X758 SnowBlower Impeller Shear Pin Replacement
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Thread: X758 SnowBlower Impeller Shear Pin Replacement

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    X758 SnowBlower Impeller Shear Pin Replacement

    Hi,

    The two augers in the front of my 48” snowblower for my x758 are turning fine, however the impeller behind the augers is not spinning so I’m assuming the shear pin broke on the impeller.

    I have extra pins, only issue is I have no idea how to replace the shear pin on the impeller, and nothing in the instruction manual about replacing this one (there is for the auger pins...easy even without instructions). No YouTube video either.

    Does anyone have any help on this?
    Thanks in advance
    x758,
    Front Mounted Dethatcher
    Rear Aerator
    Cart
    Lawn Stripe Kit
    25G Click-n-Go Sprayer
    Rear 3-point-Hitch and PTO
    Snowblower

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    jgayman's Avatar
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    The impeller uses the same shear bolt as the auger. There is a bolt that goes through the drive plate on the front of the impeller.

    The diagram below should help, the shear bolt and nut are highlighted.

    Attached Thumbnails Attached Thumbnails 54_shear.jpg  
    wildbranch2007 likes this.
    2012 2720 -- 200CX Loader -- 54" Quick Attach Snow Blower -- Frontier LR5060 Rake -- Land Pride RB1660 Blade (Hydraulic Angle) -- Artillian 42" Forks -- Ken's Bolt on Grab Hooks -- Fit Rite Hydraulic top-link -- 2013 X500 for mowing duties

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    I tried to upload a video from my phone but I can’t.

    The shear bolt seems intact to the metal plates. The metal plates and auger both spin but the impeller doesn’t move when the machine is running.

    However. When it’s turned off the impeller will spin freely by hand.

    So is it still a shear pin if the pin is intact?

    By the way, not impressed with the build quality on this, the impeller I think is plastic, and I can fit my finger between the impeller and the metal walls, that’s got to be a half inch space
    Attached Thumbnails Attached Thumbnails 13A6F41A-4582-4DB2-8FF7-21FB0BD017C8_1552067532013.jpeg   FBE1979E-39D9-4FDF-AD26-4BBC739E74FB_1552069165080.jpeg   179960B9-17E3-4785-A120-3641E24D7376_1552069184974.jpeg   2F079E0B-6733-40E9-B82F-417548826390_1552069195317.jpeg  
    x758,
    Front Mounted Dethatcher
    Rear Aerator
    Cart
    Lawn Stripe Kit
    25G Click-n-Go Sprayer
    Rear 3-point-Hitch and PTO
    Snowblower

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    jgayman's Avatar
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    Quote Originally Posted by Eire1916 View Post
    The shear bolt seems intact to the metal plates. The metal plates and auger both spin but the impeller doesn’t move when the machine is running.

    However. When it’s turned off the impeller will spin freely by hand.
    My initial though was maybe the key was sheared on the drive flange but if the two plates that have the shear bolt through them turn then the key should be intact.

    So is it still a shear pin if the pin is intact?
    The shear bolt/nut appears to be still there and if both plates are turning it can't be that.

    The only other thing that comes to mind is the plastic HEX front of the impeller. It is the ONLY thing coupling the impeller itself to the metal drive plates. I have it designated with an arrow below. This is very unusual and I would have though drag alone from the metal bushings would allow the impeller to spin without a load on it. But if it is staying stationary while the auger and drive plates are turning there isn't much else it can be.

    The only way to verify is to first remove the shear bolt/nut (#4 & #2), then loosen the set screw (#5) on the forward drive plate (#3) and slide it towards the front of the blower (don't lose the key #6). Then you should be able to verify the engagement of the rear plate (#12) over the plastic hex on the front of the impeller.

    If none of this makes sense let me know and I will try to annotate a diagram.
    Attached Thumbnails Attached Thumbnails impeller_hex.jpg  
    Last edited by jgayman; 03-08-2019 at 01:35 PM.
    2012 2720 -- 200CX Loader -- 54" Quick Attach Snow Blower -- Frontier LR5060 Rake -- Land Pride RB1660 Blade (Hydraulic Angle) -- Artillian 42" Forks -- Ken's Bolt on Grab Hooks -- Fit Rite Hydraulic top-link -- 2013 X500 for mowing duties

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    Adamq's Avatar
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    The set screw is loose and the coupling with the metal places has moved forward. In the bottom right picture of the fan, you can see the plate is forward of the hex on it. In the top right picture you can see the set screw has backed out. I would loosen up the set screw some more, slide it forward to make sure the key is still there, then put it back together and tighten everything up with some blue loctite to keep it from loosing up again, but still be able to take it apart if need be.
    Last edited by Adamq; 03-08-2019 at 01:40 PM.
    jgayman and farmgirl19 like this.
    2019 2025R, H120 Loader, 260b Backhoe, 47 QH Snow BLower, EL23 Kuhn Tiller, I-match, Heavy Hitch and misc. attachments

    2016 X758, 54" HC mower, Quick Hitch, 60" blade, 3 pt hitch

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    jgayman's Avatar
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    Quote Originally Posted by Adamq View Post
    The set screw is loose and the coupling with the metal places has moved forward. In the bottom right picture of the fan, you can see the plate is forward of the hex on it. In the top right picture you can see the set screw has backed out. I would loosen up the set screw some more, slide it forward to make sure the key is still there, then put it back together and tighten everything up with some blue loctite to keep it from loosing up again, but still be able to take it apart if need be.
    Wow... you have a better eye than I do! Let's hope the fix is that simple! :-)
    Adamq likes this.
    2012 2720 -- 200CX Loader -- 54" Quick Attach Snow Blower -- Frontier LR5060 Rake -- Land Pride RB1660 Blade (Hydraulic Angle) -- Artillian 42" Forks -- Ken's Bolt on Grab Hooks -- Fit Rite Hydraulic top-link -- 2013 X500 for mowing duties

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    I got the shear pin off, and sure enough the impeller slipped off the rotating plates holding the shear pin.

