The Caterpillar 3412C is a 27.03 L 12-cylinder turbocharged-aftercooled engine rated at 1800 rpm, producing up to 746 kW. It powers generator sets from Caterpillar, including the 3412C 50Hz, 3412C 60Hz and 3412C Generator Set DJN1-Up. It holds 139 L (36.7 gal) of oil and 67 L (17.7 gal) of coolant.
Also known as: CATERPILLAR 3412C
Part of the Caterpillar 3412C engine family — 3 variants share parts & fitment.
| Oil capacity | 139.0 L |
|---|---|
| Coolant capacity | 67.0 L |
| Displacement | 27.03 L |
| Cylinders | 12 |
| Aspiration | Turbocharged-Aftercooled |
| Rated speed | 1800 rpm |
| Gross power | 746 kW |
| Code | Meaning | Remedy |
|---|---|---|
| i01226491 | Engine overspeed | Stop the engine by shutting off the fuel supply to the engine and/or shutting off the air supply to the engine. |
| 21 | Fault shutdown | |
| 22 | Fault alarm | |
| null | Increased coolant temperature |
| Symptom | Cause | Remedy |
|---|---|---|
| Yellow fault alarm indicator (26) flashes | Refer to the Systems Operation, Testing and Adjusting, RENR2484, “Electronic Modular Control Panel II + (EMCP II+)” for descriptions of the fault codes | |
| Red fault shutdown indicator (25) flashes | Refer to the Systems Operation, Testing and Adjusting, RENR2484, “Electronic Modular Control Panel II + (EMCP II+)” for descriptions of the fault codes | |
| Dedicated shutdown faults: low oil pressure | Engine oil pressure drops below setpoints programmed into GSC+ | Correct the fault and engine is not allowed to start until the fault is corrected |
| Dedicated shutdown faults: emergency stop | Operator presses Emergency Stop Push Button (ESPB) on front panel | Correct the condition and engine is not allowed to start until the condition is corrected |
| Dedicated shutdown faults: high water temperature | Engine coolant temperature rises above setpoint programmed into GSC+ | Correct the fault and engine is not allowed to start until the fault is corrected |
| Dedicated shutdown faults: engine overspeed | Engine speed exceeds setpoint programmed into GSC+ | Correct the fault and engine is not allowed to start until the fault is corrected |
Fault codes and symptom→remedy steps extracted from this engine’s service/owner documentation; verify against the official manual before servicing.
Compiled from service & troubleshooting documentation across every generator set that uses the Caterpillar 3412C.
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Dual Element | 612506 | PartsGeek $66.97 | ||
| Fuel filter | Primary Filter (Water Separator) | 3089679 | 250 hr | PartsGeek $25.97 | |
| Oil filter | 2P4005 | 250 hr | PartsGeek $23.97 | ||
| Belt | Alternator and Fan Belts | — | 250 hr | find | |
| Coolant | DEAC or ELC | — | 6000 hr | ||
| Oil | — | 250 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 |
|---|---|---|
| 3412C | Engine | engine |
| 8N1728 | Connecting rod | 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 |
| g00294510 | Improper jumper cable connections can cause an explosion resulting in personal injury. | other_service |
| i01359666 | Crushing Prevention and Cutting Prevention | other_service |
| i01372247 | Mounting and Dismounting | other_service |
| i01372262 | Illustration 4: Safety message for flammable fluids and hot surfaces. | other_service |
| i01480768 | Burn Prevention | other_service |
| i01658146 | Important Safety Information | other_service |
| i01805780 | Before Starting Engine | other_service |
| i02345910 | Do not allow unauthorized personnel on the engine or around the engine when the engine is serviced. | other_service |
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.
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 3412C engine has an oil capacity of 139.0 liters.
The Caterpillar 3412C has a displacement of 27.03 liters with 12 cylinders.
The Caterpillar 3412C powers 5 generator set(s), including Caterpillar 3412C, Caterpillar 3412C 50Hz, Caterpillar 3412C 60Hz, Caterpillar 3412C Generator Set DJN1-Up, Caterpillar 3412C Generator Set TGC1-Up.
The Caterpillar 3412C uses oil filter part numbers Caterpillar 2P4005, Donaldson P554005, Wix 51792.
The Caterpillar 3412C uses fuel filter part numbers Caterpillar 3089679, Donaldson P551311, Wix 33674NP.
The Caterpillar 3412C uses air filter part numbers Caterpillar 612506, Donaldson P532506, Wix 46589.
The Caterpillar 3412C oil change interval is every 250 hours.
A commonly reported issue on generators using the Caterpillar 3412C is: Yellow fault alarm indicator (26) flashes. Fix: Refer to the Systems Operation, Testing and Adjusting, RENR2484, “Electronic Modular Control Panel II + (EMCP II+)” for descriptions of the fault codes.