15280 Hydro Drive Idler Pulley & 15718 V- Idler Pulley Set for Toro Timecutter & Exmark Quest 106-2176, 119-8822

What It Is

This is a two-pulley set (15280 hydro drive idler pulley & 15718 V-idler pulley) that routes and tensions the drive belt on Toro Timecutter and Exmark Quest zero-turn mowers. It replaces OEM part numbers 106-2176 and 119-8822, and is used to maintain proper belt tension for the hydrostatic drive system.

Fitment & Compatibility

Before buying, confirm your mower model and deck size. This set fits:

• Toro Timecutter models (e.g., SS3225, SS4235, Z4200, Z5000) with 42-54" decks
• Exmark Quest models (e.g., QZT708, QZT722) with 48-54" decks
• OEM cross-references: 106-2176 (hydro idler pulley) and 119-8822 (V-idler pulley)

Check your pulley measurements: the 15280 pulley has a 3.5" outer diameter, 5/8" bore, and uses a 6202 bearing; the 15718 pulley has a 3.25" OD, 5/8" bore, and uses a 6202 bearing. If your pulleys are damaged or loose, measure bore and OD to ensure match. This is an aftermarket set—not genuine Toro, but designed to meet OEM specs.

Key Things to Know

• Bearing quality is key: These pulleys use standard 6202 bearings. Aftermarket sets may use lower-grade bearings; check reviews for durability complaints. Genuine Toro pulleys cost more but often last longer.
• Installation difficulty: Moderate. You’ll need a socket set and wrench to remove the old pulley bolts. The idler pulley is spring-loaded, so use a belt tensioner tool or pry bar to relieve tension before removing the belt.
• Common gotcha: The 15280 pulley sits on the hydro drive arm and can wear unevenly if the belt is misaligned. Inspect the belt and tensioner spring at the same time—replacing just the pulleys on a worn spring won’t fix loose belt issues.
• Check for wobble: Before installing, spin the new pulleys by hand. Any wobble or rough rotation means a defective bearing—return immediately.

Should You Buy It

This set is a budget-friendly option if you’re replacing worn pulleys on an older Toro Timecutter or Exmark Quest and don’t want to pay OEM prices. It’s right for DIYers comfortable with moderate mechanical work and who don’t mind potentially shorter bearing life. If you prefer longer durability or are fixing a commercial-use mower, spring for genuine Toro pulleys instead.