CYEFI PT Injector 3076130 K19 KTA19 QSK19 K38 K50

CYEFI supplies the 3076130 as a PT/STC injector assembly for large-bore K-platform diesel engines. This unit meters fuel through pressure-time principles rather than electronic solenoid actuation, making it the correct service part for shops maintaining legacy mining haulage, marine propulsion, and prime power assets. Each injector is built with high-speed steel plunger and alloy steel body components, targeting rebuilders who prioritize repeatable rack travel and stable cold-start characteristics over low-bid pricing.

The 3076130 belongs to the K-STC injector family, distinct from N-series and M11 PT units in both body geometry and timing control architecture. Fitment covers K19 and KTA19 mechanical engines as well as QSK19 mining power modules and K38/K50 marine and stationary assemblies . Shops servicing Terex haul fleet powerplants or vessel auxiliary drives will recognize this part number as the correct STC injector for applications where fuel delivery must remain predictable across sustained load factors. It is not a substitute for PTD or PTB variants used in other engine families; the STC timing oil circuit integration is specific to this platform.

PT injector installation rewards preparation over speed. Before threading the 3076130 into the cylinder head, verify the cup sealing surface is free of carbon ridge accumulation-a compromised seat allows combustion gas to migrate past the copper washer and corrupt fuel metering accuracy. Lubricate O-rings with clean diesel rather than petroleum grease to avoid elastomer swelling during thermal cycling. Torque the hold-down clamp to K-series specification and confirm the injector rack travels freely through its full range before connecting linkage. On STC-equipped engines, verify the timing control oil passage is clear; a restricted STC circuit prevents timing advance under load, producing sluggish throttle response and elevated exhaust pyrometer readings .

While common rail platforms dominate new equipment sales, the 3076130 remains a volume-moving SKU for shops serving industrial and marine fleets with thousands of K-series units still in revenue service. The economic argument is direct: a failed PT injector typically announces itself through hard starting, black haze under acceleration, or a dead cylinder with a pyrometer spread exceeding 50°C . Replacing the 3076130 restores injection timing and atomization at a fraction of the cost of a remanufactured engine or a common rail retrofit. For wholesalers, stocking this injector alongside STC valve components and injector repair kits captures repeat orders from mining maintenance planners and marine surveyors who refuse to gamble on untested aftermarket units.

Q1: How do I verify a core is a genuine K-STC unit rather than a repainted N-series injector?
Measure body length and locate the STC timing oil port. K-STC bodies are dimensionally distinct; a repainted N-series unit will not seat correctly in a K19 head and will exhibit incorrect rack travel.

Q2: What causes premature 3076130 failure in mining fleet service?
Fuel contamination scoring the plunger bore. K-series PT systems return roughly 80% of fuel to the tank for cooling ; compromised filtration recirculates abrasives through the injector, wearing the metering orifice within hundreds of hours.

Q3: Can I install this injector without recalibrating the PT pump?
No. Every injector swap on a PT system requires a rack and pressure verification afterward. A new 3076130 paired with a worn pump runs lean at top end, masking the injector's restored flow and sending the technician chasing the wrong fault.

Q4: Do you provide batch traceability for wholesale orders?
Yes. Each CYEFI carton carries a production lot code linked to plunger lapping records and flow-bench verification data, available on request for distributors maintaining incoming inspection files.

Q5: What service interval is realistic in prime power applications?
Under clean fuel and steady load, 8,000–12,000 hours is achievable. Marine and mining units running variable load should plan inspection at 6,000 hours, focusing on cup erosion and rack stickiness.

Q6: Is the 3076130 compatible with ULSD and marine distillate blends?
Yes. Metallurgy and elastomer selections are compatible with low-sulfur fuels. The critical factor is lubricity and filtration, not sulfur content; install a 5-micron final filter ahead of the PT pump if operating on inconsistent bunker blends.