Cat® C1.7 Diesel Engine

C1.7 Tier 4 Diesel Engines - Highly Regulated


The new electronic Cat® C1.7 Industrial Diesel Engines, with common rail fuel system, deliver impressive performance throughout a wide speed range with exceptional power density. Ultracompact package size and extensive options make them ideal for agriculture, aerial lifts, compressors, construction, general industrial, irrigation equipment, material handling, mobile earthmoving equipment, mobile light towers, turf and landscaping, underground mining equipment, and welders.

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
  • 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

Tier 4 Final Aftertreatment Features

Regeneration Free. The Diesel Oxidation Catalyst (DOC) technology provides customers with an aftertreatment solution that is as compact as possible. The aftertreatment is regeneration-free, providing a seamless operation throughout the work cycle. Mounting. Mounted on-engine, as standard. This will provide the simplest installation and the lowest total cost for the equipment manufacturer. An off-engine option will be offered for some equipment.

  • Standard Equipment
  • Specs

Standard Equipment

  • Air Inlet System
    • Standard air cleaner
    • Turbocharger
  • Control System
    • Alternator 12 volt 85 amp
    • Starter motor 12 volt
    • Glow plug starting aid
    • Electronic control unit
    • Flexible and configurable software features and well supported SAE J1939 CAN bus enables highly integrated machines
    • All connectors and wiring harness are waterproof and designed to withstand harsh non-road environments
    • Robust reliable sensors
  • Cooling System
    • Belt-driven coolant pump
    • Coolant temperature switch
    • Choice of cooling fans
    • Fan drive options
  • Flywheel & Flywheel Housing
    • Flywheel and flywheel housing options
  • Fuel System
    • Electronic 2000 bar common rail fuel system
    • Spin-on fuel filter
    • Simple pintle nozzle injectors
  • Lube System
    • Spin on oil filter
    • Lube oil pressure switch
    • Sump options for various applications
  • Power Take Off (PTO)
    • SAE A PTO drive
  • General
    • Cast iron, engine block
    • Cast iron exhaust manifold options
    • Paint: Caterpillar yellow, with optional colors available at request
    • Induction manifold options
    • Engine mounting
    • Block heater provision
  • U.S. EPA Tier 4 Final Aftertreatment/Clean Emissions Control Equipment
    • Diesel Oxidation Catalyst (DOC)



Long Name:
Cat® C1.7 Diesel Engine

Power Rating

Maximum Power
40.2 HP / 30 kW
Maximum Torque
92 lb-ft @ 1800 rpm / 125 Nm @ 1800 rpm
Rated Speed
2800 rpm
Minimum Power
33.5 HP / 25 kW

Emission Standards

U.S. EPA & CARB Tier 4 Final


Engine Configuration
In-Line 3
3.3 in / 84 mm
3.9 in / 100 mm
103.7 in³ / 1.7 l
Compression Ratio
Turbocharged (T)
Combustion System
Direct Injection
Rotation from Flywheel End

Engine Dimensions - Approximate

25.2 in / 640 mm
21.4 in / 545 mm
28.9 in / 736 mm
Weight - Net Dry - Basic Operating Engine Without Optional Attachments
419 lb / 190 kg

Aftertreatment Dimensions

16 in / 408 mm

Aftertreatment Dimensions*

6.1 in / 155 mm

Aftertreatment Dimensions

12.8 lb / 5.8 kg