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Home›Northern Lights›Northern Lights NL844

Northern Lights NL844 Generator Set

The Northern Lights NL844 is a 18.75 kW (20 kVA) Diesel prime generator set powered by a Lugger 844L engine. It is available at 120 V and 110 V, 1-phase and 60 Hz. It holds about 8 L (2.1 gal) of oil and 8 L (2.1 gal) of coolant. The set measures 1618×543×891 mm (63.7×21.4×35.1 in) and weighs about 439 kg (968 lb).

2.216 L
Displacement
8.0 L
Oil capacity
3
Document types

Specifications

FuelDiesel
Frequency60.0 Hz
Prime power18 kW
ControllerAutomatic voltage regulator
Oil capacity8.0 L
AlternatorNorthern Lights 4 pole, revolving field generator
Voltage options120 V, 240 V, 110 V, 220 V
Phase1 Ph
Power factor1.0
Battery voltage12 V
Coolant capacity8 L
Dimensions (L×W×H)1618×543×891 mm
Dry weight439 kg

Engine

Lugger 844L
Oil capacity8.0 L
Coolant capacity8.0 L
Displacement2.216 L
AspirationNaturally aspirated
Rated speed1800 rpm

Maintenance & consumables

for the Lugger 844L
ItemSpecCapacityPart #Interval
Air filterM16C, M20CL24-200011000 hr Amazon eBay $21.00 PartsGeek
Fuel filterPrimary filter element24-50012200 hr Amazon eBay $18.95 PartsGeek
Fuel filterSecondary fuel filter24-52020200 hr Amazon eBay $24.71 PartsGeek
Oil filter24-03100250 hr Amazon eBay $23.45 PartsGeek
BeltV-belt—250 hr find
Coolant50% water/50% ethylene glycol8.0 l—600 hr
Coolant filterCheck coolant level, check and flush cooling system, check and clean radiator fins.—500 hr find
OilAPI Service CC/CD/CE single viscosity or CC/CD/SF multi-viscosity8.2 L—100 hr

Common questions

What engine does the Northern Lights NL844 use?

The Northern Lights NL844 is powered by the Lugger 844L engine.

What fuel does the Northern Lights NL844 use?

The Northern Lights NL844 runs on Diesel.

What is the oil capacity of the Northern Lights NL844?

The Lugger 844L engine in the Northern Lights NL844 has an oil capacity of 8.0 liters.

What alternator does the Northern Lights NL844 use?

The Northern Lights NL844 uses a Northern Lights 4 pole, revolving field generator alternator.

Troubleshooting

13

Symptoms & remedies

SymptomCauseRemedy
Battery will not chargeLoose or corroded connections, Sulfated or worn out batteriesClean and tighten battery connections, Check specific gravity of each battery, Check electrolyte level of each battery
Starter inoperativeLoose or corroded connectionsClean and tighten loose battery and harness plug connection
Low battery outputSulfated or worn out batteries, Loose or defective electrical system ground wireCheck specific gravity of each battery, Check electrolyte level of each battery, Repair or replace
Starter cranks slowlyBatteries too small, Battery cables too small, Crankcase oil too heavyCheck specific gravity of each battery, Replace battery if necessary, Check electrolyte level of each battery, If low, fill cells with distilled water, Fill with oil of appropriate viscosity
Entire electrical system does not functionFaulty connection, Sulfated or worn out batteriesClean and tighten battery and harness plug connections, Check specific gravity and electrolyte level of each battery
Engine hard to start or will not startImproper starting procedure, No fuel, Low battery output, Excessive resistance in starting circuit, Crankcase oil too heavy, Improper type of fuel, Water, dirt or air in fuel system, Clogged primary fuel filter element, Clogged secondary fuel filter element, Dirty or faulty injection nozzlesSee starting section of this manual. Take special note of Bypass Switch operation, Check level of fuel in fuel tank, Check electrolyte level and condition, Clean and tighten all battery connections, Use oil of proper viscosity, Consult fuel supplier and use proper type of fuel for operating condition, Drain, flush, fill and bleed system, Clean or replace filter element, Replace filter element, Have your dealer check injection nozzles
Engine runs irregularly or stalls frequentlyBelow normal engine temperature, Clogged primary fuel filter element, Clogged secondary fuel filter element, Water or dirt in the fuel system, Dirty or faulty injection nozzles, Air in fuel system, Improper type of fuelRemove and check thermostat, Clean or replace filter element, Replace secondary filter element, Drain, flush, fill and bleed system, Have your dealer check injection nozzles, Inspect clamps and hoses on suction side of fuel pump for air leak, Consult fuel supplier and use proper type of fuel for operating condition
Lack of engine powerEngine overloaded, Intake air restriction, Clogged primary fuel filter element, Clogged secondary fuel filter element, Improper type of fuelReduce load, Service air cleaner, Clean or replace filter element, Replace filter element, Consult fuel supplier and use proper type of fuel for operating conditions
Engine overheatsSee 'Engine Overheats' in next category
Below normal engine temperatureImproper valve clearanceReset valves. Best done by dealer
Dirty or faulty injection nozzlesReplace injectors. Best done by dealer
Temperature gauge shows temperature above 205°F (97°C)Shut off the engine immediately. Use the Trouble Shooting Guide on page 21 to isolate the cause of the overheat.
Shutdown is activated and temperature gauge shows within normal rangeCheck the engine crankcase oil level. If low, fill with recommended lubricating oil and restart. Watch the oil pressure gauge carefully and shut off the engine if it does not show a normal reading (20-60 PSI) after a few seconds of operation. If the oil level is normal, DO NOT restart the engine. Call your dealer for assistance.

