| Brand Name | SeaSummer | SKU | 0325-Jo-0001 |
| ID | 1.125" | Pulley | 6.3" |
| Rotation | CW | Belt | 1/2" or 5/8" Belt |
| Bolt Torque | 205 ft. lbs. | Maximum Engine RPM | 3,600 RPM |
| Voltage Insulation | 1000V | Temperature | Up to 370°F (188°C) |
| Net Weight | 5kg | Carton Dimensions | 68 x 46 x 26 cm |
| MOQ | 100pcs | Customized Services | OEM |
| Delivery Time | 30 days, volume-dependent | Packaging | Cardboard packaging |
Products Description
Lawn Mower Tractor PTO Clutch John Deere ZTrak 737 / 757 / 777 / 797
This heavy-duty electric PTO clutch is a premium aftermarket replacement tailor-made for John Deere ZTrak 737, 757, 777, and 797 zero-turn lawn mowers. As a core power transmission component, it precisely controls the connection and disconnection of power to the mower cutting deck, ensuring smooth, consistent blade operation during intensive lawn mowing tasks.Built with industrial-grade sealed bearings, a high-precision balanced pulley, and a fully waterproof pre-assembled wiring harness, this PTO clutch features plug-and-play installation with no complex modification required. The reinforced wear-resistant and anti-corrosion structure effectively resists grass debris, mud, moisture and high-temperature working environments of outdoor lawn operations. It perfectly solves common equipment failures including clutch slipping, delayed blade engagement, abnormal noise and insufficient power output, being a durable and cost-effective replacement part for personal maintenance and professional lawn equipment repair.
Vehicle Compatibility
Applications
| John Deere | ZTrak 737, ZTrak 757, ZTrak 777, ZTrak 797 |
Replacement Numbers
| John Deere | TCA12522 |
| Warner | 5218-307 |
| Warner | 5218-91 |
Products Advantages
Why Choose Our Electric PTO Clutch over Generic Replacements?
Our Solution:
Clockwise Rotation - Must-Match Specification
Unlike the vast majority of John Deere PTO clutches - which run counter-clockwise - the ZTrak 737, 757, 777, and 797 require clockwise (CW) rotation. This is not a preference; it is a hard driveline requirement dictated by the deck belt routing on these commercial diesel zero-turn platforms. Installing a CCW clutch on a ZTrak 7-series machine will reverse the blade direction at best and cause immediate belt derailment or deck damage at worst. This clutch is engineered specifically for CW rotation - no adaptation, no workaround, no risk.
1-1/8-Inch Oversized Bore for Diesel Crankshafts
The 1.125-inch bore is sized specifically for the larger-diameter crankshafts on the Yanmar and John Deere diesel engines powering the ZTrak 7-series. This is a step up from the 1-inch bore used on gasoline-powered residential and prosumer John Deere platforms. A 1-inch clutch will not physically mount on a 1-1/8-inch crankshaft - and forced-fit attempts risk crankshaft journal scoring and clutch hub fracture. This clutch slides onto the ZTrak's diesel crankshaft with the correct interference fit, no adapters, no machining.
200+ ft-lbs Diesel-Grade Torque / 200+ ft-lbs
The ZTrak 7-series is John Deere's commercial diesel zero-turn line - machines that run 60-inch and 72-inch decks through commercial properties for 8+ hours a day, powered by 22–31 HP diesel engines with significantly higher low-end torque than gasoline equivalents. This clutch is rated at 200+ ft-lbs to handle the diesel torque curve and the rotational inertia of heavy commercial decks. A gasoline-rated clutch in the 100–125 ft-lb range will slip under the sustained low-RPM torque of a diesel engine engaging a 72-inch deck loaded with wet grass.
Four-Model Diesel Fleet Compatibility
One clutch covers the entire John Deere ZTrak 7-series diesel lineup: 737, 757, 777, and 797. For commercial mowing fleets that run mixed ZTrak 7-series units, a single SKU simplifies spare-parts inventory - one clutch on the service truck covers every diesel ZTrak in the fleet. The shared Warner 5218-91 architecture across all four models means identical bolt torque, identical electrical connector type, and identical installation procedure, reducing mechanic training overhead and eliminating the risk of grabbing the wrong clutch from the parts shelf.
Quality and Craftsmanship Details
Products Package
About Us
As a premier garden machinery parts supplier, Jiaxing Norsun Trading Co., Ltd. bridges global distributors with over 100 vetted China manufacturers. We streamline your B2B supply chain through strict quality control, flexible production, and factory-direct wholesale pricing. Partner with us for reliable, high-volume sourcing of precision-engineered outdoor power equipment components.
Trusted Partnership Power
YOUR PROFESSIONAL ONE-STOP SOURCE
FOR 10000+ OUALITY PARTS
Verified Factory Excellence
BACKED BY 200+ TRUSTED FACTORY PARTNERS
Production process
Quality control
Expo experience
Customer Reviews
FAQ
Q: How do I select the correct electric PTO clutch for my specific mower model?
A:To guarantee a 100% exact fit, you need to verify four critical mechanical dimensions:1. Shaft Bore Size: Common sizes are 1" (25.4 mm) or 1-1/8" (28.6 mm).2. Pulley Outer Diameter (OD) & Belt Width: Matches your deck's V-belt size (e.g., 1/2" or 5/8").3. Rotation Direction: Clockwise (CW) or Counter-Clockwise (CCW) when viewing from the pulley end.4. OEM Cross-Reference: Compare with original numbers (Warner, Ogura, John Deere, etc.).If you provide us with your engine model or original part number, our engineering team will cross-check our database and provide a 3D fitment drawing for confirmation.
Q: What measures are taken to prevent the coil from burning out during heavy-duty operation?
A: Our electric PTO clutches are built with Class H insulated copper wire, rated for temperatures up to 180°C (356°F). Combined with dual-sealed C3 high-speed bearings and dynamic balance calibration, our design reduces friction-induced heat, significantly lowering the risk of thermal coil failure under prolonged high-load conditions.
Q: What is your quality inspection protocol before shipment?
A:Every single clutch (100% full inspection, not random sampling) passes through our 4-step automated testing rig before packaging:
1. Coil Resistance & Amperage Test: Verifies electrical integrity.2. Static Torque Capacity Test: Ensures proper torque engagement under load.3. Air Gap Precision Check: Factory preset to optimal clearance (0.012" - 0.020") for immediate response.4. Dynamic Balance & Noise Level Test: Ensures vibration-free operation.
Q: Do you offer custom OEM/ODM development for specialized lawn equipment manufacturers?
A: Yes. We regularly partner with OEM machine builders and private-label brand owners. Our customization capabilities include:Custom Wiring Harnesses: Wire gauge, sleeve protection (corrugated/braided), and waterproof connector types (Deutsch, Molex, Amphenol).Custom Pulley Configurations: Single/double groove, specific ODs, and anti-corrosion plating.Branding & Packaging: Laser-etched logos/part numbers on the steel body, custom color box packaging, and barcoded master cartons.
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