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  #1  
Old 03-25-2014, 10:11 AM
oglelawncare oglelawncare is offline
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Join Date: Mar 2014
Location: Burns, Tn
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Scag 60 inch walkbehind blade removal problems

First off, I am new to lawnsite. I have a 60 inch scag walkbehind (about ten-fifteen years old, I bought if off a guy for 100 bucks and got it running). Model and serial are difficult to read, Model: SWZ 20CVE Serial: 26470387. That is the best that I can read it, some more details, it has a Kohler engine model CV20S. It is electric start and hydrostatic drive.

The problem that I have run into is in getting the blades off. This may be unneeded, but the way the blade retaining system works is there is a rod that goes from the bottom of the deck through the blade and pulley system. The blade side of the rod has a 15/16ths end with a washer before the blade, and it is solid all the way up through the pulley, above the pulley there is about five metal washers with a threaded end where 15/16ths bolt goes, that holds it all together.

Now my problem, because this mower was old and not used very much by its previous owner, the rods were rusted all the way through the deck, I got two of them out using a hammer to bang them through ( doing this i messed up the threads, my plan is to go to fastenall and try to match them.) The third one was rusted solid. I tried for a couple hours to hit it through with the hammer, doing this I bent it some. So I took a grinder and ground the bent portion of the shaft that was sticking up above the pulley ( my rationalization was that it was not going to go through because it was a tight fit and the shaft was bent).

So now I have about a quarter of an inch of shaft sticking up above pulley. It is still rusted so that I cannot get it out to get the last blade off.

What I have tried: half a can of wd 40
hammering it
heating it, but i was a little worried about heating it too much becuase I did not try to take off the pulley assembly so I did not want to melt the belt

my next idea is to get a pulley puller and try to use that to get it off from the underside of the deck


does anybody have any better ideas than me?

thank you for the help
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  #2  
Old 03-25-2014, 01:14 PM
dieselss dieselss is offline
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Location: highland in
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You can try to use an impact ans just "spin" the bolt to break it free. You can use an air hammer. You can cut the head of the bolt off from underneath and try hitting it from underneath. Fyi wd-40. Is not a good penetrent
Those bolts might be proprietary to scag. I havent been able to find any by me. But I'm sure someone else might have had better luck
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Old 03-25-2014, 01:33 PM
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Blade Runners Blade Runners is offline
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Location: Woodlawn, TN
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Sounds like you done more damage than good. Anytime you pound on the threaded end of a bolt to break it free, you should have the nut threaded on to prevent mushrooming the bolt. WD40 is next to worthless for freeing up rusted parts. Get a can of Kroil and spray the bolt down, then use an impact on the blade side of the bolt. It will break loose guaranteed.

Heating will do no good. You need to heat the housing the bolt is in to get it to expand and you are unable to do this. Heating the bolt only will cause it to expand and add to the problem.
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Old 03-25-2014, 01:36 PM
oglelawncare oglelawncare is offline
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Quote:
Originally Posted by dieselss View Post
You can try to use an impact ans just "spin" the bolt to break it free. You can use an air hammer. You can cut the head of the bolt off from underneath and try hitting it from underneath. Fyi wd-40. Is not a good penetrent
Those bolts might be proprietary to scag. I havent been able to find any by me. But I'm sure someone else might have had better luck
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Ok thanks I will try that and use pb blaster. As for the bolts, I was afraid that they may be something that you can only buy from scag, I guess I will check fastenall just in case.
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Old 03-25-2014, 01:46 PM
dieselss dieselss is offline
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I have tried to get them aftermarket, and have never had any luck
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  #6  
Old 03-25-2014, 01:46 PM
benneyben benneyben is offline
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Location: Colchester VT
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Yeah. Pb'laster is the way to go. It probably wouldn't be very hard to drop the whole spindle and get better access to the problem. That way you can see if you can remove bits and pieces to get better access to whats frozen. Check the bearings for wobble too, they don't like being hammered on.
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Old 03-25-2014, 01:48 PM
oglelawncare oglelawncare is offline
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ok thanks I will check that too tonight
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Old 03-25-2014, 07:42 PM
djagusch djagusch is offline
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Join Date: Mar 2006
Location: MN
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Remove pulley, remove spindle, and try to get bolt out.

Most likely buying a new spindle and blade bolt is the way to resolve the issue.

Use antiseize on the bolt shaft in the future.
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Old 03-25-2014, 11:34 PM
ncls ncls is offline
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Location: Cleveland, Ohio
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You're buying a spindle at minimum. Probably a pulley, also, because it will have to be destroyed to remove it off the shaft. You could just replace the bearings off the spindle. but if you need to replace the bearings, and the shaft, then just buy the spindle.
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  #10  
Old 04-01-2014, 09:19 AM
wahlturfcare wahlturfcare is offline
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Location: iowa
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you can buy the spindle bolt in grade 8 at any hardware store.
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