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Home›Engines›John Deere PE6068HFG95

John Deere PE6068HFG95 Engine

The John Deere PE6068HFG95 is a 6.8 L 6-cylinder turbocharged engine rated at 1800 rpm, producing up to 200 kW. It powers generator sets from Generac and Magnum, including the MMG205, MMG205 and MMG205 Super Start. It holds 31.2 L (8.2 gal) of oil and 29.8 L (7.9 gal) of coolant.

Also known as: John Deere PE6068HFG95

6.8 L
Displacement
6
Cylinders
1800 rpm
Rated speed
200 kW
Gross power
On this pageSpecsGenerator setsMaintenanceFAQService intervalsTorque & specsFluidsFault codesProceduresWiring

Engine specifications

Oil capacity31.2 L
Coolant capacity29.8 L
Displacement6.8 L
Cylinders6
Aspirationturbocharged
Rated speed1800 rpm
Gross power200 kW

Generator sets powered by this engine

3

Shared across brands: Generac, Magnum

Generac MMG205Magnum MMG205Magnum MMG205 Super Start

How to read your John Deere engine serial & model number →

Common problems

11
  • To Service 1
    Fix: Oil Maintenance
  • Low Oil Pressure Shutdown
    Cause: Low oil level, Oil leaking from engine, Oil pressure sender
    Fix: 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
    Cause: Low coolant level, Coolant hoses leaking, Engine block or water pump leaking
    Fix: 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
    Cause: Low coolant level, Blockage in radiator, Leakage in coolant hoses, engine block, or water pump
    Fix: 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.
  • LOW FUEL LEVEL SHUTDOWN
    Cause: Fuel level on the LCD window is low, fuel tank has leaks, fuel level sender or wiring damaged.
    Fix: Check and refill fuel. Inspect for leaks. Check fuel level sender and wiring.
  • Battery voltage is out of limits given by Batt Undervolt setpoints. Ubat
  • Exhaust Filter Cleaning enabled. 00383
  • EMERGENCY STOP 00230
  • Overspeed or Under-speed Shutdown
    Cause: Frequency setting incorrect
    Fix: 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.
  • Overcrank Shutdown
    Cause: Fuel level low, Check fuel level in tank, Check fuel pump operation, Check air filter for blockage
    Fix: See the OEM engine operator’s manual for additional information.
  • Low Fuel Level Shut-down
    Cause: Low fuel level, Unit not level, Fuel tank leaking, Damaged fuel sender or wiring
    Fix: 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).

Compiled from service & troubleshooting documentation across every generator set that uses the John Deere PE6068HFG95.

Maintenance schedule

ItemSpecCapacityPart #Interval
Air filter—
Oil31.2 qt—500 hr

Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.

Service intervals

17
ItemActionHoursMonthsNotes
Engine mountsCheck500 hr12 mo
Oil vapor recirculation system/non-return valveCheck250 hr
Air intake hoses, connections, and systemCheck500 hr
Automatic belt tensioner and belt wearCheck500 hr12 moBelt removed and checked for wear at 500 hour/12 month service interval
BatteryCheck500 hrService battery
Cooling systemCheck500 hr
Engine electrical ground connectionCheck500 hr
Engine oil and oil filterChange500 hr12 moFirst 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 elementsReplace500 hr12 mo
Leveling jack(s)Lubricate500 hr
Oil vapor recirculation filterReplace500 hr
Generator drive plate torqueCheck3000 hr36 moSee Checking Generator Drive Plate Torque
Air cleaner elementsReplace3000 hr36 mo
Alternator and fan beltsReplace3000 hr36 mo
Diesel Particulate Filter (DPF) ash removalReplace3000 hrExpected service interval at least 3,000 or 4,500 hours; by OEM authorized dealer only
FusesCheck3000 hr36 mo
ThermostatsTest3000 hr36 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
TypeItemValueUnitCondition
PressureEngine oil pressure (minimum on start)5psi (34 kPa)within five seconds
PressureEngine oil pressure (normal operating)35-80psi (241-552 kPa)
SpeedEngine governed operating speed1800rpm
SpeedOutput frequency (no load)60Hzno loads connected
TemperatureCoolant temperature (normal operating)180-200°F (82-93°C)average ambient 70°F (21°C)
TemperatureCoolant temperature gauge range150-250°F (66-121°C)
TemperatureHigh coolant temperature shutdown210°F (99°C)
TorqueGenerator drive plate bolt36 (49)ft-lbs (Nm)
TorqueGenerator drive plate bolt46 (63)ft-lbs (Nm)
TorqueGenerator drive plate bolt47 (64)ft-lbs (Nm)
TorqueWheel lug nuts - first pass20-25ft-lbs (Nm)
TorqueWheel lug nuts - second pass50-60ft-lbs (Nm)
TorqueWheel lug nuts - third pass90-120ft-lbs (Nm)
VoltageBattery voltage (normal, engine running)12-14V12 volt systems
VoltageBattery voltage (normal, engine running)24-26V24 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

