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Home›Doosan›Doosan L20

Doosan L20 Generator Set

The Doosan L20 is a 20 kW (60 kVA) Diesel standby generator set powered by a Isuzu 4LE2 engine. It is available at 120 V and 230 V, single-phase. It holds about 8.6 L (2.3 gal) of oil and 2.8 L (0.7 gal) of coolant. Starting uses 5 batteries rated 600 CCA at 12 V. The same 4LE2 engine also powers generator sets from Isuzu.

20 kW
Standby
2.179 L
Displacement
8.6 L
Oil capacity
1
Document types

How to read your Doosan serial & model number →

Typical fuel consumption for 20–25 kW Diesel generators →

Compare with other 20–25 kW Diesel generators →

On this pageService partsSpecsEngineMaintenanceDocumentsFAQ

Service parts for the L20

Grouped by system, with how many of each the parts manual calls for.

Air intake

1 required
8972319000Air filter$95.00eBay

Fuel system

1 required
8981527372Fuel filter$14.97PartsGeek

Oil system

1 required
X13201002Oil filter$11.97PartsGeek

Belts

1 required
45.60002.01Beltfind

Hydraulic system

1 required
89761822820Hydraulic filter$16.97PartsGeek

Prices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.

Specifications

FuelDiesel
Standby power20 kW
Prime power20 kW
EmissionsTier 4 Interim (T4i)
Oil capacity8.6 L
Voltage options120 V, 230 V, 240 V
PhaseSingle phase
Battery cranking600 CCA
Battery voltage12 V V
Battery quantity5
Tank runtime52 hr

Engine

Isuzu 4LE2
Oil capacity8.6 L
Coolant capacity2.8 L
Displacement2.179 L
AspirationWater-Cooled, four cycle, in-line overhead valve type
Rated speed2300 rpm

Maintenance & consumables

for the Isuzu 4LE2
ItemSpecCapacityPart #Interval
Air filter8972319000 Amazon eBay $95.00
Fuel filterelement replacement8981527372500 hr Amazon eBay $30.00 PartsGeek $14.97
Oil filterX13201002500 hr Amazon eBay $23.95 PartsGeek $11.97
Battery—1000 hr
BeltBELT45.60002.01 buy
Coolant2.8—750 hr
Coolant filter—1000 hr
Hydraulic filter89761822820 Amazon eBay PartsGeek $16.97
Oil—250 hr
Spark plug—1500 hr

Common questions

What size generator is the Doosan L20?

The Doosan L20 is rated 20 kW standby.

What engine is in the Doosan L20?

The Doosan L20 is powered by the Isuzu 4LE2 engine.

What kind of fuel does the Doosan L20 run on?

The Doosan L20 runs on Diesel.

How much oil does the Doosan L20 take?

The Isuzu 4LE2 engine in the Doosan L20 has an oil capacity of 8.6 liters.

What oil filter fits the Doosan L20?

The Doosan L20 uses oil filter part number X13201002.

What fuel filter does the Doosan L20 use?

The Doosan L20 uses fuel filter part number 8981527372.

What air filter fits the Doosan L20?

The Doosan L20 uses air filter part number 8972319000.

