3126 Diesel Engine Assembly
Proven CAT 3126 Platform with Strong Reliability
The CAT 3126 is a legendary inline 6‑cylinder 7.2L diesel engine, widely recognized for heavy‑duty durability, stable performance, and long service life in industrial, excavator, truck, and marine applications.
Multiple Power Ratings for Versatile Use
Available in 275 HP @ 2400 RPM and 300 HP @ 2100 RPM versions, providing strong torque and power suitable for construction machinery, trucks, pumps, generators, and industrial equipment.
Genuine CAT Parts & Standardized Assemblies
Built with genuine CAT components including 0R9964 short block, 10R9014 long block, 0R7907, 151-7122, 158-5252, 215-1516, ensuring OEM fit, performance, and compatibility.
The CAT 3126 diesel engine assembly is a high-performance 7.2L inline six‑cylinder power unit designed for industrial, truck, excavator, and heavy‑duty applications. With power outputs from 275 HP to 300 HP and a robust turbocharged design, it delivers strong torque, stable operation, and excellent fuel efficiency. Built around genuine CAT components including the widely used 0R9964 short block, 10R9014 long block, and various AR assemblies such as 151-7122, 158-5252, and 215-1516, this engine ensures OEM-level quality, durability, and compatibility. Every unit is carefully inspected and run-tested to guarantee reliable performance before delivery.
Test-Run & Fully Inspected for Quality
All used engines are run-tested, internally inspected, and verified to ensure good compression, stable idle, strong power output, and leak-free operation.
Turbocharged Design for High Efficiency
Equipped with a turbocharger for improved airflow, combustion efficiency, and power density, delivering strong low‑end torque and reliable performance under load.
Wide Compatibility & Easy Installation
Fits a wide range of CAT machinery, trucks, industrial pumps, and mobile equipment. Standard mounting, wiring, and connections allow for straightforward installation and replacement.
Flexible Supply: New, Used & Reman Options
Available as brand-new crate engine, good used runner, and remanufactured assembly, with low-hour units, warranty support, and fast shipping to meet different budget and project needs.
As one of Caterpillar’s most popular and dependable mid‑range diesel engines, the CAT 3126 offers exceptional versatility for construction equipment, trucks, generators, water pumps, and industrial machinery. Available in brand-new crate, low-hour used, and remanufactured versions, it provides cost-effective power solutions without compromising quality or reliability. Backed by complete part numbers, serial number verification, and test documentation, the CAT 3126 engine assembly is a trusted choice for repairs, replacements, repowers, and full machine rebuilds worldwide.
