100-6059 PTO Clutch for Toro & Exmark | Replaced by 110-6766

The 100-6059 PTO clutch is part of a Toro and Exmark OEM clutch group that includes 103-9950 and 108-9510. These part numbers refer to the same clutch platform used across multiple zero-turn mower applications.

This OEM clutch group directly cross-references to the 110-6766 PTO clutch, which serves as the primary aftermarket replacement.

If your original PTO clutch is stamped with 100-6059, 103-9950, 108-9510, or 110-6766, the correct replacement is the 110-6766 PTO clutch.

Confirm full cross-reference compatibility, including the complete OEM part number cluster and supported mower models, in the 110-6766 PTO clutch fitment guide.

Related Part Numbers

The following part numbers belong to the same PTO clutch cross-reference group and use the same replacement:

  • Toro / Exmark: 100-6059, 103-9950, 108-9510, 110-6766
  • Warner: 5219-81, 5219-45, 5219-34A, 5219-58, 5219-63, 5219-66
  • Replacement: 110-6766 PTO clutch

Compatible Toro Models

This clutch group is commonly associated with Toro TimeCutter and Titan zero-turn mower platforms.

TimeCutter SS Series

TimeCutter Z Series

Toro Titan Series

For broader coverage, see the Toro PTO clutch replacement guide.

Compatible Exmark Models

This clutch group also applies to select Exmark zero-turn mower platforms that share the same PTO clutch configuration.

Common Signs of a Failing 100-6059 PTO Clutch

  • Blades will not engage when the PTO switch is activated
  • Intermittent blade engagement or slipping
  • Burning smell or excessive heat from the clutch area
  • Squealing or grinding from worn bearings
  • Blades stop under load in thicker grass
  • Visible wear or heat damage on the clutch housing or pulley

If your mower shows these symptoms, replacing the PTO clutch restores proper blade engagement and cutting performance.

How to Confirm Fitment

The most reliable way to confirm compatibility is to match the OEM part number stamped on your original PTO clutch.

If your clutch is marked 100-6059, 103-9950, 108-9510, or 110-6766, this replacement group is the correct place to start.

If the OEM number is unreadable, use your mower model with the fitment guides above, or contact us for fitment assistance.

Shop 100-6059 PTO Clutch Replacement

If your clutch matches 100-6059, 103-9950, or 108-9510, the correct replacement is the:

110-6766 PTO Clutch Replacement

You can also browse the full Toro PTO clutch collection or view all electric PTO clutches.