Service parts for the ES-1922
Grouped by system, with how many of each the parts manual calls for.
Air intake
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
| Frequency | 60.0 Hz |
|---|---|
| Voltage options | 120 V, 240 V, 120/240 V |
| Phase | three-phase |
Maintenance & consumables
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Generator Air Outlet | G-1231 | Amazon eBay | ||
| Fuel filter | 19-26 | — | |||
| Oil filter | 28-38 | — | |||
| Battery | — | ||||
| Belt | — | ||||
| Coolant | — | ||||
| Oil | 45-60 | — | |||
| Spark plug | — |
Common questions
What voltages is the Cummins/Onan ES-1922 available in?
The Cummins/Onan ES-1922 is offered in 120 V, 240 V, 120/240 V, three-phase-phase.
What air filter fits the Cummins/Onan ES-1922?
The Cummins/Onan ES-1922 uses air filter part number G-1231.
Troubleshooting
18Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| Generator will not produce AC voltage — Generator rotor is stopped or not rotating fast enough. Generator should be driven at 1800 RPM to produce rated voltage | Generator rotor is stopped or not rotating fast enough | Troubleshoot entire hydraulic system; Check the inlet and outlet connections at the hydraulic motor, and make sure they are not swapped; Check the setting of the flow control needle valve; Check the generator set "on" valve for malfunctions |
| Generator will not produce AC voltage — No output in load or line | No output in load or line | If a circuit breaker or a fuse is used for generator protection, check for condition which caused breaker to trip or fuse to burn |
| Generator is overheating | Air intake or exhaust outlet is plugged | Remove obstruction |
| Generator is overheating | Generator is electrically overloaded | Remove part of electrical load |
| High or low voltage output — Low voltage at no load: Generator is rotating slower than RPM. Generator should be driven at 1800 RPM to produce rated voltage | Generator is rotating slower than RPM | Verify that the entire hydraulic system functions adequately; Check the setting of the flow control needle valve with a frequency meter, then adjust the voltage adjusting rheostat |
| High or low voltage output — Low voltage with load: Generator is rotating at full 1800 RPM, but is putting out low voltage | Generator is rotating at full 1800 RPM, but is putting out low voltage | Check rectifier assembly |
| High or low voltage output — High voltage: Generator is running at rated RPM or below, but is putting out higher than rated voltage | Generator is running at rated RPM or below, but is putting out higher than rated voltage | Use a frequency meter to adjust the no-load frequency to 62-63 hz, then adjust the voltage to 117-118 volts; If voltage remains high, or does not adjust, then replace the voltage regulator |
| Low or no hydraulic fluid flow | No hydraulic fluid in reservoir or hydraulic lines | Refer to Operation section for proper filling and bleeding procedures |
| Low or no hydraulic fluid flow | Shutoff valve is not allowing oil flow | Replace shutoff valve |
| Low or no hydraulic fluid flow | Generator set is damaged, preventing free rotation of rotor shaft and causing hydraulic pressure to build up | Excessive torque is required to rotate the rotor shaft. Remove the pressure hydraulic lines at the motor and the fan guard at the opposite end of the generator to check for this condition. It should be possible to rotate the shaft by hand, although a degree of resistance will be present |
| Low or no hydraulic fluid flow | Pump control failure and/or load sense line problem | Examine and replace/repair parts as needed |
| Hydraulic system overheating | Check fluid supply in system. Hydraulic system is normally self-cooling, and depends upon fluid flow between system pump and motor | Maintain adequate fluid flow in hydraulic system |
| Hydraulic system overheating | Check availability of water/air cooling flow to (optional) heat exchanger | Maintain adequate cooling water/air flow to (optional) heat exchanger. Make certain that heat exchanger and hydraulic lines are isolated from other sources of heat |
| Hydraulic system overheating | Generator overloaded | Remove part of the electrical load |
| Hydraulic system overheating | Motor/generator damaged, preventing free rotation of rotor shaft | Excessive torque required to rotate the motor/generator shaft. Remove the pressure hydraulic lines at the motor and the fan guard at the opposite end of the generator to check for this condition. It should be possible to rotate the shaft by hand, although a degree of resistance will be present |
| Hydraulic system overheating | Excess heat generated by other devices in the system | Disable any other device and run the generator alone |
| External hydraulic system leakage | Check for leakage at the hydraulic fittings and at the inlet and outlet of the hydraulic motor | Attempt to stop the leak by tightening the fitting (do not overtighten). If this does not stop the leak, replace fittings as necessary. Check the O-rings for damage |
| External hydraulic system leakage | Cracked hydraulic lines | Replace lines as necessary |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Parts
4| Part # | Description | Qty | System | |
|---|---|---|---|---|
| ES-1822-1 | Single-phase control box | 1 | Control box | Amazon eBay |
| ES-1922-1 | THREE-PHASE CONTROL BOX | 1 | Control box | Amazon eBay |
| G-1231 | Generator Air Outlet | Air filter | Amazon eBay | |
| 943-0100 | Generator Set | 8 | 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 — 943-0100 Onan HydraStar Genset Operators Manual (8-1989) (Onan)
This page was generated from the 1 manufacturer document above by automated extraction; every figure shown is copied from one of them. How the data is compiled.