4307475
4307475 Cummins ISX15 X15 Injector: 2872405 XPI Specs
4307475, 4307475RX, 2872405, 2897320, 4307012, 4307525, 5579417, 2894920Integrated XPI ValveXPI Multi-Hole2500 barProduct Overview
The CUMMINS 4307475 is an authentic heavy-duty XPI (Extra-High Pressure Injection) common rail fuel injector engineered for 15.0L Cummins ISX15 and X15 diesel engines spanning EPA10, EPA13, GHG14, and GHG17 emissions standards (CM2250 and CM2350 control module platforms). Operating at peak rail pressures up to 2500 bar (36,250 psi), the XPI single-overhead-cam injection architecture delivers micro-precision multiple injection events for enhanced combustion efficiency, thermal stability, and soot reduction across 400 hp to 600 hp Class 8 heavy transport duty cycles. Part number 4307475 directly supersedes earlier factory production references 2872405, 2897320, 4307012, and 4307525, cross-referencing factory remanufactured part numbers 4307475RX, 4307475NX, 5579417PX, and 2894920PX. Each injector is precision flow-calibrated with an individual electronic Trim Code that must be entered into the engine ECM using Cummins INSITE to ensure uniform cylinder fuel balancing and avoid diagnostic trouble code P0087 (fuel rail pressure too low).
Always record the Cummins Trim Code stamped on the injector body and box label before installing into the cylinder head. Cummins 4307475 is the primary XPI extra-high-pressure common rail fuel injector for 15.0L Cummins ISX15 (CM2250 / CM2350) and X15 single-cam engines. Do NOT confuse with pre-2010 HPI-TP dual-cam mechanical unit injectors (CM870/CM871) or the aftertreatment 7th exhaust doser injector (SPN 3556). Follow the two-step clamp torque sequence: initial 20 N·m (15 lb·ft), final 80 N·m (59 lb·ft), and torque fuel connector jumper tube to 75 N·m (55 lb·ft).
Vehicle & Engine Fitment
| Vehicle | Engine | Years |
|---|---|---|
| Kenworth T680 / T800 / T880 / W900 | Cummins ISX15 / X15 (14.9L / 15.0L) | 2010-2024 |
| Peterbilt 389 / 579 / 587 / 567 | Cummins ISX15 / X15 (14.9L / 15.0L) | 2010-2024 |
| Freightliner Cascadia / Coronado / Columbia | Cummins ISX15 / X15 (14.9L / 15.0L) | 2010-2018 |
| International ProStar / LoneStar / LT625 / HX520 | Cummins ISX15 / X15 (14.9L / 15.0L) | 2010-2024 |
| Volvo VNL 670 / 780 | Cummins ISX15 / X15 (14.9L / 15.0L) | 2010-2017 |
| Western Star 4900EX / 4900FA / 5700XE | Cummins ISX15 / X15 (14.9L / 15.0L) | 2011-2023 |
Technical Specifications
| Specification | Value |
|---|---|
| SKU | 4307475 |
| Brand | CUMMINS |
| Type | Complete XPI Common Rail Fuel Injector |
| OE Number | 4307475, 4307475RX, 2872405, 2897320, 4307012, 4307525, 5579417, 2894920 |
| Injection System | Cummins-Scania XPI (Extra-High Pressure Common Rail) |
| Operating PressureCore Spec | |
| Torque Spec | 75 N·m |
| Hold Down Torque | 20 N·m + 80 N·m |
| Warranty | 12 Months |
| Emission Standard | EPA10 / EPA13 / GHG14 / GHG17 |
| Engine Family | Cummins ISX15 & X15 (14.9L / 15.0L) |
| Coding Required | Yes (Cummins INSITE Trim Code) |
Installation Tips
Tools needed: Cummins fuel connector tube socket or crowfoot wrench, Calibrated torque wrench (capacity up to 100 N·m / 75 lb·ft), Clean brass injector bore brush and shop vacuum extraction kit, Cummins INSITE electronic service diagnostic tool with INLINE interface
- Thoroughly clean the cylinder head injector bore using a brass bore brush and vacuum extraction; verify that old copper washers and combustion carbon deposits are completely removed from the lower seat.
- Inspect the injector hold-down clamp and bolt threads. Lubricate the clamp bolt threads and washer contact face with clean 15W-40 engine oil.
- Fit a brand-new O-ring seal onto the injector body and install a new copper sealing washer on the nozzle tip. Apply a light film of clean oil to the O-rings, strictly keeping the nozzle spray tip clean and dry.