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

Parts

229
Part #DescriptionQtySystem
025100008Seal Washer / Gasket2Seal PartsGeek
025100010Seal Washer2Seal PartsGeek
025100012Seal Washer - Industrial2Seal PartsGeek
025100016Seal Washer1Seal PartsGeek
050209083Oil Seal1Seal PartsGeek FridayParts $34.59
052100030O-Ring1Seal PartsGeek
052100050O-Ring1Seal PartsGeek
052100070O-Ring1Seal PartsGeek
052100100O-Ring2Seal PartsGeek
052100150O-Ring1Seal PartsGeek
052100400O-Ring1Seal PartsGeek
052109072O-Ring1Seal PartsGeek
052109074Gasket1Gasket PartsGeek
052109076O-Ring2Seal PartsGeek
052300400O-Ring1Seal PartsGeek
052300600O-Ring1Seal PartsGeek
052300700O-Ring1Seal PartsGeek
054109013Gasket1Gasket PartsGeek
080109061Drive Belt (formerly #080109061)1Belt PartsGeek
080109080Drive Belt (formerly #080109080)1Belt PartsGeek
11-13101Gasket / Thermostat Cover Gasket1Gasket PartsGeek
11-28101Gasket / Air Intake Cover Gasket1Gasket PartsGeek
11-38101Gasket / Exhaust Manifold Gasket1Gasket PartsGeek
110996600Gasket1Gasket PartsGeek
111147200Head Gasket (formerly #111147200)1Gasket PartsGeek
111147460Head Gasket; t = 0.5mm1Gasket PartsGeek FridayParts $36.00
111147520Head Gasket; t = 1.4mm1Gasket PartsGeek FridayParts $165.99
120406050Valve Guide Seal - Exhaust4Seal PartsGeek FridayParts $31.49
120406070Valve Guide Seal - Intake4Seal PartsGeek FridayParts $31.49
130306190Fuel Filter Assembly1Fuel filter Amazon eBay $17.02 PartsGeek
130326051Gasket5Gasket PartsGeek
130506140Feed Pump Assembly1Pump PartsGeek FridayParts $33.08
130516069Gasket4Gasket PartsGeek
130516089Gasket1Gasket PartsGeek
130556750Pipe1Hose PartsGeek
130556760Pipe1Hose PartsGeek
130996070Gasket1Gasket PartsGeek
131017600Injection Pump Assembly1Pump PartsGeek
131186110Gasket4Gasket PartsGeek
131226130O-Ring4Seal PartsGeek
131226180O-Ring1Seal PartsGeek
131227240O-Ring8Seal PartsGeek
131296255Gasket2Gasket PartsGeek
131406360Fuel Injector4Injector PartsGeek FridayParts $59.99
131416170Nozzle1Injector PartsGeek FridayParts $75.99
131426160Gasket1Gasket PartsGeek
131426200Gasket4Gasket PartsGeek
131426230Gasket1Gasket PartsGeek
131507450Injection Line #11Hose PartsGeek
131507460Injection Line #21Hose PartsGeek
131507470Injection Line #31Hose PartsGeek
131507480Injection Line #41Hose PartsGeek
131507520Injection Line #11Hose PartsGeek
131507530Injection Line #21Hose PartsGeek
131507540Injection Line #31Hose PartsGeek
131507550Injection Line #41Hose PartsGeek
131606560Return Line1Hose PartsGeek
131606620Return Line1Hose PartsGeek
135597330Intake Hose1Hose PartsGeek
135996480Gasket1Gasket PartsGeek
135996530Gasket1Gasket PartsGeek
135996550Gasket1Gasket PartsGeek
135996600Gasket1Gasket PartsGeek
135996720Gasket1Gasket PartsGeek
140406360Suction Filter1Oil filter PartsGeek
140606701Oil Line1Hose PartsGeek
140606710Drain Hose1Hose PartsGeek
140606720Oil Pipe (844 & 16C)1Hose PartsGeek
140607020Oil Pipe (844L & 20CL)1Hose PartsGeek
145016890Coolant Pump Assembly (earlier)1Pump PartsGeek
145016891Coolant Pump Assembly (formerly #145016890)1Pump PartsGeek
