Specifications
| Fuel | diesel |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 174 kW |
| Standby kVA | 217 |
| Prime power | 164 kW |
| Emissions | Interim Tier IV |
| Controller | Power Zone |
| Oil capacity | 31.2 L |
| Voltage options | 480/277 V, 208/120 V, 240/120 V |
| Phase | 3 |
| Circuit breaker | 800 A |
| Battery cranking | 1000 CCA |
| Max ambient | 48.89 °C |
| Dimensions (L×W×H) | 3660×1270×1960 mm |
| Dry weight | 3005 kg |
| Sound level | 68.0 dBA @ 7.01 m |
| Fuel tank | 1294.6 L |
| Tank runtime | 24.5 hr |
Engine
| Oil capacity | 31.2 L |
|---|---|
| Coolant capacity | 29.8 L |
| Displacement | 6.8 L |
| Aspiration | turbocharged |
| Rated speed | 1800 rpm |
Maintenance & consumables
for the John Deere PE6068HFG95| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | — | 1000 hr | |||
| Fuel filter | — | 1000 hr | |||
| Oil filter | — | 3000 hr | |||
| Battery | Service Battery | — | 3000 hr | ||
| Belt | Check Automatic Belt Tensioner and Belt Wear | — | 1000 hr | ||
| Coolant | Maintenance | — | 250 hr | ||
| Coolant filter | Check Coolant Level, Check Cooling System | — | 500 hr | ||
| Oil | — | 1000 hr | |||
| Spark plug | Replace OVR filter, Replace oil filter, Replace air filter, Replace primary fuel filter | — | 3000 hr |
Service intervals
17| Item | Action | Hours | Months | Notes |
|---|---|---|---|---|
| Engine mounts | Check | 250 hr | ||
| Oil vapor recirculation system/non-return valve | Check | 250 hr | ||
| Air intake hoses, connections, and system | Check | 500 hr | ||
| Automatic belt tensioner and belt wear | Check | 500 hr | 12 mo | Belt removed and checked for wear at 500 hour/12 month service interval |
| Battery | Check | 500 hr | Service battery | |
| Cooling system | Check | 500 hr | ||
| Engine electrical ground connection | Check | 500 hr | ||
| Engine oil and oil filter | Change | 500 hr | First service — Also 100 hrs break-in period; interval reduced to every 250 hours if not using John Deere Plus 50 II engine oil | |
| Fuel filter elements | Replace | 500 hr | 12 mo | |
| Leveling jack(s) | Lubricate | 500 hr | ||
| Oil vapor recirculation filter | Replace | 500 hr | ||
| Generator drive plate torque | Check | 1000 hr | See Checking Generator Drive Plate Torque | |
| Air cleaner elements | Replace | 3000 hr | 36 mo | |
| Alternator and fan belts | Replace | 3000 hr | 36 mo | |
| Diesel Particulate Filter (DPF) ash removal | Replace | 3000 hr | Expected service interval at least 3,000 or 4,500 hours; by OEM authorized dealer only | |
| Fuses | Check | 3000 hr | 36 mo | |
| Thermostats | Test | 3000 hr | 36 mo |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Service specifications
15| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Pressure | Engine oil pressure (minimum on start) | 5 | psi (34 kPa) | within five seconds |
| Pressure | Engine oil pressure (normal operating) | 35-80 | psi (241-552 kPa) | |
| Speed | Engine governed operating speed | 1800 | rpm | |
| Speed | Output frequency (no load) | 60 | Hz | no loads connected |
| Temperature | Coolant temperature (normal operating) | 180-200 | °F (82-93°C) | average ambient 70°F (21°C) |
| Temperature | Coolant temperature gauge range | 150-250 | °F (66-121°C) | |
| Temperature | High coolant temperature shutdown | 210 | °F (99°C) | |
| Torque | Generator drive plate bolt | 36 (49) | ft-lbs (Nm) | |
| Torque | Generator drive plate bolt | 46 (63) | ft-lbs (Nm) | |
| Torque | Generator drive plate bolt | 47 (64) | ft-lbs (Nm) | |
| Torque | Wheel lug nuts - first pass | 20-25 | ft-lbs (Nm) | |
| Torque | Wheel lug nuts - second pass | 50-60 | ft-lbs (Nm) | |
| Torque | Wheel lug nuts - third pass | 90-120 | ft-lbs (Nm) | |
| Voltage | Battery voltage (normal, engine running) | 12-14 | V | 12 volt systems |
| Voltage | Battery voltage (normal, engine running) | 24-26 | V | 24 volt systems |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Recommended fluids
| Fluid | Grade | Standard | Ambient | Capacity | Notes |
|---|---|---|---|---|---|
| Coolant | Propylene glycol base antifreeze | Do not use chromate base rust inhibitor with propylene glycol base antifreeze, boosters or additives | above -24°C | Mixtures (antifreeze/water by volume -> freezing point): 40/60 = -12°F (-24°C); 50/50 = -34°F (-36°C); 60/40 = -54°F (-48°C); 70/30 = -90°F (-67°C) (maximum freeze protection is at 70%) | |
| Engine oil | John Deere Plus 50 II | High quality detergent oil, appropriate classification and viscosity for engine type/ambient temperature | Factory filled with engine oil of a grade recommended by the engine supplier; consult IASD or engine service manual |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Procedures
12Fine Voltage Adjustment adjustment
- With the unit running, press the Generator button.
