Any tips on getting the big nut off the front of the crank?

sflem849 · Jan 6, 2012

I can't seem to get the nut loose on the front of the crank. I bent the retainer back and put a big pipe wrench on it. I don't have any sockets that big, but it would probably help. (if anybody seems to remember how big a WD-9's nut is let me know. I think I measured 2 1/4") I tried to wedge a bar on the flywheel studs on the other end to keep is from spinning, but no luck. Thanks!

Brad Motheral · Jan 6, 2012

buy, beg, borrow or steal a 3/4" impact and appropriate socket.

redgems · Jan 6, 2012

I am sorry to tell you Brad is right on.
I fought a f=400 nut and a 560 nut ,not until I got the socket and impact, could I get it off.
As for size, sorry don't remember off hand and to late at night and cold to go to shop .
My e-mail is open if you need size tomorrow. Tony

mike paulson · Jan 7, 2012

yea 3/4 in drive impact with no extensions or reducers. just a 3/4 inch drive socket and a powerfull 3/4 gun..might be able to rent one.

D Slater · Jan 7, 2012

Think 2-1/2 is correct, will check when I go to shed and edit post if wrong. If the oil pan is coming off, place a wood block inside to block crank from turning. On a hard one with pan still on and engine out, a metal strap bolted to flywheel and a chain from it to block or plate. One inch drive socket and a long cheater pipe will do the trick sometimes when my impact won't budge it. On some it looks like a big chisel and hammer are the tools of choise. I work alone so thats what I do on difficult ones. Less difficult ones a impact will work good. Or a high power impact works on most.
Looked at socket I use and had to correct from 2-1/4 size to 2-1/2.

sflem I wasn't recomending the hammer and chisel. Just mentioned that looks like a good bit were removed that way in the past.

Dave_Id · Jan 7, 2012

1 inch drive would be even better. I had to remove the rear wheels on a Massey Harris 101 Senior Standard. I borrowed one from my friendly IH dealer.

sflem849 · Jan 7, 2012

I called my neighbor and he has a 3/4" drive impact. I will call around and see if there are any 1" impacts available. My little toy air compressor won't run it, but I can get the 100 cfm at 125 psi engine driven out of the shed. :lol: It kind of stinks because the MD is parked in front of it.

Thanks for the socket advice Slater. I was considering the cold chisel on this one as well. This is my parts motor so it is already out of the tractor. The pan is already off and it is sitting on it's side. I was kind of dumb though because I took all the bearing caps off the measure and now it is all screwed up because all the pistons are pushed up to the top. I will probably want to put two end bearings on the crank so the wood has more to push against.

souNdguy · Jan 7, 2012

a good 3/4 impact should spin it loose.

Eric-IA · Jan 7, 2012

I had to heat the one on the front of my F-20.
Used a hammer and chisel as someone else had done
before- already had chewed the shoulders on the
nut up pretty good.
I did look into buying a socket but I had a hard
time shelling out $50+ bucks for a socket I would
likely use once.
Since, I saw larger sockets at the local CarQuest
store that are made for truck lug nuts. Extra
large and cheaper.
Food for thought.

sflem849 · Jan 7, 2012

Where do you get the nut to replace the one you trashed? I would guess I could get one good one out of three, but a lot of guys don't have that luxury.

Any tips on getting the big nut off the front of the crank?

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sflem849

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Brad Motheral

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redgems

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mike paulson

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D Slater

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Dave_Id

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sflem849

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souNdguy

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Eric-IA

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sflem849

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