Cat® C1.1 Diesel Engine

Cat® C1.1 Diesel Engine

The C1.1 Industrial Diesel Engine is offered in ratings ranging from 13.7-21.0 bkW (18.4-28.2 bhp) @ 2200-3000 rpm. These ratings meet EPA Tier 4 Final emission standards. They are also available for Europe and, depending on applicable emission standards, may be introduced in other regulated and non-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 and Underground Mining Equipment.

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Power Rating

Minimum Power
Maximum Power
Rated Speed
2200-3400 rpm

Emission Standards

U.S. EPA Tier 4 Interim Equivalent. Nonroad engines less than 19 kW (25 hp) are not currently subject to EU emission standards.


Engine Configuration
Inline 3, 4-Stroke-Cycle Diesel
77 mm (3.03 in)
81 mm (3.19 in)
1.13 L (69 in³)
Naturally Aspirated (NA)
Compression Ratio
Combustion System
Indirect Injection
Rotation (from flywheel end)
Lube System (refill)
3.4-4.4 L (3.6-4.6 qt)

Engine Dimensions (Approximate. Final dimensions dependent on selected options)

491 mm (19.33 in)
400 mm (15.7 in)
576 mm (22.7 in)
Weight, Net Dry (Basic Operating Engine Without Optional Attachments)
87 kg (191 lb)

Standard Equipment

  • Air Inlet System
    • Inlet manifold with choice of inlets.
  • Control System
    • Alternator 12 volt 40 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
  • Fuel System
    • Fuel injection pump
    • Spin-on fuel filter
    • Electronic Shut-off Solenoid (ESOS)
  • Lube System
    • Low profile oil pan
    • Spin-on lube oil filter
    • Lube oil pressure switch
  • General
    • Cast iron, engine block
    • Cast iron exhaust manifold--side outlet
    • Paint: Caterpillar yellow, with optional colors available at request