The In-line 4 cyl. is a 4-cylinder engine rated at 1800 rpm. It powers generator sets from Generac, including the Guardian Series 25 kW, Guardian Series 30 kW, Guardian Series 45 kW and Guardian Series 60 kW.
Also known as: In-line 4 cyl.
| Cylinders | 4 |
|---|---|
| Rated speed | 1800 rpm |
Compiled from service & troubleshooting documentation across every generator set that uses the In-line 4 cyl..
| Item | Action | Hours | Months | Notes |
|---|---|---|---|---|
| Replace fuel filter | Replace | 500 hr | ||
| Replace oil and filter | Change | 500 hr | ||
| Drain/flush coolant system | Drain | 1000 hr | ||
| Check coolant level and hoses | Check | First service | ||
| Check fuel level | Check | First service | ||
| Check oil level | Check | First service |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Other | Total Harmonic Distortion | <5% | ||
| Speed | Steady State Regulation (Governor) | ±0.25% | ||
| Torque | Operating temperature rise | 120 | °C above 40°C ambient | rated output |
| Voltage | Voltage Regulation | ±1% |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
| Fluid | Grade | Standard | Ambient | Capacity | Notes |
|---|---|---|---|---|---|
| Coolant | Peak Fleet-Charge 50/50 ethylene glycol | -20°C to 48°C | 2.8 gal | Use demineralized or distilled water base | |
| Engine oil | SAE rated high detergent oil | API Service Class SF | for gasoline engines, similar to your car; refer to owner's manual for details | ||
| Engine oil | 15W-40 | API Service Class CD or better | -20°C to 48°C | Synthetic oil can be used in appropriate weight | |
| Fuel | Ultra Low Sulfur Diesel | below 40°C | Mechanical engine-driven pump, 5 micron filter (15/20/30 kW), 10 micron filter (48/50 kW) |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
| Code | Name | Meaning | Severity | Action |
|---|---|---|---|---|
| HIGH TEMPERATURE | High Temperature | Engine coolant temperature exceeds limit | Shutdown | |
| LOW OIL PRESSURE | Low Oil Pressure | Oil pressure below acceptable level | Warning | |
| NOT ACTIVATED | Not Activated | Unit will not start in AUTO with utility loss | Info | |
| OVERCRANK | Overcrank | Engine overcrank fault | Warning | |
| OVERLOAD | Overload | Unit overloaded, shuts down during operation | Shutdown | |
| RPM SENSE LOSS | RPM Sense Loss | Loss of engine RPM signal | Shutdown |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
| Voltage | Phase | Connection | Leads | Notes |
|---|---|---|---|---|
| 120/208 | 3 | Three phase | RD015, RD020, RD030, RD050 | |
| 120/240 | 1 | Single phase | RD015, RD020, RD030, RD048 | |
| 120/240 | 3 | Three phase | RD015, RD020, RD030, RD048, RD050 | |
| 277/480 | 3 | Three phase | RD030, RD048, RD050 |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
The In-line 4 cyl. powers 9 generator set(s), including Generac Guardian Series 25 kW, Generac Guardian Series 30 kW, Generac Guardian Series 45 kW, Generac Guardian Series 60 kW, Generac RD015.
A commonly reported issue on generators using the In-line 4 cyl. is: Warning active. SERVICE SCHEDULE C. Fix: Perform SERVICE SCHEDULE C maintenance; press ENTER to clear..