BOSFLAG Spindle Assembly 3-Pack 139-3214 for Toro SS4225/SS4235/SS5000 Decks — Heat-Treated Housing & Sealed Bearings

BOSFLAG 3 Pack 139-3214 spindle assemblies are OEM-fit replacement spindles designed to restore cutting performance on compatible Toro and eXmark riding mowers.

If your mower deck is vibrating, producing uneven cuts, or the blades no longer spin freely, worn spindle assemblies are often the culprit. This three-pack of BOSFLAG 139-3214 spindles gives you immediate spares for multi-deck maintenance or to fully rebuild a single mower deck. Each spindle is engineered to fit the same mower models and part numbers commonly used on Toro Timecutter, Timecutter SS, MX and many Lawn Tractor series, plus select eXmark models.

Which mower models and part numbers do these spindles replace?

These BOSFLAG spindles are direct-fit replacements for Toro part numbers 139-3214, 121-0751, 117-7439, 117-7267, and 117-7268, and they cover an extensive list of Toro Timecutter, Timecutter SS, SS, MX and Lawn Tractor model families. They also match kompatibility with several eXmark drive lever model designations. Using a matching spindle part number helps ensure bolt pattern, shaft diameter, and mounting height align for hassle-free installation.

• Fits Toro Timecutter SS, SS4225/4235/5000 and many MX/MX5000 series machines.
• Compatible with a wide range of Toro lawn tractor model numbers listed for deck replacements.
• Interchanges with specific eXmark model groups where the spindle geometry is equivalent.

How durable and reliable are these BOSFLAG spindle assemblies?

Each spindle is manufactured from durable materials designed for residential mowing conditions, with heat-treated components and precision bearings to resist wear. While not a manufacturer original, these spindles are built to provide consistent service life when installed and maintained correctly. Proper torqueing, correct blade balance, and routine lubrication will extend their longevity.

• Heat-treated spindle housing and shaft for strength under load.
• Sealed or shielded bearings to reduce contamination and extend life.
• Three-pack option reduces downtime by keeping spares on hand.

What is included in the 3-pack and what tools or steps are needed for installation?

The package includes three complete spindle assemblies ready for deck installation. You’ll typically remove the mower deck, take off blades and pulleys, unbolt the old spindles, and install each replacement using the original mounting hardware or recommended torque values. Basic hand tools and a service manual for your mower model are all you need for a standard replacement job.

• Three assembled spindle units—no extra assembly required.
• Follow OEM torque specs and recheck blade balance after fitting.
• Common tools: socket set, torque wrench, jack or deck support, safety gloves.

Will using these spindles affect mower safety or warranty?

These replacement parts are aftermarket components intended to match the form, fit, and function of the referenced OEM spindles. Installing aftermarket spindles typically does not change safe operation when fitted correctly, but check your mower's warranty terms since some manufacturers restrict third-party parts. Always follow safety protocols: disconnect spark plug, secure the deck, and wear protective equipment while working.

• Aftermarket fit—designed to mirror OEM dimensions and function.
• Installation safety: disconnect power and stabilize the mower before work.
• Check your product warranty for third-party part guidance.

Who is this for: The BOSFLAG 3 Pack 139-3214 is aimed at homeowners, landscape pros, and service shops who maintain Toro Timecutter and compatible Lawn Tractor decks and want a cost-effective way to replace multiple worn spindles or keep spares on hand. If you service several machines, rebuild a full deck, or prefer having immediate replacements to minimize downtime, this three-pack offers practical value and straightforward compatibility.