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Magnum MLT4080 Generator Set

The Magnum MLT4080 is a 11.5 kW Diesel standby generator set powered by a Kubota D1105-E3BG engine. It is available at 120 V and 240 V, single-phase, 60 Hz and rated 66 A. It holds about 5.1 L (1.3 gal) of oil and 4.5 L (1.2 gal) of coolant. Starting uses 1 group-24 battery rated 440 CCA at 12 V. The set weighs about 777 kg (1713 lb). An integrated tank holds 114 L (30.1 gal), roughly 43 hours of runtime. The same D1105-E3BG engine also powers generator sets from Generac and John Deere.

11 kW
Standby
1.12 L
Displacement
5.1 L
Oil capacity
2
Document types

Typical fuel consumption for 10–15 kW Diesel generators →

Compare with other 10–15 kW Diesel generators →

Service parts for the MLT4080

Grouped by system, with how many of each the parts manual calls for.

Air intake

1 required

Fuel system

1 required
16686Fuel filtersee priceeBay

Oil system

1 required

Prices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.

Specifications

FuelDiesel
Frequency60.0 Hz
Standby power11 kW
Prime power10 kW
Emissions4f
Oil capacity5.1 L
AlternatorMarathon 201CSA5412
Voltage options120 V, 240 V
Phase1
Rated current66 (120V) / 33 (240V) A
Power factor1
Circuit breaker40 A
Battery group24
Battery cranking440 CCA
Battery voltage12V V
Battery quantity1
Coolant capacity4.5 L
Dry weight777 kg
Wet weight874 kg
Fuel tank114.0 L
Tank runtime43 hr

Engine

Kubota D1105-E3BG
Oil capacity5.1 L
Coolant capacity4.5 L
Displacement1.12 L
AspirationLiquid Cooled Diesel
Rated speed1800 rpm

Maintenance & consumables

for the Kubota D1105-E3BG
ItemSpecCapacityPart #Interval
Air filterDry type cartridge16444 Amazon $370.99 eBay
Fuel filterReplaceable element16686500 hr eBay
Oil filterSpin-on type16691250 hr Amazon $42.50 eBay
Battery250 hr
Belt400 hr
Coolant
OilChange the engine oil and oil filter after the initial 50 hours of operation, then at the appropriate interval thereafter.50 hr
Spark plug

Service intervals

28
ItemActionHoursMonthsNotes
All Electrical ConnectionsCheck50 hrMitsubishi schedule
Fuel Pipes And Clamp BandsCheck50 hrKubota
Light Tower WinchInspect50 hrInspect for proper operation
Radiator FinsClean50 hrInspect for debris, clean as required
Air Cleaner ElementClean1000 hrKubota
Fan Belt TightnessCheck100 hrKubota
Fuel FilterClean100 hrKubota
Radiator Hoses And Clamp BandsCheck100 hrKubota
Water SeparatorDrain100 hrKubota
Engine OilChange200 hrFirst service — Kubota; change after initial 50 hours, then at interval
Intake Air LineCheck200 hrKubota
Oil Filter CartridgeReplace200 hrFirst service — Kubota; after initial 50 hours
Air CleanerCheck250 hrMitsubishi
Bolts And Nuts On The EngineOther250 hrFirst service — Retighten; after initial 50 hours (Mitsubishi)
Engine Oil and Oil FilterChange250 hrFirst service — Mitsubishi; perform after initial 50 hours, then regularly scheduled interval
Fuel TankDrain1000 hrDrain water (Mitsubishi)
Fan BeltReplace400 hrKubota
Fuel Filter CartridgeReplace400 hrKubota
Water SeparatorClean400 hrKubota
Fuel FilterReplace500 hrMitsubishi
Glow PlugsCheck500 hrMitsubishi
Leveling JacksLubricate500 hrMitsubishi
Sediment In Fuel TankOther500 hrRemove (Kubota)
Heated Fuel Filter (If Equipped)Replace1000 hrMitsubishi
Water SedimenterDrain1000 hrMitsubishi
Air Filter ElementReplace12 moKubota; yearly or after six cleanings, whichever occurs first
Trailer Wheel BearingsLubricate12 moevery 12 months or 12,000 miles (19,312 km)
Winch (manual)Lubricate12 mogears, ratchet pivot point and shaft bushings

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

5
TypeItemValueUnitCondition
TorqueWheel lug nuts - first pass20-25ft-lbs (27-33 Nm)
TorqueWheel lug nuts - second pass50-60ft-lbs (67-81 Nm)
TorqueWheel lug nuts - third pass90-120ft-lbs (122-162 Nm)
VoltageIncoming voltage to ballast120V +/- 5V
VoltageTransformer output at light strikeapproximately 400VAC striking, stabilizing 240-260VACVAC

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
Coolant60/4060% Ethylene glycolbelow 48°CCooling system capable of operating at 120°F ambient

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

Procedures

5
Trailer Wheel Bearing Lubrication maintenance

Tools: grease gun

  1. Remove small rubber plug on grease cap
  2. Attach standard grease gun fitting to grease zerk fitting
  3. Pump grease into fitting until new grease is visible around nozzle
  4. Wipe excess grease from hub and replace rubber plug
Light Tower Set Up operation

⚠ Mast extends up to 30 ft (9.14 m); make sure area above unit is open and clear of overhead wires

