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  1. #11
    Platinum Member srjones's Avatar
    Join Date
    Mar 2006
    Posts
    542
    Location
    Columbia County, Oregon, USA
    Tractor
    Mahindra 2015HST & Mitsubish R1500

    Default Re: "brush hog" gear oil and level.

    Yup...it's to sharpen the blades. Right now they're so dull that they are perfectly rounded over.

    I thought about grinding them right on the brush hog, but I decided against for a few reasons.

    1. I'm going to have to take off a LOT of metal to get them sharpened.
    2. I'd have to do all the grinding croched over in various positions. I can feel my joints ache just thinking about it.
    3. If I take them off, I can do all the sharpening upright at a bench grinder or possible send them out to be done.
    4. (and most important) They can be balanced.

    But once I get them sharpened up right, I will use a grider to touch them up.

  2. #12
    Epic Contributor Soundguy's Avatar
    Join Date
    Mar 2002
    Posts
    47,319
    Location
    Central florida
    Tractor
    ym1700, NH7610S, Ford 8N, 2N, NAA, 660, 850 x2, 541, 950, 941D, 951, 2000, 3000, 4000, 4600, 5000, 740, IH 'C' 'H', CUB, John Deere 'B', allis 'G', case VAC

    Default Re: "brush hog" gear oil and level.

    On brushog blades.. you will find that the 'ballance ' issue is of little importance. 'Eyeballing' them is about as close as you need to be...

    Remember to restore the angle.. and that you don't need a sharp blade.. about 1/32 or 1/16 flat edge is fine...

    Soundguy

  3. #13
    Platinum Member
    Join Date
    Mar 2005
    Posts
    700
    Location
    Palmyra WI
    Tractor
    BX2230

    Default Re: "brush hog" gear oil and level.

    Yep - not sharp. I have a new spare set of blades for my 48" Befco and they are not sharp. As stated they are blunt as Soundguy noted.
    BX2230 w/ FEL to care for 21 acres of woods, hills, pasture and swamp, 800' driveway

  4. #14
    Super Member 3RRL's Avatar
    Join Date
    Oct 2005
    Posts
    6,808
    Location
    Foothills of the Giant Sequoia's, California
    Tractor
    55HP 4WD KAMA 554 and 4 x 4 Jinma 284

    Default Re: "brush hog" gear oil and level.

    Mine have chips and knicks (gouges) out of them. I was thinking of welding up the edge with some hard rod and then resharpening them?
    Rob-
    ...The Older I get...the Better I Used to be...
    Member of the Month

  5. #15
    Epic Contributor Soundguy's Avatar
    Join Date
    Mar 2002
    Posts
    47,319
    Location
    Central florida
    Tractor
    ym1700, NH7610S, Ford 8N, 2N, NAA, 660, 850 x2, 541, 950, 941D, 951, 2000, 3000, 4000, 4600, 5000, 740, IH 'C' 'H', CUB, John Deere 'B', allis 'G', case VAC

    Default Re: "brush hog" gear oil and level.

    Hard rod.. like surfacing rod? I've done that on cutting edges and tiller teeth.

    Soundguy

  6. #16
    Veteran Member
    Join Date
    Sep 2004
    Posts
    2,379
    Location
    Kansas, Butler county, Just east of DooDah
    Tractor
    Kubota L4200 GSTCA

    Default Re: "brush hog" gear oil and level.

    Like Soundguy said “85/140 wt oil in the gearbox.. though I'm sure 80w synthetic.. or 90w is FINE and won't hurt a thing.”

    I checked the temp before lube change, and after… before changing my finish mower gear box was 195 degrees… I switched to Mobil1 synthetic gear lube and the temp dropped to 128 degrees, same load same hot afternoon temp. Checked after An hour and a half run.
    The old lube, (Not synthetic) had around 2 years and about 100 hours. KennyV.

  7. #17
    Elite Member
    Join Date
    Mar 2006
    Posts
    3,059
    Location
    Wisconsin
    Tractor
    2003 NH TN70A

    Default Re: "brush hog" gear oil and level.

    Quote Originally Posted by KennyV
    Like Soundguy said “85/140 wt oil in the gearbox.. though I'm sure 80w synthetic.. or 90w is FINE and won't hurt a thing.”

    I checked the temp before lube change, and after… before changing my finish mower gear box was 195 degrees… I switched to Mobil1 synthetic gear lube and the temp dropped to 128 degrees, same load same hot afternoon temp. Checked after An hour and a half run.
    The old lube, (Not synthetic) had around 2 years and about 100 hours. KennyV.
    Put the dino back in and redo the test!
    Bob

  8. #18
    Veteran Member
    Join Date
    Sep 2004
    Posts
    2,379
    Location
    Kansas, Butler county, Just east of DooDah
    Tractor
    Kubota L4200 GSTCA

    Default Re: "brush hog" gear oil and level.

    I suppose that would be the best way to prove the synthetic running cooler… But my main reason to change was I am trying to switch everything I have to synthetic, (call me a believer).
    MY cars and trucks have always been synthetic, engine oils, trans, power steering, even break fluids… My mowers and tractors have all had syn engine oils… but I have not yet switched the hydraulic fluids yet to synthetic… that is in my plans for this year.

    This gear box was maybe over due for a lube change but I was surprised to see that much change in temp. KennyV.

  9. #19
    Elite Member RalphVa's Avatar
    Join Date
    Dec 2003
    Posts
    3,791
    Location
    Charlottesville, VA, USA
    Tractor
    JD 1025, previously Gravely 5650 & JD 4010

    Default Re: "brush hog" gear oil and level.

    I removed mine with a 6' piece of pipe put over the handle of my 3/4" driver. That hole will keep the socket in place to keep the blades from rotating.

    You'll need a couple of clamps to put the bolts and probably the stump jumper back on. Be sure and prop up the brush hog well. Don't rely on the 3 ph to hold it there. Crawl underneath and clamp bolt you're looking to put nut back on and (probably) stump jumper in place. If just the bolt, one clamp will do. If the bolts hold the stump jumper in place, you'll need a second clamp on the other side of the stump jumper.

    Use new nuts or retighten after 1 and 10 hours of use. Probably a good idea to check tightness after 1 and 10 hours anyway, new or old nuts. I just tightened until I could feel the nut becoming almost not able to turn with the 6' breaker.

    Ralph
    The natural gardener
    God's original intent

  10. #20
    Elite Member
    Join Date
    Mar 2006
    Posts
    3,059
    Location
    Wisconsin
    Tractor
    2003 NH TN70A

    Default Re: "brush hog" gear oil and level.

    Quote Originally Posted by KennyV
    I suppose that would be the best way to prove the synthetic running cooler…
    Put the dino back in and redo the test!
    Bob

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