The Caterpillar C1.5 is a 1.5 L (1,496 cc, 91.29 cu·in) natural aspirated or turbocharged three-cylinders four-stroke liquid-cooled internal combustion vertical diesel engine, manufactured by Caterpillar Inc. for general-purpose applications.
The Cat C1.5 engine has a three-cylinders, cast-iron cylinder block, overhead valve design, indirect injection fuel system, 12 volts electric starter motor, and 12 Volts (65 amp) alternator and glow plug starting aid. This engine used a belt-driven coolant pump and 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.
Naturally aspirated version of the CAT C1.5 engine produced:
- EU Stage IIIA emission standards: From 28.4 PS (20.9 kW; 28.0 HP) at 2,200 rpm to 34.1 PS (25.1 kW; 33.7 HP) at 3,000 rpm of maximum output power and 79.9 N·m (8.1 kg·m, 58.9 ft·lb) at 3,000 rpm of torque.
- U.S. EPA Tier 4 Final emission standards: 24.9 PS (18.4 kW; 24.7 HP) at 2,100 rpm.
- U.S. EPA Tier 4 Interim emission standards: From 28.2 PS (20.7 KW; 27.8 HP) at 2,200 rpm to 34.1 PS (25.1 KW; 33.7 HP) at 3,000 rpm of peak horsepower.
Turbocharged version of the C1.5 engine produced:
Power unit C1.5 produced:
- EU Stage IIIA emission standards: 34.1 PS (25.1 kW; 33.7 HP) at 3,000 rpm.
- U.S. EPA Tier 4 Final emission standards: 36.7 PS (27.0 KW; 36.2 HP) at 2,800 rpm
- U.S. EPA Tier 4 Interim emission standards: 32.9 PS (24.2 KW; 32.5 HP) at 3,000 rpm
General information
| Engine Specifications | |
| Engine model | Cat C1.5 |
| Engine type | 4-stroke, OHV, three-cylinders |
| Displacement | 1,496 cm3, (91.29 cu·in) |
| Max. horsepower |
Naturally aspirated EU Stage IIIA: 28.4 PS (20.9 kW; 28.0 HP) at 2,200 rpm to 34.1 PS (25.1 kW; 33.7 HP) at 3,000 rpm U.S. EPA Tier 4 Final: 24.9 PS (18.4 kW; 24.7 HP) at 2,100 rpm U.S. EPA Tier 4 Interim: 28.2 PS (20.7 KW; 27.8 HP) at 2,200 rpm to 34.1 PS (25.1 KW; 33.7 HP) at 3,000 rpm Turbocharged Power unit |
| Max. torque | 79.9 N·m (8.1 kg·m, 58.9 ft·lb) at 3,000 rpm |
| Cooling system | Liquid-cooled |
| Lubricating system | Pressure feed |
| Fuel system | Indirect injection |
| Fuel used | Unleaded gasoline (octane number 86 or higher) |
| Starting system | Starter motor 12V |
| PTO shaft rotation | Counterclockwise (from PTO shaft side) |
| Dimensions (L x W X H) |
Engine: 572 x 453 x 643 mm (22.5 x 17.8 x 25.3 in) Engine (Turbo version): 572 x 512 x 643 mm (22.5 x 20.2 x 25.3 in) Power unit: 820 x 497 x 793 mm (32.3 x 19.6 x 31.2 in) |
| Dry weight |
Engine: 149.0 kg (328.5 lbs) Engine (Turbo version): 156.5 kg (345.0 lbs) Power unit: 175.0 kg (385.8 lbs) |
Cylinder Block and Head
Cylinder bore and piston stroke are 84.0 mm (3.31 in) and 90.0 mm (3.54 in), respectively. Compression ratio rating is 22.5:1. The engine used cast iron engine block and cast iron exhaust manifold.
| Cylinder block | |
| Compression ratio: | 22.5:1 |
| Cylinder bore: | 84.0 mm (3.31 in) |
| Piston stroke: | 90.0 mm (3.54 in) |
| Crankshaft center distance: | 45 mm (1.77 in) |
| Cylinder head | |
| Valve arrangement: | OHV, belt driven |
| Valves:: | 2 per cylinder,(6 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 6.0 L (6.34 US. qt, 5.28 Imp. qt.).
| Oil system | |
| Lubrication system: | Pressure feed |
| Oil capacity: | 6.0 L (6.34 US. qt, 5.28 Imp. qt.) |
| Cooling system | |
| Cooling system: | Liquid-cooled |
| Capacity: | 2.6 L (2.75 U.S. qts) |
| Fuel system | |
| Type: | Indirect injection |
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