Hi,
We had serious issues with our Alamo flail mowers chewing bearings out and wear due to salt on our plow trucks with the previous greases we were using. I would suggest Texas Refinery 880 C&C or C&C Moly for your application. I just got another JD HX7 cutter and the Deere grease is running out of it @ 6 hours. Use the same TRC greases on out new Deere 331G tracked skid loader with forestry head. With 100lb Timken rating I think you will be pleased. Stays where you put it and won't run out of the bottom of your grease gun. Vids on Youtube if interested.
Brian