The Caterpillar 3406C TA is a 14.64 L 6-cylinder ataac engine rated at 1500 rpm, producing up to 245 kW. It powers generator sets from Caterpillar, including the AUXILIAR, DM2273 and DM7525. It holds 38 L (10.0 gal) of oil and 20.8 L (5.5 gal) of coolant.
Also known as: CAT 3406C TA
Part of the Caterpillar 3406C engine family — 3 variants share parts & fitment.
The cheapest captured merchant offer per filter — see the full cross-reference below for every OEM/aftermarket option.
Prices captured from merchant listings; some links are affiliate links. Verify against your serial number before ordering.
| Oil capacity | 38.0 L |
|---|---|
| Coolant capacity | 20.8 L |
| Displacement | 14.64 L |
| Cylinders | 6 |
| Aspiration | ATAAC |
| Rated speed | 1500 rpm |
| Gross power | 245 kW |
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | — | ||||
| Fuel filter | — | ||||
| Oil filter | — | ||||
| Battery | — | ||||
| Belt | — | ||||
| Coolant | 20.8 L | — | |||
| Oil | 38.0 L | — | |||
| Spark plug | — |
Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.
| Fluid | Grade | Standard | Ambient | Capacity | Notes |
|---|---|---|---|---|---|
| Coolant | SCAC cooling / jacket water | Generator temperature rise based on a 40 degree C ambient per NEMA MG1-32. | |||
| Engine oil | Lubricating oil | 675.0 L | Sump refill with filter; integral lube oil cooler, gear type lube oil pump | ||
| Fuel | 35 API gravity | LHV of 42 780 kJ/kg (18,390 Btu/lb) at 29 C (85 F), weighing 838.9 g/liter (7.001 lbs/U.S. gal.) | |||
| Fuel | No. 2 diesel fuel, 35º API gravity | LHV 42 780 kJ/kg (18,390 Btu/lb) | Weighing 838.9 g/liter (7.001 lbs/U.S. gal.), used at 29º C (85º F). Consult Cat dealer for Low Sulfur fuel and Biodiesel capability. |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
| Part # | Description | Category |
|---|---|---|
| 102-9720 | Cleaning Kit (detergent and oil for AIRSEP air cleaner elements) | air_filter |
| 1W7411 | CLEANER GP-AIR(D)(HEAVY DUTY) | air_filter |
| 4N0015 | Air filter outer | air_filter |
| 6I2504 | Air filter inner | air_filter |
| 8N9759 | MOUNTING GP - AIR CLEANER | air_filter |
| 50-amp | Alternator | alternator |
| 6N9294 | CHARGING ALTERNATOR 24V 35 AMP | alternator |
| 118-2018 | V-belt | belt |
| 164-4599 | V-belt | belt |
| 1W4878 | BELT GUARD - ALTERNATOR PULLEY | belt |
| 4N6302 | V-belt | belt |
| 6N6798 | V-belt | belt |
| W200-1002 | Buffer Seal | buffer_seal |
| 9N2366 | Precharge filter element (attachment coolant conditioner group maintenance filter element) | coolant_filter |
| 9N3368 | Coolant Conditioner Element | coolant_filter |
| i01329129 | Coolant | coolant_filter |
| i01359892 | Coolant | coolant_filter |
| W200-1001 | Cylinder Rod Seal - Wiper Seal | cylinder_rod_seal |
| 4C4611 | Cooling System Cleaner, Fast Acting-Type, 3.8 L (1 U.S. gal) container | fluid |
| 6V4511 | Cooling System Cleaner, Standard-Type, 1.9 L (1/2 U.S. gal) container | fluid |
| ON5561 | Silicone Lubricant for battery cable clamps and terminals | fluid |
| 1R-0749 | Fuel Secondary - ADV | fuel_filter |
| 1R-0750 | High Efficiency Fuel Filter | fuel_filter |
| 1R-0751 | High Efficiency Fuel Filter | fuel_filter |
| 1R-0755 | High Efficiency Fuel Filter | fuel_filter |
| 1R-0756 | High Efficiency Fuel Filter | fuel_filter |
| 1R-0766 | High Efficiency Fuel Filter | fuel_filter |
| 326-1642 | Filter water separator | fuel_filter |
| 326-1643 | Filter water separator | fuel_filter |
| 3S3875 | Filter fuel | fuel_filter |
| 9N3717 | Filter water separator | fuel_filter |
| 1282922CAT | Water Pump Gasket Set - 0.4 lbs/ 0.18 kgs, 5" Length, 27mm Width, 27mm Depth, 11 Application: 3400 | gasket |
| 13373 | Gasket, lens oval | gasket |
