Spindle Assembly 918-05137 / 618-05137 for Cub Cadet RZT-L54 Troy-Bilt Mustang XP 54-Inch Deck

Overview

This aftermarket 918-05137 spindle assembly is a replacement-style mower deck spindle assembly for select Cub Cadet, MTD, and Troy-Bilt 54-inch zero-turn mower deck applications.

This listing is organized around the 918-05137 / 618-05137 spindle path. Some package options may include additional deck repair components such as blades, idler pulleys, bolts, and a deck belt, but the lead replacement path is the spindle assembly.

Key Features

• Aftermarket replacement-style mower deck spindle assembly
• Product Type: Spindle Assembly
• Lead Part Number: 918-05137
• Also Replaces: 618-05137
• Common Deck Reference: 54 inch
• Optional package variants may include spindle assemblies, blades, idler pulleys, bolts, and deck belt components
• Organized by spindle or mandrel part number first to reduce fitment confusion

Compatible Brands & Model Series

Supplier listing data associates the 918-05137 spindle assembly with select 54-inch Cub Cadet RZT and Troy-Bilt Mustang XP zero-turn mower applications.

Cub Cadet model references found in supplier data include:

• RZT-L54 KH, 54-inch deck, Kohler, model references 17AFCACK009, 17AFCACK010, 17AFCACK056, 17AFCACK209, 17AFCACK210, 17WFCACK009, 17WFCACK010, 17WFCACK056, and 17WFCACK209, 2013
• RZT-L54 KW, 54-inch deck, Kawasaki, model references 17AICACK010 and 17WICACK010, 2013
• RZT-S54, 54-inch deck, model references 17AFCBDK010 and 17WFCBDK010, 2013

MTD / Troy-Bilt model references found in supplier data include:

• Troy-Bilt Mustang XP 54-inch zero-turn mower, model 17ADCACK066, 2013
• Troy-Bilt Mustang XP 54-inch zero-turn mower, model 17BDCACK066, 2014

Verify your part numbers before ordering.

Replaces OEM Part Numbers

• Cub Cadet / MTD / Troy-Bilt: 918-05137, 618-05137

Aftermarket Cross-Reference Numbers

• Supplier cross-reference numbers: 285-157, 119-8445

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 variant package that matches the parts needed for your repair.

• Spindle / Mandrel Numbers: 918-05137, 618-05137
• Aftermarket Spindle Cross-Reference: 285-157
• Blade Numbers: 742-0677, 742-0677A, 742-0677B, 942-0677, 942-0677A, 942-0677B, OCC-742-0677, 490-110-M117, 112-0931, 98024, 335-855
• Idler Pulley Numbers: 753-08068A, 753-08171, 756-04129, 756-04129B, 756-04129C, 956-04129, 956-04129C
• Deck Belt Numbers: 754-04329, 754-04329A, 954-04329, 954-04329A, 265-202

Single Spindle Specifications

• Spindle Part Number: 918-05137
• Also Replaces: 618-05137
• Deck Size Reference: 54 inch
• Height: 171.8 mm / 6.76 inches
• Mounting Hole Distance: 90 mm / 3.54 inches
• Material: Aluminum

Optional Package Component Specifications

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

• Deck Blade Length: 466.7 mm / 18.3 inches
• Deck Blade Width: 79.3 mm / 3.1 inches
• Deck Blade Thickness: 4.2 mm / 0.165 inch
• Deck Blade Inner Diameter: 25.6 mm / 1 inch
• Deck Blade Center Hole: 6-point star
• Idler Pulley Width: 26.4 mm / 1.03 inches
• Idler Pulley Inner Diameter: 9.6 mm / 0.37 inch
• Idler Pulley Outer Diameter: 123.8 mm / 4.87 inches
• Deck Belt Width: 15.87 mm / 0.62 inch
• Deck Belt Overall Length: 3760 mm / 148 inches

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 or belt system is worn, noisy, or no longer tracking correctly
• Original spindle number matches 918-05137 or 618-05137

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, pulley, and belt 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 918-05137. Supplier data also references 618-05137 and aftermarket cross-reference 285-157.

Do all package options include blades, idler pulleys, and a belt?

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 deck 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 belt path before ordering.