The Cummins/Onan NT855-F3 is a 14 L 6-cylinder turbocharged engine rated at 2100 rpm, producing up to 224 kW. It powers generator sets from Cummins/Onan, including the FIRE PUMP NT855-F3 BIG CAM. It holds 28.8 L (7.6 gal) of oil and 39.7 L (10.5 gal) of coolant.
Also known as: Cummins NT855-F3
Part of the Cummins/Onan NT855 engine family — 5 variants share parts & fitment.
| Oil capacity | 28.8 L |
|---|---|
| Coolant capacity | 39.7 L |
| Displacement | 14.0 L |
| Cylinders | 6 |
| Aspiration | Turbocharged |
| Rated speed | 2100 rpm |
| Gross power | 224 kW |
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Part Number of Standard Air Filter Element ....................................................3022209 | 3022209 | PartsGeek FridayParts $44.99 | ||
| Fuel filter | Part Number of Standard Fuel Filter.................................................................................. 3315847 | 3315847 | PartsGeek | ||
| Oil filter | Part Number of Standard Oil Filter Element ......................................................................3889310 | — | find | ||
| Belt | — | find | |||
| Coolant filter | — | find | |||
| Oil | Full Flow Lube Oil Filter Capacity - U.S. gal. (litre).............................................................7.6 (28.8) | 7.6 U.S. gal | — |
Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.
| Part # | Description | Category |
|---|---|---|
| 140-1347 | Cap, Air Cleaner | air_filter |
| 140-2391 | Element - Air Cleaner (Standard) | air_filter |
| 155-1035 | Cleaner, Air | air_filter |
| 232A1817 | Generator | air_filter |
| 503-0641 | Hose, Flexible Air Cleaner | air_filter |
| 503-0748 | Clamp, Hose - Air Cleaner | air_filter |
| CS-1382c | INLET AIR DAMPER | air_filter |
| ES-1214-2 | FLOAT SWITCH | air_filter |
| 191-0688 | Alternator - Includes Regulator (Motorola #70D44039B04) | alternator |
| 191-0781 | 191-0688 t | alternator |
| 191-1981 | Fan, Alternator | alternator |
| 191-1982 | Pulley, Alternator | alternator |
| 191-1983-02 | Alternator, 24 Volt Spec B-O (Prestolite) | alternator |
| 302P412 | AMMETER, AC (CHECK SCALE - SELECT ACCORDING TO RATING) Scale 0-250 | ammeter |
| 302P414 | AMMETER, AC (CHECK SCALE - SELECT ACCORDING TO RATING) Scale 0-500 (Qty. is 2 for I-Ph.) | ammeter |
| 234070 | Rig Assy., Brush- Incl. Brushes, & Contact Point Band, Gen. - Front Portion(Narrow) | band |
| A956 | 2-12 VOLT BATTERIES | battery |
| 2110153 | Bell, End - Alt, to Exciter | bell |
| 191-0725 | Guard, Belt | belt |
| 511-0084 | 130-3176-02 1 191-1926-02 70D44970S02 MO 1 3RG3032 MO 1 511-0156 2 LO 3318853 CE 1 12 | belt |
| 511-0092 | Belt, Alternator | belt |
| 805-35 | Bolt, Place - Generator Mtg. Support to End Bell | bolt |
| 1S0A713 | Bracket, Overspeed Switch | bracket |
| 2348115 | Bracket, Mtg. - Volt. Cont. Reactor | bracket |
| 234875 | Bracket, Gate Reactor Mtg. | bracket |
| 319-2236 | Bracket, Mounting | bracket |
| 2I4AM | Brush | brush |
| 505-0019 | Bushing, Pipe - Reducer 1/2” to 3/8”, DFBF (1/2” to 3/8”) 505-0131 DFCB, DFCC, DFCE (3/4” to 3/8”) | bushing |
| 518-0548-58 | Clamp, Hose | clamp |
| 2340116 | Cover, Exciter | cover |
| 0300-4623-08 | DFBF (600V) | current_transformer |
| 0300-4623-23 | DFBF BR (0-480V) | current_transformer |
| FS1803s | FUEL FILTERS | fuel_filter |
| FP-KS12622A | NH/NT855 In-Frame Kit w/upper gasket set & oil pan gasket | gasket |
| FP-KS12622C | NH/NT855 In-Frame Kit w/upper gasket set & oil pan gasket | gasket |
| FP-KS12622C7 | NH/NT855 In-Frame Kit w/upper gasket set & oil pan gasket | gasket |
| FP-KS12622D | NH/NT855 In-Frame Kit w/upper gasket set & oil pan gasket | gasket |
| M-4024945 | Edge molded rubber head gaskets set | gasket |
