The Cummins/Onan NT855 engine line groups 11 variant designations. Parts and fitment are pooled here so a cross-reference found on one variant surfaces for the whole family.
| Part # | Description | Category |
|---|---|---|
| 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 | Air filter |
| 140-2391 | Element - Air Cleaner (Standard) | Air filter |
| 8342-1 | AIR FILTER | Air filter |
| CS-1382c | INLET AIR DAMPER | Air filter |
| ES-1214-2 | FLOAT SWITCH | Air filter |
| 191-1982 | Pulley, Alternator | Alternator |
| 191-1983-02 | Alternator, 24 Volt Spec B-O (Prestolite) | Alternator |
| A956 | 2-12 VOLT BATTERIES | Battery |
| 2110153 | Bell, End - Alt, to Exciter | Bell |
| 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 |
| 234070 | Rig Assy., Brush- Incl. Brushes, & Contact Point Band, Gen. - Front Portion(Narrow) | Brush |
| 2I4AM | Brush | Brush |
| 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 |
| 232A1817 | Generator | Generator |
| 502-0827 | Fitting, Hose – Barbed (1/2” ID Pipe to 3/4” ID Hose) | Hose |
| 503-0189 | Clamp, Hose | Hose |
| 503-1634-01 | Hose, Rubber (3/4” ID x 4”) | Hose |
| 302P465 | RESISTOR-STABILIZING | Meter |
| 302P466 | For 220/380-V, 3-Ph, 60-Cycle (Model H) | 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 |
| 102-1335 | Plug, Oil Drain | Service part / kit |
| 130-3588 | Cap, Radiator | Service part / kit |
| 130-4355 | Radiator (2 Row Core) DFBJ | Service part / kit |
| 130-4355-01 | Radiator (3 Row Core) DFCF, DFCG | Service part / kit |
| 130-4369 | Radiator DFCH | Service part / kit |
| 155-2409-01 | Elbow, Exhaust (5" OD With Threads) | Service part / kit |
| 191-1981 | Genset component (SJB series) | Service part / kit |
| 191-2121 | Regulator, Voltage | Service part / kit |
| 232A1489 | Generator support shim, 0.598 in gauge #6, 3x3 | Service part / kit |
| 232A1490 | Generator support shim, 0.359 in gauge #20, 3x3 | Service part / kit |
| 301021151 | Box Only, control | Service part / kit |
| 30118301 | Bracket, Cont.Box Mtg. (Repl. 2-Piece Brkts) | Service part / kit |
| 301A1914 | Bracket, Panel Stop | Service part / kit |
| 301A2727 | Handle , Control Box | Service part / kit |
| 302-213 | 60-Cycle | Service part / kit |
| 302-234 | .Cycle | Service part / kit |
| 3028448 | Plate, Mater Face | Service part / kit |
| 302P411 | ~~ Scale Reads 0-200 (1-Phase Use 2) | Service part / kit |
| 302P412 | Scale Reads 0-250 | Service part / kit |
| 302P414 | Amm, Scale Reads 0-300 - Replaces 302-14. | Service part / kit |
| 302P415 | Ammeter Scale Reads 0-500 - Replaces 302-371. | Service part / kit |
| 302P422 | Scale Reads 0-600 | Service part / kit |
| 302P423 | Scale Reads 0-750 on side of Gen | Service part / kit |
| 302P467 | For 277/480 Volt,3 Phase, 60 Cycle Plants. | Service part / kit |
| 303-111 | Rheostat, Volt. Reg. - 175-Ohm, (Model H) | Service part / kit |
| 303-32 | Knob, Rheos | Service part / kit |
| 3040305 | 45, 000-Ohm, 10-W - For 480-V , 3-Ph, 3-Wire & 277/480-V, 3+ Ph. | Service part / kit |
| 307-2621-02 | Relay, Start Solenoid (K4) | Service part / kit |
| 308-22 | Switch, Volt. & Current Selector Ammeter | Service part / kit |
| 32082 | 3-Phase Models | Service part / kit |
| 320B18 | Single Phase Models | Service part / kit |
| 333-0639-01 | Heater, Coolant (4990 Watt) | Service part / kit |
| 333-0639-02 | Heater, Coolant (6420 Watt) | Service part / kit |
| 337A44 | Strap, Ground | Service part / kit |
| 402-78 | Rubber, Mtg. - Cont. Box | Service part / kit |
| 503-1575 | Clamp, V-Band | Service part / kit |
| 504-0011 | Valve, Shutoff (1/2”) | Service part / kit |
| 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”) | Service part / kit |
| 505-0100 | Nipple, Pipe - Close (1/2”) | Service part / kit |
| 526-0029 | *Washer, Flat (1/2") | Service part / kit |
| 526-0219 | Washer, Flat (1/2) | Service part / kit |
| 800-0048 | Screw, Cap - Hex Head (3/8-16 x 3/4”) | Service part / kit |
| 800-0092 | Screw, Cap - Hex Head (1/2-13 x 1.5) | Service part / kit |
| 850-0050 | Washer, Lock - Spring (3/8”) | Service part / kit |
| 870-0212 | Nut, Locking (1/4-20) | Service part / kit |
| 903-0124 | NA | Service part / kit |
| 903-0204 | NA | Service part / kit |
| 903-0500 | NA | Service part / kit |
| 903-0604 | NA | Service part / kit |
| EXS-1046s | CONDENSATION TRAP | Service part / kit |
| FS1692s | FUEL SOLENOID VALVE LOCATION | Service part / kit |
| M-1808 | DC CONTROL WIRING | Service part / kit |
| TB11-29 | Engine Monitor Board | Service part / kit |
| TB11-30 | Engine Monitor Board | Service part / kit |
| TB11-31 | Engine Monitor Board | Service part / kit |
| 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 |
| 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 |
| 508-0292 | Washer, Sealing - Copper | Seal |
| 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 | Sensor |
| 309-0269 | Sender, Temperature-Lo Engine | Sensor |
| 309-0576 | Switch, Thermostat - High Engine Coolant Temperature (S2) | Sensor |
| 309-0641-03 | Switch, Low Oil Pressure (S110) | 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 |
| 191-1858 | 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 |
| 302P421 | Scale Reads 0-300 | Voltmeter |
| 304A15 | S Washer, Fixed Resistor Cent. to Alternator End Bell | Washer |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.
Leads compiled from supplier catalogs across the family’s variants; verify the exact part for your variant and serial number.