C1.5 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


  • 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

Select Units


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.

Power Rating

  • Minimum Rating 32.5 BHP 24.2 bkW
  • Maximum Rating 32.5 BHP 24.2 bkW
  • Rated Speed 3000 rpm 3000 rpm

Emission Standards

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


  • Engine Configuration Inline 3, 4-Stroke-Cycle Diesel Inline 3, 4-Stroke-Cycle Diesel
  • Bore 84 mm (3.3 in) 84 mm (3.3 in)
  • Stroke 90 mm (3.5 in) 90 mm (3.5 in)
  • Displacement 1.496 L (91 in³) 1.496 L (91 in³)
  • Aspiration Naturally Aspirated (NA) Naturally Aspirated (NA)
  • Compression Ratio 22.5:1 22.5:1
  • Rotation from Flywheel End Counterclockwise Counterclockwise
  • Cooling System - Capacity 5.98 L (6.3 qt) 5.98 L (6.3 qt)
  • Lube System - Refill 6 L (6.3 qt) 6 L (6.3 qt)

Power Unit Dimensions - Approximate

  • Height 793 mm (31.2 in) 793 mm (31.2 in)
  • Length 820 mm (32.3 in) 820 mm (32.3 in)
  • Weight - Net Dry - Standard Configuration Without Oil, Cooling, Clutch, Compressor, A/C 175 kg (385.8 lb) 175 kg (385.8 lb)
  • Width 497 mm (19.6 in) 497 mm (19.6 in)

Reliable, Quiet and Durable Power

World-class manufacturing capability and processes coupled with proven core engine designs assure reliability, quiet operation, and many hours of productive life.

Fuel Efficiency

Fuel consumption optimized to match operating cycles of a wide range of equipment and applications while maintaining low operating costs.

Broad Application Range

Industry leading range of factory configurable ratings and options for agricultural, material handling, construction, mining, aircraft ground support, and other industrial applications.


Every Cat engine is manufactured to stringent quality standards in order to assure customer satisfaction.

World-class Product Support Offered Through Global Cat Dealer Network

  • Scheduled maintenance, including SOSSM sample
  • Customer Support Agreements (CSA)
  • Caterpillar Extended Service Coverage (ESC)
  • Superior dealer service network
  • Extended dealer service network through the Cat Industrial Service Distributor (ISD) program

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