Third-function valve kits add convenient hydraulic commands to tractors and loaders, enabling simultaneous operations like curling a bucket while closing a grapple. This article highlights five top options, explains key features, and helps you compare choices for compatibility, ease of installation, and performance. Each kit powers through the loader’s power beyond port and provides a joystick-operated control for quick, reliable operation.
Product Snapshot
| Product | Brand | Key Features |
|---|---|---|
| Summit Hydraulics Third Function Valve Kit Compatible with Kubota L2501, L3200, L3301, and L3901 Tractors | Summit Hydraulics | Loader compatibility across multiple Kubota models; power beyond port powered; joystick with integrated momentary switches |
| AKWH Hydraulics Third Function Valve Kit Replacement for Kubota MX4700–MX5800 Series | AKWH | Designed for several MX Kubota models; multi-function capability without interfering with main hydraulics; high-pressure ratings |
| Summit Hydraulics Third Function Kit Compatible with John Deere 3025E, 3032E, 3038E | Summit Hydraulics | Weatherproof joystick; supports multiple John Deere compact tractors; robust pressure ratings |
| Summit Hydraulics Third Function Valve Kit for Kubota BX23S, BX1880, BX2380, and BX2680 | Summit Hydraulics | Rugged aluminum housing; strong pressure ratings; 15 GPM flow capability |
| Summit Hydraulics Universal Hydraulic Third Function Valve Kit with Joystick | Summit Hydraulics | Universal fit; 15 GPM flow; includes joystick handle and 1/2″ ag couplers |
Each option adds a dedicated hydraulic circuit, letting you operate attachments like grapples, augers, or tilt plows without sacrificing existing loader functions. The following sections detail five representative third-function kits to help you compare installation needs, performance specs, and compatibility with common tractors and loaders.
Summit Hydraulics Third Function Valve Kit For Kubota L Series
The Summit Kubota third-function kit is designed for multiple L-series tractors (L2501, L3301, L3901, and compatible loaders LA 525, LA 524, etc.). It taps into the loader’s power beyond port to run an additional hydraulic circuit, enabling simultaneous functions such as curling a bucket while closing a grapple. A key feature is the joystick handle replacement with two integrated momentary push-button switches, allowing precise one-touch control for opening and closing cylinders. The setup emphasizes compatibility with common Kubota loaders and supports efficient workflows on small-to-mid sized farms or property maintenance tasks.
Compatibility notes: This kit targets Kubota models with a compatible loader, including variations across LA loader configurations. The product emphasizes dual-function capability without interfering with the primary loader hydraulics, which is important for operators who need seamless multi-tasking during daily tractor operations. The included joystick replacement streamlines control, reducing the need for extra switchboxes or separate controllers on the operator’s panel.
AKWH Hydraulics Third Function Valve Kit For Kubota MX Tractors
AKWH’s third-function valve kit is designed for Kubota MX4700 to MX5800 series with compatible loaders. The kit adds an extra hydraulic function while preserving the tractor’s main hydraulic controls. It is powered by the power-beyond port, enabling concurrent functions like curling and grappling. Its specification list includes a max operating pressure around 5080 PSI with positive ratings for multiple ports, plus a compact package that suits tractors without backhoes. The setup is noted for broad applicability across MX-series tractors and loader configurations, making it a versatile choice for upgrading mid-size Kubota setups.
Key details include a 15 GPM flow rating and standard SAE O-ring ports, which influence compatibility with common hoses and fittings. Installation should account for existing loader valve routing and space for the new joystick. The kit’s emphasis on non-invasive operation helps maintain tractor usability through daily tasks and seasonal attachments.
Summit Hydraulics Third Function Kit For John Deere 3025E/3032E/3038E
This Summit kit targets compact John Deere models (3025E, 3032E, 3038E) and adds an electronically controlled hydraulic function via a weatherproof joystick. The kit specifies a maximum operating pressure around 5080 PSI and 15 GPM flow capacity, suitable for common attachments such as grapples or tilt mechanisms. The included joystick handle integrates two momentary switches, enabling quick open/close actions with a button press, which can improve efficiency in tight spaces or day-to-day use on the farm or property. The design emphasizes compatibility with John Deere loaders and straightforward maintenance.
Considerations for JD models include verifying loader compatibility and ensuring that the hydraulic porting matches the existing valve stack. The weatherproof joystick is a practical feature for outdoor use, but operators should confirm adequate protection against dust and moisture in their specific environment.
