Caterpillar C0.5

Caterpillar C0.5 engineThe Caterpillar C0.5 is a 0.5 L (507 cc, 30.94 cu·in) natural aspirated two-cylinders four-stroke liquid-cooled internal combustion vertical diesel engine, manufactured by Caterpillar Inc. for a wide range of small, off road applications.

The Cat C0.5 engine has a two-cylinders, cast-iron cylinder block, overhead valve design, indirect injection fuel system, 12 volts electric starter motor, and 12 Volts (65 amp) alternator. This engine used a belt-driven coolant pump, coolant temperature switch. The lubrication system consists of a closed-circuit breather, spin-on lube oil filter, lube oil pressure switch, and lube oil sump.

The CAT C0.5 engine produced:

  • For auxiliary power and other special applications: 10.3 PS (7.6 kW; 10.2 HP) at 2,800 rpm of maximum output power and 27.0 N·m (2.8 kg·m, 19.9 ft·lb) at 2,800 rpm of peak torque.
  • U.S. EPA Tier 4 Final, EU Stage IIIA emission standards: From 11.2 PS (8.2 KW; 11 HP) at 2,800 rpm to 13.9 PS (10.2 KW; 13.7 HP) at 3,600 rpm of maximum horsepower.

General information

Engine Specifications
Engine model Cat C0.5
Engine type 4-stroke, two-cylinders
Displacement 507 cm3, (30.94 cu·in)
Max. horsepower For auxiliary power and other special applications:
10.3 PS (7.6 kW; 10.2 HP) at 2,800 rpm
U.S. EPA Tier 4 Final, EU Stage IIIA emission standards:
11.2 PS (8.2 KW; 11 HP) at 2,800 rpm – 13.9 PS (10.2 KW; 13.7 HP) at 3,600 rpm
Max. torque For auxiliary power and other special applications:
27.0 N·m (2.8 kg·m, 19.9 ft·lb) at 2,800 rpm
Cooling system Liquid-cooled
Lubricating system Pressure feed
Fuel system Indirect injection
Starting system Starter motor 12V
Charging system Alternator 12V 65 amp
PTO shaft rotation Counterclockwise (from flywheel end)
Dimensions (L x W X H) 407 x 371 x 523 mm (16 x 14.6 x 20.6 in)
Dry weight 57.0 kg (125.7 lbs)

Cylinder Block and Head

It has a 67.0 mm (2.64 in) cylinder bore and 72.0 mm (2.83 in) piston stroke. Compression ratio rating is 23.5:1. The engine used cast iron engine block, cast iron exhaust manifold and inlet manifold with choice of inlets.

Cylinder block
Cylinder block alloy: Cast-iron
Compression ratio: 23.5:1
Cylinder bore: 67.0 mm (2.64 in)
Piston stroke: 72.0 mm (2.83 in)
Crankshaft center distance: 36 mm (1.415 in)
Cylinder head
Cylinder head alloy: Cast-iron
Valve arrangement: OHV
Valves: 2 per cylinder (4 valves in total)

Service Data

The engine oil with a viscosity of SAE 10W-30 is recommended for the C0.5, refilling oil capacity is 1.6-2.0 L (1.70-2.12 US. qt).

Oil system
Lubrication system: Pressure feed
Recommended oil: SAE 10W-30
Oil capacity: 1.6-2.0 L (1.70-2.12 US. qt)
Cooling system
Cooling system: Liquid-cooled
Capacity: 1.1 L (1.16 US. qt)
Fuel system
Type: Indirect injection

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