Specifications
| Fuel | Diesel |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 32 kW |
| Controller | Detector 7 |
| Oil capacity | 11.5 L |
| Voltage options | 24 V |
| Phase | 3 Phase |
| Power factor | 0.8 |
| Coolant capacity | 21 L |
Maintenance & consumables
for the Cummins/Onan 4B3.9| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | — | 8760 hr | find | ||
| Fuel filter | — | 50 hr | find | ||
| Oil filter | — | 500 hr | find | ||
| Belt | — | find | |||
| Coolant | — | ||||
| Coolant filter | — | find | |||
| Oil | 6.0 Qts | — | 500 hr |
Common questions
What is the power rating of the Cummins/Onan 37 DGBA?
The Cummins/Onan 37 DGBA is rated 32 kW standby.
What engine does the Cummins/Onan 37 DGBA use?
The Cummins/Onan 37 DGBA is powered by the Cummins/Onan 4B3.9 engine.
What fuel does the Cummins/Onan 37 DGBA use?
The Cummins/Onan 37 DGBA runs on Diesel.
What is the oil capacity of the Cummins/Onan 37 DGBA?
The Cummins/Onan 4B3.9 engine in the Cummins/Onan 37 DGBA has an oil capacity of 11.0 liters.
Troubleshooting
13Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| PRE HI ENGINE TEMP lamp lights. Engine continues to operate. | Indicates engine has begun to overheat and engine temperature has risen to approximately 215F (102C). | A. Reduce load if possible by turning off non-critical loads. b. Check air inlets and outlets and remove any obstructions to airflow. If engine can be stopped, follow procedure in step 3. |
| HI ENG TEMP lamp lights. Engine shuts down. | Allow engine to cool down completely before proceeding with the following checks: a. Check coolant level and replenish if low. Look for possible coolant leakage points and repair if necessary. b. Check for obstructions to cooling airflow and correct as necessary. c. Check for a slipping fan belt and tighten if loose. d. Reset control and restart after locating and correcting problem. Contact an authorized service center for service if none of the above. | |
| PRE LO OIL PRES lamp lights. Engine continues to operate. | Indicates engine has overheated (engine temperature has risen above 222F/106C) or coolant level is low (sets with coolant level sensor). | A. Check coolant level and replenish if low. Look for possible coolant leakage points and repair if necessary. b. Check for obstructions to cooling airflow and correct as necessary. c. Check for a slipping fan belt and tighten if loose. d. Reset control and restart after locating and correcting problem. Contact an authorized service center for service if none of the above. |
| LO OIL PRES lamp lights. Engine shuts down. | Indicates engine oil pressure has dropped to 20 psi (138 kPa). | If generator is powering critical loads and cannot be shut down, wait until next shutdown period and then follow step 5 procedure. If engine can be stopped, follow procedures in step 5. |
| LO OIL PRES lamp lights. | Indicates engine oil pressure has dropped to 14 psi (97 kPa). | Check oil level, lines and filters. If oil system is OK but oil level is low, replenish. Reset control and restart. Contact an authorized service center if oil pressure is not in the range of 25 to 40 psi (172 to 275 kPa). |
| OVERCRANK lamp lights and engine stops cranking. | Indicates possible fuel system problem. | A. Check for empty fuel tank, fuel leaks, or plugged fuel lines and correct as required. b. Check for dirty fuel filter and replace if necessary (see Maintenance section). c. Check for dirty or plugged air filter and replace if necessary (see Maintenance section). d. Reset the control and restart after correcting the problem. Contact an authorized service center for service if none of the above. |
| Engine runs and then shuts down, OVERSPEED lamp lights. | Indicates engine has exceeded normal operating speed. | Contact an authorized service center for service. |
| SWITCH OFF lamp flashes. | Indicates Run/Stop/Remote switch is in the Stop position which will prevent automatic starting if an automatic transfer switch is used. Move the Run/Stop/Remote switch to the Remote position for automatic starting. | |
| LO FUEL lamp lights. Engine continues to run. | Indicates diesel fuel supply is running low. | Check fuel supply and replenish as required. |
| LO FUEL LAMP lights. Engine shuts down and LO OIL PRES lamp lights. | Indicates engine has run out of fuel. Check fuel level and replenish as required. | |
| LO ENG TEMP lamp lights. Set is in standby mode but is not operating. | Lamp lights when engine coolant temperature is 70 F (21 C) or lower. Since the lamp goes out after the engine warms up, there should be no cause for alarm even during initial generator set operation. | |
| The FAULT 1 or FAULT 2 fault lamp lights. Engine shuts down immediately, engine runs for several seconds and then shuts down, or engine continues to run. | The standard undesignated fault functions are programmed to shut down the set when a fault is sensed. Fault 1 is time delayed while Fault 2 is immediate. The nature of the fault is an optional selection that is determined when the set installation is designed. The undesignated fault functions may also be programmed for non-shutdown or non-time delay. | |
| The external alarm and fault lamp may be deactivated by moving the Run/Stop/Remote switch to the Stop position and pressing the Reset/Lamp Test/Preheat switch. | Locate the problem and correct it before restarting the set. While pressing the Reset/Lamp Test/Preheat switch, make certain that all lamps light. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Parts
6| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 928-0502B | Service part / kit | PartsGeek | ||
| 928-0506 | Service part / kit | PartsGeek | ||
| 960-0135 | Service part / kit | PartsGeek | ||
| 960-0504A | Service part / kit | PartsGeek | ||
| 960-0505 | Service part / kit | PartsGeek | ||
| 960-12 | Service 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
| Rating | Load | L/h | gal/h |
|---|---|---|---|
| Prime | |||
| Standby |
Available documents
Service manual — 960-0143 Cummins DGBA DGCA DGDA Operator's Manual (8-2015) (Cummins/Onan)