Troy-Bilt Lawn Tractor Mandrel Assembly 918-06991

Basic Information

• Part Name: Lawn Tractor Mandrel Assembly
• Manufacturer: MTD
• Category: Lawn Tractor
• Primary Function: Secures to the mower deck and spins the blades for efficient cutting

Installation & Compatibility

• Compatible Models: Fits various Troy-Bilt lawn tractor models. Please confirm this part is correct for your model before ordering.
• Installation Difficulty: Medium ? involves mounting and aligning the assembly to the deck
• Tools Required: Socket wrench, work gloves, self-tapping bolts (order part 710-1260A)

Additional Information

The MTD Lawn Tractor Mandrel Assembly, part number 918-04865A, replaces 918-04636 and 918-04636A. It includes the mandrel shaft, housing, pulley, bearing, flange nut, and spacers?everything needed to drive the blade from the mower deck.

If your lawn tractor leaves uneven cut lines or the blades stop spinning even though the belt is intact, a damaged or worn mandrel may be the cause. Replacing the full assembly helps restore smooth blade rotation and cutting consistency.

The mounting holes on the mandrel housing aren?t pre-threaded, so be sure to install it using self-tapping bolts like part 710-1260A. Always disconnect the spark plug before working near the blades and wear work gloves to protect your hands during installation.

Routine maintenance and timely mandrel replacement can extend the life of your mower deck and ensure professional-looking lawn results with every pass.