Maintenance schedule
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Oil | — | 500 hr |
Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.
The Perkins 1104D-44T is a 4.4 L 4-cylinder turbocharged engine rated at 2200 rpm, producing up to 68.8 kW. It powers generator sets from Perkins, including the 1104D-44T IOPU. It holds 7.9 L (2.1 gal) of oil and 17 L (4.5 gal) of coolant.
Also known as: Perkins 1104D-44T
Part of the Perkins 1104D engine family — 16 variants share parts & fitment.
| Oil capacity | 7.9 L |
|---|---|
| Coolant capacity | 17.0 L |
| Displacement | 4.4 L |
| Cylinders | 4 |
| Aspiration | Turbocharged |
| Rated speed | 2200 rpm |
| Gross power | 68 kW |
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Oil | — | 500 hr |
Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.
| Part # | Description | Category |
|---|---|---|
| 125562 | Air Filter - Secondary | air_filter |
| 8C-3601 | Air Filter | air_filter |
| LLB1114B | Leroy Somer | alternator |
| LLB1114D | Leroy Somer | alternator |
| LLB1114F | Leroy Somer | alternator |
| LLB1114L | Leroy Somer | alternator |
| LLB1114M | Leroy Somer | alternator |
| LLB1514J | Leroy Somer | alternator |
| LLB1514P | Leroy Somer | alternator |
| LLB3114D | Leroy Somer | alternator |
| LLB3114H | Leroy Somer | alternator |
| SJ24309 | ALTERNATOR (90A) | alternator |
| 01903596 | Battery or Battery Cable - Disconnect | battery |
| 127-0826 | Battery | battery |
| 153-5720 | Battery | battery |
| 125552 | Belt | belt |
| 8C-3620 | Belt | belt |
| L111601 | FAN DRIVE BELT (90 HP, With AC) | belt |
| L114488 | FAN DRIVE BELT (90 HP, Without AC) | belt |
| P532 | Fuel Injection Pump Solenoid Connector (2 Pin Connector) | connector |
| 8C-3600 | Coolant Filter | coolant_filter |
| g01264578 | Coolant flow | coolant_flow |
| i02234878 | Electrical System | electrical_system |
| i02403276 | Electrical System | electrical_system |
| i02321383 | Engine Electronics | engine_electronics |
| i01958113 | Engine Specification | engine_specification |
| g01249050 | Secondary Fuel Filter | fuel filter |
| g01266023 | Fuel Injection Pump | fuel injection pump |
| g01201611 | Fuel Injectors | fuel injectors |
| g01266024 | Fuel Manifold | fuel manifold |
| g01265623 | Fuel Priming Pump | fuel priming pump |
| g01265683 | Fuel Transfer Pump | fuel transfer pump |
| 26560201 | PERKINS 1104 / CATERPILLAR FUEL FILTER | fuel_filter |
| 8C-3627 | Fuel Filter | fuel_filter |
| N378886 | FUEL WATER SEPARATOR FILTER (If equipped) - N378886 | fuel_filter |
| RE526657 | FINAL FUEL FILTER | fuel_filter |
| RE544394 | FINAL FUEL FILTER | fuel_filter |
| RE546336 | PRIMARY FUEL FILTER | fuel_filter |
| 101940474 | Serial Number Plate: The Serial Number Plate is located on the left side of the cylinder block behind the high pressure pipes of the Fuel injection pump. | fuel_pump |
| g01259333 | The fuel injection pump and related components | fuel_pump |
| i02074845 | Fuel System | fuel_system |
| i02406189 | Cleanliness of Fuel System Components | fuel_system_cleanliness |
| 101-4000 | Gasket | gasket |
| i01958097 | General Information | general_information |
| g01162916 | Engine Electronics - Grounding Practices | grounding_practices |
| g01244554 | Illustration 12 - High Pressure Fuel Lines | high_pressure_fuel_line |
| i02378733 | High Pressure Fuel Lines | high_pressure_fuel_line |
| g01288650 | High pressure fuel system (typical example) | high_pressure_fuel_system |
| g00281646 | Illustration 7 | illustration |
| g00984281 | Illustration 1 | illustration |
| g00993373 | Illustration 3 | illustration |
| P691/J691 | Electronic Unit Injectors for No. 1 and No. 2 Cylinders (4 Pin Connector) | injector |
| P692/J692 | Electronic Unit Injectors for No. 3 and No. 4 Cylinders (4 Pin Connector) | injector |
| g01265309 | Low pressure fuel system (typical example) | low_pressure_fuel_system |
| g01264620 | Flow diagram of the lubrication system | lubrication_system |
| 250-0486 | Oil Filter | oil_filter |
| 101372247 | Mounting and Dismounting | other_service |
