HomeGeneracGenerac MLT4060MV

Generac MLT4060MV Generator Set

The Generac MLT4060MV is a 6 kW Diesel standby generator set powered by a Mitsubishi L3E engine. It is available at 120/240 V, single-phase, 60 Hz and rated 20 A. It holds about 4.7 L (1.2 gal) of oil and 4.3 L (1.1 gal) of coolant, with a maximum ambient rating of 49 °C. Starting uses 1 group-24 battery rated 440 CCA at 12 V. The set measures 2870×2600×7520 mm (113.0×102.4×296.1 in), weighs about 943 kg (2079 lb) and produces 68 dBA at 7 m. An integrated tank holds 213.5 L (56.4 gal), roughly 95 hours of runtime.

6 kW
Standby
0.95 L
Displacement
4.7 L
Oil capacity
3
Document types

How to read your Generac serial & model number →

Typical fuel consumption for 5–10 kW Diesel generators →

Compare with other 5–10 kW Diesel generators →

Specifications

FuelDiesel
Frequency60.0 Hz
Standby power6 kW
Prime power8 kW
EmissionsTier 4 Final
ControllerAnalog controls, Power Zone (if equipped), Power Zone Plus, Power Zone Plus (if equipped), Standard Analog
Oil capacity4.7 L
AlternatorMarathon 201CSA5411 (Class F insulation)
Voltage options120/240 V
Phase1
Rated current20 A
Power factor1
Circuit breaker30 A
Battery group24
Battery cranking440 CCA
Battery voltage12 V
Battery quantity1
Coolant capacity4.3 L
Max ambient49 °C
Dimensions (L×W×H)2870×2600×7520 mm
Dry weight943 kg
Wet weight1126 kg
Sound level68.0 dBA @ 7 m
Fuel tank213.5 L
Tank runtime95 hr

Engine

Mitsubishi L3E
Oil capacity5.0 L
Coolant capacity4.3 L
Displacement0.95 L
AspirationNatural
Rated speed1800 rpm

Maintenance & consumables

for the Mitsubishi L3E
ItemSpecCapacityPart #Interval
Air filter750 hr
Fuel filter1000 hr
Oil filterFull flow, spin-on type1000 hr
Battery500 hr
Belt1000 hr
Coolant4.3250 hr
Oil5.2 L1000 hr
Spark plug1000 hr

Service intervals

21
ItemActionHoursMonthsNotes
Coolant levelCheck8 hrDaily or before use
Electrical connectionsCheck8 hrDaily or before use
Fuel levelCheck8 hrDaily or before use
Oil levelCheck8 hrDaily or before use
Tire pressureCheck8 hrDaily or before use
Engine bolts and nutsAdjust50 hrFirst service — Initial 50 hours
Engine oil and oil filterChange50 hrFirst service — Change after the initial 50 hours of operation, then at the appropriate regularly scheduled interval thereafter
Engine oil and oil filterReplace50 hrFirst service — Initial 50 hours, then yearly or 100 hours
Replace engine oil and oil filterChange50 hrFirst service — Mitsubishi engine, after initial 50 hours, then at regular interval thereafter
Air cleanerCheck250 hrInspect
Fuel filterReplace250 hr
Belt and belt tensionInspect400 hrInspect and adjust
Fuel tankDrain400 hrDrain water from fuel tank
Glow plugsCheck500 hrDiesel engines
Leveling jacksLubricate750 hr
Air cleaner elementReplace12 moReplace yearly, or after six cleanings, whichever occurs first (Mitsubishi engine guide)
Jack Maintenance (lubricate gearing/handle)Lubricate12 moPerform at least annually
Replace air cleaner elementReplace12 moKubota engine: yearly, or after six cleanings, whichever occurs first
Trailer Wheel Bearings LubricationLubricate12 moMinimum every 12 months or 12,000 miles (19,312 km)
Trailer wheel bearingsLubricate12 moMinimum recommended lubrication is every 12 months or 12,000 miles (19,312 km)
Winch brake assemblyClean6 moClean and grease brake assembly per winch preventive maintenance schedule (semi-annually)

