Specifications
| Fuel | Natural Gas, Propane |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 10 kW |
| Oil capacity | 4.0 L |
| Voltage options | 12 V |
| Phase | Single Phase |
| Rated current | 65 A |
| Battery voltage | 12 V |
| Coolant capacity | 11 L |
Maintenance & consumables
for the Cummins/Onan 4-cyl.| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | To Service the Air Cleaner:1. Loosen clamps and remove air cleaner housing end cap.2. Remove the air filter element from the filter housing.3. To clean, blow low pressure compressed air (30 psi/207 kPa) through the element from the clean side. Hold the nozzle at least 1 inch (25 mm) away to avoid damaging the element.4. Soak the filter for at least 15 minutes in water and Donaldsons D1400 solvent to remove soot, carbon and dirt.5. Rinse with clean water (low pressure) and allow to air dry. Do not blow dry with compressed air. Reinstall when the filter element is dry. Replace the filter after two cleanings to avoid restricting the airflow. | — | 200 hr | ||
| Fuel filter | Spin off oil filter and discard it. Thoroughly clean filter mounting surface. Apply a thin film of oil to filter gasket and install new element. Spin element on by hand until gasket just touches mounting pad and then turn an additional 1/2 to 3/4 turn. Do not over-tighten (Figure 5-2). | — | |||
| Oil filter | Run engine until thoroughly warm before draining oil. Stop the set, place a pan under the drain outlet and remove the oil drain plug or open the drain valve. After the oil is completely drained, replace the drain plug or close the drain valve. Refill with oil of the correct API viscosity grade for the temperature conditions. | — | 200 hr | ||
| Battery | Check the battery connections to make sure they are clean and tight. A light coating of non-conductive grease will retard terminal corrosion. | — | 90 hr | ||
| Belt | An improperly adjusted fan belt can cause engine overheating and insufficient battery charging. Push on the fan belt in the middle and check that it deflects no more than 0.5 in. (13 mm) under a load of 15 lbs. (67 N). If belt is loose, loosen the two bolts on the battery charging alternator and adjust until proper tension is obtained. Retighten alternator bolts after adjustment. | — | 90 hr | ||
| Coolant | Check the coolant level during shutdown periods at the interval specified in Table 5-1. Use a 50/50 coolant solution (50% pure water and 50% antifreeze). Always keep level in the coolant recovery tank between low and full. | 11.0 L | — | 90 hr | |
| Oil | Check the engine oil level during engine shutdown periods at the intervals specified in the Maintenance Table. | — | 200 hr | ||
| Spark plug | Check and replace annually. | — | 365 hr |
Common questions
How many kW is the Cummins/Onan LSG-423?
The Cummins/Onan LSG-423 is rated 10 kW standby.
What engine does the Cummins/Onan LSG-423 use?
The Cummins/Onan LSG-423 is powered by the Cummins/Onan 4-cyl. engine.
What fuel type does the Cummins/Onan LSG-423 take?
The Cummins/Onan LSG-423 runs on Natural Gas, Propane.
What's the oil capacity on a Cummins/Onan LSG-423?
The Cummins/Onan 4-cyl. engine in the Cummins/Onan LSG-423 has an oil capacity of 4.5 liters.
Troubleshooting
6Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| PRE HET/LOP lamp lights. Engine continues to operate. | Indicates engine has begun to overheat and engine temperature has risen to approximately 205°F (97°C) or coolant level is low. | A. Reduce load if possible by turning off non-critical loads. b. Check air inlets and outlets and remove any obstructions to airflow. |
| HI ENG TEMP lamp lights. Engine shuts down. | Indicates engine has overheated (engine temperature has risen above 215°F/102°C) or coolant level is low. | 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 if none of the above. |
| LO OIL PRES lamp lights. Engine shuts down. | Indicates engine oil pressure has dropped to 30 psi (207 kPa). | NOTE: See also step 5. |
| OVERCRANK lamp lights and engine stops cranking. | Indicates possible fuel system problem. | A. Check for empty fuel tank (LPG Vapor), 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. | 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. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing. Full Cummins/Onan LSG-423 troubleshooting guide (11 entries) →
Parts
4| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 928-0129 | Oil Filter | 2 | Oil filter | Amazon eBay |
| LS1169s | FILTER | 1 | Oil filter | Amazon eBay |
| 928-0605 | 1 | Service part / kit | Amazon eBay | |
| 928-0608 | Manual, Onan Installation | 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
Service manual — 928-0127 Onan 10 GEAA 20 GEAB Operator's Manual (4-1994) (Cummins/Onan)