Fourtry spindle assembly for John Deere L100-series 2-Pack — Greasable 42"/48" deck replacement, pre-greased with hardware

Fourtry GY20050 is a direct-fit, greasable deck spindle assembly designed to replace John Dee re GY20050/GY20785 on 42" and 48" L100-series lawn mower decks, sold here as a 2-pack.

If your John Dee re L100-series mower is showing deck vibration, uneven cutting, or difficulty spinning blades, a worn spindle is often the cause. The Fourtry spindle kit arrives pre-greased, includes mounting hardware, a pulley lock nut, blade adapter and a grease fitting, making it a practical swap for common deck maintenance that restores reliable blade rotation and extends deck life.

How will this spindle fit my John Dee re mower?

The Fourtry GY20050 spindle is engineered to match the bolt pattern, shaft size and overall geometry of the John Dee re L100-family spindles used on 42" and 48" decks. It is intended as a direct replacement for OEM parts GY20050 and GY20785—verify your existing part number and deck size before ordering.

• Compatible models: John Dee re L100, L105, L107, L108, L110, L111, L118, L120, L130
• Deck sizes: 42-inch and 48-inch configurations
• Replaces OEM GY20050 and GY20785—confirm part number

What comes in the kit and how easy is it to install?

This 2-pack of Fourtry spindles ships with the key components needed for a straightforward replacement: pre-installed grease fitting, pulley lock nut, blade adapter and four threaded mounting bolts. The mounting holes are threaded, so you don’t need to chase or tap bolt holes; basic hand tools and a torque wrench are typically all that’s required.

• Included: pulley lock nut, blade adapter, grease fitting, 4 mounting bolts
• Mounting holes are threaded—reduces install steps
• Pre-greased for immediate use; greasable for continued maintenance

How does the greasable design affect durability and maintenance?

Fourtry spindles come pre-greased and incorporate a grease fitting so you can perform periodic lubrication without disassembly. Regular greasing reduces friction and bearing wear, helping the spindle run cooler and last longer under lawn-mower loads.

• Pre-greased bearings for initial installation
• Grease fitting allows on-frame lubrication maintenance
• Reduces downtime by extending bearing life when maintained

Will this replace my current symptoms like wobble or poor cutting?

A failing spindle is a common cause of blade wobble, uneven cut heights and noisy decks; replacing the spindle often corrects those symptoms if the blade, pulley and belt are in good condition. Inspect blades and pulleys at the same time—replacing the spindle while other components are worn may not fully resolve cutting issues.

• Fixes spindle-related vibration and blade misalignment when other parts are sound
• Good practice: inspect/replace blades, pulleys, and belts during spindle swap
• Sold as a convenient two-piece set for replacing both spindles on multi-spindle decks

Who is this for: The Fourtry GY20050 spindle kit is aimed at backyard owners and small property managers who maintain John Dee re L100-series tractors with 42" or 48" decks, and at DIY mechanics who prefer a ready-to-install, greasable spindle replacement. If you already know your tractor uses OEM GY20050 or GY20785 and you want a practical, cost-effective 2-pack solution with hardware included, this product is built for that service interval.