M110385 Mower Deck Gauge Wheel Arm Shaft Part Fit For JD Most Compact Utility Tractor & Lawn & Garden Tractors LX172 LX173 LX176 GT225 GT235 GT242 GT245 320 325 335 345 425 445 455 2210 4010 4110

What It Is

The M110385 is a replacement gauge wheel arm shaft for John Deere mower decks. It supports the gauge wheel assembly, allowing the wheel to pivot and maintain consistent deck height across uneven terrain. This part is used on most John Deere compact utility tractors and lawn & garden tractors, including LX, GT, and 300/400 series models.

Fitment & Compatibility

Before buying, verify your mower deck model and series. This shaft fits John Deere models: LX172, LX173, LX176, GT225, GT235, GT242, GT245, 320, 325, 335, 345, 425, 445, 455, 2210, 4010, 4110. It works with 48-inch, 54-inch, and 60-inch decks, but confirm your deck’s specific arm shaft length and diameter. The M110385 is an aftermarket replacement for the OEM John Deere part (same part number). Measure your existing shaft’s overall length and pivot hole diameter to ensure match—common lengths are ~6-7 inches with a 5/8-inch pivot hole. Check that your gauge wheel bracket and hardware are not worn; the shaft itself is the pivot pin.

Key Things to Know

• Quality: Aftermarket steel construction, typically zinc-plated to resist rust. Expect similar durability to OEM, but inspect for burrs or slight finish differences.
• Installation difficulty: Easy (15-30 minutes). Requires removing the old shaft, cleaning the bracket, and inserting the new shaft with a cotter pin or retaining clip. No special tools—just a wrench and pliers.
• Common gotcha: The shaft can seize in the bracket if old grease hardens. Apply anti-seize or grease during installation to prevent future binding. Also, check that the wheel itself spins freely—if the wheel bearing is shot, replace it too.
• Fitment nuance: Some compact utility tractors (e.g., 4010, 4110) may use a slightly longer shaft. Measure your old shaft before ordering to avoid a mismatch.

Should You Buy It

If your John Deere LX, GT, or 300/400 series tractor has a worn, bent, or seized gauge wheel arm shaft, this is a direct, affordable replacement. It’s ideal for DIY owners who want to restore smooth deck height adjustment without paying OEM markup. Skip it if your deck uses a different pivot design (e.g., some 54-inch decks on newer models). For the price and rating, it’s a solid buy for most common JD decks.