Cogged Pump Belt 1/2" x 64" Compatible with Lawn Mower Exmark Toro 119-3321 119-3321-SL,TimeCutter ZS5000 SS5000 SS5060 MX5060 Riding Mowers

What It Is

This is a cogged pump belt (1/2" x 64") that drives the hydraulic pump on select Exmark and Toro zero-turn mowers. It’s a replacement part for mowers with broken or worn belts that cause loss of drive power or hydrostatic pump failure.

Fitment & Compatibility

Before buying, verify:

• Length & width: Must be exactly 1/2" wide and 64" long (measured around the pulley path). A 64.5" belt will be too loose; 63.5" too tight.
• OEM cross-reference: Replaces Toro 119-3321 and 119-3321-SL (the “-SL” is a service label variant, same belt).
• Mower models: Fits Toro TimeCutter ZS5000, SS5000, SS5060, MX5060. Also fits some Exmark mowers using the same pump belt (check your model’s deck size—typically 50" or 60" decks on these).
• Check your deck size: The belt is used on 50" and 60" deck models, but not all. Look up your mower’s model number (e.g., 74710, 74720) on Toro’s site to confirm.
• Note: This is not a drive belt for the blades. It’s only for the hydrostatic pump.

Key Things to Know

• Quality: Aftermarket belt; reviews average 4.0 stars. Some users report slightly shorter life than OEM Toro belts, but fine for moderate use.
• Installation difficulty: Moderate. You’ll need to remove the mower deck and possibly the left-side fender to access the pump pulley. Expect 30–60 minutes if you’re handy.
• Common gotchas: The belt must be routed correctly around tensioner and pump pulley—take a photo before removing the old one. If the belt is too loose after installation, check tensioner spring condition.
• Cogged design: The cogs reduce slipping and heat buildup. Do not substitute a non-cogged belt—it will wear faster and may slip.

Should You Buy It

Buy this if your Toro TimeCutter or compatible Exmark mower loses drive power and the pump belt is cracked, frayed, or stretched. It’s a cost-effective alternative to OEM at $20, but if you mow commercially or want maximum longevity, stick with the OEM Toro belt (typically $30–$35). For residential use with occasional replacement, this belt works fine.