AM120680 AM120681 Front and Rear Mower Deck Gage Wheel Arm for JD Mower Decks 54C and 62C (Selected Model), 7/8" Shaft Diameter 0.345" Hole

What It Is

This is a front and rear gauge wheel arm set (AM120680/AM120681) for John Deere 54C and 62C mower decks on select models. It supports the deck’s outer edges to prevent scalping and improve cut quality on uneven terrain.

Fitment & Compatibility

• Deck size: Fits John Deere 54C and 62C decks only—not 48C, 60D, or other models.
• Shaft diameter: 7/8″ (the arm fits over a 7/8″ shaft).
• Hole size: 0.345″ – for the wheel axle bolt.
• Model check: Compatible with select X300, X500, X700 Series tractors (e.g., X304, X534, X738). Verify your model via the JD parts catalog using OEM part numbers AM120680 (front) and AM120681 (rear).
• OEM vs aftermarket: This is an aftermarket replacement. Confirm your original arms are identical in shape and mounting holes—some JD arms have subtle differences between model years.

Key Things to Know

• Quality: Aftermarket steel arms are durable but may have slightly looser tolerances than OEM. Check for burrs on the shaft hole before install.
• Installation difficulty: Easy—remove the cotter pin, slide old arm off, slide new one on, and re-pin. No special tools needed.
• Common gotcha: The 0.345″ hole is for the wheel bolt. If your wheel bolt is larger or smaller, you’ll need a different arm or a bushing.
• Deck lift clearance: On some X500/X700 models, the rear arm can contact the deck lift linkage if not aligned perfectly. Rotate the arm slightly before pinning.

Should You Buy It

Buy this if your original JD gauge wheel arm is bent, cracked, or the hole is wallowed out, and you want a budget-friendly replacement that matches OEM dimensions. Avoid if you need a perfect OEM fit or have a non-54C/62C deck.