January 20, 2015

How to replace a snowblower shear pin

By Lyle Weischwill
How to replace a snowblower shear pin

This step-by-step repair guide shows how to replace a snowblower shear pin. If hard-packed snow or a foreign object jams the auger, the snowblower shear pin breaks to protect the engine from damage. Once the shear pin breaks, the auger is no longer attached to the snowblower drive shaft and won’t rotate. Replace the broken shear pin with a manufacturer-approved replacement part.

You can use the steps in this guide to replace broken shear pins on Craftsman, Husqvarna, Troybilt, Murry, MTD, Toro, Poulan, Ariens and Cub Cadet snowblowers.

Quick links
Tools required
1/2-inch wrench
Hammer
Nail
Repair difficulty
Time required
15 minutes or less
Repair difficulty
Time required
15 minutes or less

Instructions

01.

Disconnect the spark plug wire.

Pull the wire straight up and off of the plug. 

02.

Remove the broken shear pin

Remove the broken shear pin, using a hammer and nail to completely clear the hole of any pieces.

03.

Insert the new shear pin

Realign the holes in the auger and the shaft. Insert the new shear pin and secure it with the bow tie pin.

Insert the new shear pin.

Insert the new shear pin.

Secure the shear pin with the bow tie pin.

Secure the shear pin with the bow tie pin.

04.

Test the auger

Reconnect the spark plug wire. Start the engine and test the operation of the auger.

Warning: Undertaking repairs to appliances can be hazardous. Use the proper tools and safety equipment noted in the guide and follow all instructions. Do not proceed until you are confident that you understand all of the steps and are capable of completing the repair. Some repairs should only be performed by a qualified technician.
Symptoms for gas snowblowers

Choose a symptom to see related snowblower repairs.

Main causes: stale gas, clogged carburetor, clogged or broken fuel line, dirty spark plug, bad rewind starter, incorrect valve lash
Main causes: broken shear pins, worn or loose auger drive belt, auger drive cable failure, damaged auger, bad gear case
Main causes: loose drive clutch cable, damaged drive clutch cable, worn friction disc, scraper blade scraping the ground, engine problems
Main causes: punctured tire, damaged rim
Main causes: snow build-up in chute, chute drive mechanism failure, bad chute control assembly
Main causes: clogged chute, damaged auger blades, broken shear pins, worn auger belt, damaged gear case, engine problems
Main causes: dirty carburetor, stale fuel
Main causes: clogged chute, snow build-up in auger housing, broken auger shear pins, auger drive belt needs adjustment, auger cable problems
Things to do: replace the spark plug, change the oil, rebuild the carburetor, adjust valve lash, adjust or replace the belts
Repair guides for gas snowblowers

These step-by-step repair guides will help you safely fix what’s broken on your snowblower.

December 1, 2015
By Lyle Weischwill
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Repair difficulty
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Articles and videos for gas snowblowers

Use the advice and tips in these articles and videos to get the most out of your snowblower.

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How to lubricate a snowblower auger shaft video
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