| 101940475 | Engine Identification: Perkins engines are identified by a serial number. This number is shown on a serial number plate that is mounted on the left hand side of the engine block. | other_service |
| 102143194 | Lines, Tubes and Hoses | other_service |
| 102157341 | Before Starting Engine | other_service |
| 102164876 | Reference Numbers: Information for the following items may be needed to order parts. Locate the information for your engine. | other_service |
| 102176668 | Electrical System | other_service |
| 102197956 | Emissions Certification Film: Label for compliant engines. Examples of emissions labels. | other_service |
| 134277 | T70, T90 & T120 Super Quiet Generator Maintenance Schedule | other_service |
| 402207232 | Engine Starting | other_service |
| 901011348 | Model View Illustrations 9 | other_service |
| SU34458 | BRAKE DISK (Hand Brakes) | other_service |
| YZ91139 | CLUTCH DISK | other_service |
| g00104545 | Illustration 4 | other_service |
| g00687600 | Always use a board or cardboard when you check for a leak. Leaking fluid that is under pressure can penetrate body tissue. | other_service |
| g00702020 | Wear a hard hat, protective glasses, and other protective equipment, as required. | other_service |
| g00704000 | Illustration 8 | other_service |
| g00704059 | Illustration 9 | other_service |
| g00704135 | Illustration 10 | other_service |
| g01011349 | Model View Illustrations 10 | other_service |
| g01012280 | Model View Illustrations 7 | other_service |
| g01012281 | Model View Illustrations 8 | other_service |
| g01119323 | Emissions Control Information: ENGINE FAMILY: 1104C - 44TA MODEL YEAR: 2003. FOLLOWING INFORMATION APPLICABLE TO USA ONLY. This non-road engine does not comply with either federal non-road or California off-road engine emission regulation requirement. | other_service |
| g01154807 | Typical example | other_service |
| g01154858 | Typical example | other_service |
| g01187485 | Cylinder and valve location (Illustration 22) | other_service |
| g01200801 | Illustration 18 | other_service |
| g01205681 | Illustration 5 - Air inlet and exhaust system | other_service |
| g01216877 | Illustration 17 | other_service |
| g01245940 | Rear right engine view | other_service |
| g01245941 | Front left engine view | other_service |
| g01263698 | Typical Cylinder Block | other_service |
| g01263700 | Typical cylinder head | other_service |
| g01263701 | Pistons, Rings and Connecting Rods | other_service |
| g01263702 | Crankshaft | other_service |
| g01263703 | Gears and Timing Gear Case | other_service |
| g01263705 | Illustration of gears and timing gear case | other_service |
| g01263706 | Camshaft | other_service |
| g01263708 | Rocker Shaft Assembly | other_service |
| g01268960 | Hand (High Pressure) | other_service |
| g01426636 | Ether | other_service |
| g03450122 | Hand (High Pressure) | other_service |
| g03450123 | The warning label for the Hand (High Pressure) (2) | other_service |
| g03452577 | Grounding Practices (Illustration 15) | other_service |
| g03452579 | Grounding Practices (Illustration 16) | other_service |
| g03453612 | Serial Number Plate (Illustration 24) | other_service |
| i01372247 | Mounting and Dismounting | other_service |
| i01928905 | Engine Stopping | other_service |
| i02143194 | Crushing Prevention and Cutting Prevention | other_service |
| i02157341 | Before Starting Engine NOTICE For initial start-up of a new or rebuilt engine, and for start-up of an engine that has been serviced, make provision to shut the engine off should an overs peed occur. This may be accomplished by shutting off the air and/or fuel supply to the engine. | other_service |
| i02197956 | Record the information in the appropriate space. Make a copy of this list for a record. Keep the information for future reference. | other_service |
| i02207232 | Do not use aerosol types of starting aids such as ether. Such use could result in an explosion and personal injury. | other_service |
| i02234873 | Engine Stopping | other_service |
