UDC Parts Mower Kit/Pulley 956-04129 + Pulley GY20629 / Fits Huskee LT-4200 LT-4600

What It Is

This is a replacement pulley kit for the spindle drive system on Huskee LT-4200 and LT-4600 lawn tractors (and compatible models). It includes two pulleys—one upper (part 956-04129) and one lower (part GY20629)—that transfer belt power from the engine to the cutting blades.

Fitment & Compatibility

Before buying, verify these three things:

• Deck size: Fits 42-inch and 46-inch cutting decks used on Huskee LT-4200 and LT-4600 models. Check your deck’s stamped model number.
• OEM part cross: Replaces original Huskee/MTD pulleys 956-04129 (upper) and GY20629 (lower). Confirm your current pulley part numbers match.
• Physical check: Measure the pulley outer diameter (approx. 4–5 inches) and shaft hole size (commonly 5/8-inch or 3/4-inch) to ensure it fits your spindle. Count the belt grooves (single or double) and compare to your old pulley.

Not compatible with zero-turn mowers, Craftsman, or other brand decks without checking dimensions first.

Key Things to Know

• Quality: UDC is a budget aftermarket brand. Expect functional but basic steel construction—fine for residential use, but not as durable as OEM for heavy commercial duty.
• Installation difficulty: Moderate. You’ll need a socket set, a puller for stubborn pulleys, and possibly a breaker bar. Plan 30–60 minutes per pulley.
• Common gotchas: The upper pulley often has a hex-shaped bore that can strip if over-tightened. Use a torque wrench (specs ~25–35 ft-lbs). The lower pulley may require removing the deck or blade brake system for access.
• Belt alignment: After installation, check belt tracking. Misaligned pulleys cause belt wear or slipping—adjust deck leveling if needed.

Should You Buy It

If you own a Huskee LT-4200 or LT-4600 and need a budget-friendly fix for worn or seized spindle pulleys, this kit works for light to medium residential mowing. It’s a direct fit for the listed models and costs less than OEM, but skip it if you need heavy-duty longevity or have a different brand deck. For the price and single review (5 stars), it’s a low-risk gamble for DIY repair.