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 |
Filters for the Cummins/Onan 4B3.9-G
6Engine-mounted filters the filter manufacturers list for this engine family. These come from the engine, not from this generator set’s own parts list, so confirm against your serial number before ordering.
| System | Filter | Description | Cross-references | |
|---|---|---|---|---|
| Oil filter | P558616 | Lube Filter, Spin-On Full Flow | CUMMINS 3290712, CUMMINS 3890709, NAPA 1602, BALDWIN BT427 | KuduParts $11.00 FridayParts $13.20 |
| Fuel filter | P550440 | Fuel Filter, Spin-On Secondary | CUMMINS 3831063, CUMMINS 3890707, NAPA 3358, BALDWIN BF788 | FridayParts $356.80 |
| Fuel filter | P550974 | Fuel Filter, In-Line | CUMMINS 3826094, NAPA 3270, BLAW KNOX 0016481600, PERKINS 102601 | FridayParts $356.80 |
| Fuel / water separator | P551329 | Fuel Filter, Water Separator Spin-On Twist&Drain | CUMMINS 11E170210, CUMMINS 3890063, NAPA 3357, BALDWIN BF1280 | FridayParts $151.00 |
| Fuel / water separator | P550248 | Fuel Filter, Water Separator Spin-On Twist&Drain | CUMMINS 1492827, CUMMINS 3286503, NAPA 3472, BALDWIN BF1226 | FridayParts $229.00 |
Listed for this engine in only one kind of machine, so they may depend on how the engine was installed:
| System | Filter | Description | Cross-references | |
|---|---|---|---|---|
| Coolant filter | P554071 | Coolant Filter, Spin-On | CUMMINS 209604, CUMMINS 209606, NAPA 4071, WALGAHN-MOTORENTECHN 00811412 | FridayParts $397.60 |
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.
What is the cooling system capacity of the Cummins/Onan 28DGBB?
The Cummins/Onan 28DGBB cooling system holds 21 liters (5.5 US gallons) for the engine, per the manufacturer specification sheet.
What voltage does the Cummins/Onan 28DGBB produce?
The Cummins/Onan 28DGBB is offered in 12 V, 1 or 3-phase.
What battery does the Cummins/Onan 28DGBB use?
The Cummins/Onan 28DGBB uses 1 battery, 12 VDC V each, per the manufacturer specification sheet.
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
This page was generated from the 3 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.