3 Pack 539112170 Spindle Assembly with 532153535 Spindle Pulley Replaces Husqvarna 539112170, 532173436, 539112171 for Husqvarna MZ5225, MZ52, MZ 52, RZ4824F, TS 354D Mowers

What It Is

This is a 3-pack of spindle assemblies (with pulleys) that drive the mower blades on Husqvarna zero-turn and lawn tractors. Designed for commercial or heavy residential use, it replaces worn or damaged spindles to restore cutting performance and eliminate vibration.

Fitment & Compatibility

Before buying, verify your mower’s deck size and model. This kit fits Husqvarna MZ5225, MZ52, MZ 52, RZ4824F, and TS 354D—but only those with 48-inch or 52-inch fabricated decks. Check your OEM part number: it replaces 539112170, 532173436, and 539112171. The pulley (532153535) is included and pre-mounted. If your deck uses a different spindle bolt pattern or bearing size (e.g., stamped decks), this kit will not fit. Measure center-to-center bolt spacing (typically 3.25 inches on these models) and confirm your blade bolt thread (usually 5/8-inch-11).

Key Things to Know

• Quality: OEM-grade replacement with sealed bearings and cast iron housing—holds up better than cheap aftermarket spindles.
• Installation: Moderate difficulty. Requires removing the deck, loosening belt tension, and unbolting the old spindle. Use a torque wrench for blade bolts (40-50 ft-lbs).
• Gotcha: The pulley is pre-installed, but the blade bolt and washer are not included—reuse or replace separately.
• Gotcha: If your deck has a grease fitting on the spindle, this unit is sealed and does not require lubrication. Do not attempt to grease it.

Should You Buy It

Buy this if you own a compatible Husqvarna zero-turn or tractor with a fabricated deck and need a reliable, direct-fit spindle replacement that saves you from buying three separate parts. It’s overkill for a single-spindle failure but ideal if you’re rebuilding a deck or replacing all spindles at once.