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Isuzu 4LE1NYGV-03 or 4LE1NYGV-03E Engine

The Isuzu 4LE1NYGV-03 or 4LE1NYGV-03E is a 2.2 L engine rated at 1800 rpm. It powers generator sets from Magnum, including the MLT5200IV. It holds 8.1 L (2.1 gal) of oil and 11 L (2.9 gal) of coolant.

Also known as: Isuzu 4LE1NYGV-03 or 4LE1NYGV-03E

2.2 L
Displacement
1800 rpm
Rated speed
8.1 L
Oil capacity

Engine specifications

Oil capacity8.1 L
Coolant capacity11.0 L
Displacement2.2 L
Rated speed1800 rpm

Generator sets powered by this engine

1
Magnum MLT5200IV

Common problems

6
  • Mast lights on but the light output is low
    Fix: 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 read approximately 400 VAC as the light “strikes” (induces an arc), then drop and slowly rise back up to stabilize at 240-260 VAC. 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 off but ballast indicators on control panel are on
    Fix: 1. Mast light is too hot. Allow light to cool 10-15 minutes before restarting. 2. Faulty bulb connection. Check that the bulb is tight in the socket. 3. Bulb broken. Check for broken arc tube or outer bulb jacket, broken or loose components in bulb envelope or blackening/deposits inside tube. 4. Check the connections inside the mast junction box and each mast light housing/socket. 5. Check the mast electrical cord for damage and check the cord connections inside the control box.
  • Mast lights off and ballast indicators on control panel are off
    Fix: 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 400 VAC as the light “strikes” (induces an arc), then drop and slowly rise back up to stabilize at 240-260 VAC. 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 light is too hot
    Fix: Allow light to cool 10-15 minutes before restarting.
  • Faulty bulb connection
    Fix: Check that the bulb is tight in the socket.
  • Bulb broken
    Fix: Check for broken arc tube or outer bulb jacket, broken or loose components in bulb envelope or blackening/deposits inside tube.

Compiled from service & troubleshooting documentation across every generator set that uses the Isuzu 4LE1NYGV-03 or 4LE1NYGV-03E.

Service intervals

4
ItemActionHoursMonthsNotes
Engine Oil And Oil FilterReplace50 hrFirst service — Mitsubishi engine schedule; after initial 50 hours, then regularly scheduled interval
Bolts And Nuts On The EngineAdjustFirst service — Retighten; after initial 50 hours, then regularly scheduled interval; Mitsubishi engine schedule
JacksLubricate12 moJack maintenance to be performed at least annually
Trailer Wheel BearingsLubricate12 moMinimum recommended lubrication every 12 months or 12,000 miles (19,312 km)

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

8
TypeItemValueUnitCondition
SpeedEngine operating speed1800rpm
TemperatureMaximum ambient operating temperature120°Fshut down if above; 49°C
TorqueWheel lug nuts, first pass20-25ft-lbsfirst pass
TorqueWheel lug nuts, second pass50-60ft-lbssecond pass
TorqueWheel lug nuts, third pass90-120ft-lbsthird pass
VoltageIncoming voltage to ballast120V+/- 5V
VoltageTransformer output at light strikeapproximately 400VACas light strikes
VoltageTransformer output stabilized240-260VACstabilized

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
Fueldiesel212.0 LUse clean diesel fuel only; fuel tank volume

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
Light Tower Set Up installation

⚠ The mast extends up to 25 ft (7.6 m). Make sure area above the unit is open and clear of overhead wires and obstructions.

⚠ Consult local codes for proper grounding requirements.

  1. Locate unit at ground level or in a spot higher than the area being illuminated.
  2. Place unit on firm, relatively flat ground. Block wheels to keep trailer from moving.
  3. Pull locking pin on tongue jack, rotate 90°, replace pin. Turn jack handle clockwise to raise trailer tongue off towing vehicle.
  4. Connect earthen ground to grounding stud on trailer frame near trailer tongue.
  5. Pull locking pin on each outrigger and pull out until spring-loaded pin snaps back. Pull pin on outrigger jack and rotate 90° so jack pad faces down.
  6. Pull locking pin on rear jack and rotate 90° until spring-loaded pin snaps. Turn jack handle clockwise to level trailer. Adjust all four jacks until firmly in contact with ground and trailer is level.
  7. Adjust lamps by loosening wing nuts on trunnion, aim as desired, tighten hardware. Ensure lamps connected to junction box.
Jack Maintenance maintenance
  1. Side-wind models: apply small amount of automotive grease to internal gearing by removing jack cover or using needle nose applicator or standard grease gun on lubrication point near crank. Rotate jack
  2. Side-wind models: apply lightweight oil to handle unit at both sides of tube.
  3. Side-wind models: if equipped, lubricate axle bolt and nut assembly of caster wheel with same lightweight oil.
  4. Top-wind models: apply lightweight oil to screw stem.
Lower Radiator Hose Heater Option - Use and Maintenance maintenance

⚠ Improper use of the lower radiator hose heater could result in damage to the engine or personal injury. Do not modify the location of the lower radiator hose heater.

  1. Ensure cooling system is full of proper mixture of water and engine coolant before each heater use.
  2. Heater designed for all-night operation; 2-5 hours heating prior to starting usually sufficient.
  3. Unit must be level to maintain proper orientation of heater.
  4. Use only undamaged, outdoor rated, three-prong grounded 120VAC extension cord with minimum 10A rating. Connect to properly grounded 120VAC, GFCI receptacle.
  5. Before starting engine, unplug extension cord from power first, then unplug heater cordset from extension cord.
Trailer Wheel Bearings 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 visible around nozzle.
  4. Use high quality grease made specifically for wheel bearings.
  5. Wipe excess grease from hub with clean cloth and replace rubber plug.
Winch Preventive Maintenance maintenance

⚠ Failure to replace a damaged cable could result in breakage.