145017350Coolant Pump Assembly1Pump PartsGeek
145206022Thermostat (82° C)1Thermostat PartsGeek FridayParts $14.44
145206180Thermostat 82°1Thermostat PartsGeek FridayParts $56.99
145536050Hose1Hose PartsGeek kuduparts $16.00
145536640Hose, Radiator Outlet1Hose PartsGeek
145536870Hose, Radiator Inlet1Hose PartsGeek
145546510Hose1Hose PartsGeek
145996050Gasket1Gasket PartsGeek
145996360Gasket1Gasket PartsGeek
145996370Gasket1Gasket PartsGeek
145996460Gasket (earlier)1Gasket PartsGeek
145996680Gasket (formerly #145996460)1Gasket PartsGeek
16-13101O-Ring1Seal PartsGeek woodline $4.80
16-15010O-Ring1Seal PartsGeek dieselpartscenter $229.27
16-70001O-ring1Seal PartsGeek
16-90001O-ring1Seal PartsGeek
165996110Gasket1Gasket PartsGeek
165996351Gasket1Gasket PartsGeek FridayParts $35.97
165996361Gasket1Gasket PartsGeek FridayParts $17.98
18-13107Hose1Hose PartsGeek
18-13108Hose 3/4" ID x 18-1/2"1Hose PartsGeek
18-13109Hose 5/16" ID x 25" / Overflow1Hose PartsGeek
18-28101Air Intake Hose (earlier)1Hose PartsGeek
18-28102Air Intake Hose1Hose PartsGeek
18-52007Hose 1/4" ID x 26"2Hose PartsGeek
18-52113Hose Assembly 1/4" ID x 26-1/2"1Hose PartsGeek
18-52205Hose 1/4"ID x 13"1Hose PartsGeek
18-58101Hose Assembly 1/4" ID x 17" (844)1Hose PartsGeek
18-58401Hose Assembly 1/4" ID x 26" (844L)1Hose PartsGeek
185206082Stop Solenoid - 12 Volt (Standard Ground)1Sensor PartsGeek FridayParts $32.25
185206190Stop Solenoid - 12 Volt (Isolated Ground)1Sensor PartsGeek
185206200Stop Solenoid - 24 Volt (Isolated Ground)1Sensor PartsGeek
185246011Oil pressure unit1Sensor PartsGeek FridayParts $11.20
185366060Glow Plug - 12 Volt4Glow plug Amazon eBay $10.99 PartsGeek
185366100Glow Plug - 24 Volt4Glow plug Amazon eBay PartsGeek
185816120Switch Assembly1Sensor PartsGeek
185816240Solenoid Assembly1Sensor PartsGeek
19-00064Hose Clamp #64 (for tank mounting)2Hose PartsGeek
195906940Gasket Set - Industrial1Gasket PartsGeek
198636160Oil Seal1Seal PartsGeek
198636170Oil Seal1Seal PartsGeek FridayParts $34.59
198996060Gasket7Gasket PartsGeek
198996071Gasket4Gasket PartsGeek
22-10003Water Level Switch / Gauge, Isolated Ground1Sensor PartsGeek
22-41016Oil Pressure Sender - Single Station1Sensor PartsGeek
22-41051Toggle Switch2Sensor PartsGeek
22-42055Engine Temperature Sender - Single Station1Sensor PartsGeek
22-71016Oil Pressure Sender - Dual Station1Sensor PartsGeek
22-71026Engine Temperature Sender - Dual Station1Sensor PartsGeek
22-90007Preheat / Shutdown - Bypass Switch1Sensor PartsGeek
22-90008Engine Control Switch1Sensor PartsGeek
24-03100oil filter1Oil filter Amazon eBay $23.45 PartsGeek
24-20001Air filter elementAir filter Amazon eBay $21.00 PartsGeek
24-28101Air Filter Element1Air filter PartsGeek
24-50002Primary Fuel Filter Complete UnitFuel filter Amazon eBay $34.85 PartsGeek
24-50012Primary Fuel Filter ElementFuel filter Amazon eBay $18.95 PartsGeek
24-52020Secondary fuel filter1Fuel filter Amazon eBay $24.71 PartsGeek
25-11216Impeller1Impeller PartsGeek
25-12017Spline Seal1Seal PartsGeek