| 1555619CAT | Flywheel Housing Gasket - 3406 | gasket |
| 1609874CAT | Single Cylinder Liner Gasket Set - 3406/ 3412 0.1 lbs/ 0.04 kgs | gasket |
| 2161252CAT | Single Cylinder Head Gasket Set - 3406/ 3406E | gasket |
| 3N4861 | GASKET | gasket |
| 4N1151 | Gasket oil pan | gasket |
| 6I3066 | Gasket cylinder head | gasket |
| DM-3E3322 | GASKET SET, FUEL SYSTEM 3406 | gasket |
| DM-3E7474 | GASKET SET, FUEL SYSTEM 3406 | gasket |
| DM-3E7485 | GASKET SET, FUEL SYSTEM 3406 | gasket |
| DM-3E7495 | GASKET SET, FUEL SYSTEM 3406 | gasket |
| DM-6I3066 | GASKET, CYL. HD. 3406 | gasket |
| DM-8C4452 | GASKET SET, FUEL SYSTEM 3406 | gasket |
| DM-8C6538 | GASKET SET, FUEL SYSTEM 3406 | gasket |
| DM-8C6772 | GASKET SET, FUEL SYSTEM 3406 | gasket |
| DM-8C8490 | GASKET SET, FUEL SYSTEM 3406 | gasket |
| DM-8C8764 | GASKET SET, FUEL SYSTEM 3406 | gasket |
| M-1282922 | Water Pump Mounting Gasket | gasket |
| M-1609874 | Gasket Set - Cylinder Liner Packing | gasket |
| M-1P436 | 1 Fuel Priming Pump Gasket | gasket |
| M-3639022 | Gasket Set - Front Structure | gasket |
| M-4N1151 | Oil Pan Gasket | gasket |
| M-4N1151-6 | Oil Pan Gasket | gasket |
| M-4N1156 | Gasket | gasket |
| M-4N7253 | Nozzle Adapter Gasket | gasket |
| M-5P5678-6 | Valve Cover Gasket | gasket |
| M-5P5678-9 | Valve Cover Gasket | gasket |
| M-7C307 | Gasket | gasket |
| MCB3406031 | Overhaul Gasket Set | gasket |
| MCB3406032 | In-Chassis Gasket Set | gasket |
| MCB3406033 | Cylinder Head Set | gasket |
| 3T8705 | Glow plug | glow_plug |
| 3T8706 | Glow plug | glow_plug |
| i01206414 | Standard Torque for Constant Torque Hose Clamps | hose |
| i01206505 | Standard Torque for Worm Drive Band Hose Clamps | hose |
| 094-4412 | Filter hydraulic | hydraulic_filter |
| W200-1000 | Hydraulic Cylinder Reseal Service Kit | hydraulic_filter |
| 3N4859 | IMPELLER | impeller |
| M-1007551 | Fuel Nozzle - 7000 Series | injector |
| M-1007556 | Fuel Nozzle - 7000 Series | injector |
| M-1007557 | Fuel Nozzle - 7000 Series | injector |
| M-1007558 | Fuel Nozzle - 7000 Series | injector |
| M-1279792 | Fuel Nozzle - 7000 Series | injector |
| M-1279793 | Fuel Nozzle - 7000 Series | injector |
| M-1311243 | Fuel Nozzle - 7000 Series | injector |
| M-4W7017 | Fuel Nozzle - 7000 Series | injector |
| M-4W7018 | Fuel Nozzle - 7000 Series | injector |
| M-4W7022 | Fuel Nozzle - 7000 Series | injector |
| M-7W7026 | Fuel Nozzle - 7000 Series | injector |
| M-7W7032 | Fuel Nozzle - 7000 Series | injector |
| M-7W7037 | Fuel Nozzle - 7000 Series | injector |
| M-7W7040 | Fuel Nozzle - 7000 Series | injector |
| M-7W7041 | Fuel Nozzle - 7000 Series | injector |
| M-7W7042 | Fuel Nozzle - 7000 Series | injector |
| M-7W7043 | Fuel Nozzle - 7000 Series | injector |
| M-7W7044 | Fuel Nozzle - 7000 Series | injector |
| M-9L6884 | Fuel Nozzle - Capsule | injector |
| M-9N3246 | Fuel Nozzle - Capsule | injector |
| 102-2828 | Filter oil | oil_filter |
| 1R1808 | Filter oil | oil_filter |
| 9M9740 | Filter oil | oil_filter |
| 0P8708 | POWER PLUS RENTL FINANCE PRGM | other_service |
| 0P9484 | 0P948401JUL98PRC PROPGM641-6 | other_service |
| 102-9721 | Air/Vacuum Limiter Filter Element Cleaning Kit (non-U.S.) | other_service |
| 1031956 | MOUNTING GP - CONTACTOR | other_service |
| 1036101 | CONTROL GP -A | other_service |
| 1037284 | MOUNTING GP - BREAKER | other_service |
| 1047942 | FASTENER GP | other_service |
| 1048615 | BASE GP - FUEL TANK & | other_service |
| 1059710 | LINES GP - OIL DRAIN | other_service |
| 1069931 | LINES GP - DRAIN | other_service |
| 1080723 | HARNESS GP - WIRING | other_service |
| 1095264 | PANEL AR - CONTROL | other_service |
| 1114219 | MOUNTING GP - CONTROL PANEL | other_service |
