This is the Alliant Power AP52901, a Denso common-rail fuel injector remanufactured by Alliant Power for John Deere 4045 4.5L and 6068 6.8L PowerTech engines. It is the Denso 095000-6490 injector and it replaces John Deere RE546781, RE524382, RE529118, DZ100217 and SE501926. Catalogs list it for the 7200R, 7230R and 7630 tractors, the 4730 sprayer, the 624J, 624K, 644J and 644K loaders, the 250G LC and 270D LC excavators, the 640H and 648H skidders and the 643L feller buncher.

Hard starting, a rough idle, a miss on one cylinder, white or black smoke, fuel in the oil and low rail pressure faults are the usual reasons these injectors get replaced. Dirty or wet fuel is the common cause, so sort out the filters and the tank before new injectors go in. John Deere used several different Denso injectors on the 4.5L and 6.8L common-rail engines, and the same machine model can take more than one of them depending on the engine build. In this family, AP52900 is the 095000-5050 injector, AP52901 is 095000-6490, AP52903 is 095000-6320, AP52905 is 095000-7150 and AP52906 is 095000-6500. The 624J shows up under both AP52900 and AP52901, and the 624K and 644K show up under both AP52901 and AP52905, so the number on the old injector decides.

Specifications

Fits / Applications

• John Deere 7200R, 7230R and 7630 tractors
• John Deere 4730 sprayer
• John Deere 624J, 624K, 644J and 644K loaders
• John Deere 250G LC and 270D LC excavators
• John Deere 640H and 648H skidders and 643L feller buncher
• Only engines built with the Denso 095000-6490 injector. Check the number on your old injector.
• Four injectors on the 4045, six on the 6068

Each injector carries its own trim code. That code has to be programmed into the engine controller for the cylinder it goes in, or the engine will not run right. Fit new fuel filters, keep every line and fitting clean and capped while the system is open, and torque the hold-down and the solenoid terminal nuts to the John Deere figures.

Part Numbers & Cross Reference

Alliant Power AP52901  ·  Denso 095000-6490  ·  John Deere RE546781  ·  John Deere RE524382  ·  John Deere RE529118  ·  John Deere DZ100217  ·  John Deere SE501926

Cross-reference numbers can change with engine serial, build year and emissions tier, so treat this list as a starting point. Send us your engine serial number and we will confirm the exact match against your build before anything ships. That check is free and takes a few minutes.

Frequently Asked Questions

Will the AP52901 fit my John Deere 644K loader?

Catalogs list the 644K under both AP52901 and AP52905, so the machine model alone does not settle it. Match the Denso 095000-6490 or RE546781 number on your old injector, or call 530-668-0818 with the engine serial number.

What numbers does the AP52901 replace?

Denso 095000-6490 and John Deere RE546781, RE524382, RE529118, DZ100217 and SE501926.

Is it new or remanufactured, and is there a core?

It is a Denso injector remanufactured by Alliant Power. A refundable core applies, and it comes back when we receive your old injector.

Does this injector need to be programmed?

Yes. Each injector has its own trim code, and that code is entered into the engine controller for the cylinder the injector goes in.

Related Parts

• John Deere 4045 4.5L & 6068 6.8L Common-Rail Fuel Injector | Alliant Power AP52900 Remanufactured (RE516540)
• John Deere 4045 4.5L & 6068 6.8L Common-Rail Fuel Injector | Alliant Power AP52905 Remanufactured (RE534111)
• John Deere 4045 4.5L & 6068 6.8L Common-Rail Fuel Injector | Alliant Power AP52906 Remanufactured (RE546782)
• John Deere 6068T & 6068D 6.8L DE10 Fuel Injection Pump | Stanadyne 06320 New (RE568067)

Why Buy From Valley Fuel Injection

We are a diesel fuel-injection and turbocharger shop in Woodland, CA, rebuilding pumps, injectors and turbos on our own benches since 1993, not a drop-ship storefront. When you call, you talk to the people who test these units. We verify fitment against your engine serial, VIN or build date before anything ships, so the right part arrives the first time.

Not sure the injectors are the problem? We test and diagnose in-house before you buy. See our common rail injector testing and rebuild service.