Specifications
Ratings spec sheet not in our library yet — see the documents below.
Maintenance & consumables
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | — | 1000 hr | find | ||
| Fuel filter | — | 500 hr | find | ||
| Oil filter | — | 500 hr | find | ||
| Belt | — | 8 hr | find | ||
| Coolant | — | 2 hr | |||
| Oil | — | 500 hr |
Troubleshooting
31Fault codes
| Code | Meaning |
|---|---|
| 2 | Low Oil Pressure Fault |
| 3 | Service Check Fault |
| 4 | Overcrank |
| 12 | Overvoltage |
| 13 | Undervoltage |
| 14 | Overfrequency |
| 15 | Underfrequency |
| 17 | Fuel Pump Fault |
| 19 | Governor Actuator (EFI Only) |
| 22 | Governor Actuator Overload (EFI Only) |
| 23 | Oil Pressure Switch Fault |
| 27 | Voltage Sense Lost |
| 29 | High Battery Voltage |
| 31 | Overspeed Fault |
| 32 | Low Cranking Speed Sense |
| 33 | Fault Code 3 - Fault Code 33 |
| 35 | Control Card Failure |
| 36 | Generator Set Stopped Without Fault Condition - Fault Code 36 |
| 37 | Invalid Set Configuration |
| 38 | Field Overload (Overvoltage) |
| 41 | Alternator Rotor Fault |
| 42 | Processor Fault - Fault Code 42 |
| 43 | Processor Fault - Fault Code 43 |
| 45 | Speed Sense Fault |
| 47 | Ignition Fault |
| 48 | Field Sense Fault |
| 51 | Processor Failure - Fault Code 51 |
| 52 | Fuel Injector Fault (EFI Only) |
| 54 | MAT Sensor Fault (EFI Only) |
| 56 | MAP Sensor Fault (EFI Only) |
| 57 | Overprime Fault |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Repair guides
4Step-by-step procedures compiled from the Cummins/Onan service manual for this model.
Parts
9| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 0541-1287 | Harness Kit for InPower Diagnostic Service Tool | 1 | Hose | PartsGeek |
| 0541-1374 | InPower Harness Kit (Spec J and later) | 1 | Hose | PartsGeek |
| 0541-1389 | Harness Kit for InPower Diagnostic Service Tool | 1 | Hose | PartsGeek |
| 121-0122-02 | Hydraulic Pump | Pump | PartsGeek | |
| 17208238 | 3.1L, 196.5g working capacity | 1 | Carbon canister | PartsGeek |
| 17208252 | 3.3L, 233.8g working capacity | Carbon canister | PartsGeek | |
| 0420-0603 | Bypass Control Board Tester | 1 | Service part / kit | PartsGeek |
| 0541-1143 | Bypass Control Board Tester Adapter Kit | 1 | Service part / kit | PartsGeek |
| 500-3450 | OUTLINE DRAWING—HGJAF | 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 |
|---|---|---|---|
| Full load | 5.3 | 2.4 | |
| Half load | 3.9 | 1.8 | |
| No load | 2.2 | 1.0 | |
| Prime | |||
| Standby |
Available documents
Installation manual — 983-0601 Onan HGJAD (spec A-E) HGJAE (spec A-E) HGJAF (spec A-D) Mobile Genset Installation Manual (11-2014) (Cummins/Onan)Reference — 900-0617D Onan HGJAx Repair Times (Cummins/Onan)Parts manual — HGJAD, HGJAE, HGJAF Parts Manual (Cummins/Onan)Service manual — 983-0501 Onan HGJAA to HGJAF (spec A-D) RV Genset Service manual (02-2010) (Cummins/Onan)Service manual — 983-0501D Onan HGJAA HGJAB HGJAC HGJAD HGJAE HGJAF Mobile Genset Service manual (01-2006) (Cummins/Onan)Service manual — 983-0601B Onan HGJAD HGJAE HGJAF Mobile Genset Installation Manual (07-2005) (Cummins/Onan)Service manual — HGJAA, HGJAB, HGJAC, HGJAD, HGJAE, HGJAF Service Manual (Cummins/Onan)