25-12057Raw Water Pump Assembly1Pump PartsGeek woodline $4.80
25-12060Impeller1Impeller PartsGeek
25-12065Lip Seal1Seal PartsGeek woodline $34.74
25-12066Mechanical Seal1Seal PartsGeek
25-12067O-Ring1Seal PartsGeek
27-13101Tube Assembly1Hose PartsGeek
29-08100Gasket Set - Marine1Gasket PartsGeek
314531057Gasket1Gasket PartsGeek
314531061Gasket1Gasket PartsGeek
314531065Air Filter Element1Air filter PartsGeek
314531125Seal Washer1Seal PartsGeek
314531127Element (marked #314531065)1Air filter Amazon eBay $100.00 PartsGeek
314990030Gasket1Gasket PartsGeek
34-70010Oil Drain Kit Complete (includes all keys)1Oil filter Amazon eBay $547.99 PartsGeek
36-72002Hand Pump1Pump PartsGeek
37-40010Oil Pressure Gauge, 0-80 PSI1Sensor PartsGeek
37-40011Engine Temperature Gauge, 0-250° F1Sensor PartsGeek
37-40012DC Voltmeter, 12 Volt1Sensor PartsGeek
37-40014DC Voltmeter, 24 Volt1Sensor PartsGeek
385720110Engine Temperature Switch 95° C / 203° F1Sensor PartsGeek
385720230PERKINS WATER TEMPERATURE SENSOR1Sensor PartsGeek
40-02003Drive Belt (with 12V/35A alternator)1Belt Amazon eBay PartsGeek
40-02004Drive Belt (with 24V/35A alternator)1Belt PartsGeek
40-02005Drive Belt (with 12V/51A and 24V/35A alternators)1Belt Amazon eBay PartsGeek
40-08401Drive Belt (with 12V/35A alternator)1Belt PartsGeek
40-08403Drive Belt (M-844L & M-20CL)1Belt PartsGeek
40-08404Drive Belt (with 24V/35A alterantor)1Belt PartsGeek
40-08405Drive Belt (with 24V/35A alternator: Bertram spec)1Belt PartsGeek
40-74500Drive Belt (formerly #40-74500)1Belt PartsGeek
GLOW-PLUG-10Glow plug1Glow plug PartsGeek
ONL844W3Starter1Starter PartsGeek
V-BELT-16X1.5V-belt1Belt PartsGeek
00-02003Wear Sleeve; Repair Type**Service part / kit PartsGeek
00-02004Wear Sleeve; Repair Type**Service part / kit PartsGeek
00-71614Grommet 1-5/8"ID x 2-1/4"OD2Service part / kit PartsGeek
00-73146Lifting Eye1Service part / kit PartsGeek
10-12002Tank Assembly1Service part / kit PartsGeek
110666090Filter1Service part / kit PartsGeek
12-00031Capscrew, Hex Head M6 x 1.0 x 25 mm2Service part / kit PartsGeek
12-00712Capscrew, Hex Head M8 x 1.25 x 25 mm2Service part / kit PartsGeek
12-00751Capscrew, Hex Head M8 x 1.25 x 16 mm1Service part / kit PartsGeek
130516084Diaphragm1Service part / kit PartsGeek
135406230Muffler Element1Service part / kit PartsGeek
14-04803Hex Nut, Nylock M6 x 1.02Service part / kit PartsGeek
145306550Cooling Fan1Service part / kit PartsGeek FridayParts $49.99
145506480Heat Exchanger Element (earlier)1Service part / kit PartsGeek
15-00008Flat Washer M62Service part / kit PartsGeek
15-00701Flat Washer M83Service part / kit PartsGeek
15-00702Lock Washer M81Service part / kit PartsGeek
185416300Brush2Service part / kit PartsGeek
185446165Spring2Service part / kit PartsGeek
185446187Regulator Assembly1Service part / kit PartsGeek
185446253Rectifier Assembly1Service part / kit PartsGeek
185846360Brush Holder Assembly1Service part / kit PartsGeek
185846361Spring Brush / Brush Spring4Service part / kit PartsGeek