- Insert injector 4307475 squarely into the cylinder head bore until the nozzle fully seats into the cylinder head cup.
- Install the high-pressure fuel connector jumper tube into the cylinder head side port, ensuring the alignment indexing ball engages the locating groove on the injector body. Thread the connector retaining nut finger-tight.
- Tighten the injector hold-down clamp bolt in two distinct stages: Stage 1 to exactly 20 N·m (15 lb·ft), then Stage 2 to a final torque of 80 N·m (59 lb·ft).
- Torque the fuel connector jumper tube retaining nut to 75 N·m (55 lb·ft) using the appropriate socket. Verify that the injector body did not rotate during tube torqueing.
- Torque the high-pressure fuel line nuts to 40 N·m (30 lb·ft) at both the fuel rail and connector tube inlets.
- Reinstall the rocker lever shaft assembly and valve cover; torque valve cover fasteners to 14 N·m (124 lb·in).
- Connect Cummins INSITE diagnostic software; navigate to Features and Parameters > Advanced ECM Data > Injector Calibration, and program the unique Trim Code stamped on the injector body into the corresponding cylinder position.
- Critical CM Platform Boundary: Never attempt to install XPI common rail injector 4307475 into pre-2010 dual-cam HPI-TP engines (CM870/CM871). The injection architecture and camshaft drive are completely incompatible.
- Trim Code Programming Mandate: Entering the exact alphanumeric Trim Code into Cummins INSITE is mandatory. Skipping this step forces the ECM to run on default or stale compensation tables, leading to cylinder balance fault codes, rough idle, and unburned fuel loading the DPF.
- Connector Tube Indexing: Ensure the indexing ball on the fuel connector tube seats cleanly into the injector side port before final torquing to 75 N·m. Misalignment causes severe high-pressure fuel leakage beneath the valve cover and immediate low rail pressure faults (P0087 / Cummins FC 559).
- Differentiate 7th Hydrocarbon Doser: If encountering exhaust aftertreatment active regen failures or SPN 3556 fault codes, inspect the exhaust-mounted aftertreatment fuel doser injector rather than replacing in-cylinder combustion injectors.
Frequently Asked Questions
What engines use Cummins injector 4307475?
Part number 4307475 is calibrated for 15.0L Cummins ISX15 and X15 single-overhead-cam diesel engines meeting EPA10, EPA13, GHG14, and GHG17 emissions standards (CM2250, CM2350, and early CM2450 control module platforms) installed in Kenworth, Peterbilt, Freightliner, International, Volvo, and Western Star Class 8 trucks.
What earlier part numbers does Cummins 4307475 replace?
Cummins 4307475 directly supersedes earlier production and service part numbers 2872405, 2897320, 4307012, 4307525, 5579417, and 2894920, and interchanges with factory remanufactured part numbers 4307475RX, 4307475NX, 5579417PX, and 2894920PX.
What are the torque specifications for installing injector 4307475?
The injector hold-down clamp bolt must be tightened in two stages: an initial torque of 20 N·m (15 lb·ft), followed by a final torque of 80 N·m (59 lb·ft). The high-pressure fuel connector jumper tube retaining nut must be torqued to 75 N·m (55 lb·ft), and the high-pressure fuel lines to 40 N·m (30 lb·ft).
Is ECM Trim Code calibration required after replacing 4307475?
Yes. Each XPI injector features an individual electronic Trim Code printed on the body and packaging. This code must be programmed into the ECM for that specific cylinder using Cummins INSITE to ensure accurate fuel quantity delivery and avoid cylinder-to-cylinder fuel imbalance.
Diagnostic Trouble Codes & Fault Protocols
Common diagnostic trouble codes (DTCs) triggered when this common rail injector experiences wear, circuit faults, or calibration drift:
Fuel Rail / System Pressure Too Low
Excessive internal backleak from worn control valve seats drops common rail pressure below target under engine load.
Injector Circuit Malfunction / Open Circuit
Solenoid coil resistance drift (0.2-0.5 Ω) or piezo stack degradation triggers driver stage shutdown on affected cylinders.
Cylinder Misfire & Balancing Deviation
Carbon-clogged nozzle spray holes or missing IMA calibration causes uneven cylinder contribution. Recode ECM and verify washer seating.
Fuel Rail / System Pressure Too High
Spill line backpressure or stuck metering valve prevents rail depressurization, creating overpressure risks under load.
Technical Diagnostic & Service Protocols
Authoritative field procedures, diagnostic testing thresholds, and service SOPs for this assembly.