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1st time brush hog operation

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Jon from WI

07-17-1999 22:46:09




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After much time reading posts from this great list, I finally purchased a 5' KingKutter for my n. Safety is my main concern so I want to make sure I haven't missed anything. I installed the PTO adaptor & ORC and filled the oil in the gear box and greased all the lubrication parts. My two questions are:1) in the operators manual it clearly states in bold letters that the tractor pto drive MUST operate at a speed of 540 rpm ONLY. Can I assume that the pto is constantly at that rpm regardless of the speed of the tractor or the position of the throttle? and 2) is there anything wrong with engaging the pto and having the mower lifted at the same time, or should you engage the mower first and then set your height? Any other tips for a first timer would be appreciated. I have to admit that I did engage the mower briefly only to confirm that I hooked it up right, and It was quite intimidating to feel that much power from behind me. I am excited to put it to use, but want to be sure I havn't forgot anything. Thanks. Jon

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Rickstir

07-19-1999 11:55:36




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 Re: 1st time brush hog operation in reply to Jon from WI, 07-17-1999 22:46:09  
One of the nice things in life. Bush hogging! Your mind will wander from the everyday trials and tribulations, but don't let it wander from safety. Three or four hours on a good running bush hog will cure your ills! Good luck and let us know how it turned out....



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Mike C - Seven Fountains VA

07-19-1999 09:57:31




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 Re: 1st time brush hog operation in reply to Jon from WI, 07-17-1999 22:46:09  
Remember that things happen VERY QUICKLY. There's a lot going on behind you which can distract you from sudden danger ahead (e.g. low branches, concealed ruts, un-hoggable articles --my personal favorite so far was a little vine-covered reinforced concrete piling someone had thoughtfully installed in the middle of a field).

Depending on the transmission arrangement you have, you may not be able to engage/disengage the hog from the rear axle gearing while it is spinning. On my '48 8N, when I depress the clutch the hog acts like a flywheel and keeps driving the tractor ahead for about four seconds, even with full brakes (in my case that isn't much).

I am also new to this, and have had some close calls. I look at it like driving on the Santa Monica Freeway -- be sure you have room to maneuver right or left around a hazard if you spot one in heavy brush only 8 or 10 feet ahead of you, rather than planning on stopping short of it. Best to walk carefully over all new ground before hogging.

I rigged a pair of cable "preventers" with permanent attachments on the hog and caribiners on the tractor end which snap onto high fixtures which mounted on the rear end just above the top pivot of the three-point hitch (not sure if that's standard for 8N). The preventers go on with the hog raised, and allow it to drop to set mowing height and no lower. They also provide more shielding around the uncovered drive-shaft, which looks pretty scary.

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Ron from IL

07-19-1999 10:44:01




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 Re: Re: 1st time brush hog operation in reply to Mike C - Seven Fountains VA, 07-19-1999 09:57:31  
Mike,

Evidently Dell(WA) hasn't seen your post, or he would FLOG you serverely for not installing an overrunning coupler (ORC)! That's why the hog shoves you foreward when you try to stop. Please, invest in one and save yourself some headaches and possibly your life! Ron



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Chris (MN)

07-19-1999 06:22:29




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 Re: 1st time brush hog operation in reply to Jon from WI, 07-17-1999 22:46:09  
Jon,

I have an 8N and King Kutter 5' mower and cut in 1st gear with 1/2+ throttle.

When starting, I recommend setting the desired mower height first, then disengage the tractor PTO, before hooking up the mower driveline to the tractor PTO. Then engage the tractor PTO and slowly release the clutch pedal.

Also, there should be 1/3 overlap of the telescoping mower driveline. With the overrunning clutch, I didn't have much leeway, so I ended up cutting off 2 1/2" inches on each end of the driveline (plastic shell and metal shaft).

I highly recommend limiter chains and stabilizer bars.

Happy mowing!

Chris

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Jim (CA)

07-18-1999 20:20:02




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 Re: 1st time brush hog operation in reply to Jon from WI, 07-17-1999 22:46:09  
Set the front of the mower a little lower than the back. No sense cutting the grass twice.



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Sanford

07-18-1999 18:38:22




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 Re: 1st time brush hog operation in reply to Jon from WI, 07-17-1999 22:46:09  
Jon, Sounds like your about ready to take off there but please remember that this is a job you have to do by yourself. These things can throw heavy debris a pretty good distance. Our 8Ns give us plenty of fun, but we must always think of safety first. Not only our own, but those around us as well.

Sanford



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geo in MI

07-18-1999 07:36:48




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 Re: 1st time brush hog operation in reply to Jon from WI, 07-17-1999 22:46:09  
Okay, Jon, you're gonna climb up in the seat and take off through the field and woods..... ...it is good that you feel intimidated. Practice, practice, practice..... ....Find a flat spot, with few weeds, bushes, and rocks, first---and no slopes. Make a few passes and turns befre you go out to conquer the heavy stuff. If the ground is new to you, too, maybe you should walk it first to look for rocks, old fence posts(especially steel ones), wire, and stumps. If it's scary now, just wait till you get into the tough spots and that spinning blade starts hitting things. Easy does it, and get a habit started that you never, never, ever climb down off the seat with that thing spinning. Easy does it, and good luck.

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jdfred

07-17-1999 23:36:59




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 Re: 1st time brush hog operation in reply to Jon from WI, 07-17-1999 22:46:09  

on an 8n 540 rpm PTO speed is at about 2000 rpm engine speed. but the high governed speed on an 8n is about 2200 rpm. the rpm on a bush hog is not that critical but you may want to back off a little from the wide open throttle position. the 540 rpm Pto speed is critical for some equipment such as combines and corn pickers. the pto speed can be checked with a hand held tachometer at the pto shaft. the throttle is adjusted until 540 rpm ias attained and a mark can be made on the throttle lever plate for reference. if you are using an 8n, the small lever under the right side of the seat should be in the verticle position, this puts the hyd system is position control and it will be easier to control the cuttting height of your mower. also stabilizer bars are quite helpful to keep te bush hog centered behind the tractor.the cutting height is usually adjusted with the mower running since the pto has to be on for the hyd to work, but be careful about raising the bush hog all the way up, some pto drivelines will rub on the front edge of he bushog frame damaging the driveshaft safety shield

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Jerry Kirkpatrick (TN)

07-18-1999 11:45:01




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 Re: Re: 1st time brush hog operation in reply to jdfred , 07-17-1999 23:36:59  
Jon,

For what it's worth, my 8N operator's manual says that 1500 engine rpm = 545 pto rpm. If you don't have a proofmeter (tachometer) on your N, use your ears and the seat of your pants. Neither the tractor nor the rotary cutter should sound like they're working hard at the proper operating rpm. It's actually a pretty laid back, mellow sound. When you've selected the proper ground speed (chosen the right gear) for the cutting conditions, it all comes together and work becomes fun...just you and the tractor...notice the sound of the engine when the governor does it's thing as you encounter some tough grass or a slight grade.

Have fun and be careful.

JK (TN)

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