Slippery Crankshaft Pulley - Snowblower Forum : Snow Blower Forums
 
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post #1 of 6 Old 03-03-2019, 11:57 AM Thread Starter
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Slippery Crankshaft Pulley

I've been using my re-powered TB 2410 for a few years with its new engine and pulley setup. This year, I have noticed that either the belt or the pulley has been slipping, because once under a decent load, the auger and impeller would slow down, while the engine RPM remained steady. Once the load was relieved, the impeller and auger speed would increase back to normal.


So, this machine has been on the bench while my Toro PS 824 has taken center stage for snow removal.



I did the usual checking of belt condition and tension, then thought that the pulley itself may be slipping. I was originally thinking that the belt had become stretched or worn, but upon inspection, it looked really good. Then I thought to check the pulley.



The pulley that I have, since re-powering, is a bit oversized because of the 2X increase of power, and is coated with what looks to be epoxy paint of some sort (gray in picture). My thoughts were that the smooth epoxy surface was allowing a bit of slippage when under load, and the more it slipped, the worse the situation got.



My solution, which seems to have worked, was to sand the epoxy paint off of the 'V' grove surface of the pulley to expose bare metal. The machine now works properly, throwing snow a country mile.



Got it fixed just in time for the snowy weekend forecast for southern New England states this weekend (March 3, 2019).


I felt a bit concerned having only 1 good machine so far this winter, but now I am back to 2 good machines.

Regards, Ted
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Current & Past Fleet:
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2014 Troy-Bilt 2410 w/ Briggs & Stratton 305cc Engine
2003 Ariens ST824LE (SOLD)
1999 Toro PowerShift 824 w/ 318cc OHV Tecumseh Engine
1988 Toro 521 w/ 212cc Predator Engine
1985 Toro 3521 w/ 179cc Powermore Engine (SOLD)
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post #2 of 6 Old 03-03-2019, 12:37 PM
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automotive accessory pullies can become 'polished' and slip a little over time, the general solution is to 'deglaze' them by sanding......you should be fine.
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post #3 of 6 Old 03-03-2019, 01:14 PM
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Cool! Hopefully the belt is still OK. I've seen people mention that belts can get glazed from slipping, and will then lose grip. If the slipping returns, maybe consider a belt replacement.

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post #4 of 6 Old 03-05-2019, 03:17 PM Thread Starter
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With the 12"+ snowfall in the eastern MA/ Boston area yesterday, the TB2410 got a decent workout and has now re-gained the snow throwing champion of the household (and perhaps the neighborhood).


It was out throwing my Toro PS by about 10 feet going through 12" of heavy stuff. Makes me want to think about changing the pulley ratio on the Toro to gain a little impeller speed.

Regards, Ted
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Current & Past Fleet:
2017 Husqvarna ST224 (SOLD)
2014 Troy-Bilt 2410 w/ Briggs & Stratton 305cc Engine
2003 Ariens ST824LE (SOLD)
1999 Toro PowerShift 824 w/ 318cc OHV Tecumseh Engine
1988 Toro 521 w/ 212cc Predator Engine
1985 Toro 3521 w/ 179cc Powermore Engine (SOLD)
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post #5 of 6 Old 03-05-2019, 05:15 PM
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@tpenfield, how large is that auger pulley?


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post #6 of 6 Old 03-06-2019, 12:29 PM Thread Starter
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Quote:
Originally Posted by db130 View Post
@tpenfield, how large is that auger pulley?

IDK . . . maybe 3.15 " IIRC.


I think the OEM pulley was 2.75"

Regards, Ted
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Current & Past Fleet:
2017 Husqvarna ST224 (SOLD)
2014 Troy-Bilt 2410 w/ Briggs & Stratton 305cc Engine
2003 Ariens ST824LE (SOLD)
1999 Toro PowerShift 824 w/ 318cc OHV Tecumseh Engine
1988 Toro 521 w/ 212cc Predator Engine
1985 Toro 3521 w/ 179cc Powermore Engine (SOLD)
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