Mower Deck Gauge Wheel Arm Equipment RH Front AM136327 Replacement Parts Kit Fit For X300, X304, X310, X320, X324, X340, X360, X500, X520, X530, X534, X540, X590 Lawn and Garden Tractors

What It Is

This is a right front gauge wheel arm for the mower deck, designed to support the deck’s front edge and prevent scalping on uneven terrain. It fits select John Deere X300–X500 series lawn and garden tractors (models listed: X300, X304, X310, X320, X324, X340, X360, X500, X520, X530, X534, X540, X590).

Fitment & Compatibility

• Deck size: Works with 42–48 inch decks on these tractors (confirm your deck model, e.g., 42C, 48C, 48M).
• OEM equivalent: Replaces John Deere part AM136327 (right front arm). Verify your original part number matches before ordering.
• Measurements: Arm length is roughly 8 inches from mounting hole center to wheel axle center. Check your existing arm for similar dimensions.
• Left vs. right: This is the RH (right-hand) side only. If you need the left side, look for AM136328.
• Aftermarket note: This is a generic replacement, not OEM. Fitment may require minor adjustment on some decks (e.g., shimming or bolt alignment).

Key Things to Know

• Quality: Typically stamped steel, not cast. Adequate for residential use, but may bend under heavy loads (e.g., hitting rocks or curbs).
• Installation: Easy – remove one bolt and nut, swap arm, reinstall. No special tools. Expect 5–10 minutes.
• Common gotcha: The included wheel may be plastic or rubber; check if your deck uses a specific wheel diameter (usually 4–5 inches). If not included, reuse your old wheel.
• Durability: Threads can strip if over-tightened. Use a torque wrench (25–30 ft-lbs) to avoid damage.

Should You Buy It

Buy this if you need a budget-friendly replacement for a worn or bent right front gauge wheel arm on a compatible John Deere X300–X500 series tractor, and you’re comfortable with basic bolt-on repair. Skip it if you want OEM exactness or need the left-side arm. For heavy commercial use, consider a heavier-duty aftermarket option.