Service parts for the MLT4200IV
Grouped by system, with how many of each the parts manual calls for.
Fuel system
1 requiredOil system
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
| Frequency | 60.0 Hz |
|---|---|
| Standby power | 30 kW |
| Standby kVA | 40 |
| Prime power | 27 kW |
| Controller | PowerZone–DLA |
| Oil capacity | 8.0 L |
| Alternator | Marathon 334CSA3028 |
| Voltage options | 120 V, 240 V |
| Phase | single phase |
| Rated current | 167 A |
| Power factor | 1 |
| Circuit breaker | 100 A |
| Battery group | 24 |
| Battery cranking | 720 CCA |
| Battery voltage | 12.0 V |
| Battery quantity | 1 |
| Dimensions (L×W×H) | 2920×2590×2130 mm |
| Dry weight | 991 kg |
| Sound level | 70.0 dBA @ 23.0 m |
| Tank runtime | 24.5 hr |
Maintenance & consumables
for the Isuzu 4LE2TAGV-08| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Inspect and replace air filter element as required. | — | |||
| Fuel filter | 69858 | Amazon eBay $21.83 NAPA $15.34 FridayParts $36.28 | |||
| Oil filter | 670570304 | 500 hr | Amazon eBay $16.89 PartsGeek $7.98 NAPA $9.09 FridayParts $20.19 | ||
| Battery | Inspect battery condition; replace if necessary. | — | 1000 hr | ||
| Belt | Inspect and replace fan belt as required. | — | |||
| Coolant | Check coolant level daily; add coolant if needed. | — | 1000 hr | ||
| Oil | Change oil and oil filter every 500 hours after initial break-in. | 4.7 L | — | 500 hr | |
| Spark plug | — |
Compatible filters for the Isuzu 4LE2TAGV-08 — cross-referenced via Donaldson. Options to verify against your serial number, not confirmed for this exact unit.
- Air filter: Generac OE3557 Generac OE3656 Isuzu 8972319000 Isuzu 5864014350 Isuzu 8972599390
Common questions
How many kW is the Generac MLT4200IV?
The Generac MLT4200IV is rated 30 kW standby (40.2 kVA).
What engine does the Generac MLT4200IV use?
The Generac MLT4200IV is powered by the Isuzu 4LE2TAGV-08 engine.
How much oil does the Generac MLT4200IV take?
The Generac MLT4200IV has an engine oil capacity of 8 liters (8.5 US quarts), per the manufacturer specification sheet.
What is the continuous rating of the Generac MLT4200IV?
The Generac MLT4200IV is rated 27 kW prime (36 kVA), against 30 kW standby.
What is the sound level of the Generac MLT4200IV?
The Generac MLT4200IV is rated at 70.0 dBA at 23.0 m, per the manufacturer specification sheet.
How much does the Generac MLT4200IV weigh?
The Generac MLT4200IV has a dry weight of 991 kg (2184 lb).
What voltage does the Generac MLT4200IV produce?
The Generac MLT4200IV is offered in 120 V, 240 V, single phase-phase.
What size battery does the Generac MLT4200IV need?
The Generac MLT4200IV uses 1 battery, 12.0 V each, 720 CCA, group 24, per the manufacturer specification sheet.
What alternator comes on the Generac MLT4200IV?
The Generac MLT4200IV uses a Marathon 334CSA3028 alternator.
What oil filter fits the Generac MLT4200IV?
The Generac MLT4200IV uses oil filter part number 670570304.
Which fuel filter part number does the Generac MLT4200IV take?
The Generac MLT4200IV uses fuel filter part number 69858.
What air filter does the Generac MLT4200IV use?
The Generac MLT4200IV uses air filter part numbers GENERAC OE3557, GENERAC OE3656.