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

10
TypeItemValueUnitCondition
PressureEngine oil pressure, normal operating35-80psi (241-552 kPa)engine running
TemperatureEngine coolant temperature, normal operating100-230°F (38-110°C)engine running
TemperatureHigh Coolant Temperature Shutdown Threshold210°F99°C
TorqueWheel lug nuts, first pass20-25ft-lb (27-33 Nm)first pass
TorqueWheel lug nuts, second pass50-60ft-lb (67-81 Nm)second pass
TorqueWheel lug nuts, third pass90-120ft-lb (122-162 Nm)third pass
VoltageEngine/DC battery voltage (VBAT)13.5-15V12-volt system, engine running
VoltageGFCI Outlet / Ballast Supply Voltage120 ±5V
VoltageTransformer Stabilized Voltage240-260VACafter strike, drops then rises and stabilizes
VoltageTransformer Strike Voltageapproximately 400VACwhen bulb strikes/induces an arc

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
Coolant50% glycol, 50% waterbelow 49°CStandard mixture; 60/40 and heated options available for cold weather
Coolant50% glycol, 50% water or 60% glycol, 40% waterbelow 49°CLiquid cooled engines with standard 50/50 mixture or optional cold-weather 60/40 configuration
Coolant50/50 glycol/water or 60/40below 49°CLiquid cooled diesel engines
Coolant40% water / 60% antifreezeabove -36°CFreezing point -34°F (-36°C); maximum freeze protection is 60% antifreeze
Coolant50% water / 50% antifreezeabove -24°CFreezing point -12°F (-24°C); mix demineralized/distilled water with coolant, not hard water
Engine oilSAE 0W-20 Syntheticbelow -18°CFor use below -0°F / -18°C
Engine oilSAE 10WFrom engine oil viscosity chart decal
Engine oilSAE 15W-40From engine oil viscosity chart decal
Engine oilSAE 30WFrom engine oil viscosity chart decal
Engine oilSAE 40WFrom engine oil viscosity chart decal
FuelNo. 2D diesel (above freezing) / No. 1D diesel (at or below freezing); climatized 1D/2D mix also usable in some areasUltra-low-sulfur diesel onlyDo NOT use home heating oil or bio-diesel fuel
FuelUltra-low-sulfur diesel No. 1D or No. 2DNo. 1D when at or below freezing; No. 2D when above freezing; climatized fuel acceptable
FuelUltra-low-sulfur diesel; No. 1D below freezing, No. 2D above freezing (climatized 1D/2D blend acceptable in some areas)216.0 LDO NOT use home heating oil or bio-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.

Procedures

9
Jack Maintenance maintenance
  1. Apply automotive grease to internal gearing via jack cover or grease fitting near crank (side-wind models)
  2. Rotate jack handle to distribute grease evenly
  3. Apply lightweight oil to handle unit at both sides of tube (side-wind models)
  4. Lubricate caster wheel axle bolt/nut assembly with lightweight oil if equipped
  5. Apply lightweight oil to screw stem (top-wind models)
RPM Quick Drain maintenance

Tools: RPM Quick Drain system hardware

  1. Convenient - no need to reach under machines
  2. Purges and extracts from the sump
  3. Evacuates sump directly to final containment via zero leak quick disconnect
  4. No spills, dripping filters, drain pans or intermediate containers needed
  5. Completes engine oil and filter change in less than 10 minutes
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 until new grease is visible around gun nozzle
  4. Wipe excess grease from hub with clean cloth
  5. Replace rubber plug
Winch Preventive Maintenance maintenance

⚠ Replace cable immediately if damaged

⚠ Replace brake if slippage detected

  1. Check winch is free of dirt, oil, grease, water, and foreign substances
  2. Ensure all mounting bolts tightened to recommended torque values
  3. Check connections are securely tightened and free of corrosion
  4. Inspect cable for damage: cuts, knots, crushed or frayed portions, broken strands
  5. Check brake for slippage or drift by visual inspection when winch is under load
Raising the Mast operation

⚠ Do not extend mast beyond the colored mark on the second mast section

⚠ Stop immediately if the mast hangs up or winch cable develops slack

  1. Set up and level the unit
  2. Check both sets of mast cables for wear or damage; verify centered in pulleys
  3. Press and hold winch control toggle switch upward to telescope mast to desired height
  4. Rotate mast by loosening rotation knob, aim lights, then tighten knob
Shutting Down the Unit - Standard Controls operation
  1. Remove all loads from the outlets
  2. Switch individual circuit breakers for each light OFF (O)
  3. Switch the main circuit breaker OFF (O)
  4. Move the control power switch to STOP
Starting the Engine - Analog Controls operation

