Caterpillar has unveiled its new Cat C32B diesel engine which it claims delivers best-in-class power density, enhanced durability, and greater reliability for large off-highway equipment across construction, mining, and industrial sectors.
Building on the proven success of the original C32 platform, the 32.1-litre, 12-cylinder C32B introduces extensive design upgrades that extend time between rebuilds while offering higher performance across a broad range of heavy-duty applications. The new engine is available now through Cat dealers worldwide.
The C32B produces up to 895 kW (1,200 hp) and 5,861 Nm (4,323 lb-ft) of torque for U.S. EPA Tier 4 Final, and 839 kW (1,125 hp) and 5,499 Nm (4,056 lb-ft) for EU Stage V markets. For less regulated territories, a peak rating of 1,007 kW (1,350 hp) and 6,166 Nm (4,548 lb-ft) is available.
Designed for versatility, the engine powers large loaders, cranes, dredgers, trenchers, pumps, compressors, and drilling rigs, among many other industrial applications.
“For nearly 20 years, the Cat C32 engine platform has set the standard for premium power and endurance in construction, mining, and other industrial applications,” said Steve Ferguson, Senior Vice President of Caterpillar Industrial Power Systems. “The new Cat C32B builds on this field-proven reputation with upgrades and technologies that will drive superior off-highway performance for years to come.”
Re-Engineered for Strength and Efficiency
Caterpillar has re-engineered the C32B from the ground up with a focus on durability, performance, and reduced maintenance. A new cast-iron alloy engine block provides increased structural strength, while a redesigned induction-hardened crankshaft and larger bearing surfaces improve load handling and reliability under extreme operating conditions.
The lubrication system has been upgraded with a high-capacity oil pump, enhanced oil cooler, and improved piston-cooling jets, ensuring consistent performance and reduced wear. To further boost reliability, Caterpillar introduced a thicker shim head gasket for improved sealing and redesigned pistons with increased compression height to support higher power output.
An optimized cylinder head now integrates external fuel lines and a new water jacket geometry for improved heat management, while revised valve geometry and oil metering stem seals extend component life.
Advanced Aftertreatment and Sustainable Options
The C32B also debuts a dual-can diesel oxidation catalyst (DOC) system — a maintenance-free, passive aftertreatment solution that eliminates the need for thermal management or regeneration, simplifying operations and reducing downtime.
Additionally, the C32B is compatible with renewable liquid fuels, including 100% hydrotreated vegetable oil (HVO), offering operators a sustainable pathway to reduced emissions without compromising performance.
To further ease OEM integration, Industrial Power Unit (IPU) configurations with pre-mounted aftertreatment and cooling packs will be available from the factory, lowering installation and validation costs for equipment manufacturers.
