2 Pack AM144608 Spindle Assembly Kit with UC26511 Pulley for John Deere Z335E Spindles, John Deere Z345M Spindle, John Deere Z345R Spindle, John Deere Z315E Spindle, John Deere Z335M Spindles

What It Is

This is a 2-pack of aftermarket spindle assemblies (AM144608) with UC26511 pulleys, designed to replace the factory spindles on specific John Deere Z-Series zero-turn mowers. Each assembly includes the housing, shaft, bearings, and pulley needed to drive a mower deck blade.

Fitment & Compatibility

• Exact models: John Deere Z335E, Z345M, Z345R, Z315E, Z335M (check your deck size—typically 48" or 54" decks on these models).
• OEM cross-reference: Replaces OEM part AM144608. The pulley included is UC26511, which matches the factory pulley used on these decks.
• What to measure: Before buying, confirm your deck spindle bolt pattern (center-to-center on mounting holes) is 3.5" and the shaft diameter is 1" (common for these models). Also verify the pulley OD matches your belt routing—UC26511 is 5.5" diameter.
• Gotcha: This is an aftermarket set, not John Deere genuine. Fitment is generally good, but some users report slight variations in bearing quality or shaft finish. If you need exact OEM tolerances, stick with Deere parts.

Key Things to Know

• Quality: Aftermarket spindles at this price point often have lower-grade bearings than OEM. Expect 1-2 seasons of residential use before needing replacement. Commercial use may wear them faster.
• Installation difficulty: Moderate. You’ll need a socket set, torque wrench (specs: ~40-50 ft-lbs for spindle bolts), and possibly a puller to remove old spindles. Grease the new bearings before install.
• Common gotchas: The pulley may have a slightly different belt groove depth than OEM—check belt tension after install. Also, the included bolts may be metric vs. SAE; verify thread pitch (likely 5/16-18) before cranking down.
• Pack includes: 2 complete spindle assemblies with pulleys and mounting hardware. No grease or additional seals included.

Should You Buy It

If you have one of the listed Z-Series mowers and need a budget-friendly spindle replacement for occasional residential mowing, this 2-pack saves money over buying OEM singles. But if you mow commercially or want maximum durability, invest in genuine John Deere spindles.