- Press Enter; the voltages displayed begin flashing.
- Use ▲ and ▼ to adjust the voltage.
- Press Enter to confirm the new voltage; voltages stop flashing.
To Achieve 240V in 208V Configuration adjustment
⚠ Equipment Damage. Verify voltage application before making changes to factory settings.
- Shut down unit, move Control Power switch to ON (I).
- Press a directional arrow to enter the maintenance screens.
- Press ► until the Status tab shows the Power Zone™ application version (must be V4 or higher).
- Press any directional arrow to enter maintenance screens.
- Press Enter and O simultaneously to display the Configuration menu.
- Navigate to Config Selection, then Config to Edit, then Selected Configuration.
- Select Alternative Configuration 1.
- Enter Password Entry and enter password 4444 if applicable.
- Highlight Generator, then Generator voltage, then Over Voltage Alarms.
- Set Alarm Trip to 153V.
- Set Pre-alarm Trip to 151V.
- Press and hold Enter for five seconds until the Saving screen appears.
Checking Generator Drive Plate Torque maintenance
- Disconnect battery.
- Remove generator fan guard.
- Torque each of the drive plate bolts to the specification shown in the table.
- Install generator fan guard.
- Connect battery.
Force a Manual Exhaust Filter Cleaning maintenance
⚠ Check for adequate fuel level before beginning exhaust filter cleaning.
- Open the control door and locate the switch labeled EXHAUST FILTER CLEANING.
- Move and hold the switch in ON/FORCED (I) for five seconds.
- On the DPF Status screen verify the Regeneration indicator shows DPF Lamp - Solid.
Resetting the Maintenance Alarms maintenance
- With unit shut down, move Control Power switch to CONTROL ON (I).
- Press any directional arrow to enter the maintenance screens.
- Press Enter and O simultaneously to display the Configuration menu.
- Press ▼ to move to the Maintenance group.
- Press ► to access sections; highlight the Maintenance section.
- Press ► to access parameters and highlight the alarm to reset.
- Press Enter to select editable parameters; highlight Reset.
- Press Enter to reset the selected maintenance alarm.
- To save changes, press and hold Enter for five seconds.
Trailer Wheel Bearing Lubrication maintenance
⚠ Use only a high quality grease made specifically for lubrication of wheel bearings.
Tools: Grease gun
- Remove the small rubber plug on the grease cap.
- Attach a standard grease gun fitting to the grease fitting.
- Pump grease into the fitting until new grease is visible around the nozzle.
- Wipe any excess grease from the hub with a clean cloth.
- Replace the rubber plug when finished.
AUTO (Remote) Starting the Unit operation
⚠ Verify contacts on any remote switch are open before entering AUTO mode.
Tools: Jumper wire (minimum 16 gauge)
- Perform a manual start at least once to verify correct operation.
- To check remote start circuit, remove wires from remote start terminal block.
- Press AUTO/MANUAL Mode button so LCD shows Auto Mode.
- Attach a minimum 16 gauge jumper wire across the two remote start terminals.
- Engine should crank, start and run; remove jumper to stop.
- Reconnect remote start switch (transfer switch) wires.
- Verify unit is in AUTO mode.
- Close the main circuit breaker (ON/I) and lock all access doors.
Disabling Automatic (AUTO) Exhaust Filter Cleaning operation
⚠ Risk of Burn. Stay clear of the exhaust system during operation and exhaust filter cleaning.
- Open the control door and locate the switch labeled EXHAUST FILTER CLEANING.
- Move the switch to DISABLED (O).
- On the DPF Status screen verify the Disabled Regeneration indicator shows DPF Inhib - Solid.
Enable Exhaust Filter Cleaning operation
- Open the control door and locate the switch labeled EXHAUST FILTER CLEANING.
- Move the switch to ON/AUTO (I/O).
- On the DPF Status screen verify the Regeneration indicator shows DPF Lamp - Solid.
Lifting the Unit operation
⚠ Always remain aware of people and objects around when moving or lifting the unit.
- Attach a sling or hook directly to the central lift point only if devices are in good condition.
- Verify the equipment used to raise the unit has sufficient capacity.
- Keep doors and hood closed and locked while moving or lifting.
Manually Starting the Unit operation
⚠ Asphyxiation. Running engines produce carbon monoxide.
