Spindle Assembly AM136733 / AM137483 for John Deere X300 Z245

Overview

This aftermarket AM136733 / AM137483 spindle assembly is a replacement-style mower deck spindle assembly for select John Deere lawn tractor and zero-turn mower deck applications.

Match your original spindle number before ordering. Optional pulley, blade, and belt references are listed separately below for buyers matching a complete deck repair path.

Key Features

• Aftermarket replacement-style mower deck spindle assembly
• Product Type: Spindle Assembly
• Lead Spindle Numbers: AM136733, AM137483
• Also Replaces: AM143469, AM134292, AM141110
• Additional Cross-References: M157769, M157736, M159146, Oregon 82-358
• Built around the spindle part-number path first to reduce fitment confusion

Compatible Brands & Model Series

This AM136733 / AM137483 spindle assembly is associated with select John Deere mower deck applications using the listed spindle replacement path.

Common John Deere model-series references include:

• S130 and S240 lawn tractor applications
• X300, X300R, X304, X305R, X310, X320, X324, X330, X340, X350, X350R, X354, X360, and X370 Select Series applications
• Z225, Z235, Z245, Z255, and Z355E EZtrak / ZTrak mower applications
• Common 42-inch and 48-inch deck paths where the original spindle number matches

Verify your part numbers before ordering.

Replaces OEM Part Numbers

• John Deere: AM136733, AM137483, AM143469, AM134292, AM141110
• Additional John Deere References: M157769, M157736, M159146
• Oregon: 82-358

Optional Parts Section

The following part numbers may appear in related pulley, blade, belt, or complete 48-inch deck kit paths. These parts are not included unless shown in the selected product image or package option.

• Optional Pulley Numbers: M155979, GX20335
• Optional Standard Blade Numbers: GX21784, AM137757, AM141035, GY20852, B1JD6017
• Optional Belt Number: M154621

Important Part Number Notes

• AM136733 and AM137483 are the clean lead spindle numbers for this listing.
• AM143469, AM134292, and AM141110 are related spindle replacement numbers in this path.
• M155979 and GX20335 are pulley references, not spindle numbers.
• GX21784, AM137757, AM141035, GY20852, and B1JD6017 are blade references, not spindle numbers.
• M154621 is a belt reference, not a spindle number.
• Do not order by deck size or mower model alone. Match the original spindle number before ordering.

Spindle Specifications

• Spindle Numbers: AM136733, AM137483, AM143469, AM134292
• Length Reference: 182.6 mm / 7.2 inches
• Width Reference: 127.8 mm / 5.0 inches
• Height Reference: 127.8 mm / 5.0 inches
• Alternate Supplier Height Reference: 169.4 mm / 6.66 inches depending on measurement point and package source
• Outer Diameter Reference: 126.2 mm / 4.96 inches

What’s Included

• Aftermarket replacement-style spindle assembly for the listed John Deere spindle path
• Pulleys, blades, belts, and complete deck kit components are only included when shown in the selected product image or package option
• Use the selected variant title and product image to confirm exact quantity and contents before checkout

Common Symptoms / When to Replace

• Mower deck spindle is noisy, loose, seized, or wobbling
• Blade has excessive play at the spindle shaft
• Deck vibration increases during blade engagement
• Spindle housing or bearing area is worn or damaged
• Original spindle number matches AM136733, AM137483, AM143469, or AM134292

Quick Ship Fulfillment

This item may ship directly from one of our trusted U.S. distribution partners to help reduce transit time. Packaging, labeling, or warehouse origin may vary, but the part will match the replacement numbers, fitment notes, and specifications shown in this listing.

Why Buy From PTO Direct USA

• Fitment-first product organization by spindle part-number path
• Optional pulley, blade, and belt references separated from the main spindle listing
• Clear John Deere X300, S-Series, and Z-Series replacement path
• U.S.-focused fulfillment options for faster delivery when available

Need a Custom Package?

Need a different combination of parts? Email us the part type and part numbers you need, such as spindle assemblies, blades, belts, pulleys, reinforcement rings, bearings, or hardware. We can review the part-number path and quote a custom package when available.

FAQ

Is this an OEM John Deere spindle assembly?

No. This is an aftermarket replacement-style spindle assembly intended to replace the listed part-number path when the physical fitment details match.

What are the lead spindle numbers for this listing?

The lead spindle numbers are AM136733 and AM137483. This listing also references AM143469, AM134292, and AM141110.

Are the pulley, blade, and belt included?

Not unless shown in the selected product image or package option. The pulley, blade, and belt numbers are listed as optional related parts for matching complete deck repair paths.

What pulley numbers are related to this spindle path?

Common optional pulley references include M155979 and GX20335.

What blade numbers are related to this spindle path?

Common optional blade references include GX21784, AM137757, AM141035, GY20852, and B1JD6017.

Can I order by mower model or deck size only?

No. Mower model and deck size alone are not enough. Match the original spindle number first, then confirm spindle dimensions, mounting pattern, blade mount, pulley setup, and belt routing before ordering.