139-2357 120-5477 115-2642 Replaces 135-0363 Pulley Spindle Assembly Compatible with 60 Inch Deck Toro Titan MAX Lawn Mower

What It Is

This pulley spindle assembly (replacement numbers 139-2357, 120-5477, 115-2642, supersedes 135-0363) is the rotating hub that drives your mower deck belt and blades. It’s designed specifically for 60-inch cutting decks on Toro Titan MAX zero-turn mowers.

Fitment & Compatibility

Before buying, confirm your mower has a 60-inch deck and is a Toro Titan MAX model (not the standard Titan or TimeCutter). Measure the spindle bolt pattern: it’s a 3-bolt mounting with 3-inch center-to-center spacing. Check your original part number—if it’s 135-0363, 139-2357, 120-5477, or 115-2642, this is a direct replacement. This is an aftermarket part, not OEM Toro, so verify the pulley diameter matches your belt path (typically 4.5 inches). Also inspect the spindle shaft length—it should be identical to your old unit to avoid blade-to-deck clearance issues.

Key Things to Know

• Aftermarket quality: This is not an OEM Toro part. One review is promising, but aftermarket spindles can vary in bearing durability and seal quality. Expect shorter lifespan than original.
• Installation difficulty: Moderate. You’ll need a socket set, possibly a puller for stubborn old spindles, and a torque wrench (tighten mounting bolts to 35-45 ft-lbs). Don’t overtighten—stripped threads are common.
• Common gotcha: The pulley may come with a different grease fitting orientation. Rotate it so the fitting faces outward for easy access. Also, pre-grease the bearings before first use.
• Belt alignment: After installation, check belt tracking. A misaligned spindle can cause premature belt wear or throw the belt. Spin the pulley by hand—it should rotate smoothly with no wobble.

Should You Buy It

Buy this if you need a budget-friendly replacement for a worn spindle on your Toro Titan MAX 60-inch deck and you’re comfortable with moderate DIY installation. It’s a solid fix for occasional-use mowers, but if you mow commercially or want maximum durability, consider spending more on an OEM Toro spindle (part 135-0363) for longer service life and guaranteed fit.