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Injector “ Cummins 4B, 4-390, 4B3.9L, 6B, 6-590 Includes: Natural, 7MM Tip, 12MM Nut, 155° spray angle, 4 spray orifice, .29mm spray orifice size, 220 “ 228 Bar (3190 to 3307 PSI) Opening Pressure Fits: 5130, 5230, 5240, 5250 Cpl's: 721 591 Cross Reference: J919304, JR919304, 3907173, 3909532, 3802037, 3802178, 3802328, 3919304, 3802328RX, 0432131875 Applications Fits: 5130, 5230, 5240, 5250 All manufacturer™s names, numbers, and symbols are registered trademarks of these manufactures and are supplied for reference purposes only. R. F. Equipment, Inc. / R. F. Engine is in no way implying that any part listed is the product of these manufacturer™s or that we are affiliated with any of these manufacturer™s. Cost per 1 Injector Exchange Required Core can be sent in advance, or you can pay an additional refundable core charge. Delphi Core Requirements Units must be properly indentified with their part number All acceptable cores must be intact and not damaged Fire damaged injectors will not be accepted Unacceptable cores will be scrapped immediately Cores must be returned within 12 months from the date of purchase The core return policy for the Delphi Exchange Electronic Unit Injector program is as follow: All Volvo and John Deere Electronic Unit Injector (EUI) cores returned must be exact replacement for unit ordered. Cores will not be accepted if they do not match replacement unit. For Series 60 cores please reference below: Group classification of cores: Group 1 - EX634785, EX634795, EX634865, EX634870, EX634935, EX634940, EX634945, EX634970 Group 2 - EX635550, EX635575, EX635580, EX635600, EX635605, EX635695, EX635915 Group 3 - EX636977, EX636978, EX637045, EX637466, EX637635, EX637650 Cores will be accepted for any of the Exchange Injectors within the specfic group classification. Example; if you purchased EX634795 you can return any of the part numbers listed in group 1 ONLY. Units must be properly indentified with their part number All acceptable cores must be intact and not damaged Fire damaged injectors will not be accepted Unacceptable cores will be scrapped immediately Cores must be returned within 12 months from the date of purchase CM117-3802328-RE Updated 2017-04-19 To avoid delays we recommend checking stock and availability prior to hitting "Buy it now". We can be contacted through eBay, by email or by phone. Many of the products offered are drop-shipped from the manufacturer to keep prices as low as possible. Items over 100 lbs are recommended to be shipped "truck freight", call for truck freight quote. We do not use freightquote.com; however we can beat most freight quotes found on our truck freight listings. TRUCK, AIR AND INTERNATIONAL FREIGHT ARE NON-REFUNDABLE for any reason. All customs duties and fees are up to the buyer and not included in any shipping costs. THANK YOU R.F. Engine
Warranty Information
Overview
We stand behind every part we sell — new, rebuilt, or used. While RF Engine is not the manufacturer and cannot extend additional warranties, we do guarantee that each product will arrive as described, in usable condition, and free from material defects or misrepresentation.
Warranty Coverage
- New Parts: Covered under the original manufacturer’s warranty. All terms and coverage are set by the manufacturer. Copies available upon request.
- Rebuilt, Reconditioned, and Used Parts: Backed by an inspection-only warranty unless otherwise stated. As with new parts, RF Engine cannot provide further warranty coverage beyond the manufacturer’s terms.
- No Additional Warranty: RF Engine does not offer any express or implied warranties. However, if an issue arises, we are here to assist and will support you through any applicable manufacturer claim process.
Our Guarantee
All parts are guaranteed to be in the condition stated at the time of sale and free from misrepresentation. If something isn’t right, we’ll work with you to resolve it — including returns, exchanges, or refunds when appropriate.
- We sell parts — we don’t make them — but we stand behind what we sell.
- Guaranteed to match the description or your money back.
- Manufacturer’s warranty applies where available; we’ll help if you ever need it.
Used Parts — What to Expect
Used parts are cleaned, inspected, and guaranteed to be usable, but please note:
- They often have signs of wear, surface rust, blemishes, or cosmetic imperfections.
- They may include old gaskets or residue and likely require further cleaning or machining before installation.
- They are not refurbished, remanufactured, or restored to like-new appearance.
We recommend careful inspection and strongly encourage installation by a qualified heavy-duty diesel mechanic.
- Worn, not worn out — used parts may show signs of age but are fit for service.
- All used parts are tested for usability, not appearance.
Questions?
If you have questions about a part’s condition, warranty, or how we handle returns and guarantees, feel free to contact us. We’re here to help.
Last Updated: June 22, 2025
All specifications and numbers are provided for reference only and should be independently verified before use. While we guarantee our parts match their descriptions and accept returns for any discrepancies, we cannot be held liable for installation costs, modifications, or consequential damages. Questions about compatibility? Contact our parts experts at 800-828-6943, sales@dieselcranks.com, or via live chat, Mon-Fri 8am-5pm EST.