| 501-0087 | ClamD, Hose | hose |
| 502-0827 | Hose, Barb (1/2–14) | hose |
| 503-0189 | Clamp, Hose | hose |
| 503-0354 | Clamp, Hose | hose |
| 503-0752 | Hose, Upper | hose |
| 503-0756 | Hose, Radiator (Lower) | hose |
| 503-1634-01 | Hose, Rubber (3/4” ID x 4”) | hose |
| 302P465 | RUNNING-TIME METERS 120-240V (1PH) | meter |
| 302P466 | For 220/380-V, 3-Ph, 60-Cycle (Model H) | meter |
| 302P467 | For 277/480-V, 3-Ph, 60-Cycle | meter |
| 302P468 | For 120/208-V,120/240-V, & 347/600-V 3PH. 50 Cy!. (825-Ohm, 75-Watt) | meter |
| 302P469 | For 220/380-V, 3Ph. 50-Cycle | meter |
| 302P470 | For 277/480-V, 3-Ph, 50-Cyclo (5-P!) | meter |
| 309-0641-03 | Switch, Low Oil Pressure (S110) | oil_filter |
| 102-1335 | Plug, Oil Drain | other_service |
| 130-0843 | Bracket, Radiator Support | other_service |
| 130-0846 | Opening for 34" Fan | other_service |
| 130-0924 | Clamp, Hose | other_service |
| 130-0992 | Radiator | other_service |
| 130-3588 | Cap, Radiator | other_service |
| 130-4355 | Radiator (2 Row Core) DFBJ | other_service |
| 130-4355-01 | Radiator (3 Row Core) DFCF, DFCG | other_service |
| 130-4369 | Radiator DFCH | other_service |
| 140-1349 | Cable, Battery Positive | other_service |
| 140-2389 | 140-2391 1 140-2390 1 140-2392 1 140-2393 1 140-1548 1 140-1545 1 c 503-1575 186917 C | other_service |
| 155-2409-01 | Elbow, Exhaust (5" OD With Threads) | other_service |
| 191-1141 | Bracket, Alternator Mounting | other_service |
| 191-2121 | Regulator, Voltage | other_service |
| 232A1489 | Generator support shim, 0.598 in gauge #6, 3x3 | other_service |
| 232A1490 | Generator support shim, 0.359 in gauge #20, 3x3 | other_service |
| 301021151 | Box Only, control | other_service |
| 30118301 | Bracket, Cont.Box Mtg. (Repl. 2-Piece Brkts) | other_service |
| 301A1914 | Bracket, Panel Stop | other_service |
| 301A2727 | Handle , Control Box | other_service |
| 302-213 | 60-Cycle | other_service |
| 302-234 | .Cycle | other_service |
| 3028448 | Plate, Mater Face | other_service |
| 302P411 | 302P412 | other_service |
| 302P415 | Scale Reads 0-750 (I-Phase Use 2) | other_service |
| 302P421 | AC VOLTAGE RESISTOR METERS 600V | other_service |
| 302P422 | 302P423 | other_service |
| 302P423 | AC VOLTAGE RESISTOR METERS 1000V | other_service |
| 303-111 | Rheostat, Volt. Reg. - 175-Ohm, (Model H) | other_service |
| 303-32 | Knob, Rheos | other_service |
| 3040305 | 45, 000-Ohm, 10-W - For 480-V , 3-Ph, 3-Wire & 277/480-V, 3+ Ph. | other_service |
| 308-22 | Switch, Meter Selector | other_service |
| 309-0169 | 1 Begin Spec G 25 26 | other_service |
| 32082 | 3-Phase Models | other_service |
| 320B18 | Single Phase Models | other_service |
| 333-0639-01 | Heater, Coolant (4990 Watt) | other_service |
| 333-0639-02 | Heater, Coolant (6420 Watt) | other_service |
| 337A44 | Strap, Ground | other_service |
| 402-78 | Rubber, Mtg. - Cont. BOX to Mtg. Brkt. | other_service |
| 503-0197 | 503-0197 Miscellaneous Engine | other_service |
| 503-1575 | CE 1 155-1241 190351 CE 1 155-2409 1 155-2281 203432 CE 1 155-2287-02 3036377 CE 1 o | other_service |
| 504-0011 | Valve, Shutoff (1/2”) | other_service |
| 504-0028 | Valve, Radiator Drain | other_service |
| 505-0100 | Nipple, Pipe - Close (1/2”) | other_service |
| 526-0219 | Washer, Flat (1/2) | other_service |
| 800-0048 | Screw, Cap - Hex Head (3/8-16 x 3/4”) | other_service |
| 850-0050 | Washer, Lock - Spring (3/8”) | other_service |
| 870-0212 | Nut, Locking (1/4-20) | other_service |
| 960-0138 | other_service | |
| 960-0606 | other_service | |
| EXS-1046s | CONDENSATION TRAP | other_service |
| FP-855PREM | NH/NT855 Premium Cylinder Kits | other_service |
