The Cat® C1.1 Industrial Diesel Engine is offered in ratings ranging from 14.4-18.4 bkW (19.3-24.7 bhp) @ 1800-2800 rpm. These ratings meet U.S. EPA Tier 4 Final emission standards. Ratings: 13.7-21.0 bkW (18.4-28.2 bhp) @ 2200-3000 rpm are also 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. Industries and applications powered by C1.1 engines include: Aircraft Ground Support, Auxiliary Power Units, Bore/Drill Rigs, Chippers/Grinders, Compactors/Rollers, Construction, Forestry, General Industrial, Material Handling, Mining, Mobile Earthmoving Equipment, Mobile Light Towers, Pumps, Trenchers, Underground Mining Equipment.


Power Rating
Minimum Power 19.3 BHP
Maximum Power 28.2 BHP
Rated Speed 2200-3400 rpm

Emission Standards
Emissions 14.7-18.4 bkW (19.7-24.7 bhp) meet U.S. EPA Tier 4 Final. Other ratings available for Europe and other regions.

Engine Configuration In-Line 3, 4-Stroke-Cycle Diesel
Bore 77 mm (3.03 in)
Stroke 81 mm (3.19 in)
Displacement 1.13 L (69 in³)
Aspiration Naturally Aspirated (NA)
Compression Ratio 23:1
Combustion System Indirect Injection
Rotation from Flywheel End Counterclockwise
Cooling System - Capacity 1.9 L (2 qt)
Lube System - Refill 3.4-4.4 L (3.6-4.6 qt)

Engine Dimensions - Approximate
Height 576 mm (22.7 in)
Length 491 mm (19.33 in)
Weight - Net Dry - Basic Operating Engine Without Optional Attachments 87 kg (191 lb)
Width 400 mm (15.74 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.

High Performance

Delivers impressive performance throughout a wide speed range while maintaining low operating costs.

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.

Package Size

Ultra-compact package size ensures ease of installation as well as exceptional power density.

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

Standard Equipment

Air Inlet System
  • Inlet manifold with choice of inlets.
Control System
  • Alternator 12 volt 65 amp
  • Starter motor 12 volt
  • Glow plug starting aid
Cooling System
  • Belt-driven coolant pump
  • Coolant temperature switch
Flywheel and Flywheel Housing
  • SAE No. 6 1/2 flywheel
  • Choice of SAE No. 5 or standard backplate flywheel housing
  • U.S. EPA Tier 4 Final: Standard backplate flywheel housing and flatface flywheel
Fuel System
  • Fuel injection pump
  • Spin-on fuel filter
Lube System
  • Low profile oil pan
  • Spin-on lube oil filter
  • Lube oil pressure switch
Power Take Off (PTO)
  • Provision for Power Take Off (PTO)
  • 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

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