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Kohler 400REOZJ Generator Set

The Kohler 400REOZJ is a 400 kW (500 kVA) Diesel standby generator set powered by a John Deere 6135HF485 engine. It is available at 120/208 V, 127/220 V, 139/240 V, 220/380 V, 240/416 V, 277/480 V and 347/600 V, 3-phase and 60 Hz. It holds about 42 L (11.1 gal) of oil and 67.2 L (17.8 gal) of coolant, with a maximum ambient rating of 50 °C. Starting uses 2 batteries rated 925 CCA at 12 V. The set measures 3630×1725×1993 mm (142.9×67.9×78.5 in). The same 6135HF485 engine also powers generator sets from Generac.

400 kW
Standby
13.5 L
Displacement
42.0 L
Oil capacity
6
Document types

How to read your Kohler serial & model number →

Specifications

FuelDiesel
Frequency60.0 Hz
Standby power400 kW
Standby kVA500
Prime power365 kW
EmissionsTier 3 EPA-Certified
ControllerAPM402, APM603, Decision-Maker 550, Decision-Maker 6000
Oil capacity42.0 L
Alternator4M4021, 5M4027, 5M4028, 4M4266, 5M4272 (4-pole, Class H insulation)
Voltage options120/208 V, 127/220 V, 139/240 V, 220/380 V, 240/416 V, 277/480 V, 347/600 V
Phase3
Power factor0.8
Battery cranking925 CCA
Battery voltage12 V
Battery quantity2
Coolant capacity67.2 L
Max ambient50 °C
Dimensions (L×W×H)3630×1725×1993 mm

Engine

John Deere 6135HF485
Oil capacity42.0 L
Coolant capacity67.2 L
Displacement13.5 L
AspirationTurbocharged, Charge Air-Cooled
Rated speed1800 rpm

Maintenance & consumables

for the John Deere 6135HF485
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 changes

Compatible filters for the John Deere 6135HF485 — 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 Kohler 400REOZJ?

The Kohler 400REOZJ is rated 400 kW standby (500.0 kVA).

What engine does the Kohler 400REOZJ use?

The Kohler 400REOZJ is powered by the John Deere 6135HF485 engine.

What fuel does the Kohler 400REOZJ use?

The Kohler 400REOZJ runs on Diesel.

What is the oil capacity of the Kohler 400REOZJ?

The John Deere 6135HF485 engine in the Kohler 400REOZJ has an oil capacity of 42.0 liters.

What alternator does the Kohler 400REOZJ use?

The Kohler 400REOZJ uses a 4M4021, 5M4027, 5M4028, 4M4266, 5M4272 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%29.67.8
Prime50%52.113.8
Prime75%75.119.8
Prime100%101.326.8
Standby25%31.98.4
Standby50%57.915.3
Standby75%83.822.1
Standby100%115.730.6

Available documents

Brochure — 350-500REOZJ G6117 (Kohler)Brochure — G6-39 0918AZ (Kohler)Brochure — GSA Product List (Kohler)Spec sheet (Kohler)Spec sheet — Kohler-400REOZJ (Kohler)Spec sheet — g5354 (Kohler)Spec sheet — g5620 (Kohler)Reference — FinalGSAPriceListEffective 3-20-2023 (Kohler)Reference — GSAPriceList (Kohler)Parts manual — kohler consolidated price list (Kohler)Service manual — tp7149 (Kohler)Wiring diagram — tp6797 (Kohler)

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