C1.1 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

Select Units


Cat® C1.1 Industrial Diesel Engines deliver impressive performance throughout a wide speed range with exceptional power density. Their ultra-compact package size and extensive choice of options ensures these engines are ideal for a wide range of small, off road applications. Single-side servicing improves ease of maintenance and lowers overall owner operating costs. 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. C1.1 engines, with ratings: 14.4-18.4 bkW (19.3-24.7 bhp) @ 1800-2800 rpm, meet U.S. EPA Tier 4 Final emission standards. Ratings: 13.7-21.0 bkW (18.4-28.2 bhp) @ 2200-3000 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. This information about Emissions describes the particular rating's emissions technology. For more information about emissions certification, please contact your local Cat dealer.

Power Rating

  • Minimum Power 19.3 BHP 14.4 bkW
  • Maximum Power 28.2 BHP 21.0 bkW
  • Rated Speed 2200-3400 rpm 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. 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 In-Line 3, 4-Stroke-Cycle Diesel
  • Bore 77 mm (3.03 in) 77 mm (3.03 in)
  • Stroke 81 mm (3.19 in) 81 mm (3.19 in)
  • Displacement 1.13 L (69 in³) 1.13 L (69 in³)
  • Aspiration Naturally Aspirated (NA) Naturally Aspirated (NA)
  • Compression Ratio 23:1 23:1
  • Combustion System Indirect Injection Indirect Injection
  • Rotation from Flywheel End Counterclockwise Counterclockwise
  • Cooling System - Capacity 1.9 L (2 qt) 1.9 L (2 qt)
  • Lube System - Refill 3.4-4.4 L (3.6-4.6 qt) 3.4-4.4 L (3.6-4.6 qt)

Engine Dimensions - Approximate

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

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