539112170 Spindle Assembly with 532173436 153535 Pulley for 48" 52" 61" Deck, Compatible with Hu-sqvarna EZ4824 EZ4824BF RZ4824 EZ5221 EZ5224 MZ52 MZ6128 Lawn Mower, 3 Pack

What It Is

This is a 3-pack of replacement spindle assemblies (part 539112170) with pre-installed pulleys (532173436/153535) for 48", 52", and 61" cutting decks. It’s designed for Husqvarna and compatible models, used to drive the mower blades on zero-turn and riding mowers.

Fitment & Compatibility

Before buying, confirm your deck size matches 48", 52", or 61". Check your mower model—this fits Husqvarna EZ4824, EZ4824BF, RZ4824, EZ5221, EZ5224, MZ52, and MZ6128, plus compatible variants. Measure the spindle shaft diameter (typically 1") and pulley size (about 4.5" outer diameter) to match your old part. Verify the bolt pattern (3-bolt, 3.5" center-to-center) and spindle housing depth (approx. 2.5"). Cross-reference OEM part numbers 539112170, 532173436, and 153535. Not universal—skip if your deck uses a different spindle design.

Key Things to Know

• Quality: Aftermarket part with 4.6/5 stars from 3 reviews; steel housing and sealed bearings are standard. Expect similar durability to OEM but not identical.
• Installation: Moderate difficulty—requires removing the deck, unbolting the old spindle, and transferring the blade. Use a torque wrench (40-60 ft-lbs for spindle bolts).
• Gotchas: Pulley may need a spacer or washer if your deck has a raised center. Check blade alignment after install to avoid vibration. The 3-pack is for 3-spindle decks; don’t buy if you have a 2-spindle model.
• Compatibility: Double-check your mower’s deck part number—some Husqvarna models use different spindles (e.g., 48" decks with 42" spindles). Email seller with your model if unsure.

Should You Buy It

If you own a Husqvarna zero-turn with a 48", 52", or 61" deck and need to replace all three spindles, this 3-pack offers good value at $69.99. It’s best for DIYers comfortable with deck removal and who want a budget-friendly alternative to OEM parts. Skip it if you require exact OEM fitment or only need one spindle.