Service parts for the L20
Grouped by system, with how many of each the parts manual calls for.
Air intake
1 requiredFuel system
1 requiredOil system
1 requiredBelts
1 requiredHydraulic system
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
| Fuel | Diesel |
|---|---|
| Standby power | 20 kW |
| Prime power | 20 kW |
| Emissions | Tier 4 Interim (T4i) |
| Oil capacity | 8.1 L |
| Voltage options | 120 V, 230 V, 240 V |
| Phase | Single phase |
| Battery cranking | 600 CCA |
| Battery voltage | 12 V V |
| Battery quantity | 5 |
| Tank runtime | 52 hr |
Engine
| Oil capacity | 8.1 L |
|---|---|
| Coolant capacity | 2.8 L |
| Displacement | 2.179 L |
| Aspiration | NA |
| Rated speed | 2300 rpm |
Filters for the Isuzu 4LE2
3Engine-mounted filters the filter manufacturers list for this engine family. These come from the engine, not from this generator set’s own parts list, so confirm against your serial number before ordering.
Listed for this engine in only one kind of machine, so they may depend on how the engine was installed:
| System | Filter | Description | Cross-references | |
|---|---|---|---|---|
| Oil filter | P550162 | Lube Filter, Spin-On Full Flow | ISUZU 2944566410, ISUZU 5860001790, NAPA 1301, NAPA 1334 | FridayParts $10.50 |
| Fuel filter | P502166 | Fuel Filter, Cartridge | ISUZU 8944015310, ISUZU 8970713480, NAPA 3263, BALDWIN PF981 | KuduParts $11.00 |
| Fuel filter | P550057 | Fuel Filter, Spin-On | ISUZU 1132400090, ISUZU 130366120, NAPA 3386, WALGAHN-MOTORENTECHN 00811389 | KuduParts $12.00 FridayParts $34.80 |
Same engine, other brands
1 brandThe Isuzu 4LE2 in this set also powers 2 generator sets sold under 1 other brand. Service parts and maintenance intervals for the engine are shared; enclosure, alternator, controller and ratings are not.
| Brand | Models |
|---|---|
| Isuzu | 4LE2, IDE-6450A |
Maintenance & consumables
for the Isuzu 4LE2| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | 8972319000 | Amazon eBay $95.00 NAPA $51.65 | |||
| Fuel filter | element replacement | 8981527372 | 500 hr | Amazon eBay $30.00 PartsGeek $14.97 NAPA $58.82 | |
| Oil filter | X13201002 | 500 hr | Amazon eBay $23.95 PartsGeek $11.97 NAPA $14.63 | ||
| Battery | — | 1000 hr | |||
| Belt | BELT | 45.60002.01 | buy | ||
| Coolant | 2.8 | — | 750 hr | ||
| Coolant filter | — | 1000 hr | |||
| Hydraulic filter | 89761822820 | Amazon eBay $15.19 PartsGeek $16.97 | |||
| Oil | 8.7 | — | 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 8.1 liters.
How much coolant does the Doosan L20 hold?
The Doosan L20 cooling system holds 2.8 liters (0.7 US gallons) for the engine, per the manufacturer specification sheet.
What voltages is the Doosan L20 available in?
The Doosan L20 is offered in 120 V, 230 V, 240 V, Single phase-phase.
How many cold cranking amps does the Doosan L20 require?
The Doosan L20 uses 5 batteryies, 12 V V each, 600 CCA, per the manufacturer specification sheet.
