MTD Genuine Parts 33" Mulching Deck with Cover – OEM 631-04252, 33in Mulch Assembly for Lawn Tractors

MTD Replacement Part 33" Mulching with Cover is an OEM-authorized mulching deck assembly component (part number 631-04252) designed to restore mulching performance on compatible MTD lawn tractors.

This genuine MTD replacement part is manufactured in the United States and matches factory specifications for fit and function. It is intended as a direct replacement for worn or damaged mulching components on a range of MTD models, helping you maintain consistent grass clipping circulation and an even cut. Because it’s OEM-authorized, the part installs to original mounting points and preserves the mower’s intended mulching behavior.

Which MTD models does this 33" mulching with cover fit?

This assembly fits many popular MTD model numbers and is not limited to the list provided by the manufacturer. Confirm compatibility by comparing the OEM part number 631-04252 to your machine’s parts diagram or owner’s manual before purchasing.

• Directly compatible with models such as 12A-750-190, 12AE750-190, 12A-751-190 and related sequences.
• Also fits several 12AE76-series tractors including 12AE764N709, 12AE764N710, and 12AE763Z011.
• Cross-check your tractor’s model on the deck label or service manual; OEM number 631-04252 is the definitive reference.

How does this mulching cover affect cutting and clipping distribution?

When correctly installed, the mulching cover guides clippings back into the deck to be recut and dispersed finely, resulting in slimmer clippings that return nutrients to the turf. The cover’s alignment and fit are engineered to maintain the deck’s airflow pattern so the mower cuts evenly across the 33" width.

• Improves clipping recirculation for finer mulch.
• Helps maintain factory airflows for consistent cutting across the deck.
• Prevents side discharge when mulching mode is desired.

What should I expect during installation and maintenance?

Installation follows original attachment points and basic deck removal procedures; most owners familiar with blade and deck service can install it with common hand tools. Routine maintenance includes checking fasteners, cleaning debris from the deck area, and inspecting the cover for dents or wear that could alter airflow.

• Mounts using the mower’s original hardware locations; no major modifications required.
• Clean deck and cover after each mowing season to prevent corrosion and buildup.
• Inspect for deformation or cracks that could affect mulching performance.

Why choose an OEM-authorized mulching cover versus aftermarket alternatives?

OEM-authorized parts like this MTD mulching cover are produced to match the original component’s dimensions and materials, which reduces fitment issues and preserves the machine’s designed performance. Choosing OEM helps protect resale value and simplifies compatibility checks by using the official part number.

• OEM Part Number 631-04252 ensures exact fit and correct mounting geometry.
• Manufactured in the USA to MTD-authorized specifications for quality control.
• Reduces risk of altered airflow or improper clearances that can occur with nonmatching parts.

Who is this for: This MTD 33" mulching with cover is aimed at owners and service technicians of MTD lawn tractors who need a reliable, factory-spec replacement. It’s a practical choice for people replacing a damaged deck cover, restoring mulching capability, or maintaining performance on models listed by MTD. Verify your tractor’s model and match OEM part number 631-04252 before ordering to ensure correct compatibility.

• This is an O.E.M. authorized part
• Fits various MTD models
• OEM Part Number 631-04252
• This is a MTD replacement part