AM120680 Right Front Mower Deck Gauge Wheel Arm for JD 54C & 62C Mower Decks, 7/8" Shaft Diameter, Deck Gauge Wheel Support Arm Replacement for GT245 GX255 GX335 GX345 GX355 X465 X485 X495 X500 X520

What It Is

The AM120680 is a right front gauge wheel arm for John Deere 54C and 62C mower decks. It supports the front of the deck to prevent scalping and stabilize cutting height on uneven terrain. Designed for compact tractors and select X-series lawn tractors.

Fitment & Compatibility

• Deck size: Fits 54C and 62C side-discharge decks only. Not for 48C or 7-Iron decks.
• Shaft diameter: 7/8" – measure your existing arm’s shaft with a caliper; 1" shafts won’t work.
• OEM cross-reference: Replaces John Deere AM120680 (genuine part). Aftermarket copy; quality may vary.
• Compatible models: GT245, GX255, GX335, GX345, GX355, X465, X485, X495, X500, X520. Check your deck’s model number (stamped on top or side) before ordering.
• Position: Right front only. Left front is a different part (AM120679).

Key Things to Know

• Build quality: Some users report thinner metal than OEM, which can bend under heavy use on rough ground. Inspect weld joints and pivot hole for burrs.
• Installation: Simple bolt-on (one bolt, one cotter pin). Expect 15-30 minutes. You may need a punch to align the pivot hole.
• Common gotcha: The included bushing may be a loose fit. If the arm wobbles, reuse your original OEM bushing or add a washer to take up slack.
• Price vs. OEM: At ~$30, it’s roughly half the cost of a genuine John Deere part. Acceptable for light residential use, but not for commercial mowing.

Should You Buy It

If you have a 54C or 62C deck on a compatible JD tractor and need a budget-friendly replacement for a bent or worn right front gauge wheel arm, this will work for light-duty residential mowing. For heavy use, frequent scalping, or commercial work, spend the extra for OEM – the aftermarket arm may not hold up.