New TRANSMISSION/HYDROSTATIC DRIVE FAN BLADE For John Deere X300 X300R X304 X305R

What It Is

This is a replacement cooling fan blade for the hydrostatic transmission on select John Deere lawn tractors. It mounts on the transaxle input shaft to draw air over the transmission, preventing overheating during mowing or towing.

Fitment & Compatibility

Before buying, verify your tractor model and transmission type. This fan fits John Deere X300, X300R, X304, and X305R models with the Tuff Torq K46 or K58 hydrostatic transaxle. It does not fit X300 models with the K66 (e.g., X350/X370). Measure the fan diameter—OEM spec is 7.5 inches across. Check your existing fan for the number of blades (this one has 6). If your fan is cracked or missing, match the shaft hole size: this fan uses a 5/8-inch bore. Aftermarket part, not OEM John Deere, but should match dimensions exactly. Confirm your model year (2005–2015 X300 series) for best fit.

Key Things to Know

• Quality: Aftermarket replacement; may be slightly less durable than OEM, but adequate for residential use. Inspect for flash or uneven blades before installing.
• Installation difficulty: Moderate. You’ll need to remove the mower deck, then the transmission drive belt and pulley to access the fan. No special tools beyond basic wrenches and a socket set.
• Gotcha: The fan is press-fit onto the shaft. If the old fan is fused on, a fan puller or gentle prying with two flathead screwdrivers works. Don’t hammer—you risk damaging the transmission seal.
• Check for debris: Before installing, clean any grass or dirt buildup around the transaxle cooling fins. A blocked fan does nothing.

Should You Buy It

If your X300-series tractor’s transmission cooling fan is broken or missing, this $17.89 replacement is a budget-friendly fix that prevents overheating and transmission failure. It’s fine for light to moderate residential use, but if you mow heavy grass or tow frequently, consider an OEM fan for better longevity.