C1.1 China NR4

C1.1 NA and T China Nonroad IV

C1.1 China NR4


The C1.1 and C1.1T are indirect injection industrial diesel engines meeting China Nonroad Stage IV emission standards without the need for electronic control, aftertreatment or exhaust gas recirculation. Available as naturally aspirated or turbocharged for improved low speed torque, we also offer a range of factory configurable options to minimize the cost of machine development and of manufacturing if equipped with e-controller


  • Reliable Power

    Manufactured in some of the world's most modern and highly automated production facilities, the Cat® C1.1 is proven to
    deliver durable power and offers a wide range of customization options that refuse to compromise quality and durablity.

  • Compact Size

    With a 16.1-21 kW (21.6-28.2 hp) power rating, the C1.1 and the C1.1 turbo allows OEMs to consider different
    installation, operating and commercial requirements. These models are particularly adapted to machines where power
    from a small package is crucial. And for jobs that require that extra bit of power, there's a turbocharged option that
    delivers in almost any condition, at any altitude.

  • Quiet Work

    The stiff block and indirect injection system make this a quiet engine, minimizing operator fatigue and saving money forOEMs in sound attenuation measures.

  • Standard Equipment
  • Specs
  • Docs

Standard Equipment

  • Air inlet system
    • Inlet manifold with choice of inlets
  • Air Inlet System
    • Inlet manifold with choice of inlets.
  • Control System
    • Alternator 12 volt 65 amp
    • Starter motor 12 volt
    • Glow plug starting aid
  • Cooling System
    • Belt-driven coolant pump
    • Coolant temperature switch
  • Flywheel and Flywheel Housing
    • SAE No. 6 1/2 flywheel
    • Choice of SAE No. 5 or standard backplate flywheel housing
    • U.S. EPA Tier 4 Final: Standard backplate flywheel housing and flatface flywheel
  • Fuel System
    • Fuel injection pump
    • Spin-on fuel filter
  • Lube System
    • Low profile oil pan
    • Spin-on lube oil filter
    • Lube oil pressure switch
  • Power Take Off (PTO)
    • Provision for Power Take Off (PTO)
  • General
    • Cast iron, engine block
    • Cast iron exhaust manifold--side outlet
    • Cold start capability to -20° C (-4° F)
    • Paint: Caterpillar yellow, with optional colors available at request



Long Name:
C1.1 NA and T China Nonroad IV
C1.1 China NR4

Power Rating

Maximum Power
28.2 HP / 21 kW
Maximum Torque
63.4 lb/ft / 86 N·m
Rated Speed
3400 rpm
Minimum Power
21.6 HP / 16.1 kW

Emission Standards

China Nonroad Stage IV


Engine Configuration
3 in / 77 mm
3.2 in / 81 mm
67.1 in³ / 1.1 l
Compression Ratio
Naturally aspirated (NA)/turbocharged (T)
Combustion System
indirect injection
Rotation from Flywheel End

Engine Dimensions - Approximate

19.3 in / 491 mm
15.8 in / 400 mm
22.7 in / 576 mm
Weight - Net Dry - Basic Operating Engine Without Optional Attachments
211 lb / 96 kg