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Snowblower Only One Auger Turns

The part(s) or condition(s) listed below for the symptom Snowblower only one auger turns are ordered from most likely to least likely to occur. Check or test each item, starting with the items at the top of the page.

Most Frequent Causes for Snowblower only one auger turns

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Cause 1Shear Bolt and Nut

The shear bolt is a metal bolt that slides through the auger axle sleeve, locking the sleeve in place with the auger drive axle. Shear bolts are designed to break in half if the auger hits a rock or chunk of ice to prevent damage to the engine. If the shear bolt breaks, the auger won’t be able to turn. Inspect the shear bolt to determine if it is broken. If the shear bolt is broken, replace it.

Parts
Cause 2Shear Pin

The shear pin is a metal pin that slides through the auger axle sleeve, locking the sleeve in place with the auger drive axle. Shear pins are designed to break in half if the auger hits a rock or chunk of ice to prevent damage to the engine. If the shear pin breaks, the auger won’t be able to turn. Inspect the shear pin to determine if it is broken. If the shear pin is broken, replace it.

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Cause 3Shear Bolt

The shear bolt is a metal bolt that slides through the auger axle sleeve, locking the sleeve in place with the auger drive axle. Shear bolts are designed to break in half if the auger hits a rock or chunk of ice to prevent damage to the engine. If the shear bolt breaks, the auger won’t be able to turn. Inspect the shear bolt to determine if it is broken. If the shear bolt is broken, replace it.

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Cause 4Auger Assembly

First, check the shear pins for damage. If the shear pins are broken or worn out, replace them. Next, check the auger blades. If the auger blades are bent or damaged, replace them. If the entire auger assembly is worn out, replace the auger assembly.

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Cause 5Bearing

One or more of the bearings for the auger might have failed and seized. If a bearing has seized, replace the bearing and check the belt for damage.

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Cause 6Gearbox

The gearbox might have failed. The gearbox is located between the two halves of the auger. The gearbox has three shafts: one shaft connects to the drive system, and the other two shafts power the two halves of the auger. If the drive system is powering the main shaft and the shear pins are intact, but the two auger shafts aren’t rotating, replace the gearbox.

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