Cat® C1.5 Industrial Power Unit

Cat® C1.5 Industrial Power Unit

The Cat® C1.5 Industrial Power Unit is offered in the following rating: 24.2 bkW (32.5 bhp) @ 3000 rpm. This rating meets U.S. EPA Tier 4 Interim equivalent, EU Stage IIIA equivalent emission standards. 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.

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Power Rating

Minimum Rating
Maximum Rating
Rated Speed
3000 rpm

Emission Standards

U.S. EPA Tier 4 Interim Equivalent, EU Stage IIIA Equivalent


Engine Configuration
Inline 3, 4-Stroke-Cycle Diesel
84 mm (3.3 in)
90 mm (3.5 in)
1.496 L (91 in³)
Naturally Aspirated (NA)
Compression Ratio
Rotation (from flywheel end)
Cooling System Capacity
5.98 L (6.3 qt)
Lube System (refill)
6 L (6.3 qt)

Power Unit Dimensions (Approximate. Final dimensions dependent on selected options)

820 mm (32.3 in)
497 mm (19.6 in)
793 mm (31.2 in)
Weight - Net Dry (Standard configuration without oil, cooling, clutch, compressor, A/C)
175 kg (385.8 lb)

Standard Equipment

  • Air Inlet System
    • Inlet manifold
  • Control System
    • Alternator 12 volt 65 amp
    • Starter motor 12 volt
    • Glow plug starting aid
    • Tier 4 Final: Alternator 12V 85 amp
  • Cooling System
    • Belt-driven coolant pump
    • Coolant temperature switch
    • Mounted air cleaner
    • Mounted radiator and fan
  • Flywheel & Flywheel Housing
    • Naturally Aspirated: SAE No. 7 1/2 flywheel
    • Choice of SAE No. 4, SAE No. 5 or standard backplate flywheel housing
  • Fuel System
    • Fuel injection pump
    • Fuel filter
    • Electronic Shut-off Solenoid (ESOS)
  • Lube System
    • Spin-on lube oil filter
    • Lube oil pressure switch
    • Lube oil sump
  • Power Take Off (pto)
    • Provision for timing case rear facing PTO
  • General
    • Cast iron, engine block
    • Cast iron exhaust manifold--side outlet
    • Cold start capability to -20° C (-4° F)
    • Gradeability 35° continuous
    • Paint: Caterpillar yellow, with optional colors available at request