spin. so i finished removing the deck and the deck moves free and smooth and the u joints on the pto shaft are good , not locked up or loose. now i put half of the pto shaft back on the trans and notice it was kinda tough to spin.
so i found out that the pto clutch assembly has a brake in it as well to slow the blades down faster. im starting to think this maybe my problem. like the brake in the clutch is locked up. so i guess what im trying to find out is the shaft suppose to have a lots of drag? (not running)
I have a ZD21 with 2,887 hrs on it. This Kubota runs 20hrs a week. this mower been greased every time before it leaves the barn, and every month the gear box on the deck gets a oil change. and the trans oil and filter gets changed every 3 months.
Now this mower has had the transmission upgrade from left drive pump fail. and the tank mod to void anymore drive pump failers. that was at 800hrs.
The problem im having is the deck is vibrating really bad. so i changed
Blades, still vibrating(shaking). Removed belt. Belt was good. changed 50hrs ago. now when i removed belt i checked the deck bearings. only found one bad bearing on the top left. replaced bearing, hoping that was my problem, i started the mower agian. and still vibration as soon as i engage the pto. so i started removing the deck. and noticed that the blades were hard to spin. so i finished removing the deck and the deck moves free and smooth and the u joints on the pto shaft are good , not locked up or loose. now i put half of the pto shaft back on the trans and notice it was kinda tough to spin.
so i found out that the pto clutch assembly has a brake in it as well to slow the blades down faster. im starting to think this maybe my problem. like the brake in the clutch is locked up. so i guess what im trying to find out is the shaft suppose to have a lots of drag? (not running)