Specifications
| Fuel | Diesel |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 20 kW |
| Standby kVA | 25 |
| Prime power | 18 kW |
| Emissions | EPA Tier 4i |
| Controller | PC 1.1, PowerCommand 1.1 |
| Alternator | Cummins/Onan Brushless, 4 pole, drip proof, revolving field |
| Voltage options | 120/240 V, 120/208 V, 277/480 V, 347/600 V |
| Battery cranking | 550 CCA |
| Max ambient | 50 °C |
| Dimensions (L×W×H) | 1667×930×1282 mm |
| Dry weight | 442 kg |
Engine
| Displacement | 1.65 L |
|---|---|
| Aspiration | Naturally aspirated |
| Rated speed | 1800 rpm |
Maintenance & consumables
for the Cummins/Onan Kubota heavy-duty engine| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Dry replaceable element | — | find | ||
| Fuel filter | Spin on fuel filters with water separator | — | find | ||
| Oil filter | Spin on full flow filter, filtration efficiency 25 micron 99% (min) | — | find | ||
| Belt | N/A | — | find | ||
| Coolant | Antifreeze 50/50 (Ethylene glycol) | — | |||
| Oil | Cummins heavy-duty engine oil | — |
Common questions
What is the power rating of the Cummins/Onan C20 D6?
The Cummins/Onan C20 D6 is rated 20 kW standby (25.0 kVA).
What engine does the Cummins/Onan C20 D6 use?
The Cummins/Onan C20 D6 is powered by the Cummins/Onan Kubota heavy-duty engine engine.
What fuel does the Cummins/Onan C20 D6 use?
The Cummins/Onan C20 D6 runs on Diesel.
What alternator does the Cummins/Onan C20 D6 use?
The Cummins/Onan C20 D6 uses a Cummins/Onan Brushless, 4 pole, drip proof, revolving field alternator.
Troubleshooting
11Symptoms & 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. |
| Time delay start and stop (cooldown) configurable for time delay of 0-300 seconds prior to starting after receiving a remote start signal | Control provides retransfer time delays including time delay emergency to normal (0-1800 sec), programmed transition delay (0-600 sec), and time delay engine cooldown (0-3600 sec). |
| Low lube oil pressure warning/shutdown | Level is pre-set to match the capabilities of the engine used. Control includes time delays to prevent nuisance shutdown signals. |
| High coolant temperature warning/shutdown | Level is pre-set to match the capabilities of the engine used. Control includes time delays to prevent nuisance shutdown signals. |
| Low coolant temperature warning | Indicates that engine temperature may not be high enough for 1 min. and start or proper load acceptance. |
| Sensor failure indication | Logic is provided on the base control to detect analog sensor or interconnecting wiring failures. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Parts
1model family| Part # | Description | Qty | System | |
|---|---|---|---|---|
| AC156 | ISO 17025 Laboratory | Service part / kit | PartsGeek |
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 |
|---|---|---|---|
| Prime | |||
| Standby |
Available documents
Spec sheet — 0057984Spec sheet — 0058677 (Cummins/Onan)Spec sheet — 0069812Spec sheet — NAS-5869-EN (Cummins/Onan)Spec sheet — SS26-CPGK (Cummins/Onan)Reference — 102S-103387Reference — 51070-01