754-05040 954-05040 Drive Belt for MTD Troy Bilt Pony TB30 TB30R 36T 42 42T 42X TB42 TB42T Garden Lawn Mower Tractor Replaces 578453623 754 05040 954 05040

What It Is

This is a replacement drive belt for MTD-built Troy-Bilt Pony and TB series lawn tractors. It transfers power from the engine pulley to the transmission, enabling forward and reverse motion.

Fitment & Compatibility

Before buying, verify your machine’s deck size and model series. This belt fits:

• Troy-Bilt Pony models: TB30, TB30R, 36T, 42, 42T, 42X, TB42, TB42T
• Deck sizes: 30”, 36”, 42”
• OEM cross-references: Replaces MTD 754-05040, 954-05040, and 578453623

Check these three things:

1. Measure your old belt length – this belt is approximately 94.5” long x 1/2” wide (OEM spec). If yours is shorter or longer, it won’t fit.
2. Confirm your mower model number – look under the seat or on the frame. Pony models with “R” (e.g., TB30R) use this belt; non-R variants may differ.
3. Belt routing – ensure your deck has a single drive belt setup (not a separate deck belt). This is the drive belt, not the blade belt.

Key Things to Know

• Quality vs OEM: This aftermarket belt from Drive is aramid-reinforced, comparable to OEM in durability. Some users report slightly shorter lifespan on heavy-duty use, but it’s a solid value at this price.
• Installation difficulty: Moderate. You’ll need to remove the mower deck and possibly the transmission pulley guard. A belt routing diagram is helpful – take a photo before removal.
• Common gotcha: The belt can slip if the tensioner spring is weak or the pulleys are worn. Inspect pulleys and replace the tensioner spring if the belt feels loose after install.
• Lubrication: Do not lubricate the belt or pulleys. Clean any debris from the pulley grooves before fitting the new belt.

Should You Buy It

If you own a Troy-Bilt Pony or TB series with a 30-42” deck and need a reliable, budget-friendly replacement for the OEM drive belt, this is a solid choice. It’s not the absolute longest-lasting option, but for the price and positive user feedback, it’s a safe buy for most homeowners. Avoid if you have a different brand or a non-MTD deck.