Specifications
| Fuel | Diesel |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 20 kW |
| Standby kVA | 20 |
| Prime power | 18 kW |
| Controller | PowerCommand 1.1 |
| Alternator | DS338-CPGK, DS340-CPGK, DS342-CPGK, DS339-CPGK, DS341-CPGK, DS343-CPGK (Class H insulation) |
| Voltage options | 120/240 V, 208 V, 277/480 V |
| Phase | 1/3 |
| Circuit breaker | 100 A |
| Battery cranking | 550 CCA |
| Battery voltage | 12V V |
| Battery quantity | 1 |
| Max ambient | 50 °C |
| Dimensions (L×W×H) | 1830×864×1156 mm |
| Dry weight | 442 kg |
| Wet weight | 511 kg |
| Sound level | 68.4 dBA @ 7 m |
| Fuel tank | 174.0 L |
Maintenance & consumables
for the Cummins/Onan V2203| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Dry replaceable element | — | |||
| Fuel filter | Spin on fuel filters with water separator | — | |||
| Oil filter | Spin on full flow filter, filtration efficiency 25 micron 99% (min) | — | |||
| Battery | Set mounted battery | — | |||
| Belt | N/A | — | |||
| Coolant | Antifreeze 50/50 (Ethylene glycol) | — | |||
| Oil | Cummins heavy-duty engine oil | — | |||
| Spark plug | N/A | — |
Service specifications
10| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Other | AFLEX-H (shake table test datum) | <=3.200 | g | AC156, tri-axial, 5% damping SRS |
| Other | AFLEX-V (shake table test datum) | <=1.333 | g | AC156, tri-axial, 5% damping SRS |
| Other | ARIG-H (shake table test datum) | <=2.400 | g | AC156, tri-axial, 5% damping SRS |
| Other | ARIG-V (shake table test datum) | <=0.533 | g | AC156, tri-axial, 5% damping SRS |
| Other | Ground snow load limit | 30 | psf | For indoor (covered) and outdoor (exposed) installation |
| Other | Horizontal design seismic coefficient (z/h = 0.0) | 1.440 | g | Certified seismic design level, IBC Importance IP <= 1.5, Soil Classes A-E, Risk Categories I-IV, Design Categories A-F, SDS <= 2.000 g |
| Other | SDS (g) at z/h=1 for C10 D6 - C60 D6 | 2.0 | g | Certified SDS, z/h = 1 |
| Other | SDS (g) at z/h=1 for C50 D6C - C125 D6C | 2.5 | g | Certified SDS, z/h = 1 |
| Other | ZPA-H (shake table test datum) | <=2.160 | g | AC156, tri-axial, 5% damping SRS |
| Other | ZPA-V (shake table test datum) | <=0.480 | g | AC156, tri-axial, 5% damping SRS |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Common questions
What is the power rating of the Cummins/Onan C20 D6?
The Cummins/Onan C20 D6 is rated 20 kW standby (20.0 kVA).
What engine is in the Cummins/Onan C20 D6?
The Cummins/Onan C20 D6 is powered by the Cummins/Onan V2203 engine.
Is the Cummins/Onan C20 D6 diesel or gas?
The Cummins/Onan C20 D6 runs on Diesel.
What alternator comes on the Cummins/Onan C20 D6?
The Cummins/Onan C20 D6 uses a DS338-CPGK, DS340-CPGK, DS342-CPGK, DS339-CPGK, DS341-CPGK, DS343-CPGK alternator. Insulation class H.
Troubleshooting
6Symptoms & remedies
| Symptom | Remedy |
|---|---|
| Emergency stop signal is received | The generator set immediately shuts down and cannot run or crank with the E-stop switch engaged. |
| Time delay of 0-600 seconds prior to shutdown after signal to stop in normal operation modes | Default for both time delay periods is 0 seconds. |
| Undervoltage sensor pickup and dropout adjustable from 85-100% and 75-98% | Dropout adjustable delay from 0.1-30 sec. |
| Overvoltage sensor dropout adjustable from 105-135% of nominal | Dropout adjustable delay from 0.5-120 sec. |
| Over/under frequency sensor underfrequency sensing pickup and dropout adjustable from 85-100% and 70-85% | Dropout adjustable delay from 0.1-15 sec. |
| Over/under frequency sensor overfrequency sensing dropout adjustable from 105-115% of nominal | Dropout adjustable delay from 0.1-15 sec. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing. Full Cummins/Onan C20 D6 troubleshooting guide (11 entries) →
Parts
23model family| Part # | Description | Qty | System | |
|---|---|---|---|---|
| A028U604 | Seal, Wire | 1 | Seal | Amazon eBay |
| A028X493 | Sender, Oil Pressure | 1 | Sensor | Amazon eBay FridayParts $52.50 |
| A044J187 | Sensor, Magnetic Pickup | 1 | Sensor | Amazon eBay |
| A047B582 | Gasket (Return Flange) | 1 | Gasket | Amazon eBay |
| A047B794 | Pump, Oil - Assy. | 1 | Pump | Amazon eBay |
| A047B821 | Gear (Oil Pump Drive) | 1 | Pump | Amazon eBay |
| A048W228 | Pump - See Pages 118 for Components) | 1 | Pump | Amazon eBay |
| A042R110 | Strap, Electrical | 1 | Service part / kit | Amazon eBay |
| A042S971 | Support, Engine | 2 | Service part / kit | Amazon eBay |
| A043V133 | Lead, Battery | 1 | Service part / kit | Amazon eBay |
| A043V162 | Lead, Battery | 1 | Service part / kit | Amazon eBay |
| A044G337 | Harness, Genset | 1 | Service part / kit | Amazon eBay |
| A045A448 | Support, Engine | 1 | Service part / kit | Amazon eBay |
| A045R226 | Screw, Hex Flange Head | 4 | Service part / kit | Amazon eBay |
| A045T315 | Fan, Radiator | 1 | Service part / kit | Amazon eBay |
| A047B436 | Guide, Valve (Inlet) | 3 | Service part / kit | Amazon eBay |
| A047B440 | Guide, Exhaust Valve | 3 | Service part / kit | Amazon eBay |
| A047B471 | Seat, Valve (Inlet) | 3 | Service part / kit | Amazon eBay |
| A047B484 | Seat, Exhaust Valve | 3 | Service part / kit | Amazon eBay |
| A047B760 | Filter, Oil | 1 | Service part / kit | Amazon eBay |
| A047G893 | Screw, Hex Head | 1 | Service part / kit | Amazon eBay |
| A048G929 | Label, Warning | 1 | Service part / kit | Amazon eBay |
| AC156 | ISO 17025 Laboratory | Service part / kit | Amazon eBay |
Compiled from this model's family documentation — may include parts for closely-related variants. Confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.
Fuel consumption
| Rating | Load | L/h | gal/h |
|---|---|---|---|
| Standby | 50% | 3.68 | 0.97 |
| Standby | 100% | 6.85 | 1.81 |
Available documents
Spec sheet (Cummins/Onan)Spec sheet — NAS-5869-EN (Cummins/Onan)Spec sheet — SS26-CPGK (Cummins/Onan)Reference — 102S-103387 (The VMC Group)Parts manual — C60D6 Parts Manual (Cummins/Onan)