I have a 3 pt 6 foot wide heavy duty Bush Hog brand rotary mower. It was a Township mower until they got a new one. This has happened 3 times in 6 years after about 50 hours of mowing each time. The nut holding the stump jumper and blade on comes loose and the stump jumper and blade then falls to the ground. After the second time I specifically asked them to torque the bolt to I think 180 foot pounds or factory spec whatever that was or lock tite it or spot weld the nut so it would not fail again. Well today the first time out for Spring mowing and the unit fell off in the first 50 feet of mowing. I recovered the lock washer and blade and stump jumper. The nut was not recovered and really unsure when it may have fallen off.
When I asked the shop again about this (the same one I bought it used from and that did all the work) they said this should not occur as the direction of the thread is such that it would tighten on rotation and not loosen.
The money I put in this on purchase and repairs etc. would have let me buy a light weight new unit but I had one of those once and it got beat to death so that is not an option. I cut mostly tall grasses but occasionally some trees up to nearly 3 inches in diameter. Many at 1.5 to 2.5. The tractor is 45 HP and is capable of the cuts as long as the trees are not too close together to bog it down. Then chain saw some.
Question- Why is this occurring? Hate to buy a new HD mower, quite expensive and a used one I may get another's troubles, maybe that is what I already have. I have used up 4 other mowers in the last 20 plus years just keeping my wood lanes , field edges etc. passable. Thanks
When I asked the shop again about this (the same one I bought it used from and that did all the work) they said this should not occur as the direction of the thread is such that it would tighten on rotation and not loosen.
The money I put in this on purchase and repairs etc. would have let me buy a light weight new unit but I had one of those once and it got beat to death so that is not an option. I cut mostly tall grasses but occasionally some trees up to nearly 3 inches in diameter. Many at 1.5 to 2.5. The tractor is 45 HP and is capable of the cuts as long as the trees are not too close together to bog it down. Then chain saw some.
Question- Why is this occurring? Hate to buy a new HD mower, quite expensive and a used one I may get another's troubles, maybe that is what I already have. I have used up 4 other mowers in the last 20 plus years just keeping my wood lanes , field edges etc. passable. Thanks