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  1. #1
    Elite Member
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    Jul 2006
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    3,017
    Location
    Meridian Idaho
    Tractor
    Kubota B7100D

    Default Back blade crack repair and reinforcement

    I got this light-duty back blade with my tractor a few years ago. It is pretty light weight and was already starting to crack back then... which is probably why he threw it in with the tractor. The blade seems to be made of 8 gauge or so but the cutting edge is 3/8. The blade started to crack out around the lower welds and moved up the sides of the bracket. No idea what brand it is.

    I ground the cracks out, moved things back into place with a jack and chains and re-welded the front and ground down the welds so they wouldn't interfere with dirt or snow 'rolling' on the blade. For the back however I decided to stiffen it up a bit I recently bought almost two full sheets of 'drop pieces' 1/4 sheet for $140.... which is about 50% off buying two full sheets. (3) 2x4 pieces and (3) 20 x 96 pieces. Somewhat rusted but a flap disk takes care of that pretty fast. You can see some laying on the floor in the background. Naturally I decided to use this to make a doubler plate for the blade (when all you have is a hammer.... )

    Here is the plate I cut out using my plasma and laying on the blade for a test fit/mark the lines sand for welding. The blade is sitting up on an old cabinet and you are looking down on it. This gave me a nice level work space... not that it helped my ability to weld much The small holes were drilled with a 1" HF Silver and Deming drill bit.

    -021-jpg

    Here is the plate by itself... I really need to buy a circle cutter attachment for my plasma... cutting nice looking circles free-hand is hard I rounded the corners by cutting around a piece of 2 1/4 pipe and touching them up with a 7" grinder... if you don't have one of those you should get one... it removes some metal in a hurry!

    -022-jpg

    And here she is welded on, I left space to make multiple passes around the old bracket to tie the doubler to the bracket and blade.

    -031-jpg

    The piece of tubing going up to the swivel plate was starting to bow out on the back... so I 'persuaded' it back in line and also made a doubler plate for it... I will take more pics after the primer dries and I get it back in service.... we are expecting snow tonight and for the next two days or so. I wanted to get this done just in case I need it.

  2. #2
    Veteran Member MJPetersen's Avatar
    Join Date
    Feb 2007
    Posts
    1,255
    Location
    Warsaw, Poland
    Tractor
    YM 1510-D

    Default Re: Back blade crack repair and reinforcement

    That is a very pretty reinforcing plate. You will have a factory looking blade. A blade like this takes a lot of force when you snag a corner on something immovable. The twisting force is tremendous. I know that I have sheared of hard 1/2 inch bolts in the angling adjustment of mine.

    Mike
    "In all your ways acknowledge Him and He will direct your paths." Solomon
    YM1510D, YM 1202 tiller, The following home made tools: Quick Hitch, KK copy dirt scoop, imitation Gannon rollover box blade, Forks on 3pt, a Rear Blade with gauge wheels and a 1.5 yd dump trailer.

  3. #3
    Veteran Member Deano's Avatar
    Join Date
    Oct 2008
    Posts
    1,201
    Location
    Southern Maryland
    Tractor
    Kubota BX24

    Default Re: Back blade crack repair and reinforcement

    Charlz,

    Looks good and lasts a long time!!

    Deano
    Deano
    2006 BX24, 6' Modern Implements rake, Woods RB60 rear blade, Wallenstein thumb, Bro-Tek rear skid plate, home made front skid plate, W.R. Long flat tooth bar, 4' finishing mower (TPH), 4' box blade, post hole digger, New style seat!!!!!, Agri-Fab drop spreader.

  4. #4
    Elite Member
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    Jul 2006
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    3,017
    Location
    Meridian Idaho
    Tractor
    Kubota B7100D

    Default Re: Back blade crack repair and reinforcement

    Quote Originally Posted by MJPetersen View Post
    That is a very pretty reinforcing plate.
    Thanks!

    Quote Originally Posted by MJPetersen View Post
    You will have a factory looking blade. A blade like this takes a lot of force when you snag a corner on something immovable. The twisting force is tremendous. I know that I have sheared of hard 1/2 inch bolts in the angling adjustment of mine.
    Yeah I think plowing snow with it is harder on it than grading dirt... I've snagged more than a few frozen solid rocks and I am sure that is what the previous owner did as well. The tractor, blade and a snowblower all came together from a part of Idaho north of here that gets quite a bit more snow than we do.

