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Forum topic by Bertha posted 09-28-2011 02:53 PM 3193 views 1 time favorited 175 replies Add to Favorites Watch
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Bertha

12951 posts in 1330 days


09-28-2011 02:53 PM

Topic tags/keywords: mower brush hog bush hog gravely john deere

Really hoping someone can help.

My fiance hit a stump with our fancy John Deere push mower (<1> range that are more sturdy than the John Deere? Any help greatly appreciated. Thanks!!!

-- My dad and I built a 65 chev pick up.I killed trannys in that thing for some reason-Hog


175 replies so far

View ajosephg's profile

ajosephg

1850 posts in 2198 days


#1 posted 09-28-2011 03:06 PM

Hee hee – I guess you’re stumped, huh?

So, what all broke on the mower? I hit a big piece of steel with my fancy Toro once and all it did was ruin the blade because the blade clutch protected the crankshaft shear pin.

-- Joe

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pariswoodworking

380 posts in 1122 days


#2 posted 09-28-2011 03:11 PM

Lawnmower, What is a lawnmower? :) The grass doesn’t grow anymore down here so now they’re just novilties.
Was it just the blade to was damaged or did that stump really do a number on it?

-- Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. -- Albert Einstein

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Bertha

12951 posts in 1330 days


#3 posted 09-28-2011 03:14 PM

Thanks Joseph, a guy at work told me that the John Deere’s don’t have a crankshaft shear pin. Go figure. Nothing at all visibly broke, although I wasn’t there to see it. I’m told that she hit the stump and the motor stopped abruptly. It must have been violent because some of the plastic farings were displaced. When I flipped the mower over, the blade was touching the sheet metal housing at the periphery (bad sign). I took this to mean the blade was bent and took it off and laid it on my jointer bed. Looked relatively straight (and substantial; would make good plane blades). I balanced the blade on a pin and it looked well balanced. I started the mower with the blade off and it looks like the axle/blade mount shaft is wobbling. I reinstalled the blade and the machine vibrates violently. I thought maybe the whole motor had been jarred off its mounts, so I loosened those and there wasn’t really any play in the mount.

I’m pretty convinced the shaft is bent and that’s pretty much what the JD guy told my fiance over the phone. He said buy a new motor (thanks, dude, but it won’t be another $500+ John Deere).

If the Toro’s got a safety device that the JD doesn’t have, then it’s the front runner currently. I’m just wondering if i should spend the big bucks on a more commercial mower. Thanks again!

-- My dad and I built a 65 chev pick up.I killed trannys in that thing for some reason-Hog

View Dan's profile

Dan

3543 posts in 1518 days


#4 posted 09-28-2011 03:14 PM

Wait.. The John Deere didn’t mulch up the stump and spit a bunch of fine wood shavings out the side?

-- Dan - "Collector of Hand Planes"

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Bertha

12951 posts in 1330 days


#5 posted 09-28-2011 03:19 PM

I wish it did, Dan. It seems like a pretty common problem, given a quick Google search. Some guys seem to think you can order a new crankshaft and redneck it yourself.

-- My dad and I built a 65 chev pick up.I killed trannys in that thing for some reason-Hog

View ajosephg's profile

ajosephg

1850 posts in 2198 days


#6 posted 09-28-2011 03:26 PM

Hmm – We need to look at an exploded assembly diagram to see what parts are in there. What is the model #?

I can’t believe that there isn’t something there to protect the crank. The way its usually done is with a soft key in the blade to shaft connecting thingy.

-- Joe

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doyoulikegumwood

384 posts in 2630 days


#7 posted 09-28-2011 03:26 PM

bertha you may be able to do that but chances are your chasing a dream. Sadly there is more then likely more damage then just the crank shaft but what i would do if I were you is open up the motor and see if there is further damage.

At this point whats the worst you could do opening it up. my thought on it is you will find the bearings are shot and that you may not be able to get the crank shaft out of the crank case.

-- I buy tools so i can make more money,so ican buy more tools so I can work more, to make more money, so I can buy more tool, so I can work more

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Cosmicsniper

2199 posts in 1796 days


#8 posted 09-28-2011 03:32 PM

Al:

Yeah, likely a bent shaft. I’ve had that happen before to a commercial Snapper mower (Wisconsin-Robin engine) ...this was before they made them with sheer pins, of course.

The good news is that if you take off the engine and attach it to your bed, you have nifty, albeit loud, massaging bed…and you don’t even have to drop a quarter. Just keep a handy supply of two-cycle fuel. :)

-- jay, www.allaboutastro.com

View zindel's profile

zindel

256 posts in 1287 days


#9 posted 09-28-2011 03:33 PM

Sorry to hear about your mishap, however i would recommend watching CL. Especially this time of year there are always good mowers on there. And yes is a great brand my grandpa had one for years until he wanted to get a new one…didn’t need to get a new one just wanted to. You may also want to try and bend the shaft back but i don’t know how safe i would feel using it after that if you were able to.

-- If you can't fix it with a hammer, You've got an electrical problem.

View ajosephg's profile

ajosephg

1850 posts in 2198 days


#10 posted 09-28-2011 03:35 PM

I’ll bet a dime to a donut that the engine is ok. If the crank was damaged it most likely wouldn’t run at all.

For sure, it’s much too soon to take the motor apart.

BTW – JD doesn’t make mowers – they just have a mower mfg. put green paint on them.

-- Joe

View David Grimes's profile

David Grimes

2072 posts in 1277 days


#11 posted 09-28-2011 03:37 PM

And what (pray tell) put that fine fiance into a situation where she’s having to mess with a push mower (JD or otherwise) in the first place? ;=)

A homeowner will never get the right amount of goody out of a true commercial push rig (just because it will be dry rotted and ancient before it reaches the 2100 hour rebuild mark).

Go the other way on push mowers… get the cheapest you can find that have the minimum features (and decent engine… Briggs, Honda) you want/need. Husqvarna, Craftsman or whatever… with a dirt cheap warranty… It will act like the best of them. 4 level wheels and spinning a blade. Like putting a hock iron on a HF plane, it might surprise you.

Save the Wisconsin Robin engine for the ZTR.

-- If you're going to stir the pot, think BIG spoon or SMALL boat paddle. David Grimes, Georgia

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David Grimes

2072 posts in 1277 days


#12 posted 09-28-2011 03:40 PM

Joe is right. If the crank was bent internally it would have shattered housing, outboard bearing, whatever.

Flip, secure, long cheater bar time. Don’t over-do it, Al ! ;=)

-- If you're going to stir the pot, think BIG spoon or SMALL boat paddle. David Grimes, Georgia

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superstretch

1501 posts in 1330 days


#13 posted 09-28-2011 03:58 PM

LOL You call DIY-ing a rebuild is “rednecking it”...

But you’re the one that has the fiancee out mowing :P

-- Dan, Rochester, NY

View WayneC's profile

WayneC

12268 posts in 2735 days


#14 posted 09-28-2011 04:15 PM

Hmmm, I cannot help but wonder if there is some leverage in this story.

-- We must guard our enthusiasm as we would our life - James Krenov

View Don W's profile

Don W

14918 posts in 1205 days


#15 posted 09-28-2011 04:17 PM

Crank shaft shear pin would be my guess, or were you trying to fix the fiance?

-- Master hand plane hoarder. - http://timetestedtools.com

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