GY20878 PTO Clutch Replacement for John Deere D140, L120, LA145 | Replaces GY20108, Warner 5219-20

Overview

This GY20878 PTO clutch replacement is an aftermarket electric PTO clutch for select John Deere, Scotts, and SABO lawn tractor applications.

This clutch replaces John Deere GY20878, GY20108, GY21340, and GY20652, and cross-references Warner 5219-20, Warner 5219-73, Xtreme X0424, and Stens 255-001X.

Built with a 1-inch crankshaft bore, 6.10 inch pulley diameter, and counter-clockwise rotation, this clutch is designed to restore reliable mower deck blade engagement when matched to the correct model, original clutch number, crankshaft size, pulley size, rotation, connector style, and physical specs.

Key Features

• Aftermarket electric PTO clutch replacement for listed John Deere, Scotts, and SABO applications
• Crankshaft Bore: 1"
• Pulley Diameter: 6.10"
• Rotation: CCW from pulley side
• Voltage: 12V DC
• Operating Speed: up to 3600 RPM
• Encapsulated electromagnetic coil for consistent engagement
• High-temperature bearing assembly
• Fully assembled and ready to install

Compatible Brands & Models

This PTO clutch fits select John Deere, Scotts, and SABO lawn tractor applications that use the GY20878, GY20108, GY21340, GY20652, Warner 5219-20, or Warner 5219-73 clutch path.

John Deere D-Series Applications

• John Deere D140
• John Deere D150
• John Deere D155
• John Deere D160
• John Deere D170

John Deere E-Series Applications

• John Deere E140
• John Deere E150
• John Deere E160
• John Deere E170
• John Deere E180

John Deere L / LA-Series Applications

• John Deere L120
• John Deere L130
• John Deere LA130
• John Deere LA140
• John Deere LA145
• John Deere LA150
• John Deere LA155
• John Deere LA165
• John Deere LA175

John Deere LA145 fitment help: Replacing the PTO clutch on an LA145? Read the John Deere LA145 PTO clutch replacement guide for GY20878 supersession notes, Warner 5219 cross references, related models, and fitment checks before ordering.

Additional Applications

• John Deere G110
• Scotts L2048
• Scotts L2548
• SABO 92H lawn tractors

Fitment note: If your original clutch is marked GY20878, GY20108, GY21340, GY20652, Warner 5219-20, Warner 5219-73, Xtreme X0424, or Stens 255-001X, this is the correct replacement path. However, carefully match specs if relying on model information alone.

Replaces OEM Part Numbers

• John Deere: GY20878
• John Deere: GY20108
• John Deere: GY21340
• John Deere: GY20652

Cross-Reference Aftermarket Numbers

• Warner: 5219-20, 521920
• Warner: 5219-73, 521973
• Xtreme: X0424
• Stens: 255-001X, 255001X

What’s Included

• Complete electric PTO clutch assembly
• Factory-balanced 6.10" pulley
• Pre-installed bearing assembly
• Encapsulated electromagnetic coil
• Connector as shown in product photos

Why Buy From PTO Direct USA?

• Fast USA shipping
• Fitment guarantee
• 1-year warranty
• Fitment-first product support
• Clear product images for easier clutch identification
• Trusted replacement supplier for homeowners, repair shops, and mower service professionals

FAQ

Does GY20878 fit John Deere D140, D150, D160, and D170 tractors?

Yes, this clutch is listed for select John Deere D140, D150, D155, D160, and D170 lawn tractor applications using the GY20878 clutch path. Confirm your original clutch number and physical specs before ordering.

Does GY20878 fit John Deere E140, E150, E160, E170, and E180 tractors?

Yes, this clutch is listed for select John Deere E140, E150, E160, E170, and E180 applications. Match the original clutch number, 1-inch bore, pulley diameter, rotation, and connector style before ordering.

Does this clutch fit John Deere L120 and L130?

Yes, this clutch is listed for select John Deere L120 and L130 lawn tractor applications using the GY20878 / GY20108 clutch path.

Does this clutch fit John Deere LA145 or LA175?

Yes, this clutch is listed for select John Deere LA145, LA150, LA155, LA165, and LA175 applications. Confirm the original clutch number before ordering. For LA145-specific details, see the John Deere LA145 PTO clutch replacement guide.

Is Warner 5219-20 the same fitment as GY20878?

Warner 5219-20 is the Warner cross-reference commonly associated with the GY20878 clutch path.

Is Warner 5219-73 the same fitment as GY20878?

Warner 5219-73 is also commonly listed in the GY20878 clutch family. Match the original clutch number and physical specs before ordering.

Is Xtreme X0424 the same fitment?

Xtreme X0424 is an aftermarket cross-reference for the GY20878 / Warner 5219-20 PTO clutch family.

What bore size does GY20878 use?

This clutch uses a 1-inch bore. Confirm your crankshaft size before ordering.

What pulley diameter does this clutch use?

This clutch is commonly listed with a 6.10 inch pulley diameter. Confirm against your original clutch and product photos before ordering.

What rotation does this clutch use?

This clutch uses counter-clockwise rotation, commonly written as CCW. Match rotation to your original clutch before installing a replacement.

What are common signs of a failing PTO clutch?

Common symptoms include mower blades not engaging, the PTO clutch clicking but the blades not spinning, slipping under load, intermittent blade engagement, a burning smell, or blades slowing down after the mower heats up. A worn coil can work cold, then weaken after 10 to 30 minutes of mowing.

Can PTO Direct USA help me confirm fitment?

Yes. Email support@ptodirectusa.com with your mower model number, serial number, deck size, original clutch number, and clear photos of the old clutch. For the best fitment help, include photos of the clutch label or stamped number, wiring connector, pulley, anti-rotation bracket, and crankshaft area.

Need help checking crankshaft size? Read the 1-inch vs 1-1/8 inch PTO clutch bore guide.

Need help with rotation? Read the PTO clutch rotation guide.

Need help comparing Warner numbers? Read the Warner 5219 PTO clutch cross-reference guide.

Need installation help? Read the PTO clutch installation guide.

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