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The Cat® C4.4 Industrial Diesel Engine is offered in ratings ranging from 74-129.4 bkW (99-173.5 bhp) @ 2200 rpm, which meet U.S. EPA Tier 4 Final, EU Stage IV emission standards. U.S. EPA Tier 4 Interim equivalent and EU Stage IIIB equivalent ratings are also available using U.S. EPA and EU Flex provisions.
Features At A Glance
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
Series turbocharging with smart wastegate available on specific ratings for fast response, high power, and increased torque.
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.
Package Size
Ideal for equipment with narrow engine compartments. Multiple installation options minimize total package size.
Low Cost Maintenance
Worldwide service delivers ease of maintenance and simplifies the servicing routine. Hydraulic tappets, multi-vee belts, "no ash service" aftertreatment, and 500-hour oil change intervals enable low-cost maintenance. Many service items have a choice of location on either side of the engine to enable choice of service access. The S·O·SSM program is available from your Cat dealer to determine oil change intervals and provide optimal performance.
Quality
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 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 Interim, Stage IIIB Aftertreatment Features
Regeneration. Passive regeneration completely transparent to the operator.Mounting. Extensive range of inlets and outlets, as well as remote off- and on-engine installations, provide flexibility for many installations.Service. Service-free DPF for the emissions life of the engine.
Tier 4 Final, Stage IV Aftertreatment Features
Regeneration. The DOC/SCR modular design offers a simple, compact package while providing high levels of performance. A DOC/DPF/SCR option is available for higher power machines. While in use, both DOC/SCR an DOC/DPF/SCR systems offer transparent operation to the user.Mounting. Extensive range of inlets and outlets, as well as remote and on-engine installations, provide flexibility for many installations.Service. Both DOC/SCR an DOC/DPF/SCR systems are service-free for the emissions life of the engine. Available in 12V or 24V systems
Full electronic control system, all connectors and wiring looms waterproof and designed to withstand harsh off-highway environments
Flexible and configurable software features and well-supported SAE J1939 CAN bus enables highly integrated machines
Cooling System
Top tank temperature 108° C (226° F) as standard to minimize cooling pack size
50:50 water glycol mix
Flywheels and Flywheel Housing
Wide choice of drivetrain interfaces, including SAE No. 2 and SAE No. 3 configurations
Fuel System
Electronic high pressure common rail
Innovative filter design to ensure maximum protection of the engine
Lube System
Wide choice of sumps for different applications
Power Take Off
SAE A and SAE B flanges on left-hand side. Additional SAE A flange available on left-hand side. Engine power can also be taken from the front of the engine on some applications. Factory fitted compressors are also available.
General
Available with or without a balancer
Paint: Caterpillar yellow, with optional colors available at request
U.S. EPA Tier 4 Interim Equivalent, EU Stage IIIB Equivalent Aftertreatment / Clean Emissions Control Equipment
Clean Emissions Module (CEM), consisting of Diesel Particulate Filter (DPF) and Diesel Oxidation Catalyst (DOC)
No ash service requirement
Passive regeneration
U.S. EPA Tier 4 Final, EU Stage IV Aftertreatment/ Clean Emissions Control Equipment
Clean Emissions Module (CEM), consisting of Diesel Particulate Filter (DPF) and Diesel Oxidation Catalyst (DOC)
Selective Catalytic Reduction (SCR)
3" flex pipe connection with straight, 45°, and 90° options for flexibility
See how C4.4 compares against frequently compared products.
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