HomeCummins/OnanCummins/Onan DGBB

Cummins/Onan DGBB Generator Set

The Cummins/Onan DGBB is a 35 kW (44 kVA) Diesel standby generator set powered by a Cummins/Onan 4B3.9 engine. It is available at 600 V, 3-phase and 60 Hz. It holds about 11 L (2.9 gal) of oil and 21 L (5.5 gal) of coolant. Starting uses 1 group-4 battery rated 1080 CCA at 12 V. The set measures 3188×1067×1753 mm (125.5×42.0×69.0 in), weighs about 1667 kg (3675 lb) and produces 68 dBA at 7 m. An integrated tank holds 341 L (90.1 gal), roughly 11 hours of runtime.

35 kW
Standby
11.0 L
Oil capacity
4
Document types

How to read your Cummins/Onan serial & model number →

Specifications

FuelDiesel
Frequency60.0 Hz
Standby power35 kW
Standby kVA44
Prime power28 kW
ControllerDetector, PCC, PowerCommand, PowerCommand 2100, PowerCommand 3100, PowerCommand PCC2100
Oil capacity11.0 L
AlternatorCummins/Onan 12-lead reconnectable alternator fitted with voltage selection switch
Voltage options12 V
Phase3-phase
Battery group4
Battery cranking1080 CCA
Battery voltage12 V
Battery quantity1
Coolant capacity21.0 L
Dimensions (L×W×H)3188×1067×1753 mm
Dry weight757 kg
Sound level68.0 dBA @ 7 m
Fuel tank24.0 L
Tank runtime11.0 hr

Engine

Cummins/Onan 4B3.9
Oil capacity11.0 L
Coolant capacity21.0 L

Maintenance & consumables

for the Cummins/Onan 4B3.9
ItemSpecCapacityPart #Interval
Air filterCummins engine Operation and Maintenance Manual8760 hr find
Fuel filterCummins engine Operation and Maintenance Manual50 hr find
Oil filterCummins engine Operation and Maintenance Manual500 hr find
BeltCummins engine Operation and Maintenance Manual find
CoolantCummins engine Operation and Maintenance Manual
Coolant filter find
OilCummins engine Operation and Maintenance Manual500 hr

Common questions

What is the power rating of the Cummins/Onan DGBB?

The Cummins/Onan DGBB is rated 35 kW standby (44.0 kVA).

What engine does the Cummins/Onan DGBB use?

The Cummins/Onan DGBB is powered by the Cummins/Onan 4B3.9 engine.

What fuel does the Cummins/Onan DGBB use?

The Cummins/Onan DGBB runs on Diesel.

What is the oil capacity of the Cummins/Onan DGBB?

The Cummins/Onan 4B3.9 engine in the Cummins/Onan DGBB has an oil capacity of 11.0 liters.

What alternator does the Cummins/Onan DGBB use?

The Cummins/Onan DGBB uses a Cummins/Onan 12-lead reconnectable alternator fitted with voltage selection switch alternator.

Troubleshooting

72

Fault codes

CodeMeaningRemedy
F01Generator does not start.Check the battery voltage and ensure it is above 12V. Verify that the fuel supply is adequate and check for any fuel system issues. Refer to the Fault Code Table for further troubleshooting.
F02Generator produces low output power.Check the air filter for blockage or damage. Verify that the fuel supply is adequate and check for any fuel system issues. Refer to the Fault Code Table for further troubleshooting.
F03Generator produces excessive noise.Check the engine oil level and ensure it is within the recommended range. Verify that all components are properly tightened, including bolts and nuts. Refer to the Fault Code Table for further troubleshooting.
F04Generator produces excessive vibration.Check the engine mounts for any damage or wear. Verify that all components are properly tightened, including bolts and nuts. Refer to the Fault Code Table for further troubleshooting.
F05Generator produces excessive exhaust smoke.Check the air filter for blockage or damage. Verify that the fuel supply is adequate and check for any fuel system issues. Refer to the Fault Code Table for further troubleshooting.
F06Generator produces excessive heat.Check the cooling system for any leaks or blockages. Verify that the coolant level is within the recommended range. Refer to the Fault Code Table for further troubleshooting.
F07Generator produces excessive oil consumption.Check the engine oil level and ensure it is within the recommended range. Verify that all components are properly tightened, including bolts and nuts. Refer to the Fault Code Table for further troubleshooting.
F08Generator produces excessive fuel consumption.Check the air filter for blockage or damage. Verify that the fuel supply is adequate and check for any fuel system issues. Refer to the Fault Code Table for further troubleshooting.
121Speed Signal Lost
135Oil Pressure Sensor High
141Oil Pressure Sensor Low
143Pre-Low Oil Pressure Sensor
144Coolant Temperature Sensor High
145Coolant Temperature Sensor Low
146Pre-High Cool Temp
151High Coolant Temp
197Low Coolant Level
234Overspeed
235Low Coolant Level
359Fail to Start
415Low Oil Pressure
441Low Battery Voltage
442High Battery Voltage
1123Shutdown After Battle Short
1124Delayed Shutdown
1131Battle Short Active
1244Engine Normal Shutdown
1311Customer Inputs #1
1312Customer Inputs #2
1317Customer Inputs #3
1318Customer Inputs #4
1334Crit Scaler OR
1335Non-Crit Scaler OR
1416Fail to Shutdown
1417Power Down Failure
1433Emergency Stop
1434Remote Emergency Stop
1435Low Coolant Temperature
1438Fail to Crank
1442Weak Battery
1443Battery Failed
1444KW Overload
1445Short Circuit
1446High AC Voltage
1447Low AC Voltage
1448Under Frequency
1449Over Frequency
1461Loss of Field
1466Modem Failure
1468Network Error
1469Speed/Hz Match
1471Over Current
1472Over Current
2335Excitation Fault
2336Memory Error
2341High Control Temperature
2342Too Long in Idle
2967Governor Fault
2968AVR Fault
2969LON Failure
2972Field Overload

