The genuine Western 21727-2K Breather Kit is an essential maintenance component for your plow’s hydraulic unit. This kit features a 3/8-inch NPT breather designed to regulate the air pressure inside your hydraulic reservoir. As hydraulic fluid levels fluctuate during cylinder extension and retraction—or due to temperature changes—this breather allows air to enter or escape freely. Consequently, it prevents the formation of dangerous vacuum conditions or excessive positive pressure that can lead to premature seal failure or sluggish pump performance.
This kit is compatible with a wide range of Western snow plow models, including UltraMount, UniMount, and conventional mounting systems across HTS, MVP, MVP 3, Pro-Plow, and Wide-Out series. Because it is a genuine factory component, it offers an exact fit for your pump’s reservoir port. Furthermore, the breather acts as a crucial filter, preventing airborne dust, moisture, and debris from contaminating your hydraulic fluid, which is vital for maintaining the longevity of your valves and pump.
For reliable winter performance, replace your breather if it becomes clogged or damaged to ensure your hydraulic system breathes correctly. Installation is straightforward, providing an easy way to safeguard your plow’s core hydraulic power unit from internal wear and tear.
Benefits of the Western 21727-2K Breather Kit
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Genuine OEM Design: Factory-spec breather kit ensures correct air regulation for Western, Fisher, SnowEx, and Blizzard hydraulic pumps.
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Prevents Seal Damage: Eliminates vacuum or pressure buildup in the reservoir, significantly extending the life of hydraulic seals.
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Contaminant Filtering: Effectively blocks dust, moisture, and debris from entering the hydraulic fluid.
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Universal Compatibility: Fits a vast array of legacy and current Western plow models, including MVP, Pro-Plow, and UltraMount systems.
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Simple Installation: Standard 3/8″ NPT threading allows for quick replacement during routine service intervals.
Additional Info and Common Related Parts
| Part Number | Item Name | Technical Role |
| 41904 | Mount Bolt Bag | The complete factory-spec hardware kit containing the high-tensile fasteners for this mount. |
| 22314 | Handle Bolt | Specialized structural bolt used to secure the mount plates inside the truck’s enclosed frame rails. |
| 29070-1 | 3-Port Isolation Module | Required to safely govern the electrical switching between the truck and plow lighting systems. |
| 69889-1 | 11-Pin Lighting Harness | The primary vehicle-side wiring harness necessary to link the truck to the isolation module. |
Always refer to your Western Plow’s documentation and vehicle-specific service manuals to confirm compatibility and proper installation procedures.
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