The Cat® C3.6 Industrial Diesel Engines offer the perfect balance of compact size, reliability, and performance. This engine is offered in ratings ranging up to 100 bkW (134 bhp) @ 2200 rpm. The C3.6 is designed to meet the needs of many industries and applications, including agricultural tractors, aircraft ground support, bore/drill rigs, chippers/grinders, compactors/rollers, compressors, forestry, irrigation equipment, material handling, mining, earthmoving equipment, paving equipment, pumps, fruit harvesters equipment, turf and underground mining equipment.

Power Rating
Minimum Power 74 BHP
Maximum Power 134 BHP
Rated Speed 2000-2400 rpm

Emission Standards
Emissions U.S. EPA Tier 4 Final Nonroad Emission Standards. Also designed to meet proposed EU Stage V Nonroad Emission Standards.

Engine Configuration In-Line 4, 4-Stroke-Cycle Diesel
Bore 98 mm (3.9 in)
Stroke 120 mm (4.7 in)
Displacement 3.6 L (220 in³)
Aspiration Turbocharged-Aftercooled (TA)
Compression Ratio 17:1
Combustion System Direct Injection
Rotation from Flywheel End Counterclockwise
Cooling System - Capacity 4 L (1.06 qt)

Aftertreatment Dimensions - Approximate
DOC Diameter TBA
DOC Length TBA
DOC Weight TBA
SCR Diameter TBA
SCR Length TBA
SCR Weight TBA

Engine Dimensions - Approximate
Dry Weight - Basic Operating Engine Without Optional Attachments 275 kg (606 lbs)
Height 776 mm (30.6 in)
Length 667 mm (26.3 in)
Width 569 mm (22.4 in)


Meets U.S. EPA Tier 4 Final Nonroad emission standards. Designed to meet proposed EU Stage V Nonroad emission standards. As of publishing date, Stage V regulations have not been finalized.

Reliable, Quiet and Durable Power

World-class manufacturing capability and processes coupled with proven technologies and extensive field validation assure reliability and durability in tough nonroad applications.

High Performance

Leading edge fuel systems and turbocharging provide high torque even at lower engine speeds.

Fuel Efficiency

Fuel consumption optimized to match the measured operating cycles of a wide range of equipment types.

Fuel & Oil

U.S. EPA Tier 4 Interim or Tier 4 Final, EU Stage IIIB, Stage IV or proposed Stage V engines require Ultra Low Sulfur Diesel (ULSD) fuel containing a maximum of 10 ppm sulfur (EU) and 15 ppm sulfur (U.S.), and new oil formulations to support the new technology. Your Cat dealer can provide more information regarding fuel and oil.

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.

Low Cost Maintenance

Worldwide service delivers ease of maintenance and simplifies the servicing routine. Capable of optimal oil change intervals of 500 hours. The S•O•S℠ program is available from your Cat dealer to determine oil change intervals and provide optimal performance.


Every Cat engine is manufactured to stringent quality standards in order to assure customer satisfaction.

World-class Product Support Offered Through Global Cat Dealer Network

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

U.S. EPA Tier 4 Final, Proposed EU Stage V Aftertreatment Features

Technology – The DOC, DPF and SCR technology provides customers with a solution which meets the emissions standards while providing optimal fuel consumption and transient response. For power ratings below 56 bkW (75 bhp), the SCR is not required. Mounting – On engine aftertreatment offered for best value and simplest OEM design and manufacturing processes. Remote mount alternatives are also available.

Standard Equipment

Control System
  • Starter motor (12V or 24V)
  • Alternator (12V or 24V)
  • Electronic Control Unit (chassis mounted)
  • Engine control sensors and robust wiring harness
  • Data interface via CANbus J1939
Flywheels and Flywheel Housing
  • Flywheel housings – SAE 3 or SAE 4
  • Choice of flywheel to match industry common hydraulic pumps and transmissions
  • Side PTO with SAE A or SAE B interface
Fuel System
  • Fuel filter – preconnected but chassis mounted
  • With water sensor
Lube System
  • Lubricating oil filters
  • High incline oil pan – 35° continuous in all directions
  • Cold start capability to -20° C (-4° F) with standard equipment
  • Paint: Caterpillar yellow, with optional colors available at request
U.S. EPA Tier 4 Final, proposed EU Stage V Aftertreatment/ Clean Emissions Control Equipment
  • Diesel Oxidation Catalyst (DOC)
  • Selective Catalytic Reduction (SCR)
  • SCR Auxiliaries

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