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Home›Engines›Cummins/Onan NT855-F3

Cummins/Onan NT855-F3 Engine Engine

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.

Part of the Cummins/Onan NT855 engine family — 5 variants share parts & fitment.

14.0 L
Displacement
6
Cylinders
2100 rpm
Rated speed
224 kW
Gross power

Engine specifications

Oil capacity28.8 L
Coolant capacity39.7 L
Displacement14.0 L
Cylinders6
AspirationTurbocharged
Rated speed2100 rpm
Gross power224 kW

Generator sets powered by this engine

1
Cummins/Onan FIRE PUMP NT855-F3 BIG CAM

Parts cataloged across the Cummins/Onan NT855 family

141
Part #DescriptionCategory
140-2389Cleaner, Air (Includes Element)air_filter
140-2391Element, Air Cleanerair_filter
155-1035Cleaner, Airair_filter
503-0197Cap, Air Cleanerair_filter
503-0748Clamp, Hose - Air Cleanerair_filter
CS-1198COOLANT FILTERair_filter
CS-1382cINLET AIR DAMPERair_filter
ES-1214-2FLOAT SWITCHair_filter
EXS-1036DRIP CAPair_filter
191-0688Alternator (24 Volt)alternator
191-0781Pulley, Alternatoralternator
191-1981Fan, Alternatoralternator
191-1982Pulley, Alternatoralternator
191-1983-02Alternator (G1)alternator
A95624-volt battery current is required for starting purposes, Use two 12-volt type 8 D batteries for a normal installation, Connect the batteries in series (negative post of first battery to positive post of second)battery
2110153Bell, End - Alt, to Exciterbell
191-0725Guard, Alternator Beltbelt
511-0084Belt, Alternator Drivebelt
511-0092Belt, Alternatorbelt
805-35Bolt, Place - Gen. Mtg. support to End Bellbolt
1S0A713Bracket, Overspeed Switchbracket
2348115Bracket, Mtg. - Volt. Cont. Reactorbracket
234875Bracket, Gate Reactor Mtg.bracket
319-2236Bracket, Mountingbracket
234070Rig Assy., Brush- Incl. Brushes, & Contact Point Band, Gen. - Front Portion(Narrow)brush
2I4AMBrushbrush
505-0019Bushing, Pipe - Reducer 1/2” to 3/8”, DFBF (1/2” to 3/8”) 505-0131 DFCB, DFCC, DFCE (3/4” to 3/8”)bushing
518-0548-58Clamp, Hoseclamp
2340116Cover, Excitercover
FS1803sFUEL FILTERSfuel_filter
501-0087Hose, Venthose
502-0827Barb, Hose (1/2 x 3/4)hose
503-0189Clamp, Hosehose
503-0354Clamp, Radiator Hosehose
503-0641Hose, Flexible Air Cleanerhose
503-0752Hose, Radiatorhose
503-0756Hose, Radiator (Lower)hose
503-1634-01Hose, Rubber (3/4" ID x 4")hose
PCC-3100LABELlabel
505-0100Nipple, Pipe - Close (1/2”)nipple
870-0212Nut, Locking (1/4-20)nut
130-0843Bracket, Radiator Supportother_service
130-0846Shroud, Radiator Fanother_service
130-0924Guard, Radiator Fanother_service
130-0992Radiatorother_service
130-3588Cap, Radiatorother_service
130-4355Radiator (2 Row Core) DFBJother_service
130-4355-01Radiator (3 Row Core) DFCF, DFCGother_service
130-4369Radiator DFCHother_service
140-1347Cable, Battery Negativeother_service
140-1349Cable, Battery Positiveother_service
155-2409-01Elbow, Exhaust (5" OD With Threads)other_service
191-1141Bracket, Alternator Mountingother_service
191-2121Regulator, Voltageother_service
232A1489Generator support shim, 0.598 in gauge #6, 3x3other_service
232A1490Generator support shim, 0.359 in gauge #20, 3x3other_service
232A1817Generatorother_service
301021151Box Only, controlother_service
30118301Bracket, Cont.Box Mtg. (Repl. 2-Piece Brkts)other_service
301A1914Bracket, Panel Stopother_service
301A2727Handle , Control Boxother_service
302-21360-Cycleother_service
302-234.Cycleother_service
3028448Plate, Mater Faceother_service
302P411~~ Scale Reads 0-200 (1-Phase Use 2)other_service
302P412Scale Reads 0-250other_service
302P414Scale Reads 0-500 (1-Phase Use 2)other_service
302P415Scale Reads 0-750 (I-Phase Use 2)other_service
302P421Scale Reads 0-300other_service
302P422Scale Reads 0-600other_service
302P423Scale Reads 0-750 on side of Genother_service