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
93| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 08.00316.01 | GASKET MET. BUNA | 1 | Gasket | buy |
| 10.07073.00 | SENSOR | 1 | Sensor | buy |
| 20.03070.00 | FOOT BRAKING PUMP D15.8X38 OIL MIN. | 1 | Pump | buy |
| 20.03270.00 | HYDR. PUMP | 1 | Pump | buy |
| 20.03281.00 | HYDR. PUMP SAUER | 1 | Pump | buy |
| 20.09032.00 | HOSE KIT 3.7M | 1 | Hose | buy |
| 20.09041.00 | HOSE KIT 4.5M | 1 | Hose | buy |
| 20.10219.02 | HYDRAULIC HOSE 491 1/4 850 C90-TL M16 | 1 | Hose | buy |
| 20.10234.01 | HYDRAULIC HOSE 491 5/8 1350 TL-C90 M26 | 1 | Hose | buy |
| 20.10281.00 | HYDRAULIC HOSE 371 3/4 760 C90 SAE6000 | 1 | Hose | buy |
| 20.10282.00 | HYDRAULIC HOSE 371 3/4 800 C90 SAE 6000 | 1 | Hose | buy |
| 201.05153.50 | O-RING DIN3770 | 1 | Seal | buy |
| 201.10025.50 | O-RING DIN3770 | 1 | Seal | buy |
| 201.25435.50 | GASKET | 1 | Gasket | buy |
| 205.45010.50 | SEAL DIN3760 | 1 | Seal | buy |
| 205.50010.50 | SEAL DIN3760 | 1 | Seal | buy |
| 28.00341.00 | METALLIC GASKET BUNA D1/4 | 2 | Gasket | buy |
| 43.01210.00 | AIR FILTER | 1 | Air filter | buy |
| 43.14105.37 | TUBO GOMA B/P 8x14x340 (CH 250) | 1 | Hose | buy |
| 43.14105.45 | TUBO GOMA B/P 8x14x550 | 2 | Hose | buy |
| 43.61522.00 | HYDR. PUMP | 1 | Pump | buy |
| 45.01526.00 | PREFILTER FUEL/HYDRAULIC | 1 | Fuel filter | buy |
| 45.60002.01 | BELT | 1 | Belt | buy |
| 469.03014.00 | HOSE L/P MAT. 8x14 | 1 | Hose | buy |
| 4LE2X | 新規部品 4LE2X | Crankshaft | Amazon eBay $225.00 FridayParts $49.54 | |
| 5-8840-2675-0 | Compression gauge | Compression gauge | Amazon eBay | |
| 5-8840-9015-0 | Oil filter wrench (JKM-9004) | Oil filter | eBay | |
| 5-8840-9016-0 | Nozzle tester (J-28829) | Injector | eBay | |
| 5-8840-9031-0 | Front oil seal installer | Seal | eBay | |
| 5-8840-9032-0 | Rear oil seal installer | Seal | eBay | |
| 5-8840-9033-0 | Valve stem seal installer | Seal | eBay | |
| 57.05010.00 | BRAKE PUMP | 1 | Pump | buy |
| 57.10314.00 | HYDRAULIC HOSE R1T1/4 1010 TL-C90 TL | 1 | Hose | buy |
| 57.10315.00 | HYDRAULIC HOSE R1T1/4 760 TL - C90 TL | 1 | Hose | buy |
| 60.20100.00 | FILTER ELEMENT (hydraulic oil filter) | 1 | Hydraulic filter | buy |
| 60.20101.00 | COMPLETE OIL FILTER (hydraulic) | 1 | Hydraulic filter | buy |
| 86.70000.04 | OIL FILTER | 1 | Oil filter | buy |
| 86.70000.35 | DRAIN PLUG GASKET | 1 | Gasket | buy |
| EL.10066.00 | GASKET SET | 1 | Gasket | buy |
| EL.30030.00 | SEAL DIN6505 | 1 | Seal | buy |
| EL.30051.00 | HOSE R1T1/4 2,6 M | 1 | Hose | buy |
| EL.30052.00 | HOSE R1T1/4 3,3 M | 1 | Hose | buy |
| EL.30053.00 | HOSE R1T1/4 H3.6M | 1 | Hose | buy |
| EL.30054.00 | HOSE R1T1/4 H 4.5M | 1 | Hose | buy |
| EL.30077.00 | CENTRAL CYLINDER GASKET KIT | 1 | Gasket | buy |
| EL.30103.00 | HOSE R1T3/8H 3.7M | 1 | Hose | buy |
| EL.30104.00 | HOSE R1T3/8 5.4M | 1 | Hose | buy |
| EL.30107.00 | HOSE R1T1/4 3.7M | 1 | Hose | buy |
