Lawn Mower Tractors Transmission Cooling Fan 10 Blade Black 1A646083070 fits Tuff Torq Cub Cadet Troy-Bilt Craftsman Bolens Remington Ryobi Yardman Yard-Machine

What It Is

This is a 10-blade transmission cooling fan (part number 1A646083070) designed to replace a damaged or worn fan on Tuff Torq transmissions found in many lawn tractor models. It keeps the hydrostatic transmission from overheating during extended mowing or heavy-duty use.

Fitment & Compatibility

Before buying, verify your tractor uses a Tuff Torq transmission (common in Cub Cadet, Troy-Bilt, Craftsman, Bolens, Remington, Ryobi, Yardman, and Yard-Machine models). This fan fits Tuff Torq K46, K47, K57, and K62 transmissions. Measure the center hole diameter—it should be 1/2 inch. The fan itself is roughly 5 inches across with 10 blades. This is an OEM-style replacement (not aftermarket), so it matches factory specs. Check your old fan’s blade count: if it has 10 blades, this is a direct swap. If your fan has 6 or 8 blades, this won’t fit without modification. Always confirm your tractor’s model number and transmission type via the deck or frame sticker.

Key Things to Know

• Quality: Made from durable black plastic; holds up well under normal mowing conditions but can crack if hit by debris.
• Installation Difficulty: Easy to moderate. You need to remove the mower deck and possibly the transmission pulley to access the fan. A puller tool may be required if the old fan is seized.
• Common Gotchas: The fan is directional—make sure the blades point toward the transmission (air should blow onto the cooling fins). Reversing it will cause overheating. Also, check the fan’s keyway: some models use a woodruff key; ensure yours is present and not damaged.
• No hardware included: You’ll need to reuse your existing bolt, washer, and key. If they’re worn, buy replacements separately.

Should You Buy It

If your Tuff Torq transmission fan is cracked, melted, or missing blades, this is a solid, affordable replacement that restores proper cooling and prevents transmission failure. It’s ideal for DIYers with basic mechanical skills who want to avoid a costly shop repair. Skip it if your transmission is a different brand or if the fan shaft is badly damaged—then you may need a full transmission service.