The Cat® C1.5 Industrial Diesel Engine is offered in ratings ranging from 18.4-27.6 bkW (24.7-37.0 bhp) @ 1800-3000 rpm and meet U.S. EPA Tier 4 Final emission standards. Ratings: 20.9-30.0 bkW (28.0-40.2bhp) @ 2200-3000 rpm meet EU Stage IIIA emission standards and are also available in Europe and other regions. Industries and applications powered by C1.5 engines include: Aircraft Ground Support, Auxiliary Power Units, Bore/Drill Rigs, Chippers and Grinders, Compactors/Rollers, Construction, Forestry, General Industrial, Material Handling, Mining, Mobile Earthmoving Equipment, Mobile Light Towers, Pumps, Trenchers, Turf and Landscaping, Underground Mining Equipment and Welders.

Power Rating
Minimum Power 24.7 BHP
Maximum Power 24.7 BHP
Rated Speed 2100-3000 rpm

Emission Standards
Emissions U.S. EPA Tier 4 Final or EU Stage IIIA

Engine Configuration In-Line 3, 4-Stroke-Cycle Diesel
Bore 84 mm (3.3 in)
Stroke 90 mm (3.5 in)
Displacement 1.496 L (91 in³)
Aspiration Naturally Aspirated (NA) or Turbocharged (T)
Compression Ratio 22.5:1
Combustion System Indirect Injection
Rotation from Flywheel End Counterclockwise
Cooling System - Capacity 2.6 L (2.75 qt)
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 (328.5-345 lb)
Width 453-512 mm (17.8-20.2 in)

Aftertreatment Dimensions - Approximate
Diameter 170 mm (6.7 in) (Tier 4 Final only)
Length 449 mm, 17.6 in (Tier 4 Final only)
Weight 13 kg (28.7 lb) (Tier 4 Final, >19 kW/25 hp only)

Reliable, Quiet and Durable Power

World-class manufacturing capability and processes coupled with proven core engine designs assure reliability, quiet operation, and many hours of productive life.

High Performance

Substantial torque rise delivers impressive performance throughout a wide speed range while maintaining low operating costs.

Fuel Efficiency

Fuel consumption optimized to match operating cycles of a wide range of equipment and applications while maintaining low operating costs.

Broad Application Range

Industry leading range of factory configurable ratings and options for agricultural, material handling, construction, mining, aircraft ground support, and other industrial applications.

Package Size

Ultra-compact package size ensures ease of installation as well as exceptional power density.

World-class Product Support Offered Through Global Cat Dealer Network

  • Scheduled maintenance, including SOSSM sample
  • Cutsomer Support Agreements (CSA)
  • Caterpillar Extended Service Coverage (ESC)
  • Superior dealer service network
  • Extended dealer service network through the Cat Industrial Service Distributor (ISD) program

Standard Equipment

Air Inlet System
  • 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
  • Naturally Aspirated: Choice of SAE No. 4 or standard backplate flywheel housing
  • Turbocharged: SAE No. 6 1/2 or SAE No. 7 1/2 flywheel
  • Turbocharged: Choice of SAE No. 4 or SAE No. 5 or standard backplate flywheel housing
  • EPA Tier 4 Final Turbocharged: SAE No. 7 1/2 flywheel
  • 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
Power Take Off (PTO)
  • Provision for Power Take Off (PTO)
  • Cast iron, engine block
  • Cast iron exhaust manifold--side outlet
  • Cold start capability to -20° C (-4° F)
  • Gradeability 35° continuous
Tier 4 Final Aftertreatment / Clean Emissions Control Equipment)
  • Diesel Particulate Filter (DPF)
  • Diesel Oxidation Catalyst (DOC)
  • Passive Regeneration System with Backup

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