  1. Keep winch free of dirt, oil, grease, water and other substances.
  2. Check all mounting bolts and ensure tightened to recommended torque values. Replace damaged fasteners.
  3. Periodically check all connections to ensure tight and free of corrosion.
  4. Check cable for visible damage every time winch is operated. Replace cable immediately if damaged.
  5. Regularly check brake for slippage or drift. If winch drum continues to turn after controls released, brake may need replacement.
  6. Periodically clean and grease brake assembly.
  7. Check motor brushes periodically and replace when necessary.
Lifting the Unit operation
  1. Attach slings, chains or hooks directly to central lift point located on mast between two forklift pockets.
  2. Make sure lifting equipment has sufficient capacity.
  3. Stay aware of people and objects around unit while moving.
  4. Use upper or lower forklift pockets with care. Approach perpendicular to avoid damage. Ensure mast winch handles or obstructions clear of forklift tines.
Light Operation operation

⚠ NEVER OPERATE THE LIGHTS WITHOUT THE PROTECTIVE LENS COVER, OR WITH A LENS COVER THAT IS CRACKED OR DAMAGED.

⚠ Bulbs become extremely hot when in use. Allow bulb fixture to cool 10-15 minutes before handling or lowering the mast.

  1. Once engine up to temperature and running smoothly, switch main circuit breaker to ON/I.
  2. Switch each individual light circuit breaker to ON/I, one at a time.
  3. Ballast indicator lights will come on and brighten as lights warm up, then remain on.
  4. If an indicator light does not come on, ballast may need service. If lit but light not illuminated, check bulb or mast wiring.
  5. Lights require 5-15 minutes warm up. After shutdown, require about 10 minutes cool down before restarting.
  6. Uses four 1000W bulbs. Wipe bulbs clean when replacing.
Lowering the Mast Electrically operation

⚠ STOP IMMEDIATELY if the mast hangs up, or the winch cable begins to develop slack.

  1. Shut down lights and engine. Allow lights to cool 10-15 minutes.
  2. If trailer will be moved, rotate mast so lights face back of unit: loosen mast rotation knob, rotate until white arrows align and metal stop tabs touch, tighten knob.
  3. Press and hold winch control toggle switch downward to collapse mast to lowest position. Ensure electrical cord does not get caught or pinched.
Raising the Mast operation

⚠ The unit must be leveled with the outriggers extended before raising the mast. The outriggers must remain extended while the mast is up.

⚠ Do not start the unit if insulation on the electrical cord is cut or worn through.

⚠ Never raise or lower the mast while the unit is operating.

  1. Set up and level the unit.
  2. Check mast cables for excessive wear or damage. Ensure cables centered in each pulley. Check electrical cord for damage.
  3. Press and hold winch control toggle switch upward to telescope mast to desired height. Extend slowly, ensuring coiled cord extends at top sections. If cable slack or mast stuck, STOP IMMEDIATELY.
  4. Loosen mast rotation knob at bottom of mast. Turn mast until lights face desired direction, then tighten knob.
Removing the Lights for Transportation operation
  1. Disconnect power cords from junction box at top of mast. Replace dust caps on junction box.
  2. Remove lights from mast by removing wing nut holding light fixture bracket to cross tube. Insert lights onto light storage channel inside each door, lenses facing rubber seal. Secure with wing nuts an
Shutting Down the Unit operation
  1. Remove any loads from receptacles.
  2. Switch individual light circuit breakers to OFF/O.
  3. Switch main circuit breaker to OFF/O.
  4. Turn Engine Start switch to OFF.
Starting the Unit operation

⚠ Do not crank the engine longer than 10 seconds at a time. If the engine will not start, wait 30 seconds to allow the starter motor to cool and then repeat the starting procedure.

  1. Check main circuit breaker and individual light circuit breakers are OFF/O.
  2. Turn key to GLOW PLUG position and hold for five seconds or until glow plug indicator turns red.
  3. Turn key to START position and hold until engine cranks and starts running. Release key to RUN.
  4. Once engine running, allow it 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.

Also used in

4
  • Hitachi EX40U — Excavator Compact
  • Hitachi EX50U — Excavator Compact
  • Hitachi EX55UR-3 — Excavator Compact
  • Hitachi EX58MU — Excavator Compact

Other equipment known to use this engine, via filter-application cross-reference — useful for sourcing parts even when your exact machine isn't listed elsewhere on this page.

Common questions

What is the oil capacity of the Isuzu 4LE1NYGV-03 or 4LE1NYGV-03E?

The Isuzu 4LE1NYGV-03 or 4LE1NYGV-03E engine has an oil capacity of 8.1 liters.

What is the displacement of the Isuzu 4LE1NYGV-03 or 4LE1NYGV-03E?

The Isuzu 4LE1NYGV-03 or 4LE1NYGV-03E has a displacement of 2.2 liters.

Which generators use the Isuzu 4LE1NYGV-03 or 4LE1NYGV-03E engine?

The Isuzu 4LE1NYGV-03 or 4LE1NYGV-03E powers 1 generator set(s), including Magnum MLT5200IV.

What is a common problem with the Isuzu 4LE1NYGV-03 or 4LE1NYGV-03E engine?

A commonly reported issue on generators using the Isuzu 4LE1NYGV-03 or 4LE1NYGV-03E is: Mast lights on but the light output is low. Fix: 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 read approximately 400 VAC as the light “strikes” (induces an arc), then drop and slowly rise back up to stabilize at 240-260 VAC. 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..