Summit Hydraulics Third Function Valve Kit For Kubota BX Series
Designed for Kubota BX23S, BX1880, BX2380, and BX2680 tractors, this Summit kit features a solid aluminum housing built for rugged use. The package carries high-pressure ratings (P = 5080 PSI, T = 3050 PSI, A & B = 5080 PSI) and a 15 GPM flow rating, which makes it well-suited for faster cycle times with compatible attachments. The aluminum construction provides improved durability in demanding applications like grapples or snow removal tools. Installation considerations include compatible loader models and ensuring the housing fits within the tractor’s under-hood clearance and hydraulic routing.
Operators should assess loader compatibility and ensure proper hose routing to prevent interference with other hydraulic components. The robust build and standardized flow and pressure specs help maintain performance across BX-series attachments, particularly during continuous or heavy use scenarios.
Hydraulic Third Function Valve Kit With Joystick Handle
This Summit Hydraulics kit emphasizes a compact monoblock design with a built-in relief valve and a 13 GPM maximum flow. The included joystick handle provides intuitive, electronic control of the additional hydraulic function, making it a practical choice for users seeking a straightforward upgrade without complicated wiring or extra controllers. The kit’s monoblock construction aims to minimize leaks and simplify maintenance, while the integrated relief valve helps protect the hydraulic system from overpressure during heavy operation. The 1/2″ ag couplers facilitate common hose connections found on many loader systems.
Considerations for this kit include ensuring adequate space for the monoblock unit and confirming that the power beyond port on the loader valve is compatible with the tractor’s hydraulic circuit. The included joystick offers immediate, ergonomic control but may require mounting considerations on tractors with limited dashboard or console space.
Summit Hydraulics Third Function Valve Kit For Kubota B2320/B2620/B2301/B2601
This kit stacks a third-function valve onto Kubota B-series tractors, including B2320, B2620, B2301, and B2601 with their respective LA loaders. It uses the loader’s power beyond port to enable additional hydraulic operations, enabling a smoother workflow when using attachments alongside the loader’s main functions. The included joystick handle replaces the factory control and brings two integrated momentary push-button switches for convenient opening and closing in one-hand operation. The design focuses on practical upgradeability and alignment with Kubota loader configurations commonly found on B-series models.
When evaluating this option, confirm loader compatibility and confirm space for mounting the joystick and valve assembly. The added control can broaden attachment functionality, but operators should ensure the added circuit does not impact the primary loader’s performance, especially under heavy load conditions.
Buying Guide: Key Purchase Considerations
- Compatibility: Verify tractor model, loader type, and loader valve configuration. Some kits are tailored to Kubota models, while others target John Deere or BX-series tractors. The loader’s power beyond port is a common mounting point, but space and routing matter for a clean installation.
- Flow and Pressure Ratings: Look for a kit that supports at least 5080 PSI and 15 GPM for typical mid-size attachments. Higher flow improves cycle speed for grapples and tilt mechanisms, but ensure your tractor hydraulic system can safely handle the added load.
- Control Interface: Joystick handles with integrated momentary switches offer one-handed operation. Consider whether the control is weatherproof and easy to mount within your cab or at the loader joystick area.
- Durability and Build Quality: Aluminum or robust cast housings, protective seals, and reliable relief valves help resist wear in outdoor environments. Check for corrosion resistance and a solid warranty.
- Installation Impact: Some kits are plug-and-play with quick-connect hoses, while others require custom routing and adaptation. Assess the need for professional installation or DIY with available instructions.
- Attachments and Versatility: If you plan to run multiple attachments (grapple, bucket, auger, snow plow), a 2‑function upgrade with a power beyond port can improve efficiency, but ensure hydraulic lines and fittings are compatible with your attachments.
- Maintenance and Support: Choose brands with accessible parts, replacement seals, and responsive customer support. This helps with long-term performance and ease of troubleshooting.
- Safety and Compliance: Ensure the kit complies with your tractor’s hydraulic safety standards, including proper relief valve settings and secure mounting to reduce vibration and leaks.
Across these options, buyers should weigh compatibility with their loader configuration, the durability of the control mechanism, and whether the added functionality aligns with their attachment needs. A well-matched third-function kit can save time and reduce reconfiguration by enabling concurrent hydraulic actions without compromising main loader performance.
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