302P465RUNNING-TIME METERS 120-240V (1PH)other_service
302P466For 220/380-V, 3-Ph, 60-Cycle (Model H)other_service
302P467For 277/480-V, 3-Ph, 60-Cycleother_service
302P468For 120/208-V,120/240-V, & 347/600-V 3PH. 50 Cy!. (825-Ohm, 75-Watt)other_service
302P469For 220/380-V, 3Ph. 50-Cycleother_service
302P470For 277/480-V, 3-Ph, 50-Cyclo (5-P!)other_service
303-111Rheostat, Volt. Reg. - 175-Ohm, (Model H)other_service
303-32Knob, Rheosother_service
304030545, 000-Ohm, 10-W - For 480-V , 3-Ph, 3-Wire & 277/480-V, 3+ Ph.other_service
308-22Bracket, Panel Stop - Begin Spec C.other_service
320823-Phase Modelsother_service
320B18Single Phase Modelsother_service
333-0639-01Heater, Coolant (4990 Watt)other_service
333-0639-02Heater, Coolant (6420 Watt)other_service
337A44Strap, Groundother_service
402-78Rubber, Mtg. - Cont. Boxother_service
503-1575Clamp, V-Bandother_service
504-0028Cock, Radiator Drainother_service
960-0138other_service
960-0606other_service
CS-1366WIND BARRIERother_service
EXS-1046sCONDENSATION TRAPother_service
FS1692sFUEL SOLENOID VALVE LOCATIONother_service
M-1808DC CONTROL WIRINGother_service
TB11-29Engine Monitor Boardother_service
TB11-30Engine Monitor Boardother_service
TB11-31Engine Monitor Boardother_service
234C1343-Phasephase
234C1373-Phasephase
234C140Single Phasephase
234C141Single Phasephase
102-1335Plug, Oil Drainplug
305P233Rectifier Assy., Power (Incl. two #305P234 wire & hardware)rectifier
305P234Rectifier Assy., Power (Field) (Incl. in Rect. #305P218)rectifier
305P240Rectifier, Volt. Cont.Reactor (Incl.in Rect. & Resistor A: 305P218)rectifier
3ISA78Rectifier, Voltage Controlrectifier
307-2621-02Relay, Start Solenoid (K4)relay
304412515,000-Ohm, 25-W - For 220/380-V, 3-Phase, 4-Wireresistor
304PA76Resistor, Volt. Cont.Reactor (Incl.in Rect.& Resistor A: 305P218)resistor
3058227Resistor Assy., Rect, & Incl. (Incl.in Rect. & Resistor A: 305P218)resistor
204493Ring, Collectorring
800-0048Screw, Cap - Hex Head (3/8-16 x 3/4”)screw
800-0092Screw, Cap - Hex Head (1/2-13 x 1.5)screw
193-0108Sender, Oil Pressure Gaugesensor
193-0244Sender, Water Temperaturesensor
193-0432Sender, Oil Temperature (S2 Engine Block, E4 Oil Pan)sensor
193-0447-01Sender, Water Temperature (E2)sensor
193-0448Sender, Oil Pressure (E1)sensor
309-01691 Begin Spec G 25 26sensor
309-0178Sender, Water Temperaturesensor
309-0576Switch, Thermostat - High Engine Coolant Temperature (S2)sensor
309-0641-03Switch, Oil Pressure (S1)sensor
309-0641-07Switch, Oil Pressure - Pre-Alarm (S5)sensor
960-0504PCC Control Service Manualservice_manual
960-0507Detector Control Service Manualservice_manual
191-0852Starter (24 Volt)starter
191-1858Starter (24VDC)starter
3320645Strip, Marker - Volt. Con. Reactor (9305P218)strip
5208190Stud, Fixed Resistor Mtg.stud
23201396Support, Gen. Mtg.support
1S0A717Switch Assy., Overspeedswitch
309-0269Air Cleaner (Includes Element) - Standardswitch
CS-1367THERMOSTATthermostat
B-342-3sPRIMING TURBOCHARGER OIL SUPPLY INLET LINE. DISCONNECT AT THIS POINT TO PRIMEturbocharger
504-0011Valve, Shutoff (1/2”)valve
304A15S Washer, Fixed Resistor Cent. to Alternator End Bellwasher
508-0292Washer, Sealing - Copperwasher
526-0029Washer, Flat (3/8)washer
526-0219Washer, Flat (1/2)washer
850-0050Washer, Lock - Spring (3/8”)washer

Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.

Common questions

What is the oil capacity of the Cummins/Onan NT855-F3?

The Cummins/Onan NT855-F3 engine has an oil capacity of 28.8 liters.

What is the displacement of the Cummins/Onan NT855-F3?

The Cummins/Onan NT855-F3 has a displacement of 14.0 liters with 6 cylinders.

Which generators use the Cummins/Onan NT855-F3 engine?

The Cummins/Onan NT855-F3 powers 1 generator set(s), including Cummins/Onan FIRE PUMP NT855-F3 BIG CAM.