FluidGradeStandardAmbientCapacityNotes
CoolantPropylene glycol base antifreezeDo not use chromate base rust inhibitor with propylene glycol base antifreeze, boosters or additivesabove -24°CMixtures (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 oilJohn Deere Plus 50 IIHigh quality detergent oil, appropriate classification and viscosity for engine type/ambient temperatureFactory filled with engine oil of a grade recommended by the engine supplier; consult IASD or engine service manual
Engine oilJohn Deere Plus 50 II recommended31.2 qtChange interval: 500 hours on John Deere Plus 50 II; 250 hours on other oils
FuelClean diesel fuel1295.0 LUse only clean diesel fuel

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Fault codes

7
CodeNameMeaningSeverityAction
Coolant temperature shutdownCoolant temperature shutdown - 230°FShutdown
Coolant temperature warningCoolant temperature warning - 220°FWarning
Fuel level shutdownFuel level shutdown - 5%Shutdown
Fuel level warningFuel level warning - 15%Warning
Oil pressure shutdownOil pressure shutdown - 20 psiShutdown
Oil pressure warningOil pressure warning - 25 psiWarning
OverspeedOverspeed protection - 115%Shutdown

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Procedures

12
Fine Voltage Adjustment adjustment
  1. With the unit running, press the Generator button.
  2. Press Enter; the voltages displayed begin flashing.
  3. Use ▲ and ▼ to adjust the voltage.
  4. 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.

  1. Shut down unit, move Control Power switch to ON (I).
  2. Press a directional arrow to enter the maintenance screens.
  3. Press ► until the Status tab shows the Power Zone™ application version (must be V4 or higher).
  4. Press any directional arrow to enter maintenance screens.
  5. Press Enter and O simultaneously to display the Configuration menu.
  6. Navigate to Config Selection, then Config to Edit, then Selected Configuration.
  7. Select Alternative Configuration 1.
  8. Enter Password Entry and enter password 4444 if applicable.
  9. Highlight Generator, then Generator voltage, then Over Voltage Alarms.
  10. Set Alarm Trip to 153V.
  11. Set Pre-alarm Trip to 151V.
  12. Press and hold Enter for five seconds until the Saving screen appears.
Checking Generator Drive Plate Torque maintenance
  1. Disconnect battery.
  2. Remove generator fan guard.
  3. Torque each of the drive plate bolts to the specification shown in the table.
  4. Install generator fan guard.
  5. Connect battery.
Force a Manual Exhaust Filter Cleaning maintenance

⚠ Check for adequate fuel level before beginning exhaust filter cleaning.

