OutdoorKing Repair Forum Forums Repairs and Maintenance Questions On Ride On Mowers Questions on Greenfield Ride On Mower Frames Greenfield Ride-on - Vibration Problem

Hello to all,
I have a Greenfield Ride-On Mower with an annoying cutting system vibration problem. Machine is a Fastcut 34 inch, with B&S 26 HP Vee-Twin Power Plant. When the cutters are first engaged, (cold system so to speak), there is no undue vibration/noise from the cutting system. After only about 5 - 10 minutes of cutting duty, a quite loud vibration starts up and continues so long as the cutters are engaged. When cutters are disengaged, the cutter brake can be heard making intermittent contact with the cutter pulley for a few revolutions, and then all vibration stops.

I have checked for loose, cracked, or bent blades (x4) and found none. I can see no distortion in the cutting disk. There does not seem to be undue play or wear in the cutting system pulley bearings. The Cutter belt appears to be in good condition and properly tensioned.

Has anyone any experience of this type of behaviour, and, if so, what was the cause/cure?

Thanks in advance for any help.

mustang