Cat® C0.5 Diesel Engine

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Cat® C0.5 Diesel Engine

The Cat® C0.5 Industrial Diesel Engine is offered in ratings ranging from 4.1-6.4 bkW (5.5-8.6 bhp) @ 2000-2800 rpm. These ratings meet U.S. EPA Tier 4 Final emission standards. Ratings: 8.2-10.2 bkW (11.0-13.7 bhp) @ 2800-3600 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 C0.5 engines include: Auxiliary Power Units, Compactors/Rollers, Mobile Earthmoving Equipment, Mobile Light Towers and Turf and Landscaping.

Power Rating

Minimum Power
Maximum Power
Rated Speed
2000-3600 rpm

Emission Standards

For Use in Regions Where Less Than 19 kW Ratings Are Not Required to Meet an Emission Standard


Engine Configuration
In-Line 2, 4-Stroke-Cycle
67 mm (2.64 in)
72 mm (2.83 in)
0.5 L (31 in³)
Naturally Aspirated (NA)
Compression Ratio
Combustion System
Indirect Injection
Rotation (from flywheel end)
Cooling System Capacity
1.1 L (1.16 qt)
Lube System (refill)
1.6-2.0 L (1.7-2.1 qt)

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

407 mm (16 in)
371 mm (14.6 in)
523 mm (20.6 in)
Weight - Net Dry (Basic Operating Engine Without Optional Attachments)
57 kg (126 lb)

Standard Equipment

  • Air Inlet System
    • Inlet manifold with choice of inlets.
  • Control System
    • Alternator 12 volt 14 amp
    • Starter motor 12 volt
    • Glow plug starting aid
  • Cooling System
    • Belt-driven coolant pump
    • Coolant temperature switch
    • Choice of cooling fans
  • Flywheel And Flywheel Housing
    • U.S. EPA Tier 4 Final: Standard backplate flywheel housing and flatface flywheel
  • Fuel System
    • Fuel injection pump
    • Spin-on fuel filter
    • Electronic Shut-off Solenoid (ESOS)
  • Lube System
    • Closed circuit breather
    • Spin-on lube oil filter
    • Lube oil pressure switch
    • Lube oil sump
  • General
    • 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