Troubleshooting
38Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| Unit cranks but does not start | Low fuel level | Verify fuel level in tank. |
| Unit cranks but does not start | Restricted air filter | Inspect air filter for blockage. |
| Unit cranks but does not start | Fuel flow obstructed | Inspect fuel supply hose from tank to fuel filter for cracks and abrasion; Inspect for gelled fuel in fuel system in cold weather, especially at fuel filter; Check fuel pump operation. |
| Unit cranks but does not start | Air in fuel system | Purge air from fuel system. |
| Unit cranks but does not start | Glow plug(s) inoperable | See the OEM engine manual for more information. |
| Unit starts but stumbles and dies | Low ambient temperature | Verify if ambient temperature is within unit limits. |
| Unit starts but stumbles and dies | Intake heat inoperable | Inspect engine air inlet heater function. |
| Unit starts but stumbles and dies | Air in fuel lines | Purge air from fuel lines. |
| High coolant temperature shutdown | Low coolant level | Allow engine to cool. Check coolant level in radiator. Add coolant level if needed. |
| High coolant temperature shutdown | Blockage in radiator | Inspect radiator shroud and ducting for blockage and remove any foreign matter. |
| High coolant temperature shutdown | Debris on radiator face | Inspect for visible leaks. Check tension of water pump drive belt. |
| High coolant temperature shutdown | Broken coolant pump belt | Contact a GMASD to replace. |
| High coolant temperature shutdown | Cooling fan inoperable | Remove load on generator and restart engine; Check coolant temperature and shut engine down immediately if it starts to overheat. |
| Low oil pressure shutdown | Low oil level | Check oil level. |
| Low oil pressure shutdown | Oil pump inoperable | Contact a GMASD |
| Unit stalls when export power is used | Load exceeds unit rating | Turn outlet breaker ON and load sense switch OFF, confirm generator output is 60 Hz ± 2 Hz. Reapply load. |
| Mast lights off, checking inside control box | Loose lighting connections | Inspect the connections inside the control box. |
| Mast lights off, checking inside control box | Loose mast cable connector | Verify outside connector is connected properly to inside control box. |
| Mast lights off, checking inside control box | Generator output incorrect | Check the incoming voltage to the ballast driver by checking the available voltage on the GFCI receptacle. Incoming voltage should be 120V ± 5V. If voltage is incorrect, the generator may require service. |
| One or more lights do not turn on | Light breaker tripped. | Inspect light breakers. |
| One or more lights do not turn on | Lights not turned on | Inspect electronic control to see if lights are on. Turn lights on. |
| Unit is inoperative — Read/Write configuration does not operate | Check the battery and wiring to the unit; Check the DC supply; Check the DC fuse. | |
| Unit shuts down | Check DC supply voltage is not above 35 V or below 9 V; Check the operating temperature is not above 70 °C. Check the DC fuse. | |
| Fail to Start is activated after pre-set number of attempts to start | Check wiring of fuel solenoid. Check fuel. Check battery supply. Check battery supply is present on the Fuel output of the module. Check the speed-sensing signal is present on the controller inputs. See engine manual. | |
| Continuous starting of generator when in AUTO mode | Check that there is no signal present on the Remote Start input. Check configured polarity is correct; Check the mains supply is available and within configured limits | |
| Generator fails to start on receipt of Remote Start signal. | Check Start Delay timer has timed out; Check signal is on Remote Start input. Confirm correct configuration of input is configured to be used as Remote Start; Check that the oil pressure switch or sensor is indicating low oil pressure to the controller. Depending on configuration, then set does not start if oil pressure is not low. | |
| Pre-heat inoperative | Check wiring to engine heater plugs. Check battery supply. Check battery supply is present on the Pre-heat output of module. Check pre-heat configuration is correct. | |
| Starter motor inoperative | Check wiring to starter solenoid. Check battery supply. Check battery supply is present on the Starter output of module. Ensure oil pressure switch or sensor is indicating the low oil pressure state to the controller. | |
| Engine runs but the lights do not turn on | Check Warm up timer has timed out; Ensure Inhibit Light Input 1, 2, 3 or 4 are not active on the module inputs; Check connections to the lights; The genset may not take load in MANUAL/START Mode unless there is an active load signal. | |
| Incorrect reading on engine gauges — Fail To Stop when engine is at rest | Check engine is operating correctly; Check that sensor is compatible with the controller and that the controller configuration is suited to the sensor. | |
| Low Oil Pressure operates after engine has fired | Check engine oil pressure; Check oil pressure switch/sensor and wiring; Check configured polarity (if applicable) is correct (i.e. Normally Open or Normally Closed) or that sensor is compatible with the controller and is correctly configured. | |
| High Coolant Temperature operates after engine has fired. | Check engine temperature; Check switch/sensor and wiring; Check configured polarity (if applicable) is correct (i.e. Normally Open or Normally Closed) or that sensor is compatible with the controller. | |
| Shutdown fault operates | Check relevant switch and wiring of fault indicated on LCD display; Check configuration of input. | |
| Electrical Trip fault operates | Check relevant switch and wiring of fault indicated on LCD display; Check configuration of input. | |
| Warning fault operates | Check relevant switch and wiring of fault indicated on LCD display; Check configuration of input. | |
| CAN ECU Warning / CAN ECU Shutdown | This indicates a fault condition detected by the engine ECU and transmitted to the controller. | |
| CAN Data Fail | Indicates failure of the CAN data link to the engine ECU. | Check all wiring and termination resistors (if required). |
| Controller seems to revert to an earlier configuration | When editing a configuration using the PC software it is vital that the configuration is first read from the controller before editing it. This edited configuration must then be written back to the controller for the changes to take effect; When editing a configuration using the fascia editor, be sure to press the AUTO Mode button to save the change before moving to another item or exiting the fascia editor |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Fuel consumption
| Rating | Load | L/h | gal/h |
|---|---|---|---|
| Prime | 7.95 | 2.1 | |
| Standby | 29.53 | 7.8 |
Available documents
Owner's manual — A0003354601 (Generac)
This page was generated from the 1 manufacturer document above by automated extraction; every figure shown is copied from one of them. How the data is compiled.