MTD Lawn Tractor Mandrel Assembly 918-06989

Basic Information

• Part Name: Lawn Tractor Mandrel Assembly
• Manufacturer: MTD
• Category: Lawn Tractor
• Primary Function: Attaches to the mower deck and spins the blades.

Installation & Compatibility

• Compatible Models: Fits various MTD lawn tractor models. Please confirm this part is correct for your model before ordering.
• Installation Difficulty: Medium — Requires basic mechanical skills to install.
• Tools Required: 5/16-inch nut driver, torque wrench, and self-tapping bolts.

Additional Information

The MTD Lawn Tractor Mandrel Assembly, part number 918-06989, replaces part numbers 918-04865A and 918-04865B. This assembly connects to the mower deck and rotates the blades for smooth, even cutting performance. The housing?s mounting holes are not threaded?be sure to use four self-tapping bolts, part number 710-1260A, which are sold separately.

If your mower produces unusual vibration or the blades don?t spin consistently, a worn mandrel assembly could be the cause. Replacing it helps restore proper blade motion and improves deck stability.

Before beginning installation, disconnect the spark plug wire. Use a 5/16-inch nut driver and torque wrench to secure the mandrel to the deck. Work gloves are recommended for safety. Always refer to your model?s parts diagram to confirm included hardware and alignment.