C3 - Mower - Cub - 1976 - Belt Keeps Falling Off

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rtfosmoe
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C3 - Mower - Cub - 1976 - Belt Keeps Falling Off

Postby rtfosmoe » Fri Jul 23, 2021 6:23 pm

Hello,
I trying to get my C3 to operate correctly. I just installed it using the C3 manual on this webpage. I believe that I have installed it correctly. However, whenever I start to mow the belt falls off the center pulley. I have attempted to make the belt as taut as possible. Can someone tell me what I'm doing incorrectly? :lost: I have almost destroyed my new main belt.

Thanks

Rich

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Re: C3 - Mower - Cub - 1976 - Belt Keeps Falling Off

Postby rtfosmoe » Fri Jul 23, 2021 6:26 pm

Here are the images
Attachments
IMG_20210723_184037_HDR (2).png
IMG_20210723_184046_HDR (2).png
IMG_20210723_184030_HDR (2).png

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Re: C3 - Mower - Cub - 1976 - Belt Keeps Falling Off

Postby tst » Fri Jul 23, 2021 6:56 pm

belt looks loose in pic, also cannot tell in the pic does it have the belt guide by the middle deck pulley ?

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Re: C3 - Mower - Cub - 1976 - Belt Keeps Falling Off

Postby Bob McCarty » Fri Jul 23, 2021 6:58 pm

Are you referring to the center pulley in the first picture, or the center pulley on the deck?
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Re: C3 - Mower - Cub - 1976 - Belt Keeps Falling Off

Postby tst » Fri Jul 23, 2021 7:16 pm

belt looks loose in pic, also cannot tell in the pic does it have the belt guide by the middle deck pulley ?here is pic of the guide, the flat idler pulley should be bigger than the V belt idler pulley
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IMG_6348.JPG

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Re: C3 - Mower - Cub - 1976 - Belt Keeps Falling Off

Postby Nelson 634 » Mon Jul 26, 2021 1:18 am

Move Idler pulley to opposite side of mounting bracket. Belt seems to want to go that way any how. Maybe someone replaced it incorrectly. (tst, I'm just guessing.) Tell me if I'm wrong. Still learning
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Re: C3 - Mower - Cub - 1976 - Belt Keeps Falling Off

Postby outdoors4evr » Mon Jul 26, 2021 5:36 am

That belt has significant wear. I'm guessing that a couple of the cords in the belt have broken and tries to climb the pulley.
You should probably replace the belt.
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Re: C3 - Mower - Cub - 1976 - Belt Keeps Falling Off

Postby john2189 » Mon Jul 26, 2021 7:01 am

That flat idler is way out of adjustment. Looks like there is enough slot it can be moved to the right. I’d move the idler and maybe the old belt will stay on.
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