Parts

82
Part #DescriptionQtySystem
08.00316.01GASKET MET. BUNA1Gasket buy
10.07073.00SENSOR1Sensor buy
20.03070.00FOOT BRAKING PUMP D15.8X38 OIL MIN.1Pump buy
20.03270.00HYDR. PUMP1Pump buy
20.03281.00HYDR. PUMP SAUER1Pump buy
20.09032.00HOSE KIT 3.7M1Hose buy
20.09041.00HOSE KIT 4.5M1Hose buy
20.10219.02HYDRAULIC HOSE 491 1/4 850 C90-TL M161Hose buy
20.10234.01HYDRAULIC HOSE 491 5/8 1350 TL-C90 M261Hose buy
20.10281.00HYDRAULIC HOSE 371 3/4 760 C90 SAE60001Hose buy
20.10282.00HYDRAULIC HOSE 371 3/4 800 C90 SAE 60001Hose buy
201.05153.50O-RING DIN37701Seal buy
201.10025.50O-RING DIN37701Seal buy
201.25435.50GASKET1Gasket buy
205.45010.50SEAL DIN37601Seal buy
205.50010.50SEAL DIN37601Seal buy
28.00341.00METALLIC GASKET BUNA D1/42Gasket buy
43.01210.00AIR FILTER1Air filter buy
43.14105.37TUBO GOMA B/P 8x14x340 (CH 250)1Hose buy
43.14105.45TUBO GOMA B/P 8x14x5502Hose buy
43.61522.00HYDR. PUMP1Pump buy
45.01526.00PREFILTER FUEL/HYDRAULIC1Fuel filter buy
45.60002.01BELT1Belt buy
469.03014.00HOSE L/P MAT. 8x141Hose buy
4LE2X新規部品 4LE2XCrankshaft Amazon eBay $225.00 FridayParts $49.54
5-8840-2675-0Compression gauge1Compression gauge Amazon eBay
5-8840-9029-0Compression Gauge Adapter1Compression gauge adapter Amazon eBay
57.05010.00BRAKE PUMP1Pump buy
57.10314.00HYDRAULIC HOSE R1T1/4 1010 TL-C90 TL1Hose buy
57.10315.00HYDRAULIC HOSE R1T1/4 760 TL - C90 TL1Hose buy
60.20100.00FILTER ELEMENT (hydraulic oil filter)1Hydraulic filter buy
60.20101.00COMPLETE OIL FILTER (hydraulic)1Hydraulic filter buy
86.70000.04OIL FILTER1Oil filter buy
86.70000.35DRAIN PLUG GASKET1Gasket buy
EL.10066.00GASKET SET1Gasket buy
EL.30030.00SEAL DIN65051Seal buy
EL.30051.00HOSE R1T1/4 2,6 M1Hose buy
EL.30052.00HOSE R1T1/4 3,3 M1Hose buy
EL.30053.00HOSE R1T1/4 H3.6M1Hose buy
EL.30054.00HOSE R1T1/4 H 4.5M1Hose buy
EL.30077.00CENTRAL CYLINDER GASKET KIT1Gasket buy
EL.30103.00HOSE R1T3/8H 3.7M1Hose buy
EL.30104.00HOSE R1T3/8 5.4M1Hose buy
EL.30107.00HOSE R1T1/4 3.7M1Hose buy
EL.30108.00HOSE R1T1/4 5.4M1Hose buy
EL.30111.00RIGHT METALLIC HOSE D121Hose buy
EL.30128.00HOSE R1T1/4 4.3M1Hose buy
IZ.10001.00GENERATOR (charging alternator)1Alternator buy
IZ.10002.00STARTER ASSY1Starter buy
IZ.10003.00CALENTADOR (glow plug / heater)4Glow plug buy
IZ.10004.00OIL FILTER (Isuzu 4LE2)1Oil filter buy
IZ.10009.00MONOCONTACTO ACEITE (oil pressure switch)1Sensor buy
IZ.10020.00HEAD TO COVER GASKET1Gasket buy
IZ5096230020GUIDE TUBE GASKET1Gasket Amazon
IZ5878143120ENGINE GASKET KIT1Gasket Amazon
IZ8941236231OIL FILLER GASKET1Gasket Amazon
MA.10034.00HOSE TRANS. PLAS1Hose buy
MA.10051.00RUBBER GASKET1Gasket buy
MA.10052.00RUBBER GASKET1Gasket buy
MA.10053.00RUBBER GASKET1Gasket buy
MA.20041.00AIR FILTER1Air filter buy
MN000029FUEL FILTER GASOIL1Fuel filter Amazon eBay
MN000031AIR FILTER ELEMENT1Air filter Amazon eBay
RQN9700/203GASKET SET1Gasket buy
ZF0634303266O-RING1Seal Amazon
ZF0634303980O-RING1Seal Amazon
ZF0634304402GASKET1Gasket Amazon
ZF0634313214GASKET1Gasket Amazon
ZF0734309346SEAL1Seal Amazon
ZF0734309421SEAL1Seal Amazon
ZF0734309427SHAFT SEAL1Seal Amazon
ZF0734317180GASKET1Gasket Amazon
ZF0734319642SEAL1Seal Amazon
ZF4472359102SEALING CAP1Seal Amazon
20.02051.01RADIATOR1Service part / kit buy
43.01214.00FILTER ELEMENT 60X80X318 A1Service part / kit buy
43.70406.00AD. FILTER SUPPORT1Service part / kit buy
46.00171.01EXPANSION TANK1Service part / kit buy
IDE-6450AIsuzu Genuine PartsService part / kit Amazon eBay
IZ.10006.00SOLENOID1Service part / kit buy
IZ.10021.00OIL PAN ASSY1Service part / kit buy
KF.20400RE00C 200 H x2/x4 FILTERS KIT1Service part / kit buy

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.

Available documents

Spec sheet — light-towers-portfolio (Doosan)
Full service, cheapest listings

Priced items from this model's own parts manual.

Air filter 8972319000$95.00
Fuel filter 8981527372$14.97
Oil filter X13201002$11.97
Hydraulic filter 89761822820$16.97
4 priced items$138.91
Other sets with this engine
Isuzu 4LE2