  1. Open the control door and locate the switch labeled EXHAUST FILTER CLEANING.
  2. Move and hold the switch in ON/FORCED (I) for five seconds.
  3. On the DPF Status screen verify the Regeneration indicator shows DPF Lamp - Solid.
Resetting the Maintenance Alarms maintenance
  1. With unit shut down, move Control Power switch to CONTROL ON (I).
  2. Press any directional arrow to enter the maintenance screens.
  3. Press Enter and O simultaneously to display the Configuration menu.
  4. Press ▼ to move to the Maintenance group.
  5. Press ► to access sections; highlight the Maintenance section.
  6. Press ► to access parameters and highlight the alarm to reset.
  7. Press Enter to select editable parameters; highlight Reset.
  8. Press Enter to reset the selected maintenance alarm.
  9. 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

  1. Remove the small rubber plug on the grease cap.
  2. Attach a standard grease gun fitting to the grease fitting.
  3. Pump grease into the fitting until new grease is visible around the nozzle.
  4. Wipe any excess grease from the hub with a clean cloth.
  5. 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)

  1. Perform a manual start at least once to verify correct operation.
  2. To check remote start circuit, remove wires from remote start terminal block.
  3. Press AUTO/MANUAL Mode button so LCD shows Auto Mode.
  4. Attach a minimum 16 gauge jumper wire across the two remote start terminals.
  5. Engine should crank, start and run; remove jumper to stop.
  6. Reconnect remote start switch (transfer switch) wires.
  7. Verify unit is in AUTO mode.
  8. 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.

  1. Open the control door and locate the switch labeled EXHAUST FILTER CLEANING.
  2. Move the switch to DISABLED (O).
  3. On the DPF Status screen verify the Disabled Regeneration indicator shows DPF Inhib - Solid.
Enable Exhaust Filter Cleaning operation
  1. Open the control door and locate the switch labeled EXHAUST FILTER CLEANING.
  2. Move the switch to ON/AUTO (I/O).
  3. 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.

  1. Attach a sling or hook directly to the central lift point only if devices are in good condition.
  2. Verify the equipment used to raise the unit has sufficient capacity.
  3. Keep doors and hood closed and locked while moving or lifting.
Manually Starting the Unit operation

⚠ Asphyxiation. Running engines produce carbon monoxide.

  1. Move the Control Power switch to ON (I).
  2. Press the AUTO/MANUAL Mode button to enter MANUAL mode.
  3. Press the green Engine Start (I) button to initiate startup.
  4. If engine does not start, it pauses 15 seconds; up to three crank cycles.
  5. If Fail to Start alarm, wait two minutes then press Enter to clear.
  6. Verify AC output voltage is correct (see Fine Voltage Adjustment).
  7. Check frequency (Hz) reads approximately 60 Hz with no load.
  8. Switch main circuit breaker ON (I) and add loads via receptacle breakers.
Set the Controller Clock operation
  1. Navigate to the Maintenance group and press ► to access it.
  2. Press ► to select the Time section.
  3. 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

VoltagePhaseConnectionLeadsNotes
120V3Low DeltaT1-T12 (dedicated 12 lead generator)Dedicated 12 lead generators option
208/120V3Low WyeT1-T12 (dedicated 12 lead generator)Dedicated 12 lead generators option
240/120V1Low Zig ZagT1-T12 (dedicated 12 lead generator)Dedicated 12 lead generators option
240/120V3High DeltaT1-T12 (dedicated 12 lead generator)Dedicated 12 lead generators option
480/240V1High Zig ZagT1-T12 (dedicated 12 lead generator)Dedicated 12 lead generators option
480/277V3High WyeT1-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 oil capacity of the John Deere PE6068HFG95?

The John Deere PE6068HFG95 engine has an oil capacity of 31.2 liters.

What is the displacement of the John Deere PE6068HFG95?

The John Deere PE6068HFG95 has a displacement of 6.8 liters with 6 cylinders.

Which generators use the John Deere PE6068HFG95 engine?

The John Deere PE6068HFG95 powers 3 generator set(s), including Generac MMG205, Magnum MMG205, Magnum MMG205 Super Start.

How often should you change the oil in the John Deere PE6068HFG95?

The John Deere PE6068HFG95 oil change interval is every 500 hours.

What is a common problem with the John Deere PE6068HFG95 engine?

A commonly reported issue on generators using the John Deere PE6068HFG95 is: To Service. Fix: Oil Maintenance.