Yard Man forward drive slipping - Snowblower Forum : Snow Blower Forums
 
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post #1 of 5 Old 07-24-2016, 09:53 PM Thread Starter
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Yard Man forward drive slipping

Hello, what a great resource! I have a Yard Man model 31850-8, from 1977 I believe. It is a 26" 8hp unit that has been very solid.

When I plow, sometimes the forward drive feels like it is slipping. This happens in all forward gears. Last year I replaced the friction wheel assembly because the rubber part was dried, hard, and had a crack. Tension on the wheel from engaging the drive handle appears to be solid. Does the aluminum drive plate also need to be replaced, or at least cleaned for better contact? I'll also take a look at the drive belt and tensioner.

Also, there are a couple chains in the transmission that appear to have quite a bit of slack. If slack is bad, are there any shaft adjustments that can be made to remove the slack? I doubt this is related to the slipping, but just curious.
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post #2 of 5 Old 07-25-2016, 06:27 AM
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Are you using a small plow on the blower, or you just meant when you use the snowblower?
I've never had to deal with it, but yes I have read that you have to clean the friction plate with brake cleaner (or something similar).
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post #3 of 5 Old 07-25-2016, 12:04 PM
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You can try some brake cleaner, carb cleaner or regular gas on a rag to wipe off the metal disc as well as the contact area of the rubber. Also make sure the bearings for both axles in the friction disc system are tight. If there is a spring in the engagement system somewhere maybe it is getting worn out. Could also be the handle just needs tightened more.

Normally the drive belt doesn't slip unless the spring on the tensioner completely breaks.

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post #4 of 5 Old 07-25-2016, 09:05 PM
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Quote:
Originally Posted by thool View Post

Also, there are a couple chains in the transmission that appear to have quite a bit of slack. If slack is bad, are there any shaft adjustments that can be made to remove the slack? I doubt this is related to the slipping, but just curious.
you might want to check the end bushings that support the axles to see if they have perhaps gone oval, allowing the shafts to reduce pressure of the friction wheel on the aluminum drive disk, and possibly allowing more slack in the drive chains.

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post #5 of 5 Old 07-26-2016, 12:07 PM Thread Starter
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Thanks all for the tips. I'm an early bird and like to get started with plenty of advance time, so I'll likely start working on the snowblower some time in September.
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