Specifications
| Fuel | Diesel |
|---|---|
| Frequency | 50.0 Hz |
| Standby power | 28 kW |
| Oil capacity | 11.5 L |
| Voltage options | 12 V |
| Phase | 1 or 3 |
| Battery voltage | 12 VDC V |
| Battery quantity | 1 |
Engine
| Oil capacity | 11.5 L |
|---|---|
| Coolant capacity | 21.0 L |
| Displacement | 3.92 L |
| Aspiration | naturally aspirated |
| Rated speed | 1800 rpm |
Maintenance & consumables
for the Cummins/Onan 4B3.9-G| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Air cleaner with dry element and restriction indicator | — | 250 hr | ||
| Fuel filter | Spin-on paper element fuel filters | — | |||
| Oil filter | Spin-on full flow lube oil filter | — | |||
| Battery | Lead acid batteries, cable and fitted tray | — | 180 hr | ||
| Belt | Dual flexible fuel lines and connectors | — | 250 hr | ||
| Coolant | — | ||||
| Coolant filter | — | ||||
| Oil | Change the oil and filter at the intervals recommended in the Maintenance Table. | — | |||
| Spark plug | Spark plugs | ×1 | — |
Common questions
What size generator is the Cummins/Onan 28DGBB?
The Cummins/Onan 28DGBB is rated 28 kW standby.
What engine is in the Cummins/Onan 28DGBB?
The Cummins/Onan 28DGBB is powered by the Cummins/Onan 4B3.9-G engine.
What fuel does the Cummins/Onan 28DGBB use?
The Cummins/Onan 28DGBB runs on Diesel.
What is the oil capacity of the Cummins/Onan 28DGBB?
The Cummins/Onan 4B3.9-G engine in the Cummins/Onan 28DGBB has an oil capacity of 11.5 liters.
Parts
2| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 982-0200 | Air Filter | 6 | Air filter | Amazon eBay |
| 965-0520 | Cooling Fan | 37 | Service part / kit | Amazon eBay |
Service, wear & replacement parts referenced for this model and its engine — confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.
Available documents
Parts manual — 0960-0210 I8 201512 (Cummins/Onan)Parts manual — 960-0207 Onan DGBB DGBC DGCA DGCB Parts Manual (7-1996) (Cummins/Onan)Parts manual — 960-0210C Onan DGBB DGBC DGCA DGCB Parts Manual (11-1998) (Cummins/Onan)