| FP-855TT | NT855 Premium 3-Ring Cylinder Kits | other_service |
| FP-855TTDN | NT855 Premium 3-Ring Cylinder Kits Dual-NI Pistons | other_service |
| FP-855TTP | NT855 Premium Plus 3-Ring Cylinder Kits | other_service |
| FP-855TTPDN | NT855 Premium Plus 3-Ring Cylinder Kits Dual-NI Pistons | other_service |
| FP-IFK855NR | NT855 Cylinder Kits w/ no piston rings | other_service |
| FP-IFK855PREM | NH/NT855 Premium Cylinder Kits | other_service |
| FP-IFK855TT | NT855 Premium 3-Ring Cylinder Kits | other_service |
| FP-IFK855TTDN | NT855 Premium 3-Ring Cylinder Kits Dual-NI Pistons | other_service |
| FP-IFK855TTP | NT855 Premium Plus 3-Ring Cylinder Kits | other_service |
| FP-IFK855TTPDN | NT855 Premium Plus 3-Ring Cylinder Kits Dual-NI Pistons | other_service |
| FP-KS12621C | NH/NT855 Cylinder Kit Std Head Gask Grommets | other_service |
| FP-KS12621C7 | NH/NT855 Cylinder Kit .010 Head Gask Grommets | other_service |
| FS1692s | FUEL SOLENOID VALVE LOCATION | other_service |
| M-1808 | DC CONTROL WIRING | other_service |
| TB11-29 | Engine Monitor Board | other_service |
| TB11-30 | Engine Monitor Board | other_service |
| TB11-31 | Engine Monitor Board | other_service |
| 234C134 | 3-Phase | phase |
| 234C137 | 3-Phase | phase |
| 234C140 | Single Phase | phase |
| 234C141 | Single Phase | phase |
| 305P233 | Rectifier Only, Power (Field) - Lower two - Negative (Begin Spec 'C' included in Rectifier & Reactor Assembly #305B227) | rectifier |
| 305P234 | Rectifier Assy., Power (Field) (Incl. in Rect. #305P218) | rectifier |
| 305P240 | Rectifier, Volt. Cont.Reactor (Incl.in Rect. & Resistor A: 305P218) | rectifier |
| 3ISA78 | Rectifier, Voltage Control | rectifier |
| 307-2621-02 | Relay, Start Solenoid (K4) | relay |
| 3044125 | 15,000-Ohm, 25-W - For 220/380-V, 3-Phase, 4-Wire | resistor |
| 304PA76 | Resistor, Volt. Cont.Reactor (Incl.in Rect.& Resistor A: 305P218) | resistor |
| 3058227 | Resistor Assy., Rect, & Incl. (Incl.in Rect. & Resistor A: 305P218) | resistor |
| 204493 | Ring, Collector | ring |
| 800-0092 | Screw, Cap - Hex Head (1/2-13 x 1.5) | screw |
| DM-3010461 | Crankshaft Rear Seal - NT855, NTC855 | seal |
| 193-0108 | Sender, Oil Pressure | sensor |
| 193-0244 | Sender, Oil Pressure (E1) | sensor |
| 193-0432 | Sender, Oil Temperature (S2 Engine Block, E4 Oil Pan) | sensor |
| 193-0447-01 | Sender, Water Temperature (E2) | sensor |
| 193-0448 | Sender, Oil Pressure (Includes Parts Marked *) | sensor |
| 309-0178 | Sender, Water Temperature | sensor |
| 309-0269 | Air Cleaner (Includes Element) - Standard | sensor |
| 309-0576 | Switch, Thermostat - High Engine Coolant Temperature (S2) | sensor |
| 309-0641-07 | Switch, Oil Pressure (Closes at 20 lbs. Descending) | sensor |
| 960-0504 | PCC Control Service Manual | service_manual |
| 960-0507 | Detector Control Service Manual | service_manual |
| 191-0852 | Starter (24 Volt) | starter |
| 191-1858 | Starter (24VDC) | starter |
| 3320645 | Strip, Marker - Volt. Con. Reactor (9305P218) | strip |
| 5208190 | Stud, Fixed Resistor Mtg. | stud |
| 23201396 | Support, Gen. Mtg. | support |
| 1S0A717 | Switch Assy., Overspeed | switch |
| B-342-3s | PRIMING TURBOCHARGER OIL SUPPLY INLET LINE. DISCONNECT AT THIS POINT TO PRIME | turbocharger |
| 304A15 | S Washer, Fixed Resistor Cent. to Alternator End Bell | washer |
| 508-0292 | Washer, Sealing - Copper | washer |
| 526-0029 | *Washer, Flat (1/2") | washer |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.
The Cummins/Onan NT855-F3 engine has an oil capacity of 28.8 liters.
The Cummins/Onan NT855-F3 has a displacement of 14.0 liters with 6 cylinders.
The Cummins/Onan NT855-F3 powers 1 generator set(s), including Cummins/Onan FIRE PUMP NT855-F3 BIG CAM.