A crankshaft isn’t just another engine part — it’s the backbone of the bottom end. Every stroke, every load, every job runs through it. When it’s worn or cracked, the whole machine is at risk. That’s why this Q-Power® remanufactured crankshaft is built to restore strength and reliability to Cummins® 3.9L engines powering Case® and Case IH® equipment.
This crankshaft is precision remanufactured and balanced to meet OEM tolerances, giving you dependable performance without the cost of new OEM. Designed for 4-390, 4B, 4BT, and 4BTA 239 CID 4-cylinder externally balanced Cummins® engines, it delivers the durability your machine needs to keep working hard in the field or on the jobsite.
Fits Case® 580K backhoe-loaders and Case IH® tractors 5120 and 5220. Built to replace Cummins® part numbers 3907803 and 3903827, with OEM reference numbers J908031 and J918323.
When you’re rebuilding a hardworking machine, don’t gamble with a questionable core. A Q-Power® reman crankshaft gives you the solid foundation your engine needs to keep moving dirt, pulling loads, or powering through the season.
As a family-owned company, Abilene Machine has been providing farmers with dependable agricultural replacement parts for over 40 years. Whether you need to make a repair or perform scheduled maintenance, you can depend on us to help keep your equipment in great working condition. And if you have any questions, please do not hesitate to contact our knowledgeable sales staff. We have over 100 years of combined ag parts sales experience to assist you.
Warranty Info
Abilene Machine, LLC offers a standard 1-year warranty on all new, used and remanufactured parts. Abilene Machine reserves the right to inspect any or all parts returned for warranty before warranty claims will be honored. In all instances, Abilene Machine's sole liability will be either replacing the defective part or a refund not to exceed the purchase price of the defective part.