⚠ Do not continuously crank engine for more than ten seconds

⚠ Never start the engine with circuit breakers switched on

  1. Verify main circuit breaker and individual light breakers are OFF (O)
  2. Turn key to GLOW PLUG position, hold 10-15 seconds until glow plug indicator turns red
  3. Turn key to START position, hold until engine cranks and starts
  4. Release key; it moves to RUN position
  5. Allow engine to reach normal operating temperature before switching on loads
Towing the Unit operation

⚠ Maximum highway towing speed 55 mph (88.5 km/h); off-road 10 mph (16 km/h) or less

Tools: grease gun

  1. Raise rear jack and release locking pin into travel position
  2. Raise outrigger jacks and slide outriggers into frame until locking pins snap
  3. Use tongue jack to raise/lower trailer onto hitch; lock coupling and attach safety chains
  4. Lubricate grease fittings on leveling jacks
  5. Connect trailer wiring to tow vehicle and check lights
  6. Check wheel lugs; tighten in sequence to specification if removed
  7. Check tire inflation
Lowering the Mast Manually repair

⚠ Continuous use of this procedure could damage the planetary gear brake of the winch

Tools: 3/8 in. hex-wrench

  1. Remove power cables from the two terminals on the winch motor assembly
  2. Remove two flange head screws securing winch motor assembly, retain for reassembly
  3. Carefully remove the motor assembly, keeping the two pieces together
  4. Insert a 3/8 in. hex-wrench into the sleeve bearing
  5. Rotate the wrench counter-clockwise to lower the mast, stopping if slack develops
  6. Install the winch motor assembly and secure with screws once mast is fully down

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 size generator is the Generac MLT4060MV?

The Generac MLT4060MV is rated 6 kW standby.

What engine is in the Generac MLT4060MV?

The Generac MLT4060MV is powered by the Mitsubishi L3E engine.

Is the Generac MLT4060MV diesel or gas?

The Generac MLT4060MV runs on Diesel.

What is the oil capacity of the Generac MLT4060MV?

The Mitsubishi L3E engine in the Generac MLT4060MV has an oil capacity of 5.0 liters.

Which alternator is fitted to the Generac MLT4060MV?

The Generac MLT4060MV uses a Marathon 201CSA5411 alternator. Insulation class F.

Troubleshooting

6

Symptoms & remedies

SymptomCauseRemedy
Mast Lights OFF but ballast indicators on control panel ONLight fixture too hotAllow light fixture to cool 10-15 minutes before restarting.
Mast Lights OFF and ballast indicators on control panel OFFLighting connections looseCheck wire connections: • Inside control box • Inside each ballast box
Generator output incorrectCheck voltage to ballasts by checking voltage to the GFCI outlet. Correct incoming voltage is 120 V, ±5 V. If voltage is incorrect, engine speed may need to be adjusted, or generator may require service.
Transformer output lowVerify voltage from transformer: When a bulb strikes (induces an arc), transformer voltage should be approximately 400 VAC. Next, voltage should drop, slowly rise, then stabilize at 240–260 VAC. On hard-wired models, remove mast junction box cover and insert wire probes into the connector blocks of the light and ground. If correct voltage is not achieved, check the capacitor to determine if capacitor or coil must be replaced.
Mast Lights ON but light output lowFixture and/or lens is dirtyClean components: • Reflective surface of light fixture • Inside and outside surface of glass lens IMPORTANT NOTE: Clean components only with mild soap and water. Other chemicals may damage surfaces and glass.
Electrical connections damaged or looseCheck: • Mast coil cord • Mast junction box • Mast light connections

Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing. Full Generac MLT4060MV troubleshooting guide (19 entries) →

Parts

4
Part #DescriptionQtySystem
10000034752LED modules and driversService part / kit Amazon eBay
209649Form: SFC626B1Service part / kit Amazon eBay
MILT3060240 VAC 50 Amp Twistlock Outlets1Service part / kit Amazon eBay
MIT3080240 VAC 30 Amp Twistlock Outlets1Service part / kit Amazon eBay $319.99

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
Continuous1.140.301
Continuous100%2.230.59
Prime100%2.230.59
Standby1.140.301
Standby100%2.230.59

Available documents

Spec sheet (Generac)Reference (Generac)Owner's manual (Generac)Owner's manual — 33298 (Generac)