Fuel Injector 2872068 4984756 5579407 for Cummins Engine 6C8.3 ISC8.3 ISL9 QSL9 ISL8.9 QSC8.3 QSL9.3
This fuel injector is engineered as a direct replacement for the Cummins Engine 6C8.3 ISC8.3 ISL9 QSL9 ISL8.9 QSC8.3 QSL9.3. Manufactured to meet or exceed OEM specifications, it delivers reliable performance in demanding conditions. Each unit is tested for fuel flow, pressure rating, and durability before leaving the factory to ensure consistent quality across every order.
Vehicle Compatibility
| Application | Details |
|---|---|
| Fuel Injector 2872068 4984756 5579407 for Cummins Engine 6C8.3 ISC8.3 ISL9 QSL9 ISL8.9 QSC8.3 QSL9.3 Condition: New Aftermarket Part Note: We recommend replacing the entire set of fuel injectors to ensure the engine’s optimal performance. Due to differences in oil output and atomization concentration between genuine and aftermarket parts, they should not be mixed. Replacing the entire set of injectors helps avoid potential issues. Replacement Part Number:2872068, 4984756, 5579407, 19515687D Fit For Cummins Engine:6C8.3, C GAS PLUS CM556, G8.3, G8.3 CM558, GTA8.3 CM558, ISC CM2150, ISC CM554, ISC CM850, ISC8.3 CM2250, ISC8.3 G CM2180 C101, ISL CM2150, ISL CM554, ISL CM850, ISL G CM2180, ISL8.9 CM2150 L110, ISL8.9 CM2880 L112, ISL9 CM2150 SN, ISL9 CM2250, ISL9 CM2350 L101, ISL9 CM2350 L111, ISLE4 CM850, L GAS PLUS CM556, L8.9, L8.9 L121, L8.9G CMOH2.0 L125B, L9 CM2350 L116B, L9 CM2350 L119B, L9 CM2350 L120C, L9 CM2350 L123B, L9.3 L105, L9.5 L117, L9N CM2380 L124B, QSC8.3 CM2250, QSC8.3 CM2880 C102, QSC8.3 CM554, QSC8.3 CM850(CM2850), QSL9 CM2250, QSL9 CM2250 L115, QSL9 CM2350 L102, QSL9 CM2350 L107, QSL9 CM2350 L118, QSL9 CM2350 L122, QSL9 CM554, QSL9 CM850(CM2850), QSL9 G CM558, QSL9 M CM2250 L106, QSL9.3 CM2880 L113 | See product specifications |
Replaces OEM Part Numbers
2872068 • 4984756 • 5579407 • 19515687D • Cummins • Engine • 6C8.3 • CM556 • CM558 • GTA8.3 • CM2150 • CM554
Signs You Need a Replacement
If your equipment is showing any of these symptoms, the injectors & nozzle may be the cause:
- Rough idle or misfire — Uneven fuel delivery from a worn injector causes the engine to shake at idle. On Cummins engines, this is often accompanied by a knocking sound under load.
- Black or white exhaust smoke — Black smoke means excess fuel; white smoke indicates incomplete combustion. Both point to injector spray pattern degradation.
- Loss of engine power — A single failing injector reduces cylinder output. Multi-cylinder engines lose noticeable power when one injector flows less than the rest.
- Increased fuel consumption — Poor atomization means the engine burns more fuel to produce the same power. Monitor your fuel burn rate as an early warning sign.
- Hard starting or no start — If the injector doesn’t deliver fuel on cranking, the cylinder won’t fire. This is especially common in cold weather with worn nozzles.
- Fuel in engine oil (dilution) — Fuel leaking past the injector seat seal contaminates the crankcase oil. If the oil level rises or smells of diesel, inspect the injectors immediately.
Replace as a Set
Replace all injectors as a set whenever possible. On Cummins engines, mixing old and new injectors creates uneven fuel delivery — the new injectors compensate for the worn ones, shortening their life. When installing, use new copper sealing washers and torque to the specification in the service manual. After installation, run the engine at idle for 5 minutes to bleed air from the fuel system, then check for leaks at each injector connection before putting the machine under load.
Frequently Asked Questions
Which Cummins models does this part fit?
Refer to the Vehicle Compatibility table above for the full list of Cummins models. Each listing includes the body type, engine, and production years. Match your vehicle’s engine code (stamped on the engine block) against the listed codes to confirm.
Can I cross-reference 2872068 with 4984756?
Yes. Both 2872068 and 4984756 are interchangeable OEM numbers for this part. They refer to the same component with the same specifications, just different part number revisions.
How do I check if my engine code (CM556, CM558, CM554, CM850) matches?
The engine code is stamped on a metal tag attached to the engine block, usually near the timing belt cover or on the cylinder head. Compare the code you find with the list above. Engine codes are 3 to 6 characters long.
What are the common failure signs on a Cummins engine?
On Cummins engines, watch for black exhaust smoke under load, rough idle, misfire codes (P0300 series), and loss of power. A single failing injector can reduce engine output by up to 25%. If you notice fuel in the engine oil, the injector seat seal is likely compromised.
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