| 1114421 | ACTUATOR AS - 524 GOVERNOR | other_service |
| 1117534 | MOUNTING GP - ACTUATOR | other_service |
| 1172855 | TRANSFER GP | other_service |
| 1309415 | 3406 DITA/XQ350 RENTAL PKG | other_service |
| 1315455 | CONTROL AS | other_service |
| 1315544 | RADIATOR GP | other_service |
| 1N3876 | 3406 DITA ENGINE AR - BASIC | other_service |
| 249-0433 | Oxidation Catalyst Assembly - Round | other_service |
| 256-0326 | Oxidation Catalyst Assembly - Round | other_service |
| 2T8141 | 387 KW @ 1800 RPM (519 BHP) | other_service |
| 2W8198 | SOLENOID SHUTOFF - ETR 24 V | other_service |
| 3N4858 | SHAFT | other_service |
| 3N4860 | CAM LINER | other_service |
| 3N4862 | WEAR PLATE | other_service |
| 4N3093 | BLOWER FAN | other_service |
| 4N6540 | MOUNTING GP-HEATER | other_service |
| 4N9778 | UPPER RADIATOR CONNECTIONS | other_service |
| 4P3359 | COUPLING | other_service |
| 4P6247 | PICK UP GP - MAGNETIC | other_service |
| 4P7610 | PICK UP GP - MAGNETIC | other_service |
| 4P9687 | SR4 GENERATOR AR-POWER (60HZ) | other_service |
| 4W1727 | COVER GP | other_service |
| 4W5828 | AIR INLET HOOD | other_service |
| 5P2506 | LITERATURE GP - ENGLISH | other_service |
| 5P2586 | OIL - BULK - ONE LITER | other_service |
| 6I0371 | ENCLOSURE GP | other_service |
| 6L2927 | DRY ELBOW | other_service |
| 6N8878 | FUEL PRESSURE GAUGE | other_service |
| 6V4876 | Molykote paste | other_service |
| 7E5996 | Connecting rod | other_service |
| 7E6247 | JACKET WATER HEATER | other_service |
| 7N8840 | FAN DRIVE 0.800 RATIO | other_service |
| 7W1340 | MOUNTING GP - ALTERNATOR | other_service |
| 8N1726 | Connecting rod | other_service |
| 9G4231 | BATTERY - 12 VOLT | other_service |
| BER0005 | BEARING | other_service |
| CAMSET0018 | CAM LINER | other_service |
| DZ111166 | (3402) (3404) (3408) (3409) (974G) | other_service |
| JSK002601 | SERVICE KIT | other_service |
| M-2485513 | 1 Regulator - 180ºC | other_service |
| P34605 | Housing Assembly Group Front (distributor body marked FRONT) | other_service |
| P34610 | Housing Assembly Group Rear (distributor body marked REAR) | other_service |
| P34616 | P-36 Basic Kit | other_service |
| P34617 | Electrical Group - Mechanical (Harness P813-CT included) | other_service |
| PEHP3036 | Cat Reman Short and Long Blocks | other_service |
| PEHP3036-01 | Cat Reman Short and Long Blocks | other_service |
| QEHQ9870 | Rear Wheel Assist System | other_service |
| SHA0046 | SHAFT | other_service |
| WER0010 | WEAR PLATE | other_service |
| g00104545 | Illustration 4 | other_service |
| g00107406 | Illustration 1: Safety message for the clutch located on the clutch housing (if equipped). | other_service |
| g00107407 | Illustration 2: Safety message for rotating gears that can cause entanglement of the fingers and hands. | other_service |
| g00291056 | Illustration 20 (Electronic Overspeed Switch with Cranking Termination) | other_service |
| g00293335 | Illustration 19 (Magnetic pickup, Flywheel housing) | other_service |
| g00367054 | The warning label for lifting the engine with a fuel tank is located on the fuel tank (if equipped). | other_service |
| g00455028 | Improper jumper cable connections can cause an explosion resulting in personal injury. | other_service |
| g00524010 | Typical location of the batteries in the battery compartment | other_service |
| g00524148 | Lift eyes or tank can fail when lifting tank containing fluids resulting in possible personal injury. Drain tank of all fluids before lifting. | 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 |
| g00702022 | Caterpillar equipment and replacement parts that are shipped from Caterpillar are asbestos free. | other_service |
