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Industrial Diesel Engines - Lesser Regulated & Non-Regulated

Cat® industrial engines are ready for your application. These engines deliver the unsurpassed reliability, durability, fuel efficiency, and low cost of ownership you have come to expect from Caterpillar. And our world-class product support will never let you down. All this adds up to a powerful advantage for you. Every Cat industrial diesel and gas engine comes with 75 years of engine experience. Our world-class product line of high-speed and medium-speed industrial engines in a wide range of applications offer power solutions for the most demanding installations and the harshest environments. With power options from 8.2 to 6,100 bkW (11 to 8,180 bhp), Cat industrial diesel and gas engines offer the widest power range in the industry.

Cat® C1.5 Diesel Engine

The Cat® C1.5 Industrial Diesel Engine is offered in ratings ranging from 20.9-30 bkW (28-40.2 bhp) @ 2200-3000 rpm. These ratings meet EU Stage IIIA emission standards. Applications powered by C1.5 engines include: Agriculture Tractors, Combines and Harvesters, Aircraft Ground Support, Bore/Drill Rigs, Chippers, Grinders, Compactors, Rollers, Compressors, Construction, Irrigation, Pumps, Turf, Landscaping, Mobile Earthmoving, Paving, Trenchers, Underground Mining, and Material Handling.

Product Details

Power Rating

Minimum Power 20.9 bkW
Maximum Power 30 bkW
Rated Speed 2200-3000 rpm

Emission Standards

Emissions U.S. EPA Tier 4 Interim Equivalent


Engine Configuration Inline 3, 4-Stroke-Cycle Diesel
Bore 84 mm (3.3 in)
Stroke 90 mm (3.5 in)
Aspiration Naturally Aspirated (NA) or Turbocharged (T)
Displacement 1.496 L (91 in³)
Compression Ratio 22.5:1
Combustion System Indirect Injection
Rotation from Flywheel End Counterclockwise
Lube System - Refill 6 L (6.3 qt)

Engine Dimensions - Approximate

Height 643 mm (25.3 in)
Length 572 mm (22.5 in)
Weight - Net Dry - Basic Operating Engine Without Optional Attachments 149-156.5 kg (328-345 lb)
Width 453-512 mm (17.8-20.2 in)
  • Air Inlet System
    •  Inlet manifold with choice of inlets.
  • Inlet manifold with choice of inlets.
    • Control System
      •  Alternator 12 volt 65 amp
      •  Starter motor 12 volt
      •  Glow plug starting aid
      •  Tier 4 Final: Alternator 12V 85 amp
    • Cooling System
      •  Belt-driven coolant pump
      •  Coolant temperature switch
      •  Choice of cooling fans
    • Flywheel & Flywheel Housing
      •  Naturally Aspirated: SAE No. 7 1/2 flywheel
      •  Turbocharged: SAE No. 6 1/2 or SAE No. 7 1/2 flywheel
      •  EPA Tier 4 Final Turbocharged: SAE No. 7 1/2 flywheel
      •  Naturally Aspirated: Choice of SAE No. 4 or standard backplate flywheel housing
      •  Turbocharged: Choice of SAE No. 4 or SAE No. 5 or standard backplate flywheel housing
      •  Tier 4 Final Turbocharged: Choice of SAE No. 4 or SAE No. 5 or standard backplate flywheel housing
    • Fuel System
      •  Fuel injection pump
      •  Spin-on fuel filter
      •  Electronic Shut-off Solenoid (ESOS)
    • Lube System
      •  Alternative oil fillers
      •  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

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