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John Deere JD600 Wheel Tractor After 200999 w/ 404D engine
John Deere 4020 Tractor Thru 200999 w/ 404D engine
John Deere 105 Combine 3001 - 19000 w/ 404D engine
John Deere 690B Excavator w/ 6404T, 6404A engine
John Deere 7700 Combine After 8000 w/ 404D engine
John Deere 6602 Combine After 1500 w/ 404D engine
John Deere 4010 Wheel Tractor w/ 381D engine
John Deere 4010 Tractor w/ 381D engine
John Deere 6602 Combine Thru 1500 w/ 404D engine
John Deere JD600 Wheel Tractor Thru 200999 w/ 404D engine
John Deere JD644 Wheel Loader w/ 6404T, 6404A engine
John Deere 4230 Tractor w/ 404D engine
John Deere 693B Feller Buncher w/ 6404T, 6404A engine
John Deere JD740 Log Skidder w/ 6404T, 6404A engine
John Deere 6600SH Combine After 305672 w/ 6404T, 6404A engine
John Deere 4040 Tractor w/ 404D engine
John Deere 6600 Combine After 156500 w/ 404D engine
John Deere 5200 Forage Harvester Early w/ 6404T, 6404A engine
John Deere JD690 Excavator w/ 6404T, 6404A engine
John Deere 4620 Tractor w/ 6404T, 6404A engine
John Deere 5200 Forage Harvester Late w/ 6404T, 6404A engine
John Deere 7020 Tractor Early w/ 6404T, 6404A engine
John Deere 6602 Combine After 163500 w/ 6404T, 6404A engine
John Deere JD644A Wheel Loader w/ 6404T, 6404A engine
John Deere 7700 Combine After 8000 w/ 6404T, 6404A engine
John Deere 5440 Forage Harvester w/ 6404T, 6404A engine
John Deere 4430 Tractor w/ 6404T, 6404A engine
John Deere JD690A Excavator w/ 6404T, 6404A engine
John Deere 7020 Tractor Late w/ 6404T, 6404A engine
John Deere 4520 Tractor w/ 6404T, 6404A engine
John Deere 4000 Tractor w/ 404D engine
John Deere 6404 Power Unit Irrigation Engine w/ 404D engine
John Deere 7700 Combine Thru 8000 w/ 404D engine
John Deere 4020 Tractor After 200999 w/ 404D engine
John Deere 105 Combine After 19000 w/ 404D engine
John Deere 4320 Tractor w/ 6404T, 6404A engine
John Deere JD646 Compactor w/ 6404T, 6404A engine
John Deere 4630 Tractor w/ 6404T, 6404A engine
John Deere 3010 Wheel Tractor w/ 254D engine
John Deere 3010 Tractor w/ 254D engine
John Deere 3020 Tractor Thru 122999 w/ 270D engine
John Deere JD500A Backhoe Thru 123113 w/ 270D engine
John Deere 510 Backhoe w/ 270D engine
John Deere JD500B Backhoe w/ 270D engine
John Deere JD500 Wheel Tractor w/ 270D engine
John Deere 3020 Tractor After 122999 w/ 270D engine
John Deere 500C Backhoe w/ 270D engine
John Deere JD500A Backhoe After 123113 w/ 270D engine
John Deere JD600 Wheel Tractor After 200999 w/ 404D engine
John Deere 4020 Tractor Thru 200999 w/ 404D engine
John Deere 105 Combine 3001 - 19000 w/ 404D engine
John Deere 690B Excavator w/ 6404T, 6404A engine
John Deere 7700 Combine After 8000 w/ 404D engine
John Deere 6602 Combine After 1500 w/ 404D engine
John Deere 4010 Wheel Tractor w/ 381D engine
John Deere 4010 Tractor w/ 381D engine
John Deere 6602 Combine Thru 1500 w/ 404D engine
John Deere JD600 Wheel Tractor Thru 200999 w/ 404D engine
John Deere JD644 Wheel Loader w/ 6404T, 6404A engine
John Deere 4230 Tractor w/ 404D engine
John Deere 693B Feller Buncher w/ 6404T, 6404A engine
John Deere JD740 Log Skidder w/ 6404T, 6404A engine
John Deere 6600SH Combine After 305672 w/ 6404T, 6404A engine
John Deere 4040 Tractor w/ 404D engine
John Deere 6600 Combine After 156500 w/ 404D engine
John Deere 5200 Forage Harvester Early w/ 6404T, 6404A engine
John Deere JD690 Excavator w/ 6404T, 6404A engine
John Deere 4620 Tractor w/ 6404T, 6404A engine
John Deere 5200 Forage Harvester Late w/ 6404T, 6404A engine
John Deere 7020 Tractor Early w/ 6404T, 6404A engine
John Deere 6602 Combine After 163500 w/ 6404T, 6404A engine
John Deere JD644A Wheel Loader w/ 6404T, 6404A engine
John Deere 7700 Combine After 8000 w/ 6404T, 6404A engine
John Deere 5440 Forage Harvester w/ 6404T, 6404A engine
John Deere 4430 Tractor w/ 6404T, 6404A engine
John Deere JD690A Excavator w/ 6404T, 6404A engine
John Deere 7020 Tractor Late w/ 6404T, 6404A engine
John Deere 4520 Tractor w/ 6404T, 6404A engine
John Deere 4000 Tractor w/ 404D engine
John Deere 6404 Power Unit Irrigation Engine w/ 404D engine
John Deere 7700 Combine Thru 8000 w/ 404D engine
John Deere 4020 Tractor After 200999 w/ 404D engine
John Deere 105 Combine After 19000 w/ 404D engine
John Deere 4320 Tractor w/ 6404T, 6404A engine
John Deere JD646 Compactor w/ 6404T, 6404A engine
John Deere 4630 Tractor w/ 6404T, 6404A engine
John Deere 3010 Wheel Tractor w/ 254D engine
John Deere 3010 Tractor w/ 254D engine
John Deere 3020 Tractor Thru 122999 w/ 270D engine
John Deere JD500A Backhoe Thru 123113 w/ 270D engine
John Deere 510 Backhoe w/ 270D engine
John Deere JD500B Backhoe w/ 270D engine
John Deere JD500 Wheel Tractor w/ 270D engine
John Deere 3020 Tractor After 122999 w/ 270D engine
John Deere 500C Backhoe w/ 270D engine
John Deere JD500A Backhoe After 123113 w/ 270D 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.
