Tektall Lawn Mower Spindle Assembly for Bobcat ZT3000 ZT3500 - 4171231 Direct-Fit, Pre-Lubricated Bearings

The Tektall 4171231 lawn mower spindle assembly is a direct-fit replacement for Bobcat ZT3000 and ZT3500 decks, restoring blade stability and pulley alignment with a pre-lubricated bearing and die-cast aluminum housing.

If your zero-turn mower deck wobbles, squeaks, or the blade no longer spins true after hitting a curb or hard object, replacing the spindle assembly is often the fastest, most durable repair. This Tektall unit is manufactured to match OE fit and function for part numbers 4171231, 4115850, and 4165023. It ships with the housing, spindle shaft, and bearings already included so you can complete the swap with minimal extra parts.

How will this spindle assembly affect cutting performance?

Replacing a worn or damaged spindle restores proper blade balance and pulley alignment, which reduces vibration and improves cut quality. The die-cast aluminum housing offers rigidity while the sealed, pre-lubricated bearings reduce friction and noise.

• Die-cast aluminum housing for consistent blade support
• Pre-lubricated bearings to minimize break-in time
• Restores pulley and belt alignment for even cutting
• Includes shaft and bearings to replace the entire troubled assembly

Will this part fit my mower deck?

The Tektall 4171231 spindle assembly is designed to be compatible with Bobcat ZT3000 and ZT3500 decks and replaces OE numbers 4171231, 4115850, and 4165023. Verify the part number on your existing spindle or your mower’s parts diagram before ordering to ensure a correct match.

• Fits Bobcat ZT3000 and ZT3500 models
• Direct-replacement for listed OE part numbers
• Measures and mounting pattern to match OEM dimensions
• Ships ready with bearings, reducing additional purchases

How easy is installation and what comes in the box?

Installation is straightforward for anyone comfortable removing mower decks and swapping spindles: unbolt the old assembly, transfer the blade, and mount the new spindle with supplied bearings. The package arrives ready to install, and the bearings are pre-lubricated to simplify the job.

• Box includes 1 spindle assembly and 2 bearings
• Pre-lubricated bearings minimize initial servicing
• Compatible mounting holes and shaft length for direct swap
• Standard wrenches and safety gear required for installation

How can I tell if I should replace my spindle?

Common signs include excessive vibration, blade wobble, unusual grinding or squealing noises, and uneven cutting patterns. Damage often follows impacts with fixed objects; visually inspect for bent shafts, cracked housings, or play in the bearing area before ordering.

• Feel or see blade wobble while mower is lifted and blades spun manually
• Audible grinding or scraping noises from the deck area
• Visible housing cracks or bent spindle shaft after impact
• Uneven or scalloped cutting across the reel

Who this is for: This Tektall spindle assembly is intended for homeowners, landscapers, and lawn equipment technicians who operate Bobcat ZT3000 or ZT3500 zero-turn mowers and need a reliable, ready-to-install replacement. It suits anyone who prefers a full assembly swap—bearing, shaft, and housing included—over piecemeal repairs, and for those who want OEM-compatible dimensions without sourcing multiple components. Always confirm your mower’s part number before purchase and follow safety procedures when replacing deck components.