Arm & Sheave Pulley – Fits John Deere 48" Mower Decks (Replaces AM146226, AM106627)

$27.99 $44.00

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Product Details

This aftermarket Arm & Sheave Pulley assembly serves as a replacement idler pulley for John Deere 48" mower decks, commonly found on X300, X320, X500, and X700 series riding mowers and lawn tractors.

It is a direct replacement for John Deere part numbers AM146226 and AM106627, and also interchanges with Caltric TCA17146.

Installation Type: Direct bolt-on replacement.
Function: Tensions the mower deck's drive belt for optimal performance.
Material: Constructed from durable steel for longevity.

Part Number Matrix

Use this matrix to confirm equivalent references across OEM and aftermarket.

Brand	Part Number
John Deere	AM146226
John Deere	AM106627
Caltric	TCA17146

Engine & Model Compatibility

Confirm your equipment model in the table below.

This pulley fits various John Deere riding mowers equipped with a 48-inch deck.

Brand	Model	Deck Size	OEM Part No.	Notes
John Deere	X320	48"	AM146226, AM106627	Idler pulley for mower deck
John Deere	X534	48"	AM146226, AM106627	Referenced in source
John Deere	X540	48"	AM146226, AM106627	Referenced in source
John Deere	X590	48"	AM146226, AM106627	Referenced in source
John Deere	X750	48"	AM146226, AM106627	Referenced in source
John Deere	X754	48"	AM146226, AM106627	Referenced in source
John Deere	X758	48"	AM146226, AM106627	Referenced in source

Technical Specs

Product Type: Deck Sheave & Arm Pulley (Idler Pulley)
Installation: Direct replacement
Housing Material: Steel
Housing Color: Black/Metal
Dimensions: 62.5 x 27.0 x 10.0
Fitting Type: Direct fit
Primary Function: For drive belt tensioning on mower deck

What’s in the Box

1 x Deck Sheave & Arm Pulley (AM146226/AM106627)

Installation Notes

For your safety, disconnect the spark plug wire and engage the parking brake before starting.
Lower the mower deck to its lowest setting to relieve belt tension.
Carefully release the tension on the main drive belt and remove it from the idler pulley.
Unbolt and remove the worn or damaged arm and sheave pulley assembly.
Mount the new pulley assembly, ensuring it aligns correctly with the deck's mounting points.
Tighten the mounting bolt to the manufacturer's recommended torque specification.
Route the drive belt correctly around all pulleys, including the new idler.
Double-check belt tension and alignment before reconnecting the spark plug.

Troubleshooting & FAQ

How do I know if this idler pulley needs to be replaced?

Signs of a failing pulley include excessive noise (squealing or grinding), visible wobble or physical damage to the pulley, or the drive belt frequently slipping off.

Is this part compatible with mower decks other than 48 inches?

This pulley assembly is specifically designed for 48" John Deere decks. Using it on other sizes is not recommended as it can lead to incorrect belt tension, alignment issues, and potential damage.

Does this assembly include the mounting bolt or other hardware?

The package includes the arm and sheave pulley as pictured. Mounting hardware like bolts and nuts should typically be reused from the old part unless they are damaged.

What's the primary cause of idler pulley failure?

The most common cause is wear and tear on the bearing from constant rotation and exposure to debris, grass, and moisture. Impact damage can also cause failure.

OEM vs. Aftermarket?

This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.

Shipping speed & cost

We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.

Warranty & returns

Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.

Safety & Important Info

Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
This is an aftermarket replacement, not an OEM component.
Professional installation is recommended for safety and performance.

About Sea Sierra

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