3 Pack GY21098 Spindle Assembly with GX22616 Spindle Pulley Replaces AUC15811 GY20454 GY20867 GY20962 for John Deere D140 D155 D160 E140 E150 E160 E170 LA145 LA155 S140 S160 S170 Tractors

What It Is

This is a 3-pack of spindle assemblies (with pulleys pre-installed) designed to replace the factory spindles on select John Deere 100-series lawn tractors. It’s for the cutting deck’s blade drive system—each spindle holds a blade and connects to the belt via the pulley. If your deck is vibrating, blades won’t spin, or the pulley is worn, this is the part.

Fitment & Compatibility

Check your deck size first. This pack fits 42-inch and 48-inch Edge/Edge Xtra decks on these models: D140, D155, D160, E140, E150, E160, E170, LA145, LA155, S140, S160, S170. It will not fit 54-inch decks or older 100-series tractors (like LA100/110/120/130).

OEM cross-references: Replaces John Deere GY21098, GY20454, GY20867, GY20962, AUC15811, and GX22616 (pulley). If your tractor uses any of those numbers, it’s compatible.

Measure before buying: The spindle shaft diameter is 5/8-inch (common for these decks). The pulley is 4.5 inches wide. If your deck uses a different pulley size or a 1-inch shaft, this won’t work.

Aftermarket note: This is a generic replacement, not OEM John Deere. Quality is acceptable for residential use, but the bearings may not last as long as factory parts under heavy or commercial use.

Key Things to Know

• Installation difficulty: Moderate. You’ll need a socket set, a torque wrench (specs: 40-50 ft-lbs for spindle bolts), and a jack to lift the deck. Expect 1-2 hours for all three.
• Common gotcha: The pulley retaining nut is reverse-threaded on some models. Check your deck before forcing it—lefty-tighty for removal on those.
• Quality note: Bearings are sealed but not greasable. Some users report noise after 1-2 seasons in wet or sandy conditions. Apply anti-seize to the spindle shaft to ease future removal.
• Pack includes: Three spindles with pulleys, mounting bolts, and lock washers. No blades or belt included.

Should You Buy It

Buy this if you have a 42- or 48-inch deck on a listed John Deere 100-series tractor, need to replace all three spindles at once to save labor, and don’t mind aftermarket parts for residential mowing. Skip it if you want OEM durability, have a 54-inch deck, or need a single spindle (buy individually instead).