Incomplete cut on rotary mower: Field Mowers Brush Cutters  -- Tractor Attachments Implements 3ph Discussion Forum and Review Incomplete cut on rotary mower: Field Mowers Brush Cutters -- Tractor Attachments Implements 3ph Discussion Forum

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 06-02-2002, 10:33 Post: 39251
Redmessage
2002-06-02 10:33:49
Post: 39251
 Incomplete cut on rotary mower

I just purchased a 6' Befco rotary cutter for my JD4300 to cut my 25+ acres of horse pasture. It gives a good clean cut everywhere but on the right side. The far right 6 inches cut fine, but the next 6-8 inches in are just shredded, not cut, and show up on the next round the pasture. Then I have to overlay the cutter to get this uncut portion and lose at least 1' of my cut area. This then adds to my cut time by 20%. I have tried different heights on the cut, made sure the deck is level, but still a problem. The grass is fairly deep and thick, but this uncut section shows up even in the thinner grass sections. It does appear to be where the tires track (R4's). Any ideas on how to fix? Thanks in advance.

Redman






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 06-03-2002, 06:31 Post: 39262
TomG

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 Incomplete cut on rotary mower

I don't have a cutter so there's no expertise here. I am aware that cutter often are adjusted so they angle down toward the front. My understanding is that they require less power when adjusted this way. It also might help the uneven cutting problem.






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 06-03-2002, 08:16 Post: 39267
Peters

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 Incomplete cut on rotary mower

If it is the tires and the laydown of the grass then normally it is the side that gets run over twice before cutting.
Options are:
Checking deck allignment - is one control arm or mount on the deck higher or lower than the other.
Blade speed - the vacuum action on a rotary cutter is low therefore the speed needs to be higher than normal. You may need to increase the tractors RPM to the PTO speed. Fortunately I have a 2 speed PTO on my tractor and can idle around the field and still cut fine.
Blade sharpness - rotary cutters are designed to cut large brush and weeds. They are not really intended to give a fine cut. Blades are shipped with dull blades designed to cut and shatter the larger trees. If you are cutting mostly fields you may need to sharpen the blades. I would suggest a dual edge approach with the original factory bevel and then a sharper angle on the tip to provide a sharp lower edge.






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 06-03-2002, 09:42 Post: 39272
DavidJ



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 Incomplete cut on rotary mower

I also think it may be the sharpening of the blades or the speed that's causing your problem. If I'm correct the rotation of the blades is clockwise therefore at that point cutting tip is moving the same direction the grass is laying and since the lift of those blades is not great, you're not lifting the grass enough to be cleanly cut. The reason that the outside is being cut correctly is that you have a few more seconds for the grass to right before passing the blade tips.






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 06-04-2002, 08:19 Post: 39301
treebone
2002-06-04 00:00:00
Post: 39301
 Incomplete cut on rotary mower

I had the same problem with my first tractor, a 21 HP CaseIH255 and a JD503 cutter. My second tractor and cutter does not have that problem. The difference is more HP and the new cutter, a Landpride 2572, has a cutout at the rear of the cutter housing. I would say that is probobly the reason it cuts better. The JD503 (new version is the JD513) always dumped the cuttings on one side, so it must have been clogged with clippings on that side, the rear discharge housing on the new cutter allows a cleaner cut. I suppose I could have cut out the back of the JD housing (it was light guage steel and crumpled up pretty bad anyway) and had the improved discharge.






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 06-04-2002, 13:30 Post: 39310
Murf

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 Incomplete cut on rotary mower

I believe that in most cases this is caused by a combination of factors, 1) the grass is getting too long between cuts, 2) it is being driven over before cutting, packing it down, and 3) it is being cut at too high a speed, most cutters work far better at slow speed, slower than most people are will to cut. On golf courses the 'roughs' are usually cut with a bat-wing type rotary mower and at a speed that is less than that at which you would take at a leisurely stroll, on an 8 speed gear box usually 3rd gear is used. Best of luck.






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 06-04-2002, 10:17 Post: 39312
Art White



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 Incomplete cut on rotary mower

Good call Murf.






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 06-04-2002, 11:42 Post: 39315
schwiers@schwier.info
2002-06-04 00:00:00
Post: 39315
 Incomplete cut on rotary mower

Did you purchase the BEFCO deck with the mulching kit and High Lift Blades? These two items help pick up the grass after it's been run over by the tires. My setup works great a Kubota B2710 Medium Range full speed with a BEFCO 72" C30 and sharp blades.

Look here http://befco.com/products/cyclone/c30optionals.html

High Lift Blades
The high suction flaps on these blades lift grass that has been bent by the tractor tires before cutting it. Sold singularly.






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 06-04-2002, 18:27 Post: 39317
redmessage
2002-06-04 00:00:00
Post: 39317
 Incomplete cut on rotary mower

The high lift blades are available for the finishing mower (C30), but are they available for a rotary cutter?






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 06-04-2002, 22:46 Post: 39323
Alan L



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 Incomplete cut on rotary mower

I have a Rhino 5' cutter and it does a great job. The only time there is any poorly cut grass it is right where you indicate. Seems like it is only particular species of grass - volunteer oats seems to be the biggest culprit. The only solution I have found is to slow down or overlap the way you are doing. Fortunately its seems I don't have this problem on most species of grass in my field, so I don't have to slow down or overlap that much. This is where the Hydro comes in real handy.






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Discussion Boards > Active Subjects > Messages as Posted > Field Mowers Brush Cutters Forum

Thread 39251 Filter by Poster:
Alan L 1 | Art White 2 | DavidJ 1 | Murf 2 | Peters 3 | Redmessage 2 | schwiers@schwier.info 1 | Todd Wilson 1 | TomG 2 | treebone 1 |

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