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Cummins/Onan C45D5 Generator Set

The Cummins/Onan C45D5 is a 34 kW (42 kVA) Diesel standby generator set powered by a Cummins/Onan 4B3.9-G2 engine. It is available at 50 V, 480/277 V, 380/220 V and 220/127 V. It holds about 10.9 L (2.9 gal) of oil and 7.2 L (1.9 gal) of coolant, with a maximum ambient rating of 27 °C. The set measures 2730×1090×1865 mm (107.5×42.9×73.4 in) and weighs about 1070 kg (2359 lb). An integrated tank holds 200 L (52.8 gal).

34 kW
Standby
3.9 L
Displacement
10.9 L
Oil capacity
1
Document types

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Specifications

FuelDiesel
Standby power34 kW
Standby kVA42
Prime power31 kW
Oil capacity10.9 L
Voltage options50 V, 480/277 V, 380/220 V, 220/127 V
Power factor0.8
Battery quantity1
Coolant capacity7.2 L
Max ambient27 °C
Dimensions (L×W×H)2730×1090×1865 mm
Dry weight1070 kg
Fuel tank200.0 L

Engine

Cummins/Onan 4B3.9-G2
Oil capacity10.9 L
Coolant capacity16.9 L
Displacement3.9 L
AspirationNaturally aspirated
Rated speed1800 rpm

Filters for the Cummins/Onan 4B3.9-G2

6

Engine-mounted filters the filter manufacturers list for this engine family. These come from the engine, not from this generator set’s own parts list, so confirm against your serial number before ordering.

SystemFilterDescriptionCross-references
Oil filterP558616Lube Filter, Spin-On Full FlowCUMMINS 3290712, CUMMINS 3890709, NAPA 1602, BALDWIN BT427 KuduParts $11.00 FridayParts $13.20
Fuel filterP550440Fuel Filter, Spin-On SecondaryCUMMINS 3831063, CUMMINS 3890707, NAPA 3358, BALDWIN BF788 FridayParts $356.80
Fuel filterP550974Fuel Filter, In-LineCUMMINS 3826094, NAPA 3270, BLAW KNOX 0016481600, PERKINS 102601 FridayParts $356.80
Fuel / water separatorP551329Fuel Filter, Water Separator Spin-On Twist&DrainCUMMINS 11E170210, CUMMINS 3890063, NAPA 3357, BALDWIN BF1280 FridayParts $151.00
Fuel / water separatorP550248Fuel Filter, Water Separator Spin-On Twist&DrainCUMMINS 1492827, CUMMINS 3286503, NAPA 3472, BALDWIN BF1226 FridayParts $229.00

Listed for this engine in only one kind of machine, so they may depend on how the engine was installed:

SystemFilterDescriptionCross-references
Coolant filterP554071Coolant Filter, Spin-OnCUMMINS 209604, CUMMINS 209606, NAPA 4071, WALGAHN-MOTORENTECHN 00811412 FridayParts $397.60

Maintenance & consumables

for the Cummins/Onan 4B3.9-G2
ItemSpecCapacityPart #Interval
Air filterNormal duty air filter.—
Fuel filterOil and fuel filter fitted, water separator.—
Oil filterOil and fuel filter fitted, water separator.—695 hr
BatterySet mounted starting battery.×1—
Belt—
CoolantCooling system: IC 01, coolant capacity (only engine): 7.2 litros, coolant capacity (engine and radiator): 17.3 liters.17.3 l—
OilLubrication system oil capacity10.9 l—
Spark plug—

Common questions

What size generator is the Cummins/Onan C45D5?

The Cummins/Onan C45D5 is rated 34 kW standby (42.0 kVA).

What engine does the Cummins/Onan C45D5 use?

The Cummins/Onan C45D5 is powered by the Cummins/Onan 4B3.9-G2 engine.

What kind of fuel does the Cummins/Onan C45D5 run on?

The Cummins/Onan C45D5 runs on Diesel.

How much oil does the Cummins/Onan C45D5 take?

The Cummins/Onan 4B3.9-G2 engine in the Cummins/Onan C45D5 has an oil capacity of 10.9 liters.

What is the cooling system capacity of the Cummins/Onan C45D5?

The Cummins/Onan C45D5 cooling system holds 7.2 liters (1.9 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.

What is the continuous rating of the Cummins/Onan C45D5?

The Cummins/Onan C45D5 is rated 31 kW prime (39 kVA), against 34 kW standby.

What is the dry weight of the Cummins/Onan C45D5?

The Cummins/Onan C45D5 has a dry weight of 1070 kg (2358 lb).

How big is the fuel tank on the Cummins/Onan C45D5?

The Cummins/Onan C45D5 has a 200 liter (53 US gallon) fuel tank.

What voltage does the Cummins/Onan C45D5 produce?

The Cummins/Onan C45D5 is offered in 50 V, 480/277 V, 380/220 V, 220/127 V.

What battery does the Cummins/Onan C45D5 use?

The Cummins/Onan C45D5 uses 1 battery, per the manufacturer specification sheet.

Fuel consumption

RatingLoadL/hgal/h
Prime50%9.02.38
Standby50%10.02.64

Available documents

Spec sheet — C45D5 EN (Cummins/Onan)

This page was generated from the 1 manufacturer document above by automated extraction; every figure shown is copied from one of them. How the data is compiled.

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