Service parts for the DGAB
Grouped by system, with how many of each the parts manual calls for.
Oil system
1 requiredElectrical
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
| Fuel | 2-D Diesel |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 20 kW |
| Oil capacity | 6.0 L |
| Voltage options | 12 V |
| Phase | I,3 |
| Power factor | 0.8 |
| Battery group | 31 |
| Battery cranking | 530 CCA |
| Battery voltage | 12 V |
| Battery quantity | 1 |
| Coolant capacity | 11.5 L |
Maintenance & consumables
for the Cummins/Onan 4A2.3| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | — | 500 hr | |||
| Fuel filter | — | 1000 hr | |||
| Oil filter | Change Fuel Filter | 51592 | 200 hr | Amazon eBay FridayParts $15.89 | |
| Battery | BCI Group 31 | ES-1178-2 | Amazon eBay | ||
| Belt | — | 200 hr | |||
| Coolant | — | 1000 hr | |||
| Coolant filter | — | ||||
| Oil | — | 250 hr | |||
| Spark plug | — | 1000 hr |
Common questions
What size generator is the Cummins/Onan DGAB?
The Cummins/Onan DGAB is rated 20 kW standby.
What engine is in the Cummins/Onan DGAB?
The Cummins/Onan DGAB is powered by the Cummins/Onan 4A2.3 engine.
What fuel does the Cummins/Onan DGAB use?
The Cummins/Onan DGAB runs on 2-D Diesel.
What is the oil capacity of the Cummins/Onan DGAB?
The Cummins/Onan 4A2.3 engine in the Cummins/Onan DGAB has an oil capacity of 8.5 liters.
Which oil filter part number does the Cummins/Onan DGAB take?
The Cummins/Onan DGAB uses oil filter part number 51592.
Troubleshooting
6Symptoms & remedies
| Symptom | Remedy |
|---|---|
| PRE HI ENGINE TEMP lamp lights. Engine continues to operate. | 1. Green RUN lamp lights following engine start-up. 2. Indicates engine has begun to overheat and engine temperature has risen to approximately 202°F (94°C). If generator is powering non-critical and critical loads and cannot be shutdown, use the following: a. Reduce load if possible by turning off non-critical loads. b. Check air inlets and outlets and remove any obstructions to airflow. c. Open doors or windows in generator area to increase ventilation. If engine can be stopped, follow procedure in step 3. |
| HI ENG TEMP lamp lights. Engine shuts down. | 4. Indicates engine has overheated (engine temperature has risen above 222°F/106°C) or coolant level is low (sets with coolant level sensor). 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 dealer or distributor if none of the above. |
| PRE LO OIL PRES lamp lights. Engine continues to operate. | 4. 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. Engine shuts down. | 5. Indicates engine oil pressure has dropped to 14 psi (97 kPa). Check oil level, lines and filters. If oil system is okay but oil level is low, replenish. Reset control and restart. Contact an authorized dealer or distributor if oil pressure is not in the range of 30 to 55 psi (206 to 379 kPa). |
| OVERCRANK lamp lights and engine stops cranking. | 6. *12-Light Panel Only. Engine runs, shuts down, and LO OIL PRES lamp lights. |
| Engine runs and then shuts down, OVERSPEED lamp lights. | 7. *12-Light Panel Only. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing. Full Cummins/Onan DGAB troubleshooting guide (23 entries) →
Parts
22| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 122-0550 | Filter, Oil | 1 | Oil filter | Amazon eBay $21.84 |
| 122-0712 | Oil Filter (ESN 5312 5968 and Up) | Oil filter | Amazon eBay KuduParts $11.00 | |
| 132-0276 | Sea Water Pump Impeller kit w/cover & gasket | Impeller | Amazon eBay | |
| 132-0317 | Sea Water Pump Impeller | Impeller | Amazon eBay | |
| 149-1758 | Fuel Filter Element | Fuel filter | Amazon eBay | |
| 193-0244 | Sender, Pressure - 0i1 | 1 | Sensor | Amazon eBay |
| 333-0220 | Glow Plug (12 Volt) | Glow plug | Amazon eBay | |
| 511-0147-14 | Water Pump Belt | Belt | Amazon eBay | |
| ES-1179-2 | FAN BELT | 1 | Belt | Amazon eBay |
| FS1245 | Fuel Filter | Fuel filter | Amazon eBay | |
| FS1343 | Standard Air Cleaner | Air filter | Amazon eBay | |
| LS-1028-2 | DIPSTICK, OIL FILTER, AND FILL CAP (Figure 4-6) | 1 | Oil filter | Amazon eBay |
| 309-0169 | 1 Begin Spec G 25 26 | 1 | Service part / kit | Amazon eBay |
| 718-1067 | Screw. Hex Head | 1 | Service part / kit | Amazon eBay |
| 934-0500 | 1 | Service part / kit | Amazon eBay $49.00 | |
| 960-0135 | Service part / kit | Amazon eBay $19.00 | ||
| C-1089 | CRANKCASE BREATHER (Figure 4-7) | 1 | Service part / kit | Amazon eBay |
| ES-1178-2 | BATTERY CONNECTIONS (Figure 4-4) | 1 | Service part / kit | Amazon eBay |
| ES-1789-1 | 10-Light Control | Service part / kit | Amazon eBay | |
| M-1753 | EXHAUST AND FUEL SYSTEM CHECKS (Figure 4-1) | 1 | Service part / kit | Amazon eBay |
| TB21 | TERMINAL BLOCK | 1 | Service part / kit | Amazon Amazon Amazon eBay eBay FridayParts $57.30 |
| sa377 | Resonator | 1 | 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 — 0932-0112 Onan Post-Sale Literature Index (07-1998) (Cummins/Onan)Parts manual — 934-0236 Onan DGAB DGAC DGAD (Spec F) DGAE (Spec C) DL4 DL6 (Spec C-F) DLT (Spec A-C) A41 A61 (Spec E) A61T (Spec B) (08-2011) (Cummins/Onan)Service manual — 934-0125 Onan DGAB DGAC DGAD DGAE Diesel Genset Operators manual (08-1990) (Cummins/Onan)