The Cat® C4.4 ACERT™ Industrial Power Unit is offered in ratings ranging from 74.5-129.4 bkW (100-173.5 bhp) @ 2200 rpm, which meet U.S. EPA Tier 4 Final, EU Stage IV emission standards. Tier 4 Interim Equivalent and Stage IIIB Equivalent ratings are also available using Flex options. Conveniently pre-configured for a wide range of applications, the Cat® Industrial Power Unit is a complete power package containing a radiator, flywheel, alternator and alternator wiring completely pre-assembled for fast, straightforward installation in a number of OEM, customer and packager applications. These fuel efficient units are ready made for irrigation, industrial, mining and other pump applications.

Power Rating
Minimum Power 100 BHP
Maximum Power 173.5 BHP
Rated Speed 2200 rpm

Emission Standards
Emissions U.S. EPA Tier 4 Final, EU Stage IV

Engine Configuration Inline 4, 4-Stroke-Cycle Diesel
Bore 105 mm (4.1 in)
Stroke 127 mm (5.0 in)
Displacement 4.4 L (268.5 in³)
Aspiration Turbocharged Aftercooled (TA) or Twin Turbocharged Aftercooled (TTA)
Compression Ratio 16:2
Rotation from Flywheel End Counterclockwise
Cooling System - Capacity 9-9.4 L (8.2-8.5 qt)
Lube System - Refill 5.2-13.5 L (5.5-14.27 qt)

Power Unit Dimensions - Approximate
Height 1126-1150 mm (44.3-45.3 in)
Length 1433 mm (56.4 in)
Weight - Approximate, Net Dry - Standard Configuration Without Oil, Cooling, Clutch, Compressor, A/C 670-700 kg (1477-1543 lb)
Width 795-820 mm (31.3-32.3 in)

Aftertreatment Dimensions - Approximate
Diameter 244.9-270.3 mm (9.6-10.6 in)
Height 279-430 mm (11-16.9 in)
Weight 34-80 kg (75-176.4 lb)
Width 365-695 mm (14.3-27.4 in)