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Kohler 20REOZK Generator Set

The Kohler 20REOZK is a 23 kW (28.8 kVA) Diesel standby generator set powered by a Kohler KDI 2504M engine. It is available at 120/208 V, 127/220 V, 120/240 V, 139/240 V, 220/380 V, 277/480 V and 347/600 V, 3-phase, 60 Hz and rated 69.4 A. It holds about 11 L (2.9 gal) of oil and 11.4 L (3.0 gal) of coolant, with a maximum ambient rating of 50 °C. Starting uses 1 battery rated 650 CCA at 12 V. The set measures 1400×810×1085.5 mm (55.1×31.9×42.7 in) and weighs about 520 kg (1146 lb).

23 kW
Standby
3.178 L
Displacement
11.0 L
Oil capacity
3
Document types

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Specifications

FuelDiesel
Frequency60.0 Hz
Standby power23 kW
Standby kVA28
Prime power20 kW
EmissionsTier 4i
ControllerAPM402, Decision-Maker 3000
Oil capacity11.0 L
Alternator4D5.0
Voltage options120/208 V, 127/220 V, 120/240 V, 139/240 V, 220/380 V, 277/480 V, 347/600 V
Phase3
Rated current69.4 A
Power factor0.8
Battery cranking650 CCA
Battery voltage12 V
Battery quantity1
Coolant capacity11.4 L
Engine jacket water4.4 L
Max ambient50 °C
Dimensions (L×W×H)1400×810×1085 mm
Dry weight520 kg

Engine

Kohler KDI 2504M
Oil capacity11.5 L
Coolant capacity11.4 L
Displacement3.178 L
AspirationNatural
Rated speed1800 rpm

Maintenance & consumables

for the Kohler KDI 2504M
ItemSpecCapacityPart #Interval
Oilgenuine oil and filters recommended by Rehlko—

Service specifications

30
TypeItemValueUnitCondition
Other10 in. weld flange bolt circle diameter B361.95mm (14.25 in.)
Other10 in. weld flange outside diameter C406.4mm (16.0 in.)
Other10 in. weld flange quantity of bolts / bolt hole diameter D12, 25.40mm (1.00 in.)
Other12 in. weld flange bolt circle diameter B431.80mm (17.00 in.)
Other12 in. weld flange outside diameter C482.6mm (19.0 in.)
Other12 in. weld flange quantity of bolts / bolt hole diameter D12, 25.40mm (1.00 in.)
Other14 in. weld flange bolt circle diameter B476.25mm (18.75 in.)
Other14 in. weld flange outside diameter C533.4mm (21.0 in.)
Other14 in. weld flange quantity of bolts / bolt hole diameter D12, 28.58mm (1.13 in.)
Other16 in. weld flange bolt circle diameter B539.75mm (21.25 in.)
Other16 in. weld flange outside diameter C596.9mm (23.5 in.)
Other16 in. weld flange quantity of bolts / bolt hole diameter D16, 28.58mm (1.13 in.)
Other18 in. weld flange bolt circle diameter B577.85mm (22.75 in.)
Other18 in. weld flange outside diameter C635.0mm (25.0 in.)
Other18 in. weld flange quantity of bolts / bolt hole diameter D16, 31.75mm (1.25 in.)
Other20 in. weld flange bolt circle diameter B635.00mm (25.00 in.)
Other20 in. weld flange outside diameter C698.5mm (27.5 in.)
Other20 in. weld flange quantity of bolts / bolt hole diameter D20, 31.75mm (1.25 in.)
Other5 in. weld flange bolt circle diameter B215.90mm (8.50 in.)
Other5 in. weld flange outside diameter C241.30mm (9.50 in.)
Other5 in. weld flange quantity of bolts / bolt hole diameter D8, 22.23mm (0.88 in.)
Other6 in. weld flange bolt circle diameter B254.0mm (10.0 in.)
Other6 in. weld flange outside diameter C279.4mm (11.0 in.)
Other6 in. weld flange quantity of bolts / bolt hole diameter D8, 22.23mm (0.88 in.)
Other8 in. weld flange bolt circle diameter B298.45mm (11.75 in.)
Other8 in. weld flange outside diameter C342.9mm (13.5 in.)
Other8 in. weld flange quantity of bolts / bolt hole diameter D8, 22.23mm (0.88 in.)
OtherWeld flange angle A (10, 12, 14 in. nominal pipe size)30deg.
OtherWeld flange angle A (16, 18, 20 in. nominal pipe size)22.5deg.
OtherWeld flange angle A (5, 6, 8 in. nominal pipe size)45deg.

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Common questions

What is the power rating of the Kohler 20REOZK?

The Kohler 20REOZK is rated 23 kW standby (28.8 kVA).

What engine is in the Kohler 20REOZK?

The Kohler 20REOZK is powered by the Kohler KDI 2504M engine.

What kind of fuel does the Kohler 20REOZK run on?

The Kohler 20REOZK runs on Diesel.

What's the oil capacity on a Kohler 20REOZK?

The Kohler KDI 2504M engine in the Kohler 20REOZK has an oil capacity of 11.5 liters.

What is the cooling system capacity of the Kohler 20REOZK?

The Kohler 20REOZK cooling system holds 11.4 liters (3.0 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.

What is the continuous rating of the Kohler 20REOZK?

The Kohler 20REOZK is rated 20 kW prime (25 kVA), against 23 kW standby.

What is the dry weight of the Kohler 20REOZK?

The Kohler 20REOZK has a dry weight of 520 kg (1146 lb).

What voltage does the Kohler 20REOZK produce?

The Kohler 20REOZK is offered in 120/208 V, 127/220 V, 120/240 V, 139/240 V, 220/380 V, 277/480 V, 3-phase.

How many cold cranking amps does the Kohler 20REOZK require?

The Kohler 20REOZK uses 1 battery, 12 V each, 650 CCA, per the manufacturer specification sheet.

Which alternator is fitted to the Kohler 20REOZK?

The Kohler 20REOZK uses a 4D5.0 alternator.

Parts

1
Part #DescriptionQtySystem
ED0082051370-SCOV.HEAD GASK.-OR SET 2504 M1Gasket Amazon eBay $49.90

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%2.40.6
Prime50%3.81.0
Prime75%5.41.4
Prime100%7.11.9
Standby25%2.40.6
Standby50%4.11.1
Standby75%6.01.6
Standby100%7.82.1

Available documents

Spec sheet (Kohler)Spec sheet — g5435 (Kohler)Reference (Kohler)Reference — 15-60REOZK G6141 (Kohler)Reference — G6-39 0918AZ (Kohler)Parts manual — TP6896 (Lombardini)Service manual — sb616 (Kohler)Service manual — tp6924 (Kohler)

This page was generated from the 8 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.

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