Cat® C4.4 Diesel Engine

Cat® C4.4 Industrial Diesel Engines offer the perfect balance of durability, fuel efficiency and low emissions. Extensively tested on the job, these engines use a range of common rail fuel systems and advanced control systems to deliver maximum uptime in the harshest environment. They have proven they can handle the toughest applications and deliver superior performance that exceeds the expectations of the most demanding users. Industries and applications powered by C4.4 engines include: Agriculture, Aerial Lifts, Aircraft Ground Support, Bore/Drill Rigs, Chippers/Grinders, Compactors/Rollers, Compressors, Construction, Cranes, Crushers, Feller Bunchers, Forestry, Forklifts, General Industrial, Harvesters, Hydraulic Power Units, Irrigation Equipment, Loaders/Forwarders, Material Handling, Mining, Mobile Earthmoving Equipment, Mobile Sweepers, Paving Equipment, Pumps, Skidders, Specialty Ag Equipment, Sprayers, Trenchers, Turf and Landscaping and Underground Mining Equipment.

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Specs
Standard

Maximum Power	173.5 HP
Maximum Torque	553 lb-ft @ 1400 rpm
Rated Speed	2200 rpm
Minimum Power	93.9 HP

Emissions	U.S. EPA & CARB Tier 4 Final

Engine Configuration	Inline 4
Bore	4.1 in
Stroke	5 in
Displacement	268.5 in³
Compression Ratio	16.5:1
Aspiration	Turbocharged Aftercooled (TA) or Series Turbocharged Aftercooled (TTA)
Combustion System	Direct Injection
Rotation from Flywheel End	Counterclockwise
Aftertreatment	DOC+SCR or DOC+DPF+SCR

Length	33.3 in
Width	29.1 in
Height	34.1 in
Weight - Net Dry - Basic Operating Engine Without Optional Attachments	926 lb

Length	26.5 in
Width	18.8 in
Height	15.3 in
Weight	99 lb

Diameter	10.6 in

Air Inlet System

Standard air cleaners

Control System

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

Cat® C4.4 Diesel Engine

Power Rating

Emission Standards

General

Engine Dimensions - Approximate

Aftertreatment Dimensions

Aftertreatment Dimensions*

Air Inlet System

Control System

Cooling System

Flywheels and Flywheel Housing

Fuel System

Lube System

Power Take Off

General

U.S. EPA Tier 4 Interim Equivalent, EU Stage IIIB Equivalent Aftertreatment / Clean Emissions Control Equipment

U.S. EPA Tier 4 Final, EU Stage IV Aftertreatment/ Clean Emissions Control Equipment