| g00704000 | Illustration 8 | other_service |
| g00706404 | Illustration 7 | other_service |
| g00722253 | Illustration 12 | other_service |
| i00061495 | Information Plate | other_service |
| i00062369 | Engine Stopping | other_service |
| i00610276 | Reference Numbers | other_service |
| i00621349 | Standard Torque for Inch Fasteners | other_service |
| i00621350 | Standard Torque for Metric Fasteners | other_service |
| i00777190 | Drain tank of all fluids before lifting. | other_service |
| i00826199 | Engine Identification | other_service |
| i01072501 | Before Starting Engine | other_service |
| i01103904 | Engine Starting | other_service |
| i01193826 | Emissions Certification Film | other_service |
| i01359622 | Mounting and Dismounting | other_service |
| i01359666 | Crushing Prevention and Cutting Prevention | other_service |
| i01359759 | General Hazard Information | other_service |
| i01368857 | Safety Signs and Labels | other_service |
| i01369271 | Model View Illustrations | other_service |
| i01369284 | Engine Description | other_service |
| i01369380 | Serial Number Plate | other_service |
| i01369505 | Gauges and Indicators | other_service |
| i01369587 | Engine Features and Controls | other_service |
| 108-6633 | Fuel pump | pump |
| 1313533 | PUMP GP - GOVERNOR | pump |
| 135-4925 | Water pump | pump |
| 138-6744 | Water pump repair kit | pump |
| 161-4111 | Oil pump | pump |
| 1W1700 | Lift/transfer pump | pump |
| 384-8612 | Lift/transfer pump | pump |
| 5N4852 | PUMP ASSY | pump |
| JPR-CT3406 | PUMP ASSY | pump |
| M-1052508 | 1 Fuel Priming Pump | pump |
| M-1354926 | Water Pump | pump |
| M-1375541 | Fuel Priming Pump | pump |
| M-1W1700 | Fuel Transfer Pump | pump |
| M-4N733 | Oil Pump | pump |
| 142-5867 | Front seal | seal |
| 142-5868 | Rear seal | seal |
| 3N4863 | OIL SEAL | seal |
| 3N5632 | M-SEAL | seal |
| 4W3864 | Water pump seal | seal |
| M-1090077 | Seal O-Ring | seal |
| M-1425867 | Front Crankshaft Seal | seal |
| M-1425868 | Rear Crankshaft Seal | seal |
| M-1632478 | 6 6 Valve Stem Seal - Exhaust | seal |
| M-2S2251 | Nozzle Adapter Seal Ring | seal |
| M-3S9643 | Regulator Seal | seal |
| M-5H7153 | Nozzle Adapter Seal Ring | seal |
| M-5S2106 | Fan Hub Seal | seal |
| M-7F2122 | Fan Hub O-Ring Seal | seal |
| M-8M5249 | Nozzle Adapter Seal Ring | seal |
| MCBKT7000 | Nozzle Seal Kit - 7000 Series | seal |
| MCSSET0007 | M-SEAL(WITH SNAP-RING) | seal |
| ESD5526 | Speed Controller | speed_controller |
| 4N1062 | ELECTRIC STARTING MOTOR LH 24V | starter |
| 247-7133 | Thermostat | thermostat |
| 248-5513 | Thermostat | thermostat |
| M-1209453 | Regulator - 170° | thermostat |
| M-2477133 | Regulator - 190° | thermostat |
| 7C7691 | Turbocharger | turbocharger |
| W200-1003 | U-cup Seal | u_cup_seal |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.
Cross-referenced via Donaldson + OEM/engine-maker interchange — options to verify against your serial number, not confirmed for every exact variant.
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 Caterpillar 3406C TA engine has an oil capacity of 38.0 liters.
The Caterpillar 3406C TA has a displacement of 14.64 liters with 6 cylinders.
The Caterpillar 3406C TA powers 4 generator set(s), including Caterpillar 3406C TA, Caterpillar AUXILIAR, Caterpillar DM2273, Caterpillar DM7525.
The Caterpillar 3406C TA uses oil filter part numbers Caterpillar 3890434, Caterpillar 1W3300, Caterpillar 2P4005.
The Caterpillar 3406C TA uses fuel filter part numbers Caterpillar 3089679, Caterpillar 3I1333, Donaldson P551311.
The Caterpillar 3406C TA uses air filter part numbers Caterpillar 6T0988, Caterpillar 1212760, Caterpillar 612506.