Description
Remanufactured EUI fuel injector supplied as PAI 609903X exchange unit for Detroit Diesel Series 60 11.1L / 12.7L engines, replacing OEM R5234945 / 5234945. Each unit is rebuilt with calibrated flow, leak-down, and timing testing to restore OEM-equivalent atomization on DDEC II / DDEC III electronics.
Signs You Need a New Series 60 Fuel Injector
- Rough idle, misfires, or single-cylinder cutout
- Excessive black smoke or visible loss of power
- Decreased fuel economy
- Hard starting or extended cranking
- Injector-balance / cylinder-contribution faults in the ECM
Specifications
| Manufacturer | PAI Industries |
|---|---|
| Part Number | 609903X |
| Part Type | Electronic Unit Injector (EUI) |
| Engine Compatibility | Detroit Diesel Series 60 11.1L / 12.7L |
| Electronics | DDEC II / DDEC III |
| Condition | Remanufactured (exchange) |
| Country of Origin | U.S.A. |
Cross References
This part replaces or is equivalent to the following part numbers:
- Detroit Diesel: R5234945, 5234945, RB5234945, EX634945
- Interstate-McBee: M-5234945
- Freightliner: DDER5234945
- PAI Industries: 609903X
Applications
This injector fits the following engines:
- Detroit Diesel Series 60 11.1L / 12.7L (DDEC II / DDEC III, ~early-1990s)
Representative vehicles using these engines:
- Freightliner FLD120 / Century / Classic (Series 60 12.7L)
- Sterling A-Line / L-Line (Series 60 12.7L)
- Western Star 4900 / 5900 (Series 60 12.7L)
Core charge applies. Verify engine serial number, DDEC version, and original injector part number before ordering.
