The Cummins/Onan NT855-G6 is an engine. It powers generator sets from Cummins/Onan, including the 275 DFBF, DFBF and DFBJ. It holds 40 L (10.6 gal) of oil and 64.4 L (17.0 gal) of coolant.
Part of the Cummins/Onan NT855 engine family — 5 variants share parts & fitment.
| Oil capacity | 40.0 L |
|---|---|
| Coolant capacity | 64.4 L |
| Part # | Description | Category |
|---|---|---|
| 140-2389 | Cleaner, Air (Includes Element) | air_filter |
| 140-2391 | Element, Air Cleaner | air_filter |
| 155-1035 | Cleaner, Air | air_filter |
| 503-0197 | Cap, Air Cleaner | air_filter |
| 503-0748 | Clamp, Hose - Air Cleaner | air_filter |
| CS-1198 | COOLANT FILTER | air_filter |
| CS-1382c | INLET AIR DAMPER | air_filter |
| ES-1214-2 | FLOAT SWITCH | air_filter |
| EXS-1036 | DRIP CAP | air_filter |
| 191-0688 | Alternator (24 Volt) | alternator |
| 191-0781 | Pulley, Alternator | alternator |
| 191-1981 | Fan, Alternator | alternator |
| 191-1982 | Pulley, Alternator | alternator |
| 191-1983-02 | Alternator (G1) | alternator |
| A956 | 24-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 |
| 2110153 | Bell, End - Alt, to Exciter | bell |
| 191-0725 | Guard, Alternator Belt | belt |
| 511-0084 | Belt, Alternator Drive | belt |
| 511-0092 | Belt, Alternator | belt |
| 805-35 | Bolt, Place - Gen. 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 |
| 234070 | Rig Assy., Brush- Incl. Brushes, & Contact Point Band, Gen. - Front Portion(Narrow) | brush |
| 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 |
| FS1803s | FUEL FILTERS | fuel_filter |
| 501-0087 | Hose, Vent | hose |
| 502-0827 | Barb, Hose (1/2 x 3/4) | hose |
| 503-0189 | Clamp, Hose | hose |
| 503-0354 | Clamp, Radiator Hose | hose |
| 503-0641 | Hose, Flexible Air Cleaner | hose |
| 503-0752 | Hose, Radiator | hose |
| 503-0756 | Hose, Radiator (Lower) | hose |
| 503-1634-01 | Hose, Rubber (3/4" ID x 4") | hose |
| PCC-3100 | LABEL | label |
| 505-0100 | Nipple, Pipe - Close (1/2”) | nipple |
| 870-0212 | Nut, Locking (1/4-20) | nut |
| 130-0843 | Bracket, Radiator Support | other_service |
| 130-0846 | Shroud, Radiator Fan | other_service |
| 130-0924 | Guard, Radiator Fan | 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 |
| 140-1347 | Cable, Battery Negative | other_service |
| 140-1349 | Cable, Battery Positive | 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 |
| 232A1817 | Generator | 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 | ~~ Scale Reads 0-200 (1-Phase Use 2) | other_service |
| 302P412 | Scale Reads 0-250 | other_service |
| 302P414 | Scale Reads 0-500 (1-Phase Use 2) | other_service |
| 302P415 | Scale Reads 0-750 (I-Phase Use 2) | other_service |
| 302P421 | Scale Reads 0-300 | other_service |
| 302P422 | Scale Reads 0-600 | other_service |
| 302P423 | Scale Reads 0-750 on side of Gen | other_service |
| 302P465 | RUNNING-TIME METERS 120-240V (1PH) | other_service |
| 302P466 | For 220/380-V, 3-Ph, 60-Cycle (Model H) | other_service |
| 302P467 | For 277/480-V, 3-Ph, 60-Cycle | other_service |
| 302P468 | For 120/208-V,120/240-V, & 347/600-V 3PH. 50 Cy!. (825-Ohm, 75-Watt) | other_service |
| 302P469 | For 220/380-V, 3Ph. 50-Cycle | other_service |
| 302P470 | For 277/480-V, 3-Ph, 50-Cyclo (5-P!) | 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 | Bracket, Panel Stop - Begin Spec C. | 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 | other_service |
| 503-1575 | Clamp, V-Band | other_service |
| 504-0028 | Cock, Radiator Drain | other_service |
| 960-0138 | other_service | |
| 960-0606 | other_service | |
| CS-1366 | WIND BARRIER | other_service |
| EXS-1046s | CONDENSATION TRAP | 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 |
| 102-1335 | Plug, Oil Drain | plug |
| 305P233 | Rectifier Assy., Power (Incl. two #305P234 wire & hardware) | 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 |
| 800-0048 | Screw, Cap - Hex Head (3/8-16 x 3/4”) | screw |
| 800-0092 | Screw, Cap - Hex Head (1/2-13 x 1.5) | screw |
| 193-0108 | Sender, Oil Pressure Gauge | sensor |
| 193-0244 | Sender, Water Temperature | 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 (E1) | sensor |
| 309-0169 | 1 Begin Spec G 25 26 | sensor |
| 309-0178 | Sender, Water Temperature | sensor |
| 309-0576 | Switch, Thermostat - High Engine Coolant Temperature (S2) | sensor |
| 309-0641-03 | Switch, Oil Pressure (S1) | sensor |
| 309-0641-07 | Switch, Oil Pressure - Pre-Alarm (S5) | 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 |
| 309-0269 | Air Cleaner (Includes Element) - Standard | switch |
| CS-1367 | THERMOSTAT | thermostat |
| B-342-3s | PRIMING TURBOCHARGER OIL SUPPLY INLET LINE. DISCONNECT AT THIS POINT TO PRIME | turbocharger |
| 504-0011 | Valve, Shutoff (1/2”) | valve |
| 304A15 | S Washer, Fixed Resistor Cent. to Alternator End Bell | washer |
| 508-0292 | Washer, Sealing - Copper | washer |
| 526-0029 | Washer, Flat (3/8) | washer |
| 526-0219 | Washer, Flat (1/2) | washer |
| 850-0050 | Washer, 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.
The Cummins/Onan NT855-G6 engine has an oil capacity of 40.0 liters.
The Cummins/Onan NT855-G6 powers 3 generator set(s), including Cummins/Onan 275 DFBF, Cummins/Onan DFBF, Cummins/Onan DFBJ.