| EL.30108.00 | HOSE R1T1/4 5.4M | 1 | Hose | buy |
| EL.30111.00 | RIGHT METALLIC HOSE D12 | 1 | Hose | buy |
| EL.30128.00 | HOSE R1T1/4 4.3M | 1 | Hose | buy |
| IZ.10001.00 | GENERATOR (charging alternator) | 1 | Alternator | buy |
| IZ.10002.00 | STARTER ASSY | 1 | Starter | buy |
| IZ.10003.00 | CALENTADOR (glow plug / heater) | 4 | Glow plug | buy |
| IZ.10004.00 | OIL FILTER (Isuzu 4LE2) | 1 | Oil filter | buy |
| IZ.10009.00 | MONOCONTACTO ACEITE (oil pressure switch) | 1 | Sensor | buy |
| IZ.10020.00 | HEAD TO COVER GASKET | 1 | Gasket | buy |
| IZ5096230020 | GUIDE TUBE GASKET | 1 | Gasket | Amazon eBay |
| IZ5878143120 | ENGINE GASKET KIT | 1 | Gasket | Amazon eBay |
| IZ8941236231 | OIL FILLER GASKET | 1 | Gasket | Amazon eBay |
| MA.10034.00 | HOSE TRANS. PLAS | 1 | Hose | buy |
| MA.10051.00 | RUBBER GASKET | 1 | Gasket | buy |
| MA.10052.00 | RUBBER GASKET | 1 | Gasket | buy |
| MA.10053.00 | RUBBER GASKET | 1 | Gasket | buy |
| MA.20041.00 | AIR FILTER | 1 | Air filter | buy |
| MN000029 | FUEL FILTER GASOIL | 1 | Fuel filter | Amazon eBay |
| MN000031 | AIR FILTER ELEMENT | 1 | Air filter | Amazon eBay |
| RQN9700/203 | GASKET SET | 1 | Gasket | buy |
| ZF0634303266 | O-RING | 1 | Seal | Amazon eBay |
| ZF0634303980 | O-RING | 1 | Seal | Amazon eBay |
| ZF0634304402 | GASKET | 1 | Gasket | Amazon eBay |
| ZF0634313214 | GASKET | 1 | Gasket | Amazon eBay |
| ZF0734309346 | SEAL | 1 | Seal | Amazon eBay |
| ZF0734309421 | SEAL | 1 | Seal | Amazon eBay |
| ZF0734309427 | SHAFT SEAL | 1 | Seal | Amazon eBay |
| ZF0734317180 | GASKET | 1 | Gasket | Amazon eBay |
| ZF0734319642 | SEAL | 1 | Seal | Amazon eBay |
| ZF4472359102 | SEALING CAP | 1 | Seal | Amazon eBay |
| 1-85221-029-0 | Piston ring pliers | Service part / kit | eBay | |
| 20.02051.01 | RADIATOR | 1 | Service part / kit | buy |
| 43.01214.00 | FILTER ELEMENT 60X80X318 A | 1 | Service part / kit | buy |
| 43.70406.00 | AD. FILTER SUPPORT | 1 | Service part / kit | buy |
| 46.00171.01 | EXPANSION TANK | 1 | Service part / kit | buy |
| 5-8840-0266-0 | Bolt angle gauge - special tool for tightening bolts by the angle method | Service part / kit | eBay | |
| 5-8840-9018-0 | Piston ring compressor (J-8037) | Service part / kit | eBay | |
| 5-8840-9029-0 | Compression gauge adapter | Service part / kit | Amazon eBay | |
| 5-8840-9030-0 | Valve spring compressor | Service part / kit | eBay | |
| 5-8840-9034-0 | Camshaft bearing installer | Service part / kit | eBay | |
| 5-8840-9035-0 | Valve guide installer | Service part / kit | eBay | |
| IDE-6450A | Isuzu Genuine Parts | Service part / kit | Amazon eBay | |
| IZ.10006.00 | SOLENOID | 1 | Service part / kit | buy |
| IZ.10021.00 | OIL PAN ASSY | 1 | Service part / kit | buy |
| KF.20400RE00 | C 200 H x2/x4 FILTERS KIT | 1 | Service 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
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.