3190677 New Aftermarket Hydraulic Unit Injection Pump fits Caterpillar C7 C9 Engine – GOTTO

Product Specifications:

Engineered to restore hydraulic actuation pressure in demanding heavy construction environments, the 3190677 is a high-performance aftermarket HEUI (Hydraulically Actuated Electronically Controlled Unit Injection) Actuation Pump. Precision-built for the versatile CAT C7 and C9 diesel engines (the core powerplants for widely used excavators like the 330D and 336D, as well as 950H wheel loaders and 140K motor graders), this heavy-duty pump effectively resolves hard starting, sudden loss of hydraulic power, and erratic engine performance. Manufactured with advanced internal valving and high-stress seals, it ensures reliable plug-and-play installation. Construction fleet managers can completely bypass expensive dealership replacements, instantly restoring optimal HEUI system pressure and peak earthmoving efficiency to keep critical site operations on schedule.

📊 Part Number Cross Reference

(Data verified via global catalog search – Extensive Interchangeability)

Manufacturer Ref (Bosch Style)	Original Equipment (CAT)
3190677	319-0677 / 10R8899
254-4357 / 319-0675	387-9433

🚛 Fits Applications (Engine & Vehicle)

(Verified application list)

Make	Model / Application	Engine Size	Year	Engine Code & Specs
CAT	324D, 325D, 329D, 330D, 336D Excavators	Various	Various	C7 / C9 HEUI
CAT	950H, 962H Wheel Loaders	Various	Various	C7 HEUI
CAT	120K, 12K, 140K, 160K Motor Graders	Various	Various	C7 HEUI
CAT	AP-1055D, BG-2455D Pavers	Various	Various	C7 HEUI

👨‍🔧 Tech Notes & Installation Guide (FAQ)

Q: Why is replacing the HEUI actuation pump critical for my C7 / C9 engine performance?

A: Operating heavy construction equipment with a failing HEUI pump leads to insufficient oil pressure required to actuate the fuel injectors. This results in severe engine misfires under heavy hydraulic loads, extended cranking times, and a catastrophic loss of digging and pushing power. Installing a brand-new, high-pressure actuation pump ensures the injection system receives the necessary oil pressure, restoring immediate throttle response and factory operational torque.

Q: Does the 3190677 HEUI pump require IMA coding?

A: No. This high-pressure oil actuation pump is built to precise mechanical tolerances for direct bolt-on installation. It operates purely as a hydraulic pressure source for the HEUI system and requires zero complex ECU programming or dealership calibration. It provides a true plug-and-play solution, significantly reducing critical downtime for your heavy equipment fleet.

Q: What is the critical cleaning step before installation?

A: HEUI systems are extremely sensitive to oil contamination. You must completely flush the engine oil system and install brand-new OEM-specification oil and fuel filters prior to engine startup. Failure to remove abrasive metal debris from a previous pump failure will cause immediate scoring in the new pump and injectors, which will firmly void your warranty.

🔍 Explore More Heavy Duty Parts:

• Looking for more options? Browse our complete selection of Fuel Injectors & Pumps.

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⚖️ Legal Disclaimer

Part numbers, OE numbers, and brand names mentioned above are for reference and identification purposes only. This product is a compatible aftermarket replacement part and is NOT manufactured, sponsored, or affiliated with the original equipment manufacturers.