Hay & Forage Forum banner
1 - 4 of 4 Posts

·
Registered
Joined
·
1 Posts
I bought a used 15' Woods 315HD to mow pastures. The right blades rotate clockwise when viewed from above, as they should. The center blades rotate counterclockwise as they should.
The left wing rotates clockwise but the but the blades are positioned to cut counter clockwise. There is a decal on the left wing that indicates the blades should rotate also counter clockwise. I'm guessing someone did a gearbox repair and installed something incorrectly. Any suggestions would be much appreciated so I don't start a project blind. The manual states "Blade rotation, viewed from top of cutter, is counter clockwise for center section and left wing".........Thanks
 

·
Senior Member
Joined
·
2,826 Posts
Years ago when Bush Hog had two piece gearboxes, some people would switch the tops of the wing gearboxes and the blades so the cutter would not windrow as bad. Can't tell you if it worked but it did not casue any problem.
 

·
Registered
Joined
·
3,006 Posts
Years ago when Bush Hog had two piece gearboxes, some people would switch the tops of the wing gearboxes and the blades so the cutter would not windrow as bad. Can't tell you if it worked but it did not casue any problem.
This is true, but with one caveat...

We had a 13.5 foot Bush Hog solid deck 3 spindle shredder that was reversed... those had an input gear spinning the center box bottom spindle gear and a cross-shaft gear to spin the outer two boxes. By reversing that center box cross shaft so the gear was swapped from left to right (or vice versa) it would automatically reverse the rotation of the outer two boxes. You just swapped the blades on the outer two boxes left to right and vice versa so the cutting edges faced the right way and you were good to go.

From the factory, the shredder was designed to rotate with the outer two boxes throwing toward the center, which causes a lot of windrowing and ups the HP requirements, since the center box is having to pulverize the stuff from the "wings" as well as cutting it's own center stuff, and usually doing a poorer job of cutting since some of the debris interferes with the center box cutting clean. Reversing them to throw to the outside reduces windrowing because the outside boxes' cut crap gets throw against the side, chopped up again, and thrown to the rear AT EITHER SIDE, instead of to the center from both sides. The center still throws to one side but it doesn't interfere as much as having BOTH sides throwing to the middle, especially in heavy stuff. This lowers the HP requirements a little and reduces the stress as well.

Well, it all works well and good, TO A POINT. That point happened to be that the outside boxes have a left-hand thread on one side so that the nut holding the shaft in the gear and bearings and that the stump jumper and blades attach to at the bottom wouldn't work loose. Of course reversing the rotation direction of the box then means that instead of the nut tightening under load, it's loosening under load... and loosen it did... worked loose and the whole blades/stump jumper/ shaft fell out of the bottom of the gearbox while we were shredding grain sorghum stalks one time.

The solution, after rebuilding the box, is to swap the outside boxes side-for-side so that the rotation direction matches the left hand or right hand shaft threads in the outer boxes...

SO, this is something to be aware of, depending on the design of your shredder... This was an older Bush-Hog brand, but it's quite possible other shredders/gearboxes are designed the same way.

Later! OL J R :)
 
1 - 4 of 4 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top