Snowblower moves more slowly when cold - Snowblower Forum : Snow Blower Forums
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post #1 of 11 Old 02-14-2020, 07:08 PM Thread Starter
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Snowblower moves more slowly when cold

Hey guys;
I've got a 10yr old Craftsman 28in 2 stage blower.
All is working great, except that, when it's cold out (which, unfortunately it always is when there is snow to blow ), the machine moves more slowly.
In 1st forward speed it barely moves, so I have to move the lever up a couple notches.
After I have done some work - maybe 15-20 mins, the speed increases.


My first thought is that the friction wheel needs to be replaced. I did have a look at it before last (2018) season but it did not appear to be severely worn, so I just re-tensioned the cable and cleaned it and the wheel it contacts up with denatured alcohol. That didn't seem to make any difference.
Now, I'm thinking perhaps that the friction wheel does indeed need to be replaced. I haven't had a good look at it yet this year, but am planning to do so on Sunday when it's a bit warmer out.
Since the machine still does the job, I haven't been real concerned, and therefore have not put the repair on a 'front burner' just yet. But I think it's time for me to fix this thing once and for all, or I am going to find myself with a 2ft snowfall and a snowblower with auger turning but no forward drive!


Your thoughts?
Thanks much
FW <Ultrarunner2020>
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post #2 of 11 Old 02-14-2020, 07:13 PM
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What is your oil viscosity ? If you're using SAE 30 you might want to give 5W30 full Synthetic a try.

Last edited by BlowerMods1; 02-14-2020 at 07:19 PM.
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post #3 of 11 Old 02-14-2020, 07:54 PM
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Quote:
Originally Posted by BlowerMods1 View Post
What is your oil viscosity ? If you're using SAE 30 you might want to give 5W30 full Synthetic a try.
Respectfully, what does the engine oil have to do with ground speed?

Welcome to the forum, ultrarunner2020! The friction drive systems are pretty straightforward. There are only so many things that can be slipping.

It could be a slipping belt, perhaps. Though the rubber friction wheel slipping is more common. Cleaning the rubber wheel with alcohol, and the metal disk with brake cleaner, is usually pretty effective (don't get brake cleaner on the rubber). Is your cable (or whatever) tension set correctly, for engaging the drive?

The fact that it improves after 15 minutes or so makes me suspect perhaps a slipping rubber friction wheel. As you're driving around, the rubber wheel should warm up a bit, due to the friction, which would usually make it a bit stickier. This could apply to the belt as well, but the wheel is the more common culprit.

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post #4 of 11 Old 02-14-2020, 09:00 PM
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I agree, replace the rubber friction disk, maybe the type of rubber hardens when cold.

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post #5 of 11 Old 02-14-2020, 09:22 PM
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Thanks, I didn't think to mention that. The rubber can be clean, but just old, and hardened. At 10 years, it's not really that old, but of course that depends on the type of rubber. If the cleaned rubber wheel surface still feels somewhat slick, it may be that it just needs to be replaced.

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post #6 of 11 Old 02-15-2020, 12:43 AM
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Quote:
Originally Posted by ultrarunner2020 View Post
Hey guys;
I've got a 10yr old Craftsman 28in 2 stage blower.
All is working great, except that, when it's cold out (which, unfortunately it always is when there is snow to blow ), the machine moves more slowly.
In 1st forward speed it barely moves, so I have to move the lever up a couple notches.
After I have done some work - maybe 15-20 mins, the speed increases.


My first thought is that the friction wheel needs to be replaced. I did have a look at it before last (2018) season but it did not appear to be severely worn, so I just re-tensioned the cable and cleaned it and the wheel it contacts up with denatured alcohol. That didn't seem to make any difference.
Now, I'm thinking perhaps that the friction wheel does indeed need to be replaced. I haven't had a good look at it yet this year, but am planning to do so on Sunday when it's a bit warmer out.
Since the machine still does the job, I haven't been real concerned, and therefore have not put the repair on a 'front burner' just yet. But I think it's time for me to fix this thing once and for all, or I am going to find myself with a 2ft snowfall and a snowblower with auger turning but no forward drive!


Your thoughts?
Thanks much
FW <Ultrarunner2020>
While it's acting up ...see if you can hold it back by hanging onto the bars and digging in with your feet that will identify slippage if you have any.
If yes..take off belt cover.. try to hold machine back and see if belt is slipping on the crank pully...if not then go below



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post #7 of 11 Old 02-15-2020, 02:44 AM
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The friction disc rubber could be hardened being ten years old, and slip. Another thing to look at is the spring at the end of the drive cable to the friction disc could be weak and not giving enough tension on the disc for enough grip even though the cable free play is adjusted properly, and any belt slipping.
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post #8 of 11 Old 02-15-2020, 10:38 PM
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I have some issues with the Yamaha in that regard. All is well and it works and adjustments look fine.

I just adjust as needed. Sometimes it does not go into 1st or 2nd gear slot and move, flip it to 3 or 4 and then back and ok.

Its something that is very close and to loosen it up and get perfect seems a waste of time and crawling around on the ground to do so , hmmm.

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post #9 of 11 Old 02-15-2020, 10:48 PM
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i would agree with RedOctobyr about maybe checking belts first. if the idler wheel on the belt tensioner is sticking it can stop a machine from moving or if belt is slipping it could cause the machine to move slow.

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post #10 of 11 Old 02-16-2020, 08:17 PM
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Worth check all if its that much of an issue but it should get worse on a belt as it warms up.

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