44-0770 / 54-0220 PTO Clutch for Toro & Lawn-Boy | 1" Internal Keyway | X0491A

Overview

This 44-0770 / 54-0220 electric PTO clutch replacement is an aftermarket clutch for select older Toro and Lawn-Boy mower applications using the 44-0770 / 54-0220 clutch path.

This clutch uses a 1-inch bore with an internal machined keyway in the clutch hub, an approximately 5-5/16-inch pulley, and CCW rotation from the pulley side. It is associated with the Ogura MA-GT-TRO / MA-GT-TROC family and Xtreme X0491 / X0491A replacement path.

Critical keyway warning: Similar-looking PTO clutches exist with different key and hub arrangements. This listing is specifically for the clutch configuration with the internal keyway machined into the 1-inch clutch bore. Match your original part number and inspect the bore/key arrangement before ordering.

Key Features

• Aftermarket electric PTO clutch assembly
• Primary Toro / Lawn-Boy Numbers: 44-0770, 54-0220
• Xtreme Cross-Reference: X0491, X0491A
• Crankshaft Bore: 1 inch
• Keyway Configuration: internal machined keyway in clutch bore
• Pulley Diameter: approximately 5.313 inch / 5-5/16 inch
• Rotation: CCW from pulley side
• Belt Compatibility: 1/2-inch or 5/8-inch V-belt path on supported applications
• Connector: wire lead and connector configuration as shown in product photos
• Integrated electric clutch and brake assembly
• Fully assembled and ready to install after fitment verification

Compatible Brands & Model Series

This is a part-number-first replacement for Toro and Lawn-Boy equipment using the 44-0770 / 54-0220 clutch path.

Toro Applications

Published Xtreme application data includes select:

• Toro 11-32, 11-38, 11-42 and 11-44 lawn tractors
• Toro 12-32 lawn tractor
• Toro Groundsmaster 117 and 120
• Toro ProLine Series 120
• Toro Pro Lawn Tractor / Front Engine Rider applications

Published Toro model numbers include:

• 30544, 30610, 30611
• 57365, 57400, 57410
• 57420, 57430, 59147
• 30108, 30111, 30136
• 30718, 30612TE, 30612
• 30754, 30768, 57450
• 57300, 30152, 57354
• 57356, 57357, 57360

Lawn-Boy Applications

Use this listing for select Lawn-Boy applications whose original clutch is marked 44-0770 or 54-0220. Match the original clutch number and physical keyway configuration before ordering.

Replaces OEM Part Numbers

• Toro: 44-0770, 54-0220
• Lawn-Boy: 44-0770, 54-0220

Aftermarket & Manufacturer Cross-Reference Numbers

• Ogura: MA-GT-TRO, MAGTTRO
• Ogura: MA-GT-TROC, MAGTTROC
• Xtreme: X0491, X0491A

Common Symptoms of a Failing PTO Clutch

• Blades will not engage when the PTO switch is activated
• PTO clutch clicks but the deck belt does not turn
• Blades engage when cold and stop after the mower heats up
• Intermittent blade engagement under load
• Deck belt slips, squeals, or smokes during engagement
• Burning smell or excessive heat near the clutch
• Grinding, bearing noise, or vibration from the clutch area

What’s Included

• 1 complete aftermarket electric PTO clutch assembly
• Approximately 5-5/16-inch pulley
• 1-inch clutch bore with internal machined keyway
• Pre-installed bearing assembly
• Encapsulated electromagnetic coil
• Integrated brake assembly
• Wire lead and connector as shown in product photos

Why Buy From PTO Direct USA?

• Fast USA shipping
• Fitment guarantee
• 1-year warranty
• Fitment-first product descriptions
• Clear keyway and part-number identification
• Product photos that show the actual clutch configuration
• Support for older and difficult-to-identify PTO clutch applications

Need Help Confirming Fitment?

Email support@ptodirectusa.com with your mower model number, original clutch number, and clear photos of the clutch bore, crankshaft/key, pulley, connector, and anti-rotation setup.

FAQ

What PTO clutch replaces Toro 44-0770?

This clutch is offered for select Toro applications using the 44-0770 clutch path. Xtreme catalogs 44-0770 with its X0491 / X0491A replacement family.

What PTO clutch replaces Toro 54-0220?

This clutch is offered for select Toro applications using 54-0220. Match the original clutch number and internal-keyway configuration before ordering.

Are Lawn-Boy 44-0770 and 54-0220 part of this same clutch path?

Yes. Published replacement data associates both Lawn-Boy 44-0770 and 54-0220 with this X0491 clutch family.

What is the keyway configuration?

This clutch uses a 1-inch bore with an internal machined keyway in the clutch hub. Confirm that the original installation uses the matching crankshaft and separate drive-key arrangement.

What pulley diameter does this clutch use?

The published replacement specification is approximately 5.313 inches / 5-5/16 inches.

What direction does this clutch rotate?

This clutch uses CCW rotation from the pulley side.

Does this fit Toro Groundsmaster 117 or 120?

The Xtreme X0491 application catalog includes select Toro Groundsmaster 117 and 120 applications. Confirm the original clutch number and physical configuration before ordering.

Is this related to Ogura MA-GT-JD2?

Yes. Current replacement data places MA-GT-JD2, MA-GT-TRO, MA-GT-TROC, 44-0770, and 54-0220 within the same X0491 replacement family. If your original clutch is specifically marked MA-GT-JD2, see the dedicated MA-GT-JD2 PTO clutch listing.

Can I order this clutch by appearance alone?

No. Pay particular attention to the internal clutch-bore keyway. Similar-looking PTO clutches with a different key or hub arrangement should not be substituted simply because the bore and pulley dimensions look close.

Need installation help? Read the PTO Clutch Installation Guide.

Need a different Toro clutch? Browse the Toro PTO clutch collection or the full electric PTO clutch catalog.