Symptoms & remedies

SymptomCauseRemedy
Generator does not startCheck the fault codes and refer to the troubleshooting table for specific issues. Ensure that all connections are secure, and the control panel is powered on.
Generator produces low voltage outputRefer to the fault codes and troubleshooting table for possible causes such as a faulty alternator or incorrect settings. Check the generator's load and ensure it is within the rated capacity.
Generator produces high voltage outputRefer to the fault codes and troubleshooting table for possible causes such as a faulty alternator or incorrect settings. Check the generator's load and ensure it is within the rated capacity.
Generator produces inconsistent voltage outputRefer to the fault codes and troubleshooting table for possible causes such as a faulty alternator or incorrect settings. Check the generator's load and ensure it is within the rated capacity.
Generator produces inconsistent frequency outputRefer to the fault codes and troubleshooting table for possible causes such as a faulty alternator or incorrect settings. Check the generator's load and ensure it is within the rated capacity.
Generator produces noise during operationRefer to the fault codes and troubleshooting table for possible causes such as a faulty alternator or incorrect settings. Check the generator's load and ensure it is within the rated capacity.
Generator produces excessive heatRefer to the fault codes and troubleshooting table for possible causes such as a faulty alternator or incorrect settings. Check the generator's load and ensure it is within the rated capacity.
Generator produces smokeRefer to the fault codes and troubleshooting table for possible causes such as a faulty alternator or incorrect settings. Check the generator's load and ensure it is within the rated capacity.
The engine does not startThe starter will disengage after a specified period of time and the control will indicate an overcrank shutdown.Place the O/Manual/Auto switch in the O position and press the Fault Acknowledge/Reset button. Before attempting to restart, wait two minutes for the starter motor to cool and then repeat the starting procedure. If the engine does not run after a second attempt, refer to the Troubleshooting section.
Status Indicators are not functioning properly.Check the status indicators for any visible damage or loose connections. If the issue persists, refer to the Fault Code Table for further troubleshooting.
Line Circuit Breaker (Optional) trips frequently.Check the circuit breaker for any visible damage or loose connections. Verify that the generator's load is within the rated capacity of the circuit breaker.

Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.

Parts

6
Part #DescriptionQtySystem
928-0502BService part / kit PartsGeek
928-0506Service part / kit PartsGeek
960-0135Service part / kit PartsGeek
960-0504AService part / kit PartsGeek
960-0505Service part / kit PartsGeek
960-12Service part / kit PartsGeek

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.

Fuel consumption

RatingLoadL/hgal/h
Prime
Standby

Available documents

Spec sheet — s-1408 (Cummins/Onan)Spec sheet — s-1573 (Cummins/Onan)Operator's manual — 960-0107 Cummins DGBB DGCB DGDB DGFA Operator's Manual (7-2009) (Cummins/Onan)Operator's manual — Cummins-DGBB-DGBC-DGCA-DGCB-DGCG-DGFA-DGFB-DGFC-DGFS-operator-manual (Cummins/Onan)Parts manual — 0932-0112 Onan Post-Sale Literature Index (07-1998) (Cummins/Onan)Parts manual — 0960-0291 I7 201305 (Cummins/Onan)Parts manual — 960-0231 Onan DGB DGC Parts Manual (6-1993) (Cummins/Onan)Service manual — 0960-0210 I8 201512 (Cummins/Onan)Service manual — 900-0524B Onan DGxx Power Command Control 3100 Series Paralleling Gensets Operation & Service manual (01-2002) (Cummins/Onan)Service manual — 900-0907 Cummins DGxx Series Repair Times (Cummins/Onan)Service manual — 960-0505 Onan DGxx QSxx Detector Controls Generator Set Service Manual (04-2001) (Cummins/Onan)Service manual — 960-0510B Onan DGBB thru DGFC Series Service Manual (10-1998) (Cummins/Onan)Service manual — 960-0511B Cummins DGBB DGC DGD DGF Series Service Manual (10-2001) (Cummins/Onan)Service manual — 960-0518D Cummins DGBB DGC DGDA DGFB Series Service Manual (2-2004) (Cummins/Onan)Service manual — 960-0615C Cummins DGBB DGC DGFA Series Operator's Manual (10-2003) (Cummins/Onan)Service manual — 960-0618D Cummins DGBB DGCA DGEA DGFA Series Installation Manual (10-2001) (Cummins/Onan)Service manual — 960-0628D Cummins DGB DGC DGF Series Installation Manual (2-2004) (Cummins/Onan)Service manual — DG Generator Set Service Manual PCC 3100 (Cummins/Onan)