Spindle Assembly for MTD Troy-Bilt 46" Deck 918-06989 618-06989 T1600 LT4600

Spindle Assembly for MTD Troy-Bilt 46" Deck

This spindle assembly for MTD Troy-Bilt 46 inch decks replaces worn or damaged deck spindles, cross-referencing OEM numbers 918-06989 and 618-06989.

Overview

The spindle assembly for MTD Troy-Bilt keeps your mower deck turning smoothly, supporting the blade hub so cutting stays even across the full 46 inch swath. Built for riding mower owners servicing a worn deck, this 918-06989 spindle assembly restores the blade drive on T1600 and LT4600 style machines. The 618-06989 cross-reference makes it a direct replacement for the original spindle.

Built For Performance

• Direct cross-reference to OEM part numbers 918-06989 and 618-06989
• Fits 46 inch mower decks on compatible MTD and Troy-Bilt riding mowers
• Housing, shaft and mounting points supplied as a complete assembly
• Sealed bearing design supports consistent blade rotation
• Steel construction built to handle regular mowing loads

Fits These Machines

• for Troy-Bilt T1600 riding mower
• for Troy-Bilt LT4600 riding mower
• for MTD riding mowers with 46 inch decks

On-The-Job Use

• Replacing a noisy or seized deck spindle
• Restoring an uneven cut caused by worn spindle bearings
• Routine deck maintenance on riding mowers
• Keeping the blade turning true across a 46 inch cutting path

Specs At A Glance

Good To Know

Q: How do I know this spindle fits my deck? A: Match the OEM numbers 918-06989 or 618-06989 and confirm your deck measures 46 inches. If your original spindle carries either number, this assembly cross-references it.

Q: Should I replace spindles in pairs? A: If two spindles show similar wear or age, replacing them together helps keep blade height consistent. Inspect all spindles on the deck before ordering.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.