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Magnum MMG185 Generator Set

The Magnum MMG185 is a 177 kW (221 kVA) diesel standby generator set powered by a John Deere PE6068HF485 engine. It is available at 120/208 V, 277/480 V and 120/240 V, three-phase and 60 Hz. It holds about 13.7 L (3.6 gal) of oil and 29.8 L (7.9 gal) of coolant, with a maximum ambient rating of 49 °C. Starting uses battery rated 1000 CCA. The set measures 5330×2180×2360 mm (209.8×85.8×92.9 in), weighs about 3833 kg (8450 lb) and produces 68 dBA at 7 m. An integrated tank holds 1294.6 L (342.0 gal), roughly 25 hours of runtime. The same PE6068HF485 engine also powers generator sets from John Deere.

177 kW
Standby
6.8 L
Displacement
13.7 L
Oil capacity
2
Document types

Specifications

Fueldiesel
Frequency60.0 Hz
Standby power177 kW
Standby kVA221
Prime power162 kW
EmissionsTier III
ControllerMicroprocessor-based controller
Oil capacity13.7 L
Voltage options120/208 V, 277/480 V, 120/240 V
Phasethree
Circuit breaker700 A
Battery cranking1000 CCA
Max ambient49 °C
Dimensions (L×W×H)5330×2180×2360 mm
Dry weight3833 kg
Sound level68.0 dBA @ 7 m
Fuel tank1294.6 L
Tank runtime25 hr

Engine

John Deere PE6068HF485
Oil capacity13.7 L
Coolant capacity29.8 L
Displacement6.8 L
Aspirationturbocharged
Rated speed1800 rpm

Maintenance & consumables

for the John Deere PE6068HF485
ItemSpecCapacityPart #Interval
Air filter find
Fuel filter find
Oil filter find
Belt find
Coolant
Oil

Common questions

What is the power rating of the Magnum MMG185?

The Magnum MMG185 is rated 177 kW standby (221.0 kVA).

What engine does the Magnum MMG185 use?

The Magnum MMG185 is powered by the John Deere PE6068HF485 engine.

What fuel does the Magnum MMG185 use?

The Magnum MMG185 runs on diesel.

What is the oil capacity of the Magnum MMG185?

The John Deere PE6068HF485 engine in the Magnum MMG185 has an oil capacity of 13.7 liters.

Troubleshooting

8

Fault codes

CodeMeaning
SDSensor fail (FLS)
WRNWarning (WRN)

Symptoms & remedies

SymptomCauseRemedy
LOW FUEL LEVEL SHUT DOWNFuel level on the Liquid Crystal Display (LCD) window is low or fuel tank has leaks.Check the fuel level and ensure it is not running dry. Check for leaks in the fuel tank.
LOW OIL PRESSURE SHUT DOWNEngine oil pressure is less than 20 psi (138 kPa).Check engine oil level and add oil if required. Visually inspect the engine for oil leaks.
LOW COOLANT LEVEL SHUT DOWNCoolant level in the radiator is low or coolant lines have visible leaks.Check the coolant level and add coolant if necessary. Inspect for leaks in coolant hoses, engine block, and water pump.
HIGH COOLANT TEMPERATURE SHUT DOWNCoolant temperature is 230°F (110°C) or more.Check coolant level in the overflow jug and add coolant if necessary. Inspect radiator, coolant hoses, engine block, water pump for leaks. Check serpentine drive belt tension.
OVERCRANK SHUT DOWNEngine will not start.Check fuel level in tank and proper operation of the fuel pump. Check air filter for blockage.
OVERSPEED OR UNDERSPEED SHUT DOWNEngine speed is above or below 60.0 Hz.Disconnect all loads and restart the generator to read frequency (Hz). Adjust engine speed as necessary.

Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.

Parts

2
Part #DescriptionQtySystem
100-001Air Filter1Air filter PartsGeek dieselpartscenter $75.38
30175Decal, UN31A Tank Caution (Optional)1Service part / kit PartsGeek FridayParts $85.00

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

RatingLoadL/hgal/h
Prime65.8
Prime50%28.86.6
Prime75%43.29.5
Prime100%57.512.3
Standby
Standby100%28.0

Available documents

Spec sheet — MMG185 Mobile (Magnum)Service manual — MMG235 (Operation) (Magnum)