mott 72 flail mower problems

[jonsstihl]

The one I need is the m-102792 and is 63 $ so count yourself lucky. but make sure it is the right one because a cheaper bearing may cost you twice as much because you will need to replace it with the right bearing soon. I can't wait to try mine either.

 

[Arc weld]

Yes to the Sealmaster bearings but get them from a bearing house rather than through Alamo if you want to save a few bucks. Just make sure it's the same bearing.

 

[jonsstihl]

I was wrong, I just got my parts from flail master and they sent me an sk 945 and it looks exactly like the m102792 in their catalog so the bearings with the set screws must be some other bearing.

 

[Steave]

I was wrong, I just got my parts from flail master and they sent me an sk 945 and it looks exactly like the m102792 in their catalog so the bearings with the set screws must be some other bearing.

I got Timkin ER-19 and they worked. Don't need the snap ring so just left it off. I guess thats the reason for the 2 grooves ? one for the snap ring and one for the grease hole. I also noticed some of the bearings have the spherical mounting (rounded) for the auto alignment but mine are flat and press fit into the holder.

I've used mine for about 2 hours one day then checked everything for excess heat. Gear box is the only thing getting warm but it would with the 1:4 ratio. Used for 3 hours another day and it done well so I've got it in the shop making a new debris flap for it and sharpened all the blades (184 of them boogers). My blades can be reversed and the ones on it have never been reversed but I just sharpened them while they were on the mower. I took the outside blades off and left them off because they rub the side plate. I read where this is a common practice.

Anyway I have to go down a gear lower than running my finish mower but if you're not in a hurry you get a lot better looking cut. No grass windrow, no tire tracks, no dried stims remain uncut. I'm not going to retire my finish mower but to me the flail does a neater job.

I made the debris flap out of EPDM roofing. It might not be thick enough but its weather proof. Haven't tried it since I put it on so we'll see. New one is I think $85 +..

Thanks for keeping us updated on your progress.

 

[jonsstihl]

I finally found some time to finish fixing it up and using it. works nice but I think 22 pto hp is on the low side for a 72 inch flail with dull knives. I also found a parts list for mine turns out mine is a vintage mott 72 HD model. it has the old style cuttershaft bearings mott 102792 aka sealmaster sk-945 and the old style roller with the tie shaft.

I had to flip two knives that were hitting the side of the mower on the pulley side. I think my shaft is not centered in the mower. the parts list states there should be two bearing spacers between the shaft and the bearings.