139-3214 Spindle Assembly with 125-5575 Pulley Replaces Toro 139-3214 Spindle Toro 121-0751 Spindle Assembly, Toro 117-7267 Spindle, Toro 117-7439 for Toro SS5000, SS5060 Lawn Mowers

What It Is

This is a complete spindle assembly with a pre-installed 125-5575 pulley, designed to drive the cutting blade on Toro SS5000 and SS5060 lawn mowers. It replaces OEM part numbers 139-3214, 121-0751, 117-7267, and 117-7439, making it a direct fit for these specific zero-turn models.

Fitment & Compatibility

Before buying, confirm your mower’s model number (found on the frame or under the seat). This assembly is for Toro SS5000 and SS5060 models only—it will not fit other Toro series (e.g., TimeCutter, Z-Master) without modification. Check your deck size: these spindles are designed for 54-inch and 60-inch cutting decks. Measure the existing spindle housing diameter and bolt pattern (typically 3-bolt, 4.25-inch center-to-center) to verify match. If your mower uses a different pulley diameter (e.g., 4.5-inch vs. 5.5-inch), this unit may alter belt tension or blade speed.

Key Things to Know

• Quality: This is an aftermarket replacement, not OEM Toro. It includes a steel housing and sealed bearings, which often outlast original plastic components. Expect similar durability at a lower price point.
• Installation Difficulty: Moderate. You’ll need a jack or lift to access the deck underside, plus basic tools (socket wrench, torque wrench, and a puller for the old pulley if seized). Budget 1–2 hours.
• Common Gotcha: The pulley is pre-installed, but the blade mounting bolt is not included—use your original or buy a new one (typically 5/16-24 thread). Torque to 30–35 ft-lbs.
• Warranty: Check the seller’s return policy; some aftermarket spindles have a 30-day window vs. OEM’s 2-year warranty.

Should You Buy It

If you own a Toro SS5000 or SS5060 and need a cost-effective, drop-in replacement for a worn or wobbling spindle, this is a solid choice. It avoids the OEM price premium while delivering reliable performance for residential or light commercial use. Skip it if you prefer genuine Toro parts for warranty coverage or have a different model.