HomeSDMOSDMO J20U

SDMO J20U Generator Set

The SDMO J20U is a 20 kW (20 kVA) diesel standby generator set powered by a John Deere 3029DFS29 engine. It is available at 240 V, single-phase, 60 Hz and rated 83 A. It holds about 6 L (1.6 gal) of oil and 16.1 L (4.3 gal) of coolant, with a maximum ambient rating of 50 °C. The set measures 1700×896×1221 mm (66.9×35.3×48.1 in), weighs about 750 kg (1653 lb) and produces 78 dBA at 1 m. An integrated tank holds 100 L (26.4 gal). The same 3029DFS29 engine also powers generator sets from John Deere.

20 kW
Standby
2.91 L
Displacement
6.0 L
Oil capacity
1
Document types

How to read your SDMO serial & model number →

Typical fuel consumption for 20–25 kW Diesel generators →

Compare with other 20–25 kW Diesel generators →

Specifications

Fueldiesel
Frequency60.0 Hz
Standby power20 kW
Standby kVA20
Prime power18 kW
ControllerAPM303
Oil capacity6.0 L
AlternatorAT00630T (4-pole, Class H insulation)
Voltage options240 V
Phase1
Rated current83 A
Power factor1
Coolant capacity16.1 L
Max ambient50 °C
Dimensions (L×W×H)1700×896×1221 mm
Dry weight750 kg
Sound level78.0 dBA @ 1 m
Fuel tank100.0 L

Engine

John Deere 3029DFS29
Oil capacity6.0 L
Coolant capacity16.1 L
Displacement2.91 L
AspirationAthmo
Rated speed1800 rpm

Same engine, other brands

1 brand

The John Deere 3029DFS29 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
John DeereJ20U

Maintenance & consumables

for the John Deere 3029DFS29
ItemSpecCapacityPart #Interval
Air filter
Fuel filter
Oil filter
Battery
Belt
Coolant16.1 L
Oil6.0 L
Spark plug

Compatible filters for the John Deere 3029DFS29 — cross-referenced via Donaldson. Options to verify against your serial number, not confirmed for this exact unit.

  • Air filter: John Deere AP3330 John Deere AE27170 John Deere AT18426 John Deere AM129028 John Deere KV16429
  • Fuel filter: John Deere AE29052 John Deere AR50041 John Deere R127970 John Deere RE62418 Donaldson P550012
  • Oil filter: John Deere DZ112582 John Deere AR58956 Donaldson P550758 Donaldson P550020 Wix 57076

Common questions

How many kW is the SDMO J20U?

The SDMO J20U is rated 20 kW standby (20.0 kVA).

Which engine powers the SDMO J20U?

The SDMO J20U is powered by the John Deere 3029DFS29 engine.

What fuel does the SDMO J20U use?

The SDMO J20U runs on diesel.

What is the oil capacity of the SDMO J20U?

The John Deere 3029DFS29 engine in the SDMO J20U has an oil capacity of 6.0 liters.

What is the coolant capacity of the SDMO J20U?

The SDMO J20U cooling system holds 16.1 liters (4.3 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.

What is the prime power rating of the SDMO J20U?

The SDMO J20U is rated 18 kW prime (18 kVA), against 20 kW standby.

How loud is the SDMO J20U?

The SDMO J20U is rated at 78.0 dBA at 1 m, per the manufacturer specification sheet.

What is the dry weight of the SDMO J20U?

The SDMO J20U has a dry weight of 750 kg (1653 lb).

What size fuel tank does the SDMO J20U have?

The SDMO J20U has a 100 liter (26 US gallon) fuel tank.

What voltages is the SDMO J20U available in?

The SDMO J20U is offered in 240 V, 1-phase.

What alternator does the SDMO J20U use?

The SDMO J20U uses a AT00630T alternator. It has 4 poles. Insulation class H.

What oil filter fits the SDMO J20U?

The SDMO J20U uses oil filter part numbers JOHN DEERE DZ112582, JOHN DEERE AR58956.

What fuel filter does the SDMO J20U use?

The SDMO J20U uses fuel filter part numbers JOHN DEERE AE29052, JOHN DEERE AR50041.

What air filter does the SDMO J20U use?

The SDMO J20U uses air filter part numbers JOHN DEERE AP3330, JOHN DEERE AE27170.

Parts

7
Part #DescriptionQtySystem
09912-34510Special tool (A)Special tool Amazon eBay
09913-60910Special tool (B)Special tool Amazon eBay
09913-61510Special tool (A) for main shaft hub removalSpecial tool Amazon eBay
09913-84510Special tool (A) for input shaft oil seal retainerSpecial tool Amazon eBay
09922-85811Special tool (A) for upper case and shifter assembly removalSpecial tool Amazon eBay
99000-25010Grease A1Fluid Amazon eBay
99000-32020Thread lock cementService 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
Standby50%4.41.16
Standby75%6.51.72
Standby100%8.02.11
Standby110%9.02.38

Available documents

Spec sheet — 20-KW-JOHN-DEERE-GENERATOR-J20UM-II (SDMO)Spec sheet — J20UM

This page was generated from the 2 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.

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