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Home›Cummins/Onan›Cummins/Onan DQHAB

Cummins/Onan DQHAB Generator Set

The Cummins/Onan DQHAB is a 300 kW (375 kVA) diesel standby generator set powered by a Cummins/Onan QSM11-G4 engine. It is available at 110/190 V, 115/200 V, 115/230 V, 120/208 V, 127/220 V, 139/240 V, 120/240 V, 220/380 V, 230/400 V, 240/416 V, 254/440 V, 277/480 V and 347/600 V, 3-phase and 60 Hz. It holds about 36.7 L (9.7 gal) of oil and 33.7 L (8.9 gal) of coolant, with a maximum ambient rating of 52 °C. Starting uses 2 group-12 batteries rated 550 CCA at 24 V. The set measures 3453×1524×1803 mm (135.9×60.0×71.0 in) and weighs about 2676 kg (5900 lb). The same QSM11-G4 engine also powers generator sets from MQ Power and Terex.

300 kW
Standby
10.8 L
Displacement
36.7 L
Oil capacity
4
Document types

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

Specifications

Fueldiesel
Frequency60.0 Hz
Standby power300 kW
Standby kVA375
Prime power270 kW
EmissionsTier 3
ControllerPCC 2100, PowerCommand, PowerCommand 2100, PowerCommand PCC2100 CAN
Oil capacity36.7 L
Voltage options110/190 V, 115/200 V, 115/230 V, 120/208 V, 127/220 V, 139/240 V, 120/240 V, 220/380 V, 230/400 V, 240/416 V, 254/440 V, 277/480 V, 347/600 V
Phase3
Battery group12
Battery cranking550 CCA
Battery voltage24-volt V
Battery quantity2
Coolant capacity33.7 L
Max ambient52 °C
Dimensions (L×W×H)3453×1524×1803 mm
Dry weight2676 kg

Engine

Cummins/Onan QSM11-G4
Oil capacity36.72 L
Coolant capacity9.5 L
Displacement10.8 L
Aspirationturbocharged and after-cooled
Rated speed1800 rpm

Maintenance & consumables

for the Cummins/Onan QSM11-G4
ItemSpecCapacityPart #Interval
Air filterClean/replace engine air cleaner element; Inspect/clean engine ground—1000 hr find
Fuel filterDrain fuel system primary filter/water separator—500 hr find
Oil filterInspect, adjust or replace alternator or fan belt; Change cooling system coolant (ELC); Replace water separator element; Replace fuel system secondary filter; Inspect/adjust engine valve lash; Inspect aftercooler core; Inspect alternator; Inspect engine mounts; Inspect starting motor; Inspect turbocharger; Inspect water pump—2000 hr find
BeltInspect, adjust or replace alternator or fan belt; Inspect/adjust engine valve lash; Inspect aftercooler core; Inspect alternator; Inspect engine mounts; Inspect starting motor; Inspect turbocharger; Inspect water pump—2000 hr find
CoolantCheck cooling system coolant level; Check driven equipment; Inspect engine air cleaner service indicator; Check engine oil level; Drain tank water and sediment; Check battery electrolyte level; Clean/test aftercooler core; Add cooling system coolant extender (ELC); Change cooling system coolant (ELC)—50 hr
Coolant filter— find
OilChange engine oil and filter—12000 hr

Common questions

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

The Cummins/Onan DQHAB is rated 300 kW standby (375.0 kVA).

What engine does the Cummins/Onan DQHAB use?

The Cummins/Onan DQHAB is powered by the Cummins/Onan QSM11-G4 engine.

What fuel does the Cummins/Onan DQHAB use?

The Cummins/Onan DQHAB runs on diesel.

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

The Cummins/Onan QSM11-G4 engine in the Cummins/Onan DQHAB has an oil capacity of 36.72 liters.

Troubleshooting

56

Fault codes

CodeMeaning
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 startFault Code 101 - Starter Motor FaultCheck starter motor connections and replace if necessary
Engine runs roughFault Code 203 - Fuel System FaultInspect fuel filter and injectors, clean or replace as needed
Generator produces low voltage outputFault Code 304 - Alternator Winding FaultCheck alternator windings for damage and repair or replace if necessary

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

Parts

11
Part #DescriptionQtySystem
A035N852Hose, Drain - Bulk (Order by the Foot - 1 Feet Required)-1Hose PartsGeek
ES100006Overcurrent Relay WiringOvercurrent relay wiring PartsGeek
ES100026Three Position Stack Switch WiringStack switch wiring PartsGeek
ES100027Distribution Panel Wiring for T360 Series Single Phase ControlDistribution panel wiring PartsGeek
ES100030Standard Generator Wiring for T360 SeriesGenerator wiring PartsGeek
ES100039Idle-Run Wiring (Cummins)Idle run wiring PartsGeek
134890T360 Super Quiet GeneratorService part / kit PartsGeek
961-0514InPower Service Tool Kit1Service part / kit PartsGeek
961-0619Generator Set Support4Service part / kit PartsGeek
A045Z906Isolator, Vibration1Service part / kit PartsGeek
A045Z908Bracket, Switch1Service 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
Prime87.63
Prime0%23.776.28
Prime0%40.3510.66
Prime0%58.7115.51
Prime1%78.2120.66
Standby82.56
Standby0%25.256.67
Standby0%43.811.57
Standby0%64.8117.12
Standby1%87.6323.15

Available documents

Spec sheet — Cummins-300-DQHAB (Cummins/Onan)Spec sheet — s-1586 (Cummins/Onan)Installation manual — Cummins-DQHAA-DQHAB-installation-manual (Cummins/Onan)Parts manual — 0961-0217 I10 201810 (Cummins/Onan)Parts manual — A042L927 I5 201810 (Cummins/Onan)Service manual — Cummins-PowerCommand-2100-controller-operator-manual (Cummins/Onan)Service manual — DQHA A-B with QSM11 Engine PCC2100 Service Manual (Cummins/Onan)

Other sets with this engine

Cummins/Onan C300D6Cummins/Onan DQHAA