  1. Locate unit at ground level or higher than illuminated area for maximum light coverage
  2. Place unit on firm, relatively flat ground and block the wheels
  3. Rotate tongue jack 90 degrees, raise trailer tongue off towing vehicle
  4. Connect a good earthen ground to grounding stud on frame near trailer tongue
  5. Pull outrigger locking pins, extend each outrigger, rotate outrigger jacks 90 degrees with pad facing down
  6. Rotate rear jack 90 degrees, level trailer using all four jacks
  7. Adjust lamps by loosening wing nuts on trunnion, aim, tighten hardware, connect to junction box
Lowering the Mast operation

⚠ STOP IMMEDIATELY if mast hangs up or winch cable develops slack

  1. Shut down lights and engine, allow lights to cool 10-15 minutes
  2. Loosen mast rotation knob, align white arrows until stop tabs touch, tighten knob
  3. Turn upper mast winch handle counterclockwise to collapse mast to lowest position
  4. Release mast lock by pulling safety pin, turn lower mast winch handle counterclockwise until mast rests in transport cradle
  5. Insert mast cradle locking pin and secure with safety pin
Raising the Mast operation

⚠ Never raise or lower mast while unit is operating

⚠ Do not extend mast beyond colored mark on middle mast tube

  1. Set up and level the unit with outriggers extended
  2. Remove mast cradle locking pin from mast cradle
  3. Check mast cables for wear/damage, ensure properly centered in pulleys, check electrical cord
  4. Ensure area around unit is clear before raising mast to vertical
  5. Remove safety pin from mast lock bar, use lower mast winch handle to raise mast until vertical and locked, secure with safety pin
  6. Use upper mast winch to telescope mast to desired height, extending slowly
  7. Rotate mast by loosening mast rotation knob, turn to desired direction, tighten knob
Starting the Unit operation

⚠ Excessive cranking will cause damage to starter

⚠ If oil pressure not obtained within 15 seconds, low oil automatic shutdown will stop engine

  1. Check main circuit breaker and individual light breakers are OFF
  2. Turn key to GLOW PLUG position and hold 5 seconds or until glow plug indicator turns red (Kubota has no glow plug indicator)
  3. Turn key to START position and hold until engine cranks and starts, release key to RUN position
  4. Do not crank engine longer than 10 seconds at a time; wait 30 seconds between attempts
  5. Allow engine to reach normal operating temperature before switching on loads

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 Magnum MLT4080?

The Magnum MLT4080 is rated 11 kW standby.

What engine is in the Magnum MLT4080?

The Magnum MLT4080 is powered by the Kubota D1105-E3BG engine.

What kind of fuel does the Magnum MLT4080 run on?

The Magnum MLT4080 runs on Diesel.

What is the oil capacity of the Magnum MLT4080?

The Kubota D1105-E3BG engine in the Magnum MLT4080 has an oil capacity of 5.1 liters.

What alternator does the Magnum MLT4080 use?

The Magnum MLT4080 uses a Marathon 201CSA5412 alternator.

What oil filter does the Magnum MLT4080 use?

The Magnum MLT4080 uses oil filter part number 16691.

What fuel filter fits the Magnum MLT4080?

The Magnum MLT4080 uses fuel filter part number 16686.

What air filter does the Magnum MLT4080 use?

The Magnum MLT4080 uses air filter part number 16444.

Troubleshooting

5

Symptoms & remedies

SymptomRemedy
Mast light is too hot.Allow light to cool 10-15 minutes before restarting.
Faulty bulb connection.Check that the bulb is tight in the socket.
Bulb broken.Check for broken arc tube or outer bulb jacket, broken or loose components in bulb envelope or blackening/deposits inside tube.
Mast lights off and ballast indicators on control panel are off.1. Check the connections inside the control box and inside each ballast box. 2. Generator output incorrect. Check the incoming voltage to the ballast by checking the available voltage on the duplex receptacle. Incoming voltage should be 120V +/- 5V. If voltage is incorrect, the engine speed may need to be adjusted or generator may require service. 3. Low transformer output. The voltage from the transformer should read approximately 400VAC as the light 'strikes' (induces an arc), then drop and slowly rise back up to stabilize at 240-260VAC. On quick disconnect models, measure across the junction box terminals when the light is unplugged. On hard wired models, remove the mast junction box cover and insert the wire probes into the connector blocks for the light and ground. If proper voltage is not achieved, perform capacitor check to determine if the capacitor or coil needs to be replaced.
Mast lights on but the light output is low.1. Fixture or lens are dirty. Clean reflective surface inside fixture and both inside and outside surface of glass lens. Use mild soap and water to clean lens. Other chemicals may have an adverse effect on the glass. 2. Bulb worn due to normal use. Replace bulb. 3. Check the mast coil cord, mast junction box and mast light connections. 4. Generator output incorrect. Check the incoming voltage to the ballast. Incoming voltage should be 120V +/- 5V. If voltage is incorrect, engine speed may need to be adjusted or generator may require service. 5. Low transformer output. The voltage from the transformer should

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

Parts

1
Part #DescriptionQtySystem
10585GService part / kit 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

RatingLoadL/hgal/h
Prime100%1.780.47

Available documents

Spec sheet (Magnum)Operator's manual (Magnum)
Full service, cheapest listings

Priced items from this model's own parts manual.

Air filter 16444$370.99
Oil filter 16691$42.50
2 priced items$413.49