Cummins Original PT Fuel Injector 3076703 – Precision Power For Heavy Diesel Common Rail Engines

 

Precision fuel metering stands as the cornerstone of durable diesel performance in heavy machinery. The 3076703 injector assembly is a pressure-atomizing unit engineered specifically for Cummins K19, K38, and QSK series engines . Designed to deliver atomized fuel at specific pressures into combustion chambers, this injector directly influences combustion efficiency, horsepower output, and emissions compliance . For workshops servicing mining haul trucks, marine propulsion, or stationary generator sets, this part ensures the fuel system operates within OEM tolerances.

 

Constructed with hardened internal components, including springs, plungers, and O-rings, the 3076703 injector is built to withstand the extreme pressures exceeding 25,000 PSI typical of modern Common Rail systems . The unit features a specific flow rate calibrated to match OEM delivery requirements, ensuring a precise spray pattern. This is defined as a pressure atomizing fuel nozzle assembly, incorporating a nozzle and internal valving that dictates injection timing. Referencing the factory service information or the part number on the body is the best practice for verification . The injector body is engineered to resist the corrosive effects of water and contaminants in diesel fuel, a common cause of failure in lesser-quality parts. The absence of a defined shelf life for this part indicates its robust storage stability for inventory management .

 

Primarily utilized in the Cummins K19 and K38 engine platforms, the 3076703 fuel injector is a staple in the heavy-duty sector . These engine families are widely found in construction machinery, power generation units, and marine propulsion systems. Whether used in a mining haul truck or a commercial fishing vessel, this injector ensures that the diesel engine maintains optimal horsepower under load . It is a critical stock-keeping unit for service providers who cater to industrial fleets. By replacing faulty injectors, you can resolve common symptoms such as hazy idle, hard starting, and white/blue-white smoke caused by over-fueling or delayed injection timing . This unit is essential for any workshop performing major overhauls on high-torque diesel engines where precision fuel metering is non-negotiable.

 

Proper installation is paramount to the longevity of the 3076703 fuel injector. Below is a comprehensive table outlining the technical compatibility and installation benchmarks required for a successful rebuild.

Specification Category	Parameter / Data
Part Number	3076703
Engine Platform	Cummins K19 / K38 / QSK19 / QSK38
NSN (NATO Stock Number)	2915-01-498-1287 / 2915-01-502-4125
Item Name Code (INC)	36605
CAGE Code (Supplier)	15434 (Cummins Inc.) / 0B8S3
Condition Codes	FN (Factory New), NE (New), OH (Overhauled)
Recommended Torque	Adhere strictly to OEM specifications to avoid distortion
Required Procedure	Injector compensation code or QR code programming via diagnostic tool is required after installation to match ECU mapping

 

The 3076703 injector is vital for the hydraulic efficiency of the high-pressure fuel system. Common Rail systems rely on the injector's ability to perform millions of cycles, and wear in the nozzle leads to a gradual decline in performance . Through our remanufacturing and calibration process, we balance flow rates to ensure reliability without compromising idle quality . When replacing an injector, cleanliness is the highest priority; opened fuel connections must be sealed off immediately to prevent the smallest particles from causing fuel system faults . If a cylinder is diagnosed as over-fueling, replacing this unit prevents secondary damage like cylinder washing or cracked pistons .

 

Q1: Can the 3076703 injector be used interchangeably with 3279719?
A: Yes. 3279719 is a superseding or alternate part number that crosses directly to 3076703. Always confirm the supersession chain with your supplier to ensure fitment for K19/K38 engines .

Q2: What is the minimum order quantity for bulk shipments to Africa/Southeast Asia?
A: Most suppliers accept a Minimum Order Quantity (MOQ) of 1 piece for samples, but bulk orders typically start at 6 units to reduce shipping costs for workshops .

Q3: Is this injector suitable for a marine KTA38 engine?
A: Absolutely. This part is widely used in marine propulsion units and auxiliary systems, particularly in KTA38 models requiring precision spray patterns for efficient fuel consumption at sea .

Q4: What is the warranty period for a new 3076703 injector?
A: Standard warranty periods range from 3 months to 1 year depending on the distributor, with a guarantee of OEM quality and functionality .

Q5: How should I clean the engine block before installation?
A: Clean the cylinder head injector bore thoroughly to remove old seals and carbon. New O-rings and seals should be lubricated with clean diesel oil during assembly to prevent damage to the nozzle.

 

 

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