MTD Snowblower Auger Idler Bracket 684-05186

Basic information

• Part name: Auger idler bracket
• Manufacturer: MTD
• Category: Snowblower drive and auger control part
• Primary function: Supports the auger idler pulley to maintain proper belt tension

Installation & compatibility

• Compatible models: Fits select MTD and Craftsman snowblower models; confirm compatibility using your models parts diagrams
• Installation difficulty: Medium; requires accessing the auger drive system to remove and install the bracket
• Tools required: Wrench set and socket set

Additional information

This auger idler bracket, part number 684-05186, holds the idler pulley in the correct position so the auger belt maintains proper tension when engaged and releases correctly when disengaged. Proper bracket alignment helps support smooth auger engagement and consistent belt performance.

If the auger does not engage, slips under load, or the belt squeals or wears unevenly, the idler bracket may be bent, cracked, or misaligned. Excessive movement at the pulley mounting point can also affect belt tension.

Before starting the repair, disconnect the spark plug wire to prevent accidental starting. Install the bracket squarely, then tighten all mounting hardware evenly so the idler pulley stays aligned and the belt tracks correctly.