'94 MTD 314-610E000 Auger/impeller belt slipping - Snowblower Forum : Snow Blower Forums
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post #1 of 24 Old 01-28-2016, 10:20 PM Thread Starter
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'94 MTD 314-610E000 Auger/impeller belt slipping

Hi guys. I have an MTD model 314-610E000 (1994 5 hp 24"). This model has a single pulley and belt that drives both the impeller and augers. It was working fine in our last big snow until the end of the day. Turns out, the belt was slipping on the drive pulley. I disassembled the worm gear assembly for the auger and the brass worm gear is intact and in good shape. Replaced the shear pins. Replaced the auger/impeller belt (22 years old) thinking it would solve the problem, but it didn't. Has anyone else experienced this? Any ideas? Do you think it could be the auger cable assembly? Could the spring at the end which pulls on the idler pulley be getting "soft" and preventing the belt from tightening enough for a full load on the augers? The OEM belt has teeth (like the original). Does MTD make a cogged drive pulley that will fit this model? Thanks for your ideas on this one.
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post #2 of 24 Old 01-29-2016, 07:57 AM
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Did you buy belts for snowblowers/small power equipment. Automotive belts are designed differently. And don't work in OPE applications. Also, check the control cables. The may be stretched or need adjustment. The idlers may not be applying enough force, to prevent belts from slipping.




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post #3 of 24 Old 01-29-2016, 08:08 AM
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Rex
If your idler pulley is sufficiently tightening your belt, it should not be slipping. Make sure your pulley sheave is not "varnished" from your slipping belt. Give it a good scrubbing with a wire brush to get it down to bare steel. If it still slips you might have a bearing heating up or some other mechanical issue. MH

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post #4 of 24 Old 01-29-2016, 09:14 AM Thread Starter
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Motor City - Yes, I replaced the belt with an OEM MTD belt - same size, with teeth (don't know why, since there are no cogs on the pulleys) and tightened up the cables.

motorhead64 - I'll re-check for the varnished sheave. I didn't see anything suspicious when I replaced the belt. I did take a wire brush to the large pulley. The bearing for the impeller/auger drive shaft spins freely. The only other moving part is the idler pulley and that seemed fine too.

Based on your feedback and my suspicions, I think what I'll do is replace the auger cable-spring assembly (an easy job and only $15) and take a wire brush to the drive pulley. While I'm in there, I'll re-check the mechanics to make sure nothing is hanging up. If that all doesn't do it, I'll be looking for a cogged drive pulley.

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post #5 of 24 Old 01-29-2016, 09:26 AM
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I don't think the drive belt is toothed like a Timing Belt; but only to allow it to accommodate a tighter radius around these small (and conjested) pulleys . . . . and to provide some minimal cooling.

I think a cogged pulley would result in faster wear than what you've experienced over the past 20+ years.
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post #6 of 24 Old 01-29-2016, 09:32 AM
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Both of those belts look to be riding a bit low in the sheaves?

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post #7 of 24 Old 01-29-2016, 09:37 AM
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Idler Pulley

By looking at your picture. you could try sliding over your idler in the pulley arm. That should give you a little more tension on the belt when you engage the auger lever
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post #8 of 24 Old 01-29-2016, 10:12 AM
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I've had to replace the auger cable on quite a few of the MTD's I've had. The seem to stretch easily.




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post #9 of 24 Old 01-29-2016, 11:02 AM Thread Starter
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nwcove - there is plenty of slack on the drive wheels to where the unit doesn't creep. The auger belt is loose as you can see on the left and right-hand side of the pulley. Don't know how to make it ride high on the pulley. The auger belt is new, so it is a little stiff. Maybe that's why its sitting low. ?

ProParts - Good catch. I'll slide it over and see what happens.
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post #10 of 24 Old 01-29-2016, 11:04 AM Thread Starter
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Has anyone had luck using belt dressing on snow blowers?
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