The Perkins 1104D-44TAG2 is a 4.41 L turbocharged and charge air cooled engine rated at 1800 rpm. It powers generator sets from FG Wilson and Terex, including the XD100P4 and T90. It holds 8 L (2.1 gal) of oil and 7 L (1.8 gal) of coolant.
Also known as: Perkins 1104D-44TAG2
Part of the Perkins 1104D engine family — 16 variants share parts & fitment.
| Oil capacity | 8.0 L |
|---|---|
| Coolant capacity | 7.0 L |
| Displacement | 4.41 L |
| Aspiration | turbocharged and charge air cooled |
| Rated speed | 1800 rpm |
Shared across brands: FG Wilson, Terex
Compiled from service & troubleshooting documentation across every generator set that uses the Perkins 1104D-44TAG2.
| Part # | Description | Category |
|---|---|---|
| 125562 | Air Filter - Secondary | 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 |
| 125552 | Belt | Belt |
| P532 | Fuel Injection Pump Solenoid Connector (2 Pin Connector) | Connector |
| 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 |
| 101-4000 | Gasket | Service part / kit |
| 127-0826 | Battery | Service part / kit |
| 134277 | T70, T90 & T120 Super Quiet Generator Maintenance Schedule | Service part / kit |
| 153-5720 | Battery | Service part / kit |
| 250-0486 | Oil Filter | Service part / kit |
| 250-0488 | Spark Plug | Service part / kit |
| 8C-3600 | Battery | Service part / kit |
| 8C-3601 | Battery | Service part / kit |
| 8C-3620 | Belt | Service part / kit |
| 8C-3627 | Fuel Filter | Service part / kit |
| 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 |
| 4133L066 | PERKINS 1104D-E44T, 1104D-E44TA, 1106D-E66TA THERMOSTAT | Thermostat |
| P601 | Wastegate Valve (if equipped) (2 Pin Connector) | Wastegate valve |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.
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-44TAG2 engine has an oil capacity of 8.0 liters.
The Perkins 1104D-44TAG2 has a displacement of 4.41 liters.
The Perkins 1104D-44TAG2 powers 2 generator set(s), including FG Wilson XD100P4, Terex T90.
A commonly reported issue on generators using the Perkins 1104D-44TAG2 is: Fluctuating generator output voltage. Cause: An “ON/OFF” type load may be the cause. Fix: Redistribute load if possible.