Cat® C1.1 Industrial Power Unit

Cat® C1.1 Industrial Power Unit

The Cat® C1.1 Industrial Power Unit is offered in ratings ranging from 14.4-18.4 bkW/19.3-24.7 bhp @ 2200-2800 rpm. These ratings meet U.S. EPA Tier 4 Final emission standards. Ratings: 17.3-18.1 bkW (23.2-24.3 bhp) @ 2800-3000 rpm are available for Europe and, depending on applicable emission standards, may be introduced in other regulated areas. Nonroad engines less than 19 kW (25 hp) are not currently subject to EU 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 Power
Maximum Power
Rated Speed
3000 rpm

Emission Standards

14.4-18.4 bkW (19-24.7 bhp) meet U.S. EPA Tier 4 Final. Other ratings available for Europe and other regions.


Engine Configuration
Inline 3, 4-Stroke-Cycle Diesel
77 mm (3.03 in)
81 mm (3.19 in)
1.131 L (69 in³)
Naturally Aspirated (NA)
Compression Ratio
Rotation (from flywheel end)
Cooling System Capacity
5.21 L (5.5 qt)
Lube System (refill)
4.9 L (5.2 qt)

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

778 mm (30.6 in)
438 mm (17.2 in)
730 mm (28.7 in)
Weight - Approximate, Net Dry (Standard configuration without oil, cooling, clutch, compressor, A/C)
129 kg (284 lb)

Standard Equipment

  • Air Inlet System
    • Inlet manifold
  • Control System
    • Alternator 12 volt 65 amp
    • Starter motor 12 volt
    • Glow plug starting aid
  • Cooling System
    • Belt-driven coolant pump
    • Coolant temperature switch
    • Mounted radiator and fan
  • Flywheel And Flywheel Housing
    • SAE No. 6 1/2 flywheel
    • SAE No. 5 flywheel housing
    • U.S. EPA Tier 4 Final: Standard backplate flywheel housing and flatface flywheel
  • Fuel System
    • Fuel injection pump
    • Fuel filter
  • 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)
    • Paint: Caterpillar yellow, with optional colors available at request