Western 49330 Hydraulic Fluid optimizes the operating efficiency of your snow plow hydraulic system. Additionally, Western formulates this aircraft grade, high-performance oil to withstand extreme winter weather. This premium formula prevents oxidation and thermal breakdown during heavy plow usage. Consequently, your plow components experience less internal wear and tear. Because of this, professional fleet operators choose only original factory fluids.
Why Use Western 49330 Hydraulic Fluid?
Maintaining clean fluid in your reservoir keeps the hydraulic pump operating at maximum pressure. Therefore, mechanics recommend performing a complete system flush before the winter season begins. This fluid flows reliably in sub-zero temperatures down to -25°F.
As a result, you avoid sluggish cylinder responses and sluggish manifold valve operations. Furthermore, our site ships this genuine Western 49330 Hydraulic Fluid directly to your shop. Also, utilizing this OEM fluid preserves your factory warranty on all new hydraulic replacement parts.
Similarly, you can consult technical service bulletins on westernplows.com for detailed flushing procedures. Customers buy Western 49330 Hydraulic Fluid in convenient one-gallon containers to ensure quick shop refills.
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High-performance oil resists foaming and aeration.
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Special additives protect valves from moisture and corrosion.
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Anti-wear formula extends the lifespan of cylinders and pumps.
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One-gallon bottle simplifies bulk storage for large fleets.
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Replacement reservoir filler caps are sold separately.
Additional Info and Common Related Parts
| Part Number | Item Name | Technical Role |
| 56789-5 | Western Suction Filter | Filters contaminants from the hydraulic fluid reservoir |
| 66405 | Return Screen Assembly | Prevents large particles from entering the pump inlet |
| 21727-2K | Western Breather 3/8 NPT Kit | Vents the reservoir to maintain proper atmospheric pressure |
| 49311 | One Quart WP Hyd Fluid | Provides a smaller fluid volume for quick trail top-offs |
Always refer to your Western Plow’s documentation and vehicle-specific installation instructions to confirm compatibility and proper installation procedures.
Material Safety Data Sheet can be found here




Best price
Proper fluid
Product is fine, but waiting on (2) gal that were ordered and paid for.
Functions as expected! great price!
Yay