HomeGeneracGenerac SD400

Generac SD400 Generator Set

The Generac SD400 is a 400 kW (400 kVA) Diesel standby generator set powered by a Generac 1600TA engine. It is available at 120/208 V, 120/240 V, 277/480 V and 346/600 V, 3-phase and 60 Hz. It holds about 36 L (9.5 gal) of oil and 64.5 L (17.0 gal) of coolant, with a maximum ambient rating of 50 °C. Starting uses 2 group-8 batteries rated 1155 CCA at 24 V. The set measures 3455×1463×1701.1 mm (136.0×57.6×67.0 in) and weighs about 2948.35 kg (6500 lb).

400 kW
Standby
16.0 L
Displacement
36.0 L
Oil capacity
3
Document types

How to read your Generac serial & model number →

Specifications

FuelDiesel
Frequency60.0 Hz
Standby power400 kW
Standby kVA400
Prime power300 kW
EmissionsTier III
ControllerPowerManager Digital Platform, PowerManager Digital Platform (PM-DCP)
Oil capacity36.0 L
Alternator520 (4-pole, Class H insulation)
Voltage options120/208 V, 120/240 V, 277/480 V, 600 V
Phase3-phase
Power factor0.8
Battery group8D
Battery cranking1155 CCA
Battery voltage24V V
Battery quantity2
Coolant capacity64.5 L
Max ambient50 °C
Dimensions (L×W×H)3455×1463×1701 mm
Dry weight2812 kg

Engine

Generac 1600TA
Oil capacity34.8 L
Coolant capacity85.0 L
Displacement16.0 L
AspirationTurbocharged/Aftercooled
Rated speed1800 rpm

Maintenance & consumables

for the Generac 1600TA
ItemSpecCapacityPart #Interval
Air filter find
Fuel filter find
Oil filterJohn Deere performance specifications find
Belt find
Coolant
Oilviscosity based on air temperature range between oil changes34.8

Compatible filters for the Generac 1600TA — cross-referenced via Donaldson. Options to verify against your serial number, not confirmed for this exact unit.

  • Air filter: John Deere AH115833 John Deere RE67829 John Deere AZ61133 John Deere AZ61134 Donaldson P532931
  • Fuel filter: John Deere N378886 John Deere AT365869 John Deere RE539465 John Deere AE20952 Donaldson P502392
  • Oil filter: John Deere RE561823 John Deere RE538245 Donaldson P550595 Donaldson P550938

Common questions

What is the power rating of the Generac SD400?

The Generac SD400 is rated 400 kW standby (400.0 kVA).

What engine does the Generac SD400 use?

The Generac SD400 is powered by the Generac 1600TA engine.

What fuel does the Generac SD400 use?

The Generac SD400 runs on Diesel.

What is the oil capacity of the Generac SD400?

The Generac 1600TA engine in the Generac SD400 has an oil capacity of 34.8 liters.

What alternator does the Generac SD400 use?

The Generac SD400 uses a 520 alternator. It has 4 poles. Insulation class H.

Parts

17
Part #DescriptionQtySystem
20145-17036Oil Filter1Oil filter PartsGeek
20145-17038Air Filter1Air filter PartsGeek
20145-17040Fuel Filter1Fuel filter PartsGeek
20145-17042Coolant Filter1Coolant filter PartsGeek
20145-17044Belt1Belt PartsGeek
20145-17046Spark Plug1Spark plug PartsGeek
A34471UN—11OCT881Service part / kit PartsGeek
RG13887UN—26JUL051Service part / kit PartsGeek
RG14798UN—23JUN061Service part / kit PartsGeek
RG14813UN—27MAR061Service part / kit PartsGeek
RG408540000007 UN—19—06MAY051Service part / kit PartsGeek
T6828ABOILSCAN ™ and COOLSCAN ™ are John Deere sampling programs to help you monitor machine performance and identify potential problems before they cause serious damage.Service part / kit PartsGeek
T6829ABOILSCAN ™ and COOLSCAN ™ are John Deere sampling programs to help you monitor machine performance and identify potential problems before they cause serious damage.Service part / kit PartsGeek
TS206UN—23AUG881Service part / kit PartsGeek
TS220UN—23AUG881Service part / kit PartsGeek
TS677UN—21SEP891Service part / kit PartsGeek
TS953UN—15MAY901Service 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
Prime25%26.16.9
Prime50%51.913.7
Prime75%77.620.5
Prime100%103.327.3
Standby25%31.88.4
Standby50%57.515.2
Standby75%83.322.0
Standby100%115.530.5

Available documents

Brochure — 0161170SBY (Generac)Brochure — 0166950SBY (Generac)Spec sheet — 0165880SBY (Generac)Spec sheet — 0169340SBY (Generac)Spec sheet — 0173380SBY (Generac)Spec sheet — 0185840SBY (Generac)Spec sheet — 0196210sby-c-sd400-12-5l-perkins-1 (Generac)Spec sheet — sd350-3 400-2Spec sheet — sd400-400kw-diesel-generator-mps-specsheet (Generac)Service manual — Generac wiring and everything else (Generac)

Other sets with this engine