1686881SM High-Torque PTO Clutch for Simplicity Legacy and AGCO Tractors
This HD Switch electric PTO clutch is an aftermarket replacement for select Simplicity, AGCO and Massey Ferguson garden tractors originally equipped with the 1686881SM electric clutch kit.
HD Switch rates this high-torque clutch at 175 ft-lb, compared with the 150 ft-lb reference rating shown for the original clutch class. The design combines a machined solid-steel pulley, replaceable wire harness and increased thermal capacity for demanding mower-deck applications.
This product is sold and fulfilled by an independent eBay seller. Current pricing, availability, shipping, returns and order support are handled through eBay.
Key Features
- Aftermarket replacement for Simplicity 1686881SM
- Seller-rated 175 ft-lb torque capacity
- Machined solid-steel double-groove pulley
- Replaceable electrical wire harness
- High-speed C3 clearance design intended to accommodate thermal expansion
- Composite coil design intended to reduce operating temperature
- Designed for demanding garden-tractor mower decks
Specifications
- Clutch type: Electric PTO clutch
- Crankshaft bore: 1-1/8 inch
- Pulley diameter: Approximately 4.7 inches
-
Pulley configuration: Double groove
- Torque rating: 175 ft-lb, as rated by HD Switch
- Electrical connection: Replaceable wire harness
Replaces OEM Part Numbers
- Simplicity 1686881SM
- Common abbreviated search reference: 1686881
Compatible Brands and Model Series
The 1686881SM clutch path appears in select configurations from the following equipment families:
- Simplicity Legacy garden tractors
- AGCO 2000 Series: 2020, 2025, 2020LC, 2024D and 2023H
- Massey Ferguson 2900 Series: 2920, 2925, 2920LC, 2924D and 2923H
These model families were produced in numerous engine, deck and manufacturing-number configurations. Compatibility must be confirmed through the original equipment parts diagram or the number on the existing clutch.
Important Fitment Check
Do not order this clutch by appearance or tractor series alone. Begin by confirming that 1686881SM is specified for your exact tractor model and manufacturing number.
Common Symptoms of PTO Clutch Failure
- Mower blades do not engage
- Clutch clicks but does not drive the deck belt
- Blades disengage after the clutch becomes hot
- Clutch slips or produces excessive heat
- Bearing noise, vibration or pulley wobble
- Damaged coil wiring or intermittent electrical operation
Electrical switches, connectors, charging-system voltage, wiring and safety-interlock circuits should also be tested before replacing the clutch.
What Is Included
- One HD Switch high-torque electric PTO clutch
- Replaceable wire harness as shown in the seller photographs
Installation hardware, crankshaft bolt, washers, spacers and anti-rotation hardware are not assumed to be included unless specifically shown or stated by the eBay seller.
Why Consider This High-Torque Clutch?
Clutch slippage creates heat and can accelerate wear to the friction surfaces, coil and bearings. HD Switch markets this 175 ft-lb design as a higher-capacity alternative to the 150 ft-lb original clutch class. The solid-steel pulley and replaceable harness also provide practical service advantages over lighter formed-pulley designs.
Third-Party Purchase Notice
This clutch is offered as an affiliate product and is not stocked or shipped by PTO Direct USA. The eBay seller is the seller of record and handles payment, fulfillment, shipping, returns, warranty coverage and order-related support. Review the complete eBay listing and seller terms before purchasing.
Need Help Confirming Fitment?
Contact PTO Direct USA before ordering if you are uncertain. Text or email a clear photograph of your tractor identification tag and the label or stamped number on the original clutch. We can help compare the part-number path and physical configuration.
You can also review our PTO Clutch Fitment Guide to see where mower model information and clutch identification numbers are commonly located.
Frequently Asked Questions
Is this a genuine Simplicity clutch?
No. This is an aftermarket HD Switch clutch designed to replace equipment using OEM reference number 1686881SM.
Will it fit every Simplicity Legacy tractor?
No. Legacy tractors were manufactured in several configurations. Confirm 1686881SM through the parts diagram for your exact manufacturing number and compare the physical specifications before purchasing.
What does the 175 ft-lb rating mean?
HD Switch rates this clutch for 175 ft-lb of torque capacity and markets it as a higher-capacity alternative to the 150 ft-lb original clutch class. This is the seller’s stated product rating.
Does it have a replaceable wiring harness?
Yes. The product photographs identify a replaceable wire-harness connection on the clutch assembly.
Who handles shipping and returns?
The eBay seller handles fulfillment, shipping, returns, warranty questions and order support. Current terms are displayed on the eBay product page.