Industrial Diesel Engines - Highly Regulated

Cat® C3.4B Diesel Engine

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Overview

Cat® C3.4B Industrial Diesel Engines offer the perfect balance of durability, fuel efficiency and low emissions. The C3.4B Industrial Engine is offered in ratings ranging from 63-90 bkW (84.5-120.7 bhp) @ 2200-2500 rpm, which meet U.S. EPA Tier 4 Final, EU Stage IV emission standards. Industries and applications powered by C3.4B engines include: Agriculture, Aerial Lifts, Aircraft Ground Support, Bore/Drill Rigs, Chippers/Grinders, Compactors/Rollers, Compressors, Construction, Forestry, General Industrial, Irrigation Equipment, Material Handling, Mining, Mobile Earthmoving Equipment, Mobile Light Towers, Mobile Sweepers, Paving Equipment, Pumps, Specialty Ag Equipment, Trenchers, Turf and Landscaping and Underground Mining Equipment.

Power Rating

Minimum Power
84.50 BHP
63.00 bkW
Maximum Power
121.00 BHP
90.00 bkW
Rated Speed
2200 & 2500 rpm

Emission Standards

Emissions
U.S. EPA Tier 4 Final, EU Stage IV Nonroad Emission Standards. U.S. EPA Tier 4 Interim Equivalent and EU Stage IIIB Equivalent ratings available using EPA or EU Flex Provisions.

General

Engine Configuration
In-Line 4, 4-Stroke-Cycle Diesel
Bore
99 mm (3.9 in)
Stroke
110 mm (4.3 in)
Displacement
3.4 L (207.5 in³)
Aspiration
Turbocharged-Aftercooled (TA)
Compression Ratio
17:1
Combustion System
Direct Injection
Rotation from Flywheel End
Counterclockwise
Cooling System Capacity
6 L (6.3 qt)

Engine Dimensions (Approximate. Final dimensions dependent on selected options)

Length
610 mm (24 in)
Width
623 mm (24.5 in)
Height
805.5 mm (31.7 in)

Engine Dimensions - Approximate

Dry Weight - Basic Operating Engine Without Optional Attachments
270 kg (595.2 lbs)

Aftertreatment Dimensions (Approximate. Final dimensions dependent on selected options)

DOC Length
320 mm (12.6 in)
DOC Weight
15 kg (33 lb)
DOC Diameter
196 mm (7.7 in)
SCR Weight
20 kg (44 lb)
SCR Diameter
251 mm (9.88 in)

Aftertreatment Dimensions - Approximate

SCR Length
520 mm (20.47 in)

General

Engine Configuration
In-Line 4, 4-Stroke-Cycle Diesel
Bore
99 mm (3.9 in)
Stroke
110 mm (4.3 in)
Displacement
3.4 L (207.5 in³)
Cooling System - Capacity
6 L (6.3 qt)

Aftertreatment Dimensions - Approximate

DOC Diameter
196 mm (7.7 in)
DOC Length
320 mm (12.6 in)
DOC Weight
15 kg (33 lb)
SCR Diameter
251 mm (9.88 in)
SCR Weight
20 kg (44 lb)

Engine Dimensions - Approximate

Height
805.5 mm (31.7 in)
Length
610 mm (24 in)
Width
623 mm (24.5 in)
Features

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

Leading-edge technology provides significant improvements in power, torque, fuel consumption and response. Technology includes single smart wastegated turbo systems, durable high pressure common rail technology, and closed circuit breathing system.

Fuel Efficiency

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

Fuel & Oil

Tier 4 Interim or Tier 4 Final, Stage IIIB or Stage IV engines require Ultra Low Sulfur Diesel (ULSD) fuel containing a maximum of 15 ppm sulfur, and new oil formulations to support the new technology. Cat engines are designed to accommodate B20 biofuel. 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.

Standard Equipment
  • Air Inlet System
    • Induction manifolds
    • Exhaust manifolds
  • Control System
    • Starter motor
    • Alternator
    • Electronic Control Unit
    • Sensors for: engine speed, oil pressure, and coolant temperature
  • Cooling System
    • Cooling packs
  • Flywheels and Flywheel Housing
    • Flywheel housings
    • Flywheel and starter rings
  • Fuel System
    • Fuel filter positions
    • Common rail fuel pump and injectors
  • Lube System
    • Lubricating oil filters
  • General
    • Cold start capability to -20° C (-4° F)
    • Paint: Caterpillar yellow, with optional colors available at request
  • U.S. EPA Tier 4 Final, EU Stage IV Aftertreatment/ Clean Emissions Control Equipment
    • Diesel Oxidation Catalyst (DOC)
    • Selective Catalytic Reduction (SCR)
    • SCR Auxiliaries