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    Cat® C4.4 Diesel Engine
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    Cat® C4.4 Industrial Power Unit
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    Cat® C27 Industrial Power Unit
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    Cat® C18 Industrial Power Unit (<560 kW)
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    Power Rating
    Maximum Power 111.3 HP 129.4 HP 950 HP 630 HP
    Maximum Torque 308 lb-ft @ 1400 rpm - 3211 lb-ft @ 1200 rpm 2177 lb-ft @ 1300 rpm
    Rated Speed 2200-2400 rpm 2200 rpm 1800 rpm 1800-2000 rpm
    Minimum Power 72.4 HP 129.4 HP 800 HP 575 HP

    Emission Standards
    Emissions UN ECE R96 Stage IIIA China Nonroad Stage III, Brazil MAR-1, UN ECE R96 Stage IIIA U.S. EPA Tier 4 Final, EU Stage V U.S. EPA Tier 4 Final, EU Stage V, China Nonroad Stage IV

    Engine Dimensions - Approximate
    Length 26.1 in - - -
    Width 23.7 in - - -
    Height 30.5 in - - -
    Weight - Net Dry - Basic Operating Engine Without Optional Attachments 674.6 lb - - -

    General
    Engine Configuration Inline 4, 4-Stroke-Cycle Diesel Inline 4, 4-Stroke-Cycle Diesel V-12, 4-Stroke-Cycle Diesel Inline 6, 4-Stroke-Cycle Diesel
    Bore 4.1 in 4.1 in 5.7 in 5.7 in
    Stroke 5 in 5 in 6 in 7.2 in
    Displacement 269 in³ 268.5 in³ 1649.5 in³ 1104.5 in³
    Compression Ratio 18.2:1 16.2:1 16.0:1 16.0:1
    Aspiration Naturally Aspirated (NA), Turbocharged (T) or Turbocharged Aftercooled (TA) Turbocharged Aftercooled (TA) Twin Turbocharged-Aftercooled (TTA) Turbocharged Aftercooled (TA)
    Combustion System Direct Injection - - -
    Rotation from Flywheel End Counterclockwise Counterclockwise Counterclockwise Counterclockwise
    Aftertreatment - - DOC DOC+DPF+SCR

    Power Unit Dimensions
    Length - 53.5 in - 99.7 in
    Width - 29.5 in - 48.9 in
    Height - 37.9 in - 79 in
    Weight - 1146 lb - 5842 lb

    Aftertreatment Dimensions
    Width - - - 43.8 in
    Height - - - 25.7 in
    Weight - - - 591 lb

    Aftertreatment Dimensions*
    Diameter - - - 13 in

    PETU Dimensions - Tier 4 Final Only
    Length - - - 33.6 in
    Width - - - 11.3 in
    Height - - - 21.7 in
    Weight - - - 42.8 lb
    Volume Capacity - - - 51.1 qt (US)
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