Spindle Assembly 139-3214 / 121-0751 for Toro Exmark TimeCutter

Overview

This aftermarket 139-3214 / 121-0751 spindle assembly is a replacement-style mower deck spindle assembly for select Toro TimeCutter and Exmark Quest mower deck applications.

This listing is organized around the 139-3214 spindle path. Optional package choices may include a spindle pulley or mower blade depending on the selected option. Match your original spindle number, pulley number, blade number, and mounting pattern ordering.

Key Features

• Aftermarket replacement-style mower deck spindle assembly
• Product Type: Spindle Assembly
• Lead Part Numbers: 139-3214, 121-0751
• Also Replaces: 117-7439, 120-6234, 121-9107, 117-7267, 117-0751
• Related Spindle Shaft Reference: 117-7268
• Common Deck References: 42 inch and 50 inch
• Optional package variants may include spindle pulley or mower blade components
• Organized by spindle, pulley, and blade part type to reduce fitment confusion

Compatible Brands & Model Series

This 139-3214 / 121-0751 spindle assembly is used on select Toro TimeCutter and Exmark Quest mower deck applications.

Common model-series references include:

• Toro TimeCutter SS, SW, SWX, MX, ZS, and ZR 42-inch deck references
• Toro TimeCutter SS, SW, SWX, MX, and ZS 50-inch deck references
• Toro TimeCutter 4200, 4216, 4225, 4235, 4250, and 4260 deck paths
• Toro TimeCutter 5000, 5035, 5050, and 5060 deck paths
• Exmark Quest E-Series and S-Series mower deck applications using the listed spindle path

Verify your part numbers before ordering.

Replaces OEM Part Numbers

• Toro / Exmark Spindle Assembly Numbers: 139-3214, 121-0751, 117-7439, 120-6234, 121-9107, 117-7267, 117-0751
• Alternate No-Dash References: 1393214, 1210751, 1177439, 1206234, 1219107, 1177267, 1170751
• Related Spindle Shaft Reference: 117-7268, 1177268

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: 139-3214, 121-0751, 117-7439, 120-6234, 121-9107, 117-7267, 117-0751
• Related Spindle Shaft Reference: 117-7268
• Spindle Pulley Numbers: 139-2433, 110-6864, 125-5574
• Alternate Pulley References: 1392433, 1106864, 1255574
• Blade Numbers: 106-2247-03, 106-6583-03, 106-8744-03, 110-6568-03, 106-2247, 11821

Important Part Number Notes

• 139-3214 is the clean lead spindle assembly number for this listing.
• 121-0751 is an older spindle assembly number commonly superseded to 139-3214.
• 117-7268 may appear as a spindle shaft reference in diagrams and aftermarket data. Match your original parts diagram before treating it as a complete spindle assembly number.
• 139-2433, 110-6864, and 125-5574 are pulley numbers and should not be listed as spindle assembly numbers.
• 106-2247-03, 106-6583-03, 106-8744-03, and 110-6568-03 are blade numbers and should stay in the blade bucket.

Single Spindle Specifications

• Spindle Part Number: 139-3214
• Also Replaces: 121-0751, 117-7439, 120-6234, 121-9107, 117-7267, 117-0751
• Height Reference: 5-1/2 inches
• Outer Diameter Reference: 6-1/4 inches
• Deck Size References: 42 inch and 50 inch
• Application Note: Confirm spindle housing style, shaft setup, blade center, mounting pattern, pulley setup, and belt routing before ordering

Optional Package Component Specifications

Spindle Pulley Specifications

• Pulley Numbers: 139-2433, 110-6864, 125-5574
• Pulley Outer Diameter Reference: 5.47 inches to 5.57 inches depending on supplier measurement point
• Pulley Inner Diameter Reference: approximately 0.70 inch
• Pulley Height Reference: approximately 0.83 inch

Blade Specifications

• Blade Numbers: 106-2247-03, 106-6583-03, 106-8744-03, 110-6568-03, 106-2247, 11821
• Blade Length Reference: 21-5/8 inches for common 42-inch two-blade deck paths
• Center Hole Reference: 5/8 inch
• Deck Size Reference: 42 inch when used as a two-blade deck package

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 pulley is worn, damaged, bent, or no longer tracking the belt correctly
• Blade is bent, worn, dull, or no longer cutting evenly
• Original spindle number matches one of the listed Toro / Exmark 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 spindle part-number path
• Clear spindle, pulley, and blade references for package variants
• 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 Toro or Exmark spindle assembly?

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

What are the lead part numbers for this listing?

The lead spindle numbers are 139-3214 and 121-0751. This listing also references 117-7439, 120-6234, 121-9107, 117-7267, and 117-0751 in the same replacement path.

Is 117-7268 a complete spindle assembly number?

Some aftermarket data includes 117-7268 in this replacement path, but Toro diagrams may show it as a spindle shaft reference. Match your original diagram before treating it as a complete spindle assembly number.

Are 139-2433, 110-6864, and 125-5574 spindle numbers?

No. Those are spindle pulley numbers and should stay in the pulley bucket.

Are 106-2247-03 and 110-6568-03 spindle numbers?

No. Those are mower blade numbers and should stay in the blade bucket.

Do all options include the pulley and blade?

No. Package contents vary by selected option. Review the selected variant title and product images before checkout.

Can I order by deck size only?

No. Deck size alone is not enough. Match the original spindle number first, then confirm mower model, deck layout, pulley number, blade number, mounting pattern, and belt routing before ordering.