  5. #5
    Elite Member
    Join Date
    Jul 2006
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    3,017
    Location
    Meridian Idaho
    Tractor
    Kubota B7100D

    Default Re: Back blade crack repair and reinforcement

    Quote Originally Posted by Deano View Post
    Charlz,

    Looks good and lasts a long time!!

    Deano
    Thanks and I hope so! I will probably drag it out of the shop and get it hooked up tomorrow... 3-5 inches predicted over next two days.... might even get a chance to try it out!

  6. #6
    Veteran Member MJPetersen's Avatar
    Join Date
    Feb 2007
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    1,255
    Location
    Warsaw, Poland
    Tractor
    YM 1510-D

    Default Re: Back blade crack repair and reinforcement

    Quote Originally Posted by charlz View Post
    Yeah I think plowing snow with it is harder on it than grading dirt... I've snagged more than a few frozen solid rocks and I am sure that is what the previous owner did as well.
    What I have done to put force on things is to be cruising along with a load of sand or loose topsoil and snag a tree stump with the corner. I have hooked a gate stop or two also.

    Mike
    "In all your ways acknowledge Him and He will direct your paths." Solomon
    YM1510D, YM 1202 tiller, The following home made tools: Quick Hitch, KK copy dirt scoop, imitation Gannon rollover box blade, Forks on 3pt, a Rear Blade with gauge wheels and a 1.5 yd dump trailer.

  7. #7
    Elite Member
    Join Date
    Jul 2006
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    3,017
    Location
    Meridian Idaho
    Tractor
    Kubota B7100D

    Default Re: Back blade crack repair and reinforcement

    Finally got a change to post the 'done' pics Here is the blade all welded, primed and mounted on the tractor. As you can see I got it done just in time for it to start snowing.... and it hasn't snowed since

    -001-jpg

    -003-jpg

    Hopefully it will last another 30 years or so if nothing else I've improved the scrap value

  8. #8
    Veteran Member gerard's Avatar
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    Apr 2000
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    1,681
    Location
    Syracuse NY
    Tractor
    Kubota L2500DT w/FEL

    Default Re: Back blade crack repair and reinforcement

    Nice work. Reminds me of a post I just replied to re: light duty vs med/heavy duty blades. Someone had mentioned a light duty was fine up to about 25 hp. I of course disagree as my tractor is only about 27 hp but I know the force it exerts on a 7 foot blade when a corner snags a rock or root. If you can't break traction before bending something, the implement is too light. Light duty may be ok for snow and loose material, not for any dirt work. Plasma cutter huh? Been on my wish list for awhile now. Would be sweet........

    Experience is something you get right after you need it!

    Kubota L2500 DT w/ 5 foot FEL and Pat's easy change system
    5ft box blade, 5ft bushhog, 6ft york rake w/ guage wheels, 7ft backblade w/skid shoes , post hole digger, 5 foot snowblower, dual axel 16 foot landscape trailer, 330 gal water tank, Ford 250 diesel, 6 wheel drive polaris ranger, bale spears for loader

  9. #9
    Super Member JB4310's Avatar
    Join Date
    Feb 2005
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    5,645
    Location
    Central CT
    Tractor
    J.D. 4310 E-hydro

    Default Re: Back blade crack repair and reinforcement

    Looks good, and should hold up to most anything you throw at it now.

    JB.
    JD 4310; E hydro, 300CX, 48 BH, 60" box, 72" rake, 72" rear blade, cast pallet forks, 48", 61"HD & 73" high volume bucket.
    FORD 1700; 2 WD, 2600 hrs.
    JD 320; Hydra lift, 48" deck and 48" snow blade.
    2007 Dodge Ram 3500, Cummins 6.7L, Aisin 6 speed, 9ft utility body.

  10. #10
    Gold Member Jimmy Joe's Avatar
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    Aug 2008
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    343
    Location
    Medford Wisconsin

    Default Re: Back blade crack repair and reinforcement

    Nice job, wish I could weld with consistency. Your blades hould be a lot more rigid now.

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