AM120681 Right Rear or Left Front Mower Deck Gauge Wheel Arm for JD 54C & 62C Mower Decks, 7/8" Shaft Diameter, Replacement for GT245 GX255 GX335 GX345 GX355 X465 X485 X495 X500 X520

What It Is

This is a replacement gauge wheel arm for John Deere 54C and 62C mower decks. It supports the deck’s outer edge to prevent scalping and maintain consistent cut height. Designed for use on the right rear or left front positions, it fits compact and garden tractors with a 7/8-inch shaft diameter.

Fitment & Compatibility

Before buying, confirm your deck model is either a 54C or 62C (check the deck’s ID tag). This arm fits tractors including GT245, GX255, GX335, GX345, GX355, X465, X485, X495, X500, and X520—but only when equipped with those decks. Measure your existing arm’s shaft diameter: it must be exactly 7/8-inch. This is an aftermarket replacement for OEM part AM120681; it’s not a genuine John Deere part. Verify the arm’s mounting bracket and wheel bolt pattern match yours, as some deck configurations vary.

Key Things to Know

• Quality concerns: With a 3.7 rating and only 6 reviews, some users report the metal is thinner or the weld is less robust than OEM. Inspect for straightness before installation.
• Installation difficulty: Moderate. You’ll need to lift the deck, remove the old arm (may require penetrating oil on rusted bolts), and transfer the wheel and hardware. Budget 30–45 minutes.
• Common gotcha: The arm may require slight bending or shimming to align perfectly with the wheel bracket. Check clearance with the deck belt and pulley before tightening fully.
• Durability: Not recommended for heavy commercial use or rough terrain. It’s fine for residential mowing on moderate lawns.

Should You Buy It

Buy this if you need a budget-friendly replacement for a worn or bent gauge wheel arm on a 54C or 62C deck and you’re comfortable with minor fitment adjustments. Skip it if you want OEM-grade durability, need a perfect bolt-on replacement, or have a different deck size or shaft diameter.