Parts Camp John Deere Mower Deck Spindle Assembly — Fits LX280/LX289/X300 Series, 5.5" Height & 5" Pulley, Grease Zerk

Parts Camp replacement spindle assembly restores smooth blade rotation for John Deere decks that use AM144377/AM124498/AM131680-style spindles.

If your lawn tractor’s cutting performance has declined or you hear grinding and vibration from the deck, this fully assembled spindle cartridge is built to bring your mower back to factory-like operation. Designed to match OEM dimensions, it fits John Deere LX280, LX289, GX325, GX335, LT180, LT190, X300, X320 models and many 42", 48", 54" and 62" decks that use the listed part numbers. The unit ships pre-assembled for bolt-on replacement and includes a grease zerk for easy periodic lubrication to prolong bearing life.

How will this spindle improve my mower’s cutting performance?

Worn or noisy spindles cause blade wobble, uneven cuts and extra vibration. Installing a new spindle assembly removes play in the hub and restores concentric blade rotation so cuts are cleaner and deck operation is quieter.

• Replaces OEM part numbers AM144377, AM131680, AM135349, AM124498.
• Precise 4-bolt mounting pattern aligns with original deck shells.
• 5.5" overall height and 5" pulley outer diameter match factory dimensions.
• Sealed bearings reduce runout and vibration.

Is this spindle durable and easy to maintain?

The assembly uses a heavy-duty housing and premium sealed bearings for long service life under normal mowing conditions. A pre-installed grease zerk lets you add grease periodically to keep bearings cool and free of debris.

• High-grade housing resists corrosion and impact.
• Premium sealed bearings for quiet, smooth rotation.
• Grease zerk hub access for routine lubrication.
• Maintenance reduces moisture- and dirt-related premature wear.

Will this fit my John Deere model and deck size?

This spindle is manufactured to exact OEM measurements so it fits models that call for the specified part numbers and deck sizes. Always cross-reference your tractor’s original spindle part number and deck dimensions before ordering.

• Compatible with LX280, LX289, GX325, GX335, LT180, LT190, X300, X320.
• Works with 42", 48", 54" and 62" mower decks using listed OEM numbers.
• Confirm original part number (AM144377, AM131680, AM135349, AM124498).
• Measures 5.5" height and 5" pulley OD for accurate fitment.

How simple is installation and what tools are required?

The Parts Camp spindle arrives fully assembled and ready to bolt into your deck, reducing repair time compared with bearing-only replacements. Basic hand tools and a torque wrench are usually sufficient for removal and installation, but follow your mower’s service manual for torque specs and safety steps.

• Pre-assembled unit ready for bolt-on replacement.
• Standard hand tools and torque wrench recommended.
• Minimal downtime compared with disassembling existing spindle.
• Refer to tractor manual for mounting torque and safety instructions.

Who is this for: This Parts Camp spindle assembly is intended for homeowners and professional landscapers who own John Deere lawn tractors that list AM144377, AM124498, AM131680 or AM135349 as the deck spindle part number. It’s a practical option for anyone seeking an OEM-dimension, maintenance-friendly replacement to restore cutting performance and reduce deck vibration without extensive downtime.