Spindle Assembly 918-0659A / 918-0624A for MTD Lawn Tractor Mower Deck

Overview

This aftermarket 918-0659A spindle assembly with pulley and optional deck spindle reinforcement ring is a replacement-style mower deck spindle repair package for select MTD mower deck applications.

This listing is organized around the 918-0659A / 918-0624A spindle path. Supplier data also references related spindle assembly, pulley, shaft, bearing, and reinforcement ring components included in the package.

Key Features

• Aftermarket replacement-style mower deck spindle assembly with pulley
• Product Type: Spindle Assembly
• Lead Part Number: 918-0659A
• Also Replaces: 918-0624A, 918-0659, 918-0624, 618-0659A, 618-0659, 618-0624A, 618-0624, 618-0624B, 918-0624B
• Pulley Outer Diameter: 5.8 inches
• Organized by spindle or mandrel part number first to reduce fitment confusion

Compatible Brands & Model Series

Supplier listing data associates this spindle assembly package with select MTD mower deck applications.

Compatible model references found in supplier data include:

• LT 165
• LT 18
• LT 1800
• LT 1850
• LT 2150
• LT 4600H
• LT 546G
• LT 546H
• LT 946G
• LT 946H
• LTX 2146

Verify your part numbers before ordering.

Replaces OEM Part Numbers

• MTD: 618-0624, 618-0624A, 618-0624B, 618-0659, 618-0659A, 918-0624, 918-0624A, 918-0624B, 918-0659, 918-0659A

Aftermarket Cross-Reference Numbers

• Supplier cross-reference numbers: 82-515, 285-113, 285861, 1120311

Optional Package Part Number Breakdown

Part numbers below may apply to available package options. Not every package includes every component listed. Select the option that matches the parts needed for your repair.

• Spindle / Mandrel Numbers: 618-0624, 618-0624A, 618-0624B, 618-0659, 618-0659A, 918-0624, 918-0624A, 918-0624B, 918-0659, 918-0659A
• Spindle Pulley Number: 756-04216
• Shaft / Hardware Number: 738-1010A
• Bearing Number: 941-0919
• Repair Ring: Deck spindle reinforcement ring, no separate ring part number provided
• Blade Numbers: SPM214685078, 112-0315, 942-0616A, 98022, 335-807, 335-711, 490-110-M115, 742-04087, 7420616, 742-0616, 742-0616A, 742-0616A-0637, 942-04087, 942-0616, 942-0616A, GW-7420616
• Idler Pulley Numbers: 753-08068A, 753-08171, 756-04129, 756-04129B, 756-04129C, 956-04129, 956-04129C, 756-05042, 112-0314, 112-6277, 280-646
• Deck Belt Numbers: 112-5800, 754-04045, 954-04045, 265-195

Specifications

• Spindle Length: 173 mm / 6.8 inches
• Pulley Width: 147.8 mm / 5.8 inches
• Pulley Outer Diameter: 147.8 mm / 5.8 inches
• Repair Ring Length: 168 mm / 6.6 inches
• Repair Ring Width: 168 mm / 6.6 inches
• Repair Ring Height: 5 mm / 0.2 inch

Installation Note

Supplier data notes that the mounting holes are not threaded. A power tool may be needed to install the bolts. This design is intended to withstand mower deck vibration after proper installation.

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
• Pulley is worn, damaged, or no longer tracking the belt correctly
• Original spindle number matches one of the listed 918, 618, or related replacement numbers

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 replacement part-number path
• Clear spindle, pulley, bearing, and repair ring references to help reduce ordering errors
• U.S.-focused fulfillment options for faster delivery when available

Need Help Confirming Fitment?

Send us your mower model number, deck size, and the part number stamped on your original spindle or mandrel assembly. We can help confirm whether this is the correct replacement path.

FAQ

Is this an OEM MTD 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 is the lead part number for this listing?

The lead spindle part number is 918-0659A. Supplier data also references related 918, 618, pulley, shaft, and bearing numbers in the same spindle package path.

Does this include the reinforcement rings?

Supplier listing data describes this package as including spindle assemblies with pulleys and deck spindle reinforcement rings. Verify the selected product option and image before checkout.

Can I order by deck size only?

No. Deck size alone is not enough. Match the original spindle or mandrel number and confirm your mower model, deck setup, pulley layout, and mounting pattern before ordering.