CALL (800) 909-7060

Case Cummins 4390 Engine Extended Long Block

480E, 480F, 580SE, 580K, 580SK, 580L, 580SL, 590T, 590SL, 580M I, 580SM I, 590SM I, 584E, 585E, 585G, 586E, 586G, 450C, 455C, 550, 550E, 550G, 550H, 650, 650E, 650G, 1840, 1845C, 40XT, 60XT, 70XT, 75XT, 85XT, 90XT, 95XT, W11B
4390 Extended Engine Long Block - New
An overall view of the Case 4B/4BT NEW Long Block PLUS, showcasing its robust construction and precision engineering. The block, crankshaft, and camshaft are clearly visible, highlighting the product's comprehensive nature.
Fits Models:
Part # CS-4390LB+N


Case 4B/4BT NEW Long Block PLUS

  • Replaces Cummins 3.9L (4390 / 4T390) (Turbo or Non-Turbo)
  • Includes: Block, Crankshaft, Camshaft, Pistons, Cylinder Head, Connecting Rods, Oil Pump, Water Pump, Oil Pan, Front Timing Gear Housing, Front Cover, Filter Housing, Oil Cooler, Timing Gears, Valve Covers
  • Uses 7mm Injectors (Not Included)


  • Backhoes: 480E, 480F, 580 Super E, 580K, 580 Super K, 580L, 580 Super L, 590 Turbo, 590 Super L
  • Forklifts: 584E, 585E, 585G, 586E, 586G
  • Dozers: 450C, 455C, 550, 550E, 550G, 550H, 650, 650E, 650G
  • Skid Steer: 1840, 1845C
  • Wheel Loader: W11B

Models that use an Inline Injection Pump will need to reuse original front cover (Instructions and gaskets are included for changeover):

  • Backhoes: 580L II (After Ser # JJG0239260), 580 Super L II (After Ser # JJG0239361), 590 Super L II (After Ser # JJG0210575)
  • Forklifts: 584E (Late), 585E (Late), 586E (Late), 585G, 586G, 
  • Dozers: 550G After Serial# JJG0255794, 550H, 650G After Serial# JJG0216449
  • Skid Steer: 1840 (Late), 1845C After Serial # JAF0250483

Revive your Case with the 4B/4BT NEW Long Engine Block PLUS - the ultimate replacement for Cummins 3.9L (4390 / 4T390)! Complete with all the essentials - Block, Crankshaft, Camshaft, and more, this long block is the perfect fit for your Backhoe, Forklift, Dozer, Skid Steer or Wheel Loader. Fits like a glove for popular models like the 580 Super E, 580K, 550H, 1845C and more. With 7mm injectors, you'll have the power you need to conquer any job. Reuse the original front cover for models with inline injection pumps - instructions and gaskets included. Don't miss out on this Case engine upgrade!


Shipping charges are calculated at checkout.
Items are NOT guaranteed to be in stock at the time of order.
Refunds are offered if the item is on back-order.

Can’t Find What You’re Looking For?

Our knowledgeable staff will be happy to help you with any of your tractor, backhoe, dozer, or engine parts needs.

1-800-909-7060 Parts Request Form

Shipping & Return Policy

Do you need your part quickly? You're in luck! We have warehouses all over the country to ensure a quick and easy delivery time. Most of our parts ship from our warehouses the same day you place your order. And many times, orders are delivered the next business day!

Our in house parts are manufactured following strict quality standards in our warehouse in Ohio. Parts such as hydraulic cylinders, pins, bushings, sheet metal, track adjusters, booms and dipper sticks are all ready to ship same day that they are purchased! With less time to wait for your shipment, you will be able to get back to work as quickly as possible.

Did you accidentally purchase the incorrect part? We offer returns and exchanges here at Broken Tractor. To proceed with a return, please call us toll free, and we will provide you with return authorization and a step by step return process for your convenience. We are more than happy to help you exchange your part for the correct one! Give us a call at 1-800-909-7060 and we would be pleased to help you.

Privacy Policy | Terms & Conditions

Copyright © 2023 Broken Tractor LLC - All Rights Reserved