3 Pack 139-3214 Spindle Assembly with 125-5575 Pulley Replaces Toro 121-0751 139 3214 117-7267 117-7439 for Toro Timecutter 50" MX5000 MX5050 MX5060 MX5075 SS5000 SS5060 SS 5000 SW5000 Mowers

What It Is

This is a 3-pack of spindle assemblies (with pulleys pre-installed) designed to replace worn or failing spindles on Toro Timecutter zero-turn mowers with a 50-inch deck. Each assembly includes the housing, bearings, shaft, and pulley—everything needed to restore blade rotation and cut quality.

Fitment & Compatibility

Before buying, confirm your mower has a 50-inch stamped deck and is one of these Toro Timecutter models: MX5000, MX5050, MX5060, MX5075, SS5000, SS5060, SS 5000, or SW5000. These spindles replace OEM part numbers 139-3214, 121-0751, 117-7267, and 117-7439. Measure the spindle shaft diameter (should be 5/8-inch) and the pulley diameter (approx. 5 inches). If your deck uses a different pulley size or shaft, this set won’t fit. Also verify you have three spindles (two outer, one center)—some 50-inch decks use identical spindles, but confirm your center spindle matches.

Key Things to Know

• Quality vs OEM: Aftermarket spindles are typically 30-50% cheaper than OEM Toro parts. This set includes pulleys, which many OEM replacements do not. Expect slightly less durable bearings, but adequate for residential use.
• Installation difficulty: Moderate. You’ll need a jack, socket set, and possibly a puller for stuck spindles. Expect 1-2 hours for all three. Grease fittings are included—pack with lithium grease before install.
• Common gotchas: The pulley bolt can be stubborn (use penetrating oil). Deck belt routing must match the original—take photos before disassembly. Some users report the center spindle pulley sits slightly higher; you may need to adjust belt tension.
• What you get: Three complete spindle assemblies with pulleys, bolts, and grease fittings. No blade or belt included.

Should You Buy It

If you own a 50-inch Toro Timecutter and need to replace noisy, wobbly, or seized spindles without paying OEM prices, this 3-pack is a solid value for DIY maintenance. It’s best for homeowners who want a complete drop-in set with pulleys. For commercial operators or those needing maximum bearing life, consider OEM spindles instead.