    This is my first time using this, bought it from a guy that used it literally one time. So maybe he broke one and didn’t set it up right.

    I had to pull the impeller off the back wall forward and lock in. Now I can retighten the shear pin to the plate. Only issue is will this slip back off it again?

    Also, if you look in this pic, while the key is inside there does it have to be all the way forward in the key slot? I can’t seem to access it to pull it forward in the slot
    Attached Thumbnails Attached Thumbnails 018415B0-982A-4D39-9226-F6F02CA476B9_1552072615238.jpeg  
    x758,
    Front Mounted Dethatcher
    Rear Aerator
    Cart
    Lawn Stripe Kit
    25G Click-n-Go Sprayer
    Rear 3-point-Hitch and PTO
    Snowblower

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    jgayman's Avatar
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    Quote Originally Posted by Eire1916 View Post
    I got the shear pin off, and sure enough the impeller slipped off the rotating plates holding the shear pin.

    This is my first time using this, bought it from a guy that used it literally one time. So maybe he broke one and didn’t set it up right.

    I had to pull the impeller off the back wall forward and lock in. Now I can retighten the shear pin to the plate. Only issue is will this slip back off it again?

    Also, if you look in this pic, while the key is inside there does it have to be all the way forward in the key slot? I can’t seem to access it to pull it forward in the slot
    I could be wrong as it's been a while since I had mine apart but I think you want to push the impeller all the way back against the bearing that is behind it and then move the hex plate and shear plate BACK to fully engage the front hex portion. That will prevent it from slipping off as the problem isn't that the impeller moved BACK, the problem is that the drive plate moved FORWARD.

    Ensure that everything spins freely prior to installing the shear bolt.

    As for the key... try to get the key in the middle of the drive plate. You don't want any sticking out the front or back. So just try to get it centered the best you can.

    If you have any BLUE Locktite I would put some on that set screw prior to tightening. That will help keep it from loosening. I wouldn't use RED Locktite as that can make it very difficult to get things apart later on.
    2012 2720 -- 200CX Loader -- 54" Quick Attach Snow Blower -- Frontier LR5060 Rake -- Land Pride RB1660 Blade (Hydraulic Angle) -- Artillian 42" Forks -- Ken's Bolt on Grab Hooks -- Fit Rite Hydraulic top-link -- 2013 X500 for mowing duties

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    So I pushed the impeller back as far as I could, it did slide back maybe 1/4 inch but it still has a decent gap between it and back wall, I lined the impeller with the hex lock in. Then screwed the backing plates with the shear pin and tightened the whole assembly down with a hex wrench. Didn’t have blue loctite but that sounds like the issue I’ll pick some up to lock it in place.

    Just worried it could happen again. Seems a bad design. I pulled the whole thing to position the key as far forward as possible without coming out the front
    See pic

    Thanks fellas for all the help really appreciate it!!!!
    Attached Thumbnails Attached Thumbnails A695C0A4-BE75-4546-A660-FB215CE89A7A_1552074332297.jpeg   CA0674AF-B2CB-4BBE-A872-C36A417DAEE8_1552074344342.jpeg  
    Adamq likes this.
    x758,
    Front Mounted Dethatcher
    Rear Aerator
    Cart
    Lawn Stripe Kit
    25G Click-n-Go Sprayer
    Rear 3-point-Hitch and PTO
    Snowblower

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    jgayman's Avatar
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    Quote Originally Posted by Eire1916 View Post
    So I pushed the impeller back as far as I could, it did slide back maybe 1/4 inch but it still has a decent gap between it and back wall, I lined the impeller with the hex lock in. Then screwed the backing plates with the shear pin and tightened the whole assembly down with a hex wrench. Didn’t have blue loctite but that sounds like the issue I’ll pick some up to lock it in place.

    Just worried it could happen again. Seems a bad design. I pulled the whole thing to position the key as far forward as possible without coming out the front
    See pic

    Thanks fellas for all the help really appreciate it!!!!
    I think you'll be in good shape. The way you have the key installed looks good. If you have the impeller pushed back as far as it goes and then moved the drive blocks back to engage it, you should not have a problem.

    I don't recall reading any instances of this happening so I don't think it is a chronic issue.

    I'm glad you were able to fix it by simply repositioning the drive plate and tightening things up - no parts needed! :-)

    By the way, thanks for all the great photos... that really helped us a lot!
    2012 2720 -- 200CX Loader -- 54" Quick Attach Snow Blower -- Frontier LR5060 Rake -- Land Pride RB1660 Blade (Hydraulic Angle) -- Artillian 42" Forks -- Ken's Bolt on Grab Hooks -- Fit Rite Hydraulic top-link -- 2013 X500 for mowing duties

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