Craftsman Chain alignment - Snowblower Forum : Snow Blower Forums
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post #1 of 11 Old 09-26-2015, 06:24 PM Thread Starter
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Craftsman Chain alignment

Hi all,
Re: Craftsman 30" Model C950-52730-7

I replaced all four retainer bearings on the hex shaft (2) and the Jack assy (2). For some reason I can not figure out why the outer chain is not in alignment. Any ideas where I went wrong?

Thank you,
Dave
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post #2 of 11 Old 09-26-2015, 07:56 PM
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Dave . . Welcome to the forum

It looks like the shaft with the big gear is installed at an angle. Check the mounting holes you used for the shafts bearings. Is there a different set of holes to mount either of them so that shaft is ninety degrees to the body ??

That chain can be a little bent but it can't handle what I'm seeing in the photo. Something will get chewed up bad the way it is.

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post #3 of 11 Old 09-26-2015, 08:04 PM
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From the parts photo it looks like those bearings have one ear longer than the other. It looks like the long ear should go forward (towards the auger). Any chance one is backwards ??

Are all four support bearing assemblies different part numbers ??

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Last edited by Kiss4aFrog; 09-26-2015 at 08:17 PM.
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post #4 of 11 Old 09-26-2015, 08:13 PM
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Any change the left and right side bearings are different thicknesses?

On your diagram, the left and right sides of both shaft bearings have different part numbers. 4 different numbers in total. I bet each one is a different size. Both look skinnier on the gear side in the drawing. Can't tell on your machine though as you only show one side.

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Last edited by Shryp; 09-26-2015 at 08:16 PM.
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post #5 of 11 Old 09-26-2015, 08:23 PM Thread Starter
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The four bearings are all the same part number #334163 and equal thickness & length on both ends. I double checked the 2 extra new ones and confirmed ear length is the same on both ends.

I installed them as per diagram and matching the holes with worn paint. The shafts are not bent and there is not much clearance on the bottom gear to move due to a shield.

Last edited by Buster001; 09-26-2015 at 08:34 PM.
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post #6 of 11 Old 09-26-2015, 09:05 PM
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I checked a different craftsman blower and it lists two different diagram numbers but like yours all four are the same part number and the exact same part number as yours.

From the pictures you posted it sure looks like the lower shaft is crooked and the left side mount needs to come down closer to the drive axle.
Like if the far mounting bolt was removed and the bearing flipped 180 degrees and bolted back in would straighten out the shaft and restore gear and chain alignment.
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post #7 of 11 Old 09-26-2015, 09:16 PM Thread Starter
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I am going to try your suggestion and drop the arrowed bearing 180 degrees. Reply back soon.
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post #8 of 11 Old 09-26-2015, 09:58 PM Thread Starter
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Well my friends,

Moving the one outer bearing to a vertical position certainly did the trick, check out the pics.

I used a wrench to mark the before and after positions of the bearing.

It is amazing, the previous owner failed to let me know of his bearing issues

Thank you to everyone who offered advice.

Dave
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post #9 of 11 Old 09-26-2015, 10:10 PM Thread Starter
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Finally,
My lesson learned tonight is sometimes experience and judgement can be more reliable than a manufacturers drawing.
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post #10 of 11 Old 09-27-2015, 06:00 AM
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The lesson is don't trust anyone including us. Take any advise and use it with your own common sense and things will work out.

I've learned the hard way that a seller no matter how "nice" or concerned they may appear usually will never tell you all about what you're buying. They might be truly evil and are out to screw you or they might just not know what's really wrong and just can't deal with it themselves. Then there is always the guy who thinks it's as good as the day he bought it even thought he's never wiped it down once, changed oil or adjusted anything in it's 10 hard years with him.

It really is buyer beware. Like yours, the hardest ones are where someone took it apart and didn't put it back together right.

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