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Maximum Power121 HP (90 kW)
Maximum Torque369 lb-ft @ 1500 rpm (500 Nm @ 1500 rpm)
EmissionsUN ECE R96 Stage IIIA, Brazil MAR-1
Rated Speed2200-2400 rpm
The Cat® C3.6 agricultural tractor engine offers the perfect balance of compact size, reliability, and performance. This engine is offered in ratings ranging up to 90 kW (121 hp) @ 2400 rpm.

The C3.6 is designed to meet the specific requirements of agricultural tractors including structural sump with integral twin balancer shafts.

The C3.6 meets UN ECE R96 Stage IIIA and Brazil MAR-1 emission standards.


Maximum Power121 HP (90 kW)
Maximum Torque369 lb-ft @ 1500 rpm (500 Nm @ 1500 rpm)
EmissionsUN ECE R96 Stage IIIA, Brazil MAR-1
Rated Speed2200-2400 rpm
Length26.8 in (681 mm)
Minimum Power74 HP (55 kW)
Engine ConfigurationInline 4, 4-Stroke-Cycle Diesel
Bore3.9 in (98 mm)
Stroke4.7 in (120 mm)
Displacement220 in³ (3.6 l)
Compression Ratio17.0:1
AspirationTurbocharged Aftercooled (TA)
Combustion SystemDirect Injection
Rotation from Flywheel EndCounterclockwise
Width22.2 in (564 mm)
Height33.7 in (855 mm)
Weight - Net Dry - Basic Operating Engine Without Optional Attachments840 lb (381 kg)

Benefits and Features

Meets R96 Stage IIIA and Brazil MAR-1

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

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

Industry leading range of factory configurable ratings and options to enable a solution for your machine.

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.

  • Scheduled maintenance, including SOS℠ sample
  • Customer 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

  • Starter motor (12V)
  • Alternator (12V)
  • Electronic Control Unit (chassis mounted)
  • Engine control sensors and robust wiring harness
  • Data interface via CANbus SAE J1939
  • Agricultural back plate for transmission mounting
  • Choice of flywheel to match industry common hydraulic pumps and transmissions
  • Side PTO with SAE A or SAE B interface
  • Fuel filter - chassis mounted
  • With water sensor
  • Lubricating oil filters
  • High incline oil pan - 25 degrees continuous in all directions
  • Cold start capability to -25° C (-13° F)
  • Paint: Caterpillar yellow, with optional colors available at request