Complete Spindle Assembly 50051388 Assemble Replacement Parts Kit & Pull Sheave 50074053 With All Hardware Fit For Bush Hog RDTH, FTH, ATH, EFM, TD-1500, TD-1700 Models Finish Mowers & Rotary Cutters

What It Is

This is a complete spindle assembly kit for Bush Hog finish mowers and rotary cutters, including the pull sheave and all necessary hardware. It’s designed to replace the rotating hub and pulley that drive the blade on decks like the RDTH, FTH, ATH, EFM, TD-1500, and TD-1700 models.

Fitment & Compatibility

Before buying, verify your mower’s model and deck size. This kit fits Bush Hog RDTH, FTH, ATH, EFM, TD-1500, and TD-1700 series—but not all spindle positions may be identical. Measure the existing spindle bolt pattern (center-to-center on mounting holes) and shaft diameter. OEM part numbers include 50051388 and 50074053. This is an aftermarket replacement, so compare the housing height and sheave diameter to your original to ensure belt alignment. If your deck uses a different blade bolt pattern or shaft length, this won’t work.

Key Things to Know

• Build quality: At 4.2 stars, most users report solid construction, but a few note the sheave may be slightly thinner than OEM—check belt tension after install.
• Installation difficulty: Moderate. You’ll need a socket set, torque wrench, and possibly a puller to remove the old spindle. The kit includes all bolts and bearings, but you may need to reuse the blade bolt.
• Common gotcha: The pull sheave’s keyway may need minor filing for a snug fit on the shaft. Test fit before tightening.
• Lubrication: The spindle comes pre-greased, but add a dab of grease to the bearings during installation for longevity.

Should You Buy It

If you own a Bush Hog RDTH, FTH, ATH, EFM, or TD-series mower and need a reliable, cost-effective spindle replacement with all hardware included, this kit is a solid choice. It’s best for DIY mechanics comfortable with basic deck disassembly. Avoid if your deck has non-standard spindle dimensions or you require OEM-exact fitment.