Spindle Assembly 918-06989 / 618-06989 for MTD, Cub Cadet, Yard-man 46-Inch Deck

Overview

This aftermarket 918-06989 spindle assembly is a replacement-style mower deck spindle assembly for select MTD-built 46-inch lawn tractor decks, including Troy-Bilt, Craftsman, Yard-Man, Yard Machines, Columbia, Huskee, Remington, and related MTD-family applications.

This listing is organized around the 918-06989 / 618-06989 spindle path. Some package options may include additional deck repair components such as blades and flange nuts, but the lead replacement path is the spindle assembly.

Verify your part numbers before ordering.

Key Features

• Aftermarket replacement-style mower deck spindle assembly
• Product Type: Spindle Assembly
• Lead Part Number: 918-06989
• Also Replaces: 618-06989
• Common Deck Reference: 46 inch
• Thread Size: 5/8-18
• Optional package variants may include spindle assemblies, blades, and flange nuts
• Organized by spindle or mandrel part number first to reduce fitment confusion

Compatible Brands & Model Series

Supplier listing data associates the 918-06989 spindle assembly with select 46-inch MTD-built mower deck applications.

Troy-Bilt model references found in supplier data include:

• Bronco 46-inch lawn tractor models, including 13A878BT066, 13AJ78BT066, 13AL78BT066, 13AO78BT066, and 13AT78BT066 references
• Horse and Horse XP lawn tractor models, including 13AK79BT011, 13AK79BT211, 13AX79BT011, 13AX79BT066, 13CX79KT011, 13WX79BT011, 13WX79BT211, 13YX79KT011, and 13YX79KT211 references
• TB547/46 and TB 46 model references in supplier data

Craftsman model references found in supplier data include:

• Craftsman T135, T140, T150, T1500, T1600, T1700, T1900, T2600, and T2700 lawn tractor references
• Common model-code paths include 247.203740, 247.203743, 247.203744, 247.203750, 247.203753, 247.203754, 247.203791, 247.255860, 247.255880, 247.255890, 247.273410, 247.273430, 247.273720, and 247.273740

Additional MTD-family references found in supplier data include:

• Yard-Man 13AN785T055 lawn tractor
• Remington 13AX79WT083 lawn tractor
• Huskee LT 4600, model reference 13W878ST031
• Columbia CLT 46 CVT, including 13A878KT897 and 13B878KT897 references
• Yard Machines 679/46, including 13AJ77KT345 and 13BJ77KT345 references

Supplier data includes multiple model-code and year references. Verify your original spindle number, mower model, deck configuration, and OEM diagram before ordering.

Replaces OEM Part Numbers

• MTD / Troy-Bilt / Craftsman / Yard-Man / Yard Machines / Columbia: 918-06989, 618-06989, 490-130-Y025

Aftermarket Cross-Reference Numbers

• Aftermarket spindle reference: 285-209

Optional Package Part Number Breakdown

Supplier listing data references the following part numbers across available package options. Not every package includes every component listed below. Select the package option that matches the parts needed for your repair.

• Spindle / Mandrel Numbers: 918-06989, 618-06989, 490-130-Y025
• Aftermarket Spindle Cross-Reference: 285-209
• Blade Numbers: 490-110-C131, 754-04244, OCC-742-04244, 742-04244, 742-04244A, 742-04290, 742-04290A, 942-04244, 942-04244A, 942-04290, 942-04290A, 335-757
• Flange Nut / Reinforcement Hardware Numbers: 712-0417A, 753-05549, 712-0417, 712-0417AP, 912-0417A, 112-0330, 285-118

Single Spindle Specifications

• Spindle Part Number: 918-06989
• Also Replaces: 618-06989
• Deck Size Reference: 46 inch
• Height: 172 mm / 6.77 inches
• Outer Diameter: 134.4 mm / 5.29 inches
• Mounting Hole Distance: 160.7 mm / 6.32 inches
• Pulley Width: 13.5 mm / 0.53 inch
• Thread Size: 5/8-18
• Material: Aluminum

Optional Package Component Specifications

The following specifications were found in supplier data for optional package variants that include additional deck repair components.

• Blade Length: 590.5 mm / 23-1/4 inches
• Blade Width: 76.2 mm / 3 inches
• Blade Thickness: 4.16 mm / 0.164 inch
• Blade Mounting Hole Distance: 76.2 mm / 3 inches
• Blade Center Hole: 6-point star
• Blade Hole Diameter: 28.5 mm / 1.12 inches
• Blade Material: Steel
• Blade Style: High lift
• Flange Nut Width: 13.9 mm / 0.54 inch
• Flange Nut Inner Diameter: 14.5 mm / 0.57 inch
• Flange Nut Outer Diameter: 36.6 mm / 1.43 inches
• Flange Nut Material: Iron

Need the Complete 46-Inch Deck Kit?

This listing is for the 918-06989 / 618-06989 spindle assembly path. If your Troy-Bilt, Craftsman, MTD, Yard-Man, Columbia, Huskee, or related 46-inch deck also needs blades and a deck belt, see the 46-inch deck rebuild kit for Troy-Bilt Bronco, Horse, and TB46 mowers.

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 918-06989, 618-06989, or 490-130-Y025

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, blade, and hardware references for package variants
• 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 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 918-06989. Supplier data also references 618-06989 and 490-130-Y025 in the same spindle path.

Do all package options include blades and flange nuts?

No. Package contents vary by selected option. Use the variant title and product images to confirm whether you are ordering a single spindle assembly or a larger repair package.

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, mounting pattern, and blade path before ordering.