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2 Spool Plumbing Kit for JD 4000 Series Tractors

  • $2,387.93
  • or

Koyker Plumbing Kit 683394

Due to high demand, this product will take approximately 4-6 weeks to ship.

This closed center plumbing kit is for the following John Deere 4000 Tractor Series Models: 4050, 4055, 4230, 4240, 4250, 4255, 4350, 4430, 4440, 4450, 4455 and 4630.

Shipping Note:
Shipped in 3 separate containers.

Package Includes:
(Most items not available for individual purchase)

  • 2 Spool Load Sensing Valve
  • 2 Spool Joystick
  • Valve Mount Plate
  • Joystick Handle Plate
  • Handle Plate
  • Cable Connector Kit
  • Color Coupler Plug Set - 2 Spool
  • 1/2" Quick Coupler Set
  • Manifold Block Kit
  • Hydraulic Hoses
  • Hose Wrap
  • Nylon Cable Ties
  • Oil Line Clamp
  • Hardware

Part Number: K683394

    This product does not qualify for returns. Please make sure this product is the correct size and will work for your equipment before purchasing. If you have questions or concerns, please contact our Koyker Customer Service Team at 1-800-456-1107.

    We try our best to ship orders in the timeliest manner possible. Each product may have a different level of manufacturing demand and timeframe for shipment.

    Shipping Rates

    We offer calculated shipping rates during the checkout process. USPS, UPS & FedEx services are available if the product ordered qualifies for those options.

    Order Processing

    Business Days: Monday-Thursday.
    Holidays, Fridays, Saturdays and Sundays are not included in processing days.

    If you have any questions or concerns about your order's status, please email us at to discuss.

    International Orders

    Customers are responsible for any brokerage fees incurred on shipping. Sioux Steel Company cannot calculate these fees.


    Products on this website do not qualify for returns. We understand this may cause you concern....

    We are here to help!

    Our customer service team is available Monday-Friday, 8am to 5pm CST to discuss the parts in question PRIOR to placing your order.

    Call us toll free at 1-800-557-4689 to talk and confirm your parts needed.

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    We distribute products through local dealerships in your area. Prices and product availability may vary between dealerships.

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    NOTE: All product specifications are subject to change or improvement without notice. We reserve the right to change product pricing at any time without further notice. Pricing may differ at the time of purchase.

    Contact Sioux Steel by emailing or by calling our customer service specialists at 1-800-557-4689 for additional information.

    SIOUX STEEL COMPANY FOUNDATION: 2% of the total sales dollars from this website are donated to the Leukemia and Lymphoma Society. Beating cancer is in our blood.

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    Ask a Question
    • Hello, just wondering if this will work for a 4640 also?

      Thank you for reaching out! Yes, that plumbing kit will fit the 4640. Thank you.

    • Is this an open Center or closed Center valve.

      Thank you for reaching out! The 2 Spool Plumbing Kit for JD 4000 Series Tractors is a closed center kit.


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