Service parts for the L439
Grouped by system, with how many of each the parts manual calls for.
Fuel system
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
| Fuel | Diesel |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 40 kW |
| Prime power | 40 kW |
| Emissions | Not specified |
| Controller | Not specified |
| Oil capacity | 10.0 L |
| Alternator | 4045 (4-pole, Class H insulation) |
| Voltage options | 120 V, 240 V |
| Phase | Single |
| Rated current | 100 A |
| Power factor | 0.8 |
| Circuit breaker | 150 A |
| Battery group | Not specified |
| Battery voltage | 12 V |
| Battery quantity | 1 |
| Coolant capacity | 10 L |
| Max ambient | 40 °C |
| Dimensions (L×W×H) | 1500×800×700 mm |
| Dry weight | 200 kg |
| Sound level | 75.0 dBA @ 7 m |
| Fuel tank | 200.0 L |
| Tank runtime | 8 hr |
Maintenance & consumables
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Fuel filter | Fuel filter (ring clamp) | 24-51005 | Amazon eBay $24.99 KuduParts $18.00 |
Common questions
What size generator is the Northern Lights L439?
The Northern Lights L439 is rated 40 kW standby.
What kind of fuel does the Northern Lights L439 run on?
The Northern Lights L439 runs on Diesel.
Which alternator is fitted to the Northern Lights L439?
The Northern Lights L439 uses a 4045 alternator. It has 4 poles. Insulation class H.
What fuel filter does the Northern Lights L439 use?
The Northern Lights L439 uses fuel filter part number 24-51005.
Troubleshooting
6Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| Battery will not charge | Loose or corroded connections: * Clean and tighten battery connections. Sulfated or worn out batteries: e Check specific gravity of each battery. ° Check electrolyte level of each battery. | Loose or corroded connections: * Clean and tighten battery connections. Sulfated or worn out batteries: e Check specific gravity of each battery. ° Check electrolyte level of each battery. |
| Starter inoperative | Loose or corroded connections: * Clean and tighten loose battery and harness plug connection. | Low battery output: ¢ Check specific gravity of each battery. Check electrolyte level of each battery. Defective electrical system ground wire: * Repair or replace. |
| Starter cranks slowly | Low battery output: Batteries too small. * Battery cables too smail. Check specific gravity of each battery. Check electrolyte level of each battery. Crankcase oil too heavy. Loose or corroded connections: ¢ Clean and tighten loose connections. | |
| Entire electrical system does not function | Check DC circuit breaker. Faulty connection: « Clean and tighten battery and harness plug connections. Sulfated or worm out batteries: * Check specific gravity and electrolyte level of each battery. | |
| Engine hard to start or will not start | Improper starting procedure. No fuel. Low battery output: e Check electrolyte level and specific gravity of battery. Excessive resistance in starting circuit: c Clean and tighten all connections on batteries. | |
| Engine runs irregularly or stalls frequently | Below normal engine temperature: e Remove and check thermostat. Clogged primary fuel filter element: c Clean or replace filter element. Clogged secondary fuel filter element: e Replace secondary filter element. Water or dirt in the fuel system. Dirty or faulty injection nozzles: c Have your dealer check injection nozzles. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing. Full Northern Lights L439 troubleshooting guide (11 entries) →
Parts
1| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 24-51005 | Fuel Filter with Metal Drain Valve | 1 | Fuel filter | Amazon eBay $24.99 KuduParts $18.00 |
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
| Rating | Load | L/h | gal/h |
|---|---|---|---|
| Prime | 50% | 12.0 | 4.3 |
| Prime | 75% | 18.0 | 6.6 |
| Prime | 100% | 24.0 | 8.5 |
| Standby | 50% | 10.0 | 3.5 |
| Standby | 75% | 15.0 | 5.3 |
| Standby | 100% | 20.0 | 7.1 |