Sickle Bar 451 New Holland Sickle Mower

[CalvinM]

I just bought a 451 New Holland Sickle mower, it s belt driven. It has a vibration, I was wondering what could cause this.
Is there a special setup in the bearing housing?

Thanks in advance,
Calvin

 

[sweettractors]

Usually, you would manually check the slack in the head by slowly moving the small pully back and forth, while watching all pivot points inside the drive head.There should be 0 play in the drive head. Outside chance the crankshaft is shot or input shaft could be bent. Look for a bearing out on the shaft the big pully is attached to. Let us know what you find? Ken Sweet