| i02235492 | Mounting and Dismounting | other_service |
| i02251260 | Engine Starting | other_service |
| i02322199 | Before Starting Engine | other_service |
| i02328435 | General Hazard Information | other_service |
| i02330192 | Monitoring System | other_service |
| i02334785 | Burn Prevention | other_service |
| i02378728 | Safety Messages | other_service |
| i02517251 | Introduction | other_service |
| i02525716 | Basic Engine Introduction | other_service |
| i02864025 | Safety Messages | other_service |
| i04823662 | Fire Prevention and Explosion Prevention | other_service |
| i05272352 | Engine Electronics (Operation Section) | other_service |
| i05302522 | Static Electricity Hazard when fueling with Ultra-low Sulfur Diesel Fuel | other_service |
| i05461290 | Safety Messages | other_service |
| i05463929 | Mounting and Dismounting | other_service |
| i05463931 | High Pressure Fuel Lines | other_service |
| i05464430 | Electrical System Never disconnect any charging unit circuit or battery circuit cable from the battery when the charging unit is operating. | other_service |
| i05536748 | Product Information - General Information | other_service |
| i05536753 | Product Description - Off Engine Parts and Options | other_service |
| i05536932 | Product Identification - Information (Illustration 23) | other_service |
| i05537598 | Gauges and Indicators (Illustration 31) | other_service |
| i05546770 | Monitoring System | other_service |
| i05737934 | General Hazard Information | other_service |
| i07451407 | Operation Section - Lifting and Storage (Illustration 26) | other_service |
| i08315117 | General Hazard Information | other_service |
| 01907756 | Water Pump - Inspect | pump |
| 4132F071 | PERKINS 1103/1104 ENGINES OIL PUMP ASSY | pump |
| ULPK0038 | PERKINS 1104 LIFT PUMP KIT | pump |
| 2418M517 | PERKINS 1104 VALVE SEAL (VITON) | seal |
| 2848A071 | PERKINS 1104 OIL PRESSURE SWITCH | sensor |
| P100 | Coolant Temperature Sensor (2 Pin Connector) | sensor |
| P103 | Intake Manifold Temperature Sensor (2 Pin Connector) | sensor |
| P200 | Intake Manifold Pressure Sensor (3 Pin Connector) | sensor |
| P201 | Engine Oil Pressure Sensor (3 Pin Connector) | sensor |
| P228 | Fuel Pressure Sensor (3 Pin Connector) | sensor |
| P401 | Primary Speed/Timing Sensor (2 Pin Connector) | sensor |
| P402 | Secondary Speed/Timing Sensor (2 Pin Connector) | sensor |
| g01236714 | Coolant Temperature Sensor | sensor |
| 250-0488 | Spark Plug | spark_plug |
| 4133L066 | PERKINS 1104D-E44T, 1104D-E44TA, 1106D-E66TA THERMOSTAT | thermostat |
| 4133L507 | PERKINS 1103, 1104 THERMOSTAT (82 Degrees) | thermostat |
| T413847 | PERKINS 1104, 1106 / CATERPILLAR THERMOSTAT | thermostat |
| 02196981 | Perkins Engines are designed for the following applications: machine, genset, and industrial mobile equipment. The engines are available in the following types of aspiration: Turbocharged aftercooled, Turbocharged, Naturally aspirated. | turbocharger |
| g00302786 | Illustration 6 - Turbocharger | turbocharger |
| g01263770 | Turbocharger | turbocharger |
| g03506649 | Turbocharge Engine View (Illustration 20) | turbocharger |
| i02527637 | Valve system components | valves |
| g01287919 | Typical turbocharger with the wastegate | wastegate |
| P601 | Wastegate Valve (if equipped) (2 Pin Connector) | wastegate valve |
| g00765012 | Welding on Engines with Electronic Controls | welding_procedures |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.
Parts listed by aftermarket suppliers as fitting this engine — leads compiled from supplier catalogs; verify the exact part for your serial number.
Other equipment known to use this engine, via filter-application cross-reference — useful for sourcing parts even when your exact machine isn't listed elsewhere on this page.
The Perkins 1104D-44T engine has an oil capacity of 7.9 liters.
The Perkins 1104D-44T has a displacement of 4.4 liters with 4 cylinders.
The Perkins 1104D-44T powers 1 generator set(s), including Perkins 1104D-44T IOPU.
The Perkins 1104D-44T oil change interval is every 500 hours.