2 Pack Deck Spindle Pulley Belt Guard Cover Compatible with MTD Craftsman Troy Bilt Lawn Mowers, Fits 42 and 46 Inch Cut Decks, Replaces 783-06424A-0637 0638 OEM 783-06424A (Black)

What It Is

This is a 2-pack of black deck spindle pulley belt guards designed to replace the OEM 783-06424A part on MTD, Craftsman, and Troy-Bilt lawn mowers with 42-inch or 46-inch cutting decks. They protect the belt from debris and prevent accidental contact with the spinning pulley.

Fitment & Compatibility

Before buying, confirm your mower has a 42-inch or 46-inch stamped steel deck (not fabricated). This guard fits most MTD-built tractors and zero-turn mowers from Craftsman, Troy-Bilt, Cub Cadet, and Yard Machines that use the 783-06424A OEM guard. Measure your existing guard: it should be roughly 4.5 inches in diameter with a center hole for a 5/16-inch bolt. Does not fit decks with integrated belt covers or older models with different bolt patterns. Cross-reference your model number with 783-06424A, 783-0637, or 783-0638.

Key Things to Know

• Material: Black powder-coated steel—decent rust resistance but not stainless; inspect for chipping before install.
• Installation: Easy bolt-on swap—remove one center bolt per guard, no special tools needed. Takes 5 minutes total.
• Gotcha: This is a 2-pack, but some 46-inch decks need only one guard (the other pulley may have a different cover). Check your deck layout.
• Fitment: Slightly thinner stamped metal than OEM; may vibrate if not tightened fully. Use thread locker if needed.

Should You Buy It

If you need to replace a missing or damaged belt guard on a 42-inch or 46-inch MTD/Craftsman/Troy-Bilt deck, this is a solid, affordable option. It won’t win any durability awards, but for $19 and a 4.8-star rating, it’s a direct, easy fix for most homeowners. Not for commercial use or odd-sized decks.