Severe vibrations in my bush hog

[WishboneW]

Think I may have solved it. What is different about these 2 blades?

 

[Yelpu1]

From the angle of photo the bottom blade looks thicker. That would definitely cause a vibration.

 

[WishboneW]

From the angle of photo the bottom blade looks thicker. That would definitely cause a vibration.

One weighs 2 lbs less and is narrower

 

[buckmanmike]

Is this the first time you have used the mower? If last use was fine, I would think something else is the culprit. Blades are cheap to replace. Hope replacement cures your problem.

 

[WishboneW]

Is this the first time you have used the mower? If last use was fine, I would think something else is the culprit. Blades are cheap to replace. Hope replacement cures your problem.

Have had the problem for a while. Just have not used it much

 

[livinoutdoors]

Look at the u joints on the drive shaft. Just to be sure.

 

[davidhelmly]

Andy, make sure the big nut that holds the stump jumper onto the shaft is super tight, if it’s loose it will cause a heck of a vibration!!

 

[Buck70]

Andy, make sure the big nut that holds the stump jumper onto the shaft is super tight, if it’s loose it will cause a heck of a vibration!!

Yes it will.

 

[WishboneW]

Look at the u joints on the drive shaft. Just to be sure.

New joints and shaft

 

[Bucaramus]

Had mine sharpened last year and the tech put one blade on right and the other upside down. Talk about a vibration!

 

[WishboneW]

Andy, make sure the big nut that holds the stump jumper onto the shaft is super tight, if it’s loose it will cause a heck of a vibration!!

Nut is a castle type with cotter pin. I cannot wiggle the stump jumper.

One of the blades is narrower than the other and weighs 2 lbs less.

I’m going to hook it up and run it without the blades to see if that helps the vibration

 

[sleepr71]

Make sure you haven’t caught some cable,or barbed wire & wrapped it around the gearbox shaft/stump jumper. Just curious…when’s the last time you sharpened those blades....???

 

[Jimmypop]

If you know someone who owns a grinder you should be o k .

 

[WishboneW]

Make sure you haven’t caught some cable,or barbed wire & wrapped it around the gearbox shaft/stump jumper. Just curious…when’s the last time you sharpened those blades....???

I sharpened them about 12 years ago when I got it.

Shaft and all turn freely by hand. As near as I can see within removing the jumper assembly there is no cable or wire around the shaft. No dents in the jumper and the gap between the deck and top of the jumper appears uniform

 

[tr21]

Just go to tractor supply and get new blades. If one is 2 lbs heavier that the other that's your problem

 

[sleepr71]

Just go to tractor supply and get new blades. If one is 2 lbs heavier that the other that's your problem

Yep. You’ve already taken the old ones off. May as well go back with fresh blades & be done. Keep the old ones as backup..

 

[WishboneW]

Yep. You’ve already taken the old ones off. May as well go back with fresh blades & be done. Keep the old ones as backup..

That’s the plan. Probably go to Agrisupply though.

 

[earlthegoat2]

Has it always vibrated?

Did it start suddenly or get worse over time?

 

[Crakajak]

While the blades are off check the output shaft for any side to side movement.Then I would install new sharp blades.Keeping the blades sharp helps keep them from wearing on the gearbox output shaft.....If it was mine.

 

[WishboneW]

Has it always vibrated?

Did it start suddenly or get worse over time?

Got worse over time