How to Identify, Cross-Reference, and Replace Ogura PTO Clutches

Ogura PTO clutches are commonly factory-installed on many residential and commercial lawn mowers, including applications from John Deere, Husqvarna / AYP, Craftsman, Gravely, and other major mower platforms. While these clutches are well-engineered, replacing one can quickly become confusing due to inconsistent diagrams, outdated cross-reference charts, and part numbers that don’t always match what’s stamped on the clutch itself.

This guide breaks the process down clearly—showing you how to identify your Ogura PTO clutch, cross-reference it correctly, and select a compatible aftermarket replacement from Ox Clutch without guessing.

Why Ogura PTO Clutches Are So Common

Ogura is one of the primary OEM suppliers of electric PTO clutches, which is why their GT and MA series clutches appear across so many mower brands and models. The challenge usually isn’t performance—it’s replacement.

When it’s time to replace an Ogura PTO clutch, mower owners and repair shops often run into:

• OEM replacement pricing that’s unnecessarily high
• Diagrams listing part numbers that don’t match the clutch on the machine
• Cross-reference charts that skip certain GT or MA series variants
• Confusion caused by clockwise (CW) vs counter-clockwise (CCW) rotation differences

Ox Clutch solves this by offering aftermarket PTO clutch replacements engineered to match Ogura factory-installed specifications, without forcing you into OEM pricing or incomplete information.

Step 1: Identify Your Ogura PTO Clutch Part Number

The Ogura part number is the most reliable way to identify your clutch.

You’ll usually find it in one of the following places:

• A label or decal on the clutch housing
• A stamped or etched marking on the metal body

Common Ogura formats include:

• GT1A-MT09
• MA-GT-JD11
• Other GT or MA series identifiers

If the Label Is Missing

If the sticker is worn or missing, the clutch can still be identified using physical specifications:

• Crankshaft bore (inside diameter)
• Pulley diameter
• Rotation direction
• CW: pulley faces toward the engine
• CCW: pulley faces away from the engine
• Overall clutch height (especially critical for CCW applications where belt alignment matters)

👉 Need confirmation? Submit your measurements and photos through the Clutch Request Form, and our team will help you identify the correct replacement.

Step 2: Use the Ox Clutch Part Number Search

Once you have the Ogura number, enter it directly into the Ox Clutch search bar.

You’ll see listings such as:

“Replacement for Ogura GT1A-MT09 PTO Clutch”

Each product page clearly lists:

• ID (bore size)
• Pulley diameter
• Rotation

🔎 Browse all options:
View Ogura Replacement PTO Clutches

Ogura PTO Clutch Cross-Reference Examples

Enter your part number into the search bar above, if your exact number isn’t listed or you are unsure if it is the right match you can submit it through the Clutch Request Form for verification.

Why Choose an Ox Clutch Replacement?

Ox Clutch specializes exclusively in PTO clutches. Our aftermarket replacements are designed to meet Ogura fitment and performance standards—without the OEM markup.

Key benefits include:

• Precision-engineered fitment
• High torque capacity for consistent engagement
• Cooler-running coil and bearing design
• Corrosion-resistant finishes
• 1-Year Warranty + Lifetime Discount Program
• Installation, troubleshooting, and diagnostic resources

📖Related resources:

• Warner Replacement PTO Clutch Cross Reference Simplified
• PTO Clutch Maintenance & Care Tips

When It’s Time to Replace an Ogura PTO Clutch

A failing PTO clutch often shows clear warning signs. Replace your clutch if you notice:

• Slipping under load
• Overheating
• Weak or no engagement
• Burning smell
• Bearing noise or wobble
• Electrical coil failure

📖Related resources:

• PTO Clutch Basics: How it Works, Adjusts, and When to Replace
• How to Identify a Failing PTO Clutch

Installing a properly matched Ox Clutch replacement restores reliable engagement and helps protect belts, pulleys, and the mower driveline from secondary damage.

🔍 Find your replacement:
Browse All Collections of PTO Clutch Replacements

📝 Need help identifying your clutch?
Submit a Clutch Request Form

Key Takeaways: Ogura PTO Clutch Cross Reference & Replacement

• Ogura PTO clutches are widely used as factory-installed components on many residential and commercial lawn mowers.
• Identifying the correct Ogura PTO clutch starts with the part number stamped or labeled on the clutch body.
• When the label is missing, proper cross-referencing depends on ID (bore size), pulley diameter, rotation direction, and overall clutch height.
• Ox Clutch provides aftermarket PTO clutch replacements engineered to match Ogura factory-installed fitment and performance standards.
• Replacing a failing PTO clutch restores reliable engagement and helps prevent secondary damage to belts, pulleys, and mower driveline components.

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