20-18101Heat Exchanger Element (formerly #145506480)1Service part / kit PartsGeek
21-00010Bushing, Steel 3/8NPT x 1/4NPT1Service part / kit PartsGeek
21-00135Bushing, Brass 1/2NPT x 1/4NPT1Service part / kit PartsGeek
21-00701Flat Washer M81Service part / kit PartsGeek
21-05404Male Elbow, 45° Steel 1/4NPT x 1/4-37T1Service part / kit PartsGeek
21-12007Filler Cap (7 PSI)1Service part / kit PartsGeek
21-12008Filler Cap1Service part / kit PartsGeek
21-51093Male Connector, Brass 1/2 NPT x 1/2 HB1Service part / kit PartsGeek
21-52245Male Elbow, Brass 1/4 NPT x 5/16-45T2Service part / kit PartsGeek
21-65005Bushing, Steel 1" NPT x 3/8 NPT1Service part / kit PartsGeek
21-70007Female Swivel, Brass 5/16 HB x 5/16-37T1Service part / kit PartsGeek
21-71042Female Swivel, Brass 1/2 HB x 1/2-45T1Service part / kit PartsGeek
21-71049Male Elbow, 90° Steel 1/4NPT x 1/4-37T1Service part / kit PartsGeek
21-71056Female Swivel, Brass 5/16 HB x 5/16-45T3Service part / kit PartsGeek
21-71093Male Connector, Brass 3/8 NPT x 1/2 HB1Service part / kit PartsGeek
22-40004Resistor Kit2Service part / kit PartsGeek
22-40012Resistor 200 Ohm1Service part / kit PartsGeek
22-40018Circuit Breaker 10 Amp1Service part / kit PartsGeek
22-40334D.C. Voltage Regulator, 12V, Adjustable1Service part / kit PartsGeek
22-41060Diode, 6 Amp 50 Volt / 1000 PIV2Service part / kit PartsGeek
22-42043Circuit Breaker, DC 15 Amp1Service part / kit PartsGeek
22-42047Relay, 12 Volt SPDT4Service part / kit PartsGeek
22-4485212 Volt Bulb**Service part / kit PartsGeek
22-4485324 Volt Bulb**Service part / kit PartsGeek
22-70048Diode Harness Addition1Service part / kit PartsGeek
22-90009Hour Meter1Service part / kit PartsGeek
23-73106Bracket1Service part / kit PartsGeek
23-75404Bracket, Tank Mtg.2Service part / kit PartsGeek
25-12004Repair Kit1Service part / kit PartsGeek
25-12061Cam1Service part / kit PartsGeek
25-12062Wear Plate1Service part / kit PartsGeek
25-12064Bearing1Service part / kit PartsGeek
28-41060Diode1Service part / kit PartsGeek
31-12001Port Adapter (requires #11)1Service part / kit PartsGeek
31-70001Adapter, Oil Drain1Service part / kit PartsGeek
31-80002Female Swivel, 1/4HB x 1/4-37T2Service part / kit PartsGeek
310110010Radiator Cap1Service part / kit PartsGeek
33-82205Platform Mount4Service part / kit PartsGeek
33-82206Platform Mount2Service part / kit PartsGeek dieselpartscenter $148.64
33-82254Mount4Service part / kit PartsGeek dieselpartscenter $68.16
33-83106Platform Mount2Service part / kit PartsGeek
36-72003Drain Valve1Service part / kit PartsGeek
36-72005Male Elbow, Brass 1/4 NPT x 5/16-45T2Service part / kit PartsGeek
37-40013Hourmeter1Service part / kit PartsGeek

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
Prime5.9
Prime0%3.2
Prime0%4.9

Available documents

Spec sheet — NL844LK (Northern Lights)Operator's manual — ONL844W2 (Northern Lights)Operator's manual — ONL844W3 (Northern Lights)Parts manual — P844-2-I (Northern Lights)Parts manual — p844k-i (Northern Lights)

Other sets with this engine

Northern Lights M20CNorthern Lights M844L