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Kubota SDG13LX-581 Generator Set

The Kubota SDG13LX-581 is a 22 kW Diesel standby generator set powered by a Kubota D1503-K3A engine. It is available at 400 V and 440 V, 3-phase, 50 Hz and rated 28.9 A. It holds about 6.5 L (1.7 gal) of oil and 6.5 L (1.7 gal) of coolant. Starting uses 1 group-85 battery at 12 V. The set measures 1390×650×1160 mm (54.7×25.6×45.7 in), weighs about 580 kg (1279 lb) and produces 84 dBA at 7 m. An integrated tank holds 100 L (26.4 gal). The same D1503-K3A engine also powers generator sets from Airman.

22 kW
Standby
1.499 L
Displacement
6.5 L
Oil capacity
0
Document types

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Typical fuel consumption for 20–25 kW Diesel generators →

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Service parts for the SDG13LX-581

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

Oil system

1 required

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

Specifications

FuelDiesel
Frequency50.0 Hz
Standby power22 kW
Prime power20 kW
EmissionsJPN Stage 3
Oil capacity6.5 L
AlternatorV2403-K3A (4-pole, Class Not specified insulation)
Voltage options400 V, 440 V
Phase3
Rated current28.9 A
Power factor0.8
Battery group85D26Rx1
Battery voltage12 V
Battery quantity1
Coolant capacity6.5 L
Dimensions (L×W×H)1390×650×1160 mm
Dry weight580 kg
Sound level84.0 dBA @ 7 m
Fuel tank100.0 L

Engine

Kubota D1503-K3A
Oil capacity6.5 L
Coolant capacity5.7 L
Displacement1.499 L
AspirationSwirl chamber
Rated speed1500 rpm

Filters for the Kubota D1503-K3A

2

Engine-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.

SystemFilterDescriptionCross-references
Oil filterP550939Lube Filter, Spin-On Full FlowKUBOTA 1641432430, KUBOTA 16432430, NAPA 1521, NAPA 21521 FridayParts $23.20

Listed for this engine in only one kind of machine, so they may depend on how the engine was installed:

SystemFilterDescriptionCross-references
Fuel filterP502161Fuel Filter, CartridgeKUBOTA 1522143160, KUBOTA 15221431600, NAPA 3507, BALDWIN PF717 KuduParts $11.00 FridayParts $13.62

Same engine, other brands

1 brand

The Kubota D1503-K3A in this set also powers 1 generator set sold under 1 other brand. Service parts and maintenance intervals for the engine are shared; enclosure, alternator, controller and ratings are not.

BrandModels
AirmanSDG13LX-5B1N

Maintenance & consumables

for the Kubota D1503-K3A
ItemSpecCapacityPart #Interval
Air filterAir Element—1000 hr
Fuel filterFuel Filter—500 hr
Oil filter95D31Rx187415600500 hr Amazon eBay $14.99 PartsGeek $8.98 NAPA $9.09 KuduParts $18.00
BatteryBattery—2000 hr
Belt95D31Rx1—
OilEngine Oil6.5 L—250 hr
Spark plug95D31Rx1—

Compatible filters for the Kubota D1503-K3A — cross-referenced via Donaldson. Options to verify against your serial number, not confirmed for this exact unit.

  • Air filter: Kubota RG64842831 Kubota R141142289 Donaldson P821575 Donaldson P822858 Wix 46438NP
  • Fuel filter: Kubota 607 Donaldson P502161 Wix 33507 Baldwin PF717

Common questions

What is the power rating of the Kubota SDG13LX-581?

The Kubota SDG13LX-581 is rated 22 kW standby.

What engine does the Kubota SDG13LX-581 use?

The Kubota SDG13LX-581 is powered by the Kubota D1503-K3A engine.

Is the Kubota SDG13LX-581 diesel or gas?

The Kubota SDG13LX-581 runs on Diesel.

How much oil does the Kubota SDG13LX-581 take?

The Kubota D1503-K3A engine in the Kubota SDG13LX-581 has an oil capacity of 6.5 liters.

How much coolant does the Kubota SDG13LX-581 hold?

The Kubota SDG13LX-581 cooling system holds 6.5 liters (1.7 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.

What is the prime power rating of the Kubota SDG13LX-581?

The Kubota SDG13LX-581 is rated 20 kW prime, against 22 kW standby.

How loud is the Kubota SDG13LX-581?

The Kubota SDG13LX-581 is rated at 84.0 dBA at 7 m, per the manufacturer specification sheet.

What is the dry weight of the Kubota SDG13LX-581?

The Kubota SDG13LX-581 has a dry weight of 580 kg (1278 lb).

What size fuel tank does the Kubota SDG13LX-581 have?

The Kubota SDG13LX-581 has a 100 liter (26 US gallon) fuel tank.

What voltage does the Kubota SDG13LX-581 produce?

The Kubota SDG13LX-581 is offered in 400 V, 440 V, 3-phase.

What battery does the Kubota SDG13LX-581 use?

The Kubota SDG13LX-581 uses 1 battery, 12 V each, group 85D26Rx1, per the manufacturer specification sheet.

What alternator comes on the Kubota SDG13LX-581?

The Kubota SDG13LX-581 uses a V2403-K3A alternator. It has 4 poles. Insulation class Not specified.

What oil filter fits the Kubota SDG13LX-581?

The Kubota SDG13LX-581 uses oil filter part number 87415600.

What fuel filter does the Kubota SDG13LX-581 use?

The Kubota SDG13LX-581 uses fuel filter part numbers KUBOTA 607, Donaldson P502161.

Which air filter part number does the Kubota SDG13LX-581 take?

The Kubota SDG13LX-581 uses air filter part numbers KUBOTA RG64842831, KUBOTA R141142289.

Parts

3
Part #DescriptionQtySystem
80D26Rx1Air Element1Air filter Amazon eBay
1509001JQA-05811Service part / kit Amazon eBay
JQA-EM4670ISO140011Service part / kit Amazon eBay

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
Prime50%3.17.9
Prime75%4.211.0
Standby50%2.66.6
Standby75%2.66.6

Available documents

Full service, cheapest listings

Priced items from this model's own parts manual.

Oil filter 87415600$8.98
1 priced item$8.98