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Kohler 3250REOZD Generator Set

The Kohler 3250REOZD is a 3250 kW (3500 kVA) diesel standby generator set powered by a MTU 20V4000G83L 20V4000G63L engine. It is available at 480 V, 3-phase, 60 Hz and rated 4511 A. It holds about 390 L (103.0 gal) of oil and 818 L (216.1 gal) of coolant, with a maximum ambient rating of 40 °C. Starting uses 4 group-Four batteries rated 1150 CCA at 24 V.

3250 kW
Standby
95.4 L
Displacement
390.0 L
Oil capacity
3
Document types

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Service parts for the 3250REOZD

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

Belts

1 required
GM24553Beltsee priceAmazon

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

Specifications

Fueldiesel
Frequency60.0 Hz
Standby power3250 kW
Standby kVA3500
Prime power2800 kW
EmissionsTier 2
ControllerKohler designed controllers
Oil capacity390.0 L
AlternatorFast-Response PMG (Class Class H insulation)
Voltage options480 V
Phase3-phase
Rated current4511 A
Power factor0.8
Circuit breaker4511 A
Battery groupFour
Battery cranking1150 CCA
Battery voltage24 V
Battery quantity4
Coolant capacity818.0 L
Max ambient40 °C

Engine

MTU 20V4000G83L 20V4000G63L
Oil capacity390.0 L
Coolant capacity205.0 L
Displacement95.4 L
AspirationTurbocharged, Intercooled
Rated speed1800 rpm

Filters & service parts

model family
ItemSpecCapacityPart #Interval
Fuel filter—
Oil filter—
BeltGM24553 Amazon eBay

Compiled from this model's family documentation — may include parts for closely-related variants. Confirm the exact part for your serial number.

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.

Voltage reconnection

VoltagePhaseConnectionLeadsNotes
12-lead optional voltage connections12Alternator optional feature
4-lead dedicated voltages4Alternator standard feature
110/127/139/240/254/277single-phaseswitchableTowable generator model specifications; some models n/a
208/220/240/415/440/4803-phasereconnectableTowable generator model specifications
208/220/240/415/440/4803-phaseswitchableTowable generator model specifications

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

How many kW is the Kohler 3250REOZD?

The Kohler 3250REOZD is rated 3250 kW standby (3500.0 kVA).

Which engine powers the Kohler 3250REOZD?

The Kohler 3250REOZD is powered by the MTU 20V4000G83L 20V4000G63L engine.

Is the Kohler 3250REOZD diesel or gas?

The Kohler 3250REOZD runs on diesel.

What is the oil capacity of the Kohler 3250REOZD?

The MTU 20V4000G83L 20V4000G63L engine in the Kohler 3250REOZD has an oil capacity of 390.0 liters.

What is the coolant capacity of the Kohler 3250REOZD?

The Kohler 3250REOZD cooling system holds 818 liters (216.1 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.

What is the prime power rating of the Kohler 3250REOZD?

The Kohler 3250REOZD is rated 2800 kW prime (3500 kVA), against 3250 kW standby.

What voltage does the Kohler 3250REOZD produce?

The Kohler 3250REOZD is offered in 480 V, 3-phase-phase.

What battery does the Kohler 3250REOZD use?

The Kohler 3250REOZD uses 4 batteryies, 24 V each, 1150 CCA, group Four, per the manufacturer specification sheet.

What alternator comes on the Kohler 3250REOZD?

The Kohler 3250REOZD uses a Fast-Response PMG alternator. Insulation class Class H.

Parts

16model family
Part #DescriptionQtySystem
279720Hose, hump4Hose Amazon
279736Element, primary2Air filter Amazon eBay NAPA $228.15
279737Element, secondary2Air filter Amazon eBay
279738Element, primary1Air filter Amazon eBay KuduParts $248.00
279739Element, air cleaner, inner1Air filter Amazon eBay FridayParts $165.75
347957Hose, 45 deg elbow, 8.00 in. ID1Hose buy
GM23518Hose, hump, 8.00 in. ID1Hose buy
GM23519Hose, 90 deg elbow, 8.00 in. ID1Hose buy
GM24553Alternator BeltBelt Amazon eBay
GM28302Hose, straight air, 8.00 in. ID1Hose buy
GM30213ThermostatThermostat eBay
GM35390SealSeal eBay $27.99
GM51785Alternator BeltBelt Amazon eBay
GM64086Alternator BeltBelt Amazon eBay
GM69997Element, Primary (Outer)1Air filter Amazon eBay $108.80
GM69998Element, Secondary (Inner)1Air filter Amazon eBay $66.30

Compiled from this model's family documentation — may include parts for closely-related variants. Confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.

Available documents

Spec sheet — Kohler-3250REOZD (Kohler)Spec sheet — g5400 (Kohler)Reference — G6-39 0918AZ (Kohler)Reference — Katalog-promyshlennoj-produktsii (Kohler)Reference — ProfessionalSportsArenaCaseStudy (Kohler)Reference — tp6485 (Kohler)Parts manual — tp6217 (Kohler)

This page was generated from the 7 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.