- Move the Control Power switch to ON (I).
- Press the AUTO/MANUAL Mode button to enter MANUAL mode.
- Press the green Engine Start (I) button to initiate startup.
- If engine does not start, it pauses 15 seconds; up to three crank cycles.
- If Fail to Start alarm, wait two minutes then press Enter to clear.
- Verify AC output voltage is correct (see Fine Voltage Adjustment).
- Check frequency (Hz) reads approximately 60 Hz with no load.
- Switch main circuit breaker ON (I) and add loads via receptacle breakers.
Set the Controller Clock operation
- Navigate to the Maintenance group and press ► to access it.
- Press ► to select the Time section.
- Set the time and date to the correct local time.
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Voltage reconnection
| Voltage | Phase | Connection | Leads | Notes |
|---|---|---|---|---|
| 120V | 3 | Low Delta | T1-T12 (dedicated 12 lead generator) | Dedicated 12 lead generators option |
| 208/120V | 3 | Low Wye | T1-T12 (dedicated 12 lead generator) | Dedicated 12 lead generators option |
| 240/120V | 1 | Low Zig Zag | T1-T12 (dedicated 12 lead generator) | Dedicated 12 lead generators option |
| 240/120V | 3 | High Delta | T1-T12 (dedicated 12 lead generator) | Dedicated 12 lead generators option |
| 480/240V | 1 | High Zig Zag | T1-T12 (dedicated 12 lead generator) | Dedicated 12 lead generators option |
| 480/277V | 3 | High Wye | T1-T12 (dedicated 12 lead generator) | Dedicated 12 lead generators option |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Common questions
What is the power rating of the Generac MMG205?
The Generac MMG205 is rated 174 kW standby (217.0 kVA).
Which engine powers the Generac MMG205?
The Generac MMG205 is powered by the John Deere PE6068HFG95 engine.
What kind of fuel does the Generac MMG205 run on?
The Generac MMG205 runs on diesel.
How much oil does the Generac MMG205 take?
The John Deere PE6068HFG95 engine in the Generac MMG205 has an oil capacity of 31.2 liters.
Troubleshooting
6Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| Low Fuel Level Shut-down | Low fuel level, Unit not level, Fuel tank leaking, Damaged fuel sender or wiring | Check fuel level in LCD window of controller. Verify unit is sitting level to ensure an accurate reading. Check tank for leaks. Check for continuity between sender and engine controller (see DC Wiring). |
| Low Oil Pressure Shutdown | Low oil level, Oil leaking from engine, Oil pressure sender | Check oil level on dipstick. Add oil, if needed. Visually inspect the engine for leaks. Restart unit and verify loss of pressure. Shut down immediately if pressure does not reach 5 psi (34 kPa) within five seconds. See the OEM engine operator’s manual to identify corrective action. |
| Low Coolant Level Shutdown | Low coolant level, Coolant hoses leaking, Engine block or water pump leaking | Allow engine to cool, then check coolant level in radiator. Add coolant if needed. Inspect hoses for leaks. Repair or replace as necessary. Visually inspect for leaks. Verify no coolant has mixed with the engine oil (oil will appear milky). See the OEM engine operator’s manual for additional information. |
| High Coolant Temperature Shutdown | Low coolant level, Blockage in radiator, Leakage in coolant hoses, engine block, or water pump | Add coolant if needed. Allow engine to cool, then check coolant level in radiator. Restart engine and check coolant temperature (on controller). Stop engine immediately if coolant temperature is 210°F (99°C) or more. Check radiator shroud and ducting for blockage and remove any foreign matter. Inspect for visible leaks. Check tension of water pump serpentine drive belt. Remove load on generator and restart engine. Check coolant temperature and shut engine down immediately if it starts to overheat. See the OEM engine operator’s manual for additional information on engine overheating. |
| Overcrank Shutdown | Fuel level low, Check fuel level in tank, Check fuel pump operation, Check air filter for blockage | See the OEM engine operator’s manual for additional information. |
| Overspeed or Under-speed Shutdown | Frequency setting incorrect | Disconnect all loads and restart unit. Read frequency (Hz) in the LCD window on controller. Frequency should read 60 Hz. If frequency is above 60 Hz, engine speed will need to be adjusted. Contact Generac Mobile Products to adjust. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Parts
1| Part # | Description | Qty | System | |
|---|---|---|---|---|
| P-205-003 | Fuel Filter | 1 | Fuel filter | 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.
Fuel consumption
| Rating | Load | L/h | gal/h |
|---|---|---|---|
| Prime | 50% | 24.2 | 6.4 |
| Prime | 75% | 36.3 | 9.6 |
| Prime | 100% | 48.5 | 12.8 |
Available documents
Owner's manual — 33722 (Generac)Parts manual — Generac Mobile Diesel Generator Brochure (Generac)