8TEN Idler Pulley for John Deere Ztrak 997 Mid-Mount Z997R Diesel 1600 Turbo WF1600 60 72-Inch Deck AN15237

What It Is

The 8TEN Idler Pulley is an aftermarket replacement part designed to guide and tension the drive belt on John Deere Ztrak 997 and Z997R diesel zero-turn mowers, as well as the 1600 Turbo and WF1600 models, specifically for 60- and 72-inch mid-mount decks. It replaces OEM part AN15237.

Fitment & Compatibility

Before buying, verify these three things:

• Deck size: This pulley fits 60-inch and 72-inch decks only. Does not fit 48- or 54-inch decks on these models.
• Model check: Confirmed for John Deere Ztrak 997, Z997R Diesel, 1600 Turbo, and WF1600. Not for gas-powered Ztrak models (e.g., 757, 850).
• OEM cross-reference: Replaces OEM number AN15237. Measure your old pulley: this one has a 3.5-inch outer diameter and a 5/8-inch bore with a 1-inch flange. If your stock pulley matches these dimensions, it will fit.
• Belt alignment: Ensure your deck belt is not worn or stretched; a new pulley won’t fix alignment issues from a bad belt.

Key Things to Know

• Quality: 8TEN is a budget aftermarket brand. Expect decent steel construction with sealed bearings, but not the same longevity as OEM John Deere pulleys.
• Installation difficulty: Easy (1/10). Remove the belt, unbolt the old pulley (usually a single 5/16-inch bolt), install the new one, and re-tension the belt. No special tools required.
• Common gotcha: The bolt may be tight or rusted. Use penetrating oil and a breaker bar. Do not overtighten—torque to 20-25 ft-lbs max to avoid bearing damage.
• Noise: Some users report a slight whine at high RPM after install. This usually goes away after a few hours of use as the bearing seats.

Should You Buy It

This is a solid budget option if you need a quick, functional replacement and don’t want to pay $60+ for the OEM pulley. It’s best for DIY homeowners or light commercial users. If you run a commercial mowing operation with heavy daily use, spend more on an OEM or high-end aftermarket pulley for better bearing durability.