Caterpillar C32B Diesel Engine

The new 32.1-liter Cat C32B engine has been re-engineered to boost power density and reliability while extending the time between rebuilds when compared with the previous generation engine on newly developed engine ratings.

The C32B delivers power up to 1,200 horsepower and 4,323 lb.-ft. The engine is for use in large loaders, cranes, surface hauling equipment, and other applications.

The new engine block is made from a strong cast-iron alloy known for its durability with internal changes made to increase structural capability. The induction hardened crankshaft includes larger journal diameters and increased bearing area to handle higher loads. The connecting rods also include larger journals to increase durability by optimizing bearing performance.

An improved lube system offers a higher capacity oil pump, an oil cooler with improved performance, and higher flow piston cooling jets.

The C32B has a thicker shim gasket than its predecessor to increase head-to-block sealing. The piston features increased compression height enabling increased power density for select applications. The cylinder head has been upgraded to include design features that integrate external fuel lines along with an optimized water jacket geometry to improve heat transfer. 

The cylinder head components feature updated valve geometry and oil metering stem seals to reduce wear and extend cylinder head life.  Its new dual sensor coolant protection feature detects potential cooling system leaks sooner to avoid costly downtime. 

The C32B features dual-can diesel oxidation catalyst (DOC) aftertreatment. The engine platform enables the use of renewable liquid fuels such as 100% HVO.