This is the Alliant Power AP50901, a Denso common-rail fuel injector remanufactured by Alliant Power for the John Deere 6081 8.1L PowerTech engine. It is the Denso 095000-0550 injector and it replaces John Deere RE501010, RE524368 and SE501940. Catalogs list it for the 9660 STS and 9750 STS combines. It comes with an install kit of the seals and small parts needed to fit it.

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. The 8.1L common-rail engine used more than one Denso injector, and catalogs list the same combines under both. AP50901 is the 095000-0550 injector (John Deere RE501010). Its sibling AP50900 is the 095000-5150 injector (John Deere RE524361). The 9660 STS and 9750 STS show up under both, so the number on the old injector decides.

Specifications

Fits / Applications

• John Deere 9660 STS and 9750 STS combines
• Only engines built with the Denso 095000-0550 injector. Check the number on your old injector.
• Six injectors per engine

Use the new seals from the install kit, fit new fuel filters, and keep every line and fitting clean and capped while the system is open. Torque the hold-down and the solenoid terminal nuts to the John Deere figures. If your service tool asks for injector calibration data on this engine, enter the data supplied with each injector.

Part Numbers & Cross Reference

Alliant Power AP50901  ·  Denso 095000-0550  ·  John Deere RE501010  ·  John Deere RE524368  ·  John Deere SE501940

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 AP50901 fit my John Deere 9750 STS combine?

Catalogs list the 9750 STS under both AP50901 and AP50900, so the machine model alone does not settle it. Match the Denso 095000-0550 or RE501010 number on your old injector, or call 530-668-0818 with the engine serial number.

What numbers does the AP50901 replace?

Denso 095000-0550 and John Deere RE501010, RE524368 and SE501940.

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.

What comes with the injector?

The injector and an install kit with the seals and small parts needed to fit it. A 6081 takes six injectors.

Related Parts

• John Deere 6081 8.1L PowerTech Common-Rail Fuel Injector | Alliant Power AP50900 Remanufactured (RE524361)
• John Deere 8.1L PowerTech 6081 Common-Rail Fuel Injector | Alliant Power AP50902 Remanufactured
• John Deere 8.1L PowerTech 6081 Common-Rail Fuel Injector | Alliant Power AP50903 Remanufactured
• John Deere 4.5L 4045 & 6.8L 6068 PowerTech Common-Rail Fuel Injector | Alliant Power AP52903 Remanufactured

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.