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Kohler KD120U Generator Set

The Kohler KD120U is a 50 kW (50 kVA) Diesel standby generator set powered by a John Deere 6068TF220 engine. It is available at 127/220 V, 115/230 V, 220/380 V, 230/400 V, 240/415 V and 115/200 V, 3-phase and 50 Hz. It holds about 20.6 L (5.4 gal) of oil and 27.3 L (7.2 gal) of coolant, with a maximum ambient rating of 50 °C. Starting uses 1 battery rated 760 CCA at 12 V. The set weighs about 1470 kg (3241 lb). An integrated tank holds 340 L (89.8 gal). The same 6068TF220 engine also powers generator sets from SDMO.

50 kW
Standby
6.7 L
Displacement
20.6 L
Oil capacity
1
Document types

How to read your Kohler serial & model number →

Typical fuel consumption for 50–55 kW Diesel generators →

Compare with other 50–55 kW Diesel generators →

On this pageService partsSpecsEngineMaintenanceFuel consumptionDocumentsFAQ

Service parts for the KD120U

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

Fuel system

1 required
RE60021Fuel filter$6.98PartsGeek

Oil system

1 required
RE504836Oil filter$41.55Amazon

Belts

1 required
DZ114929Belt$46.24eBay

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

Specifications

FuelDiesel
Frequency50.0 Hz
Standby power50 kW
Standby kVA50
Prime power50 kW
ControllerDecision-Makert 1000
Oil capacity20.6 L
AlternatorLeroy-Somer LSA442S7 (4-pole, Class IP23 insulation)
Voltage options127/220 V, 115/230 V, 220/380 V, 230/400 V, 240/415 V, 115/200 V
Phase3
Power factor0.8
Battery cranking760 CCA
Battery voltage12 V
Battery quantity1
Coolant capacity[27.3] L
Max ambient[50] °C
Dry weight1470 kg
Fuel tank340.0 L

Engine

John Deere 6068TF220
Oil capacity21.5 L
Coolant capacity27.3 L
Displacement6.7 L
AspirationTurbocharged
Rated speed1500 rpm

Maintenance & consumables

for the John Deere 6068TF220
ItemSpecCapacityPart #Interval
Fuel filterFUEL FILTERRE60021 Amazon $65.19 eBay $16.99 PartsGeek $6.98 FridayParts $14.99
Oil filterOIL FILTERRE504836 Amazon $41.55 eBay $44.99 FridayParts $20.99
BeltFAN BELTDZ114929 Amazon eBay $46.24

Common questions

What size generator is the Kohler KD120U?

The Kohler KD120U is rated 50 kW standby (50.0 kVA).

What engine does the Kohler KD120U use?

The Kohler KD120U is powered by the John Deere 6068TF220 engine.

What fuel does the Kohler KD120U use?

The Kohler KD120U runs on Diesel.

How much oil does the Kohler KD120U take?

The John Deere 6068TF220 engine in the Kohler KD120U has an oil capacity of 21.5 liters.

What alternator comes on the Kohler KD120U?

The Kohler KD120U uses a Leroy-Somer LSA442S7 alternator. It has 4 poles. Insulation class IP23.

What oil filter fits the Kohler KD120U?

The Kohler KD120U uses oil filter part number RE504836.

Which fuel filter part number does the Kohler KD120U take?

The Kohler KD120U uses fuel filter part number RE60021.

Parts

70
Part #DescriptionQtySystem
DZ110083STARTER1Starter Amazon eBay
DZ114929FAN BELTBelt Amazon eBay $46.24
DZ114956ALTERNATORAlternator Amazon eBay $117.95
DZ115455FAN BELTBelt Amazon eBay $42.30
DZ115812FAN BELT (LGTH = 1680 mm)1Belt Amazon eBay $54.89
DZ117267FAN BELT (LGTH = 1690 mm)1Belt Amazon eBay $43.31
DZ117268FAN BELT (LGTH = 1530 mm)1Belt Amazon eBay FridayParts $56.36
DZ117503ALTERNATOR1Alternator Amazon eBay
DZ118286OIL FILTER8801Oil filter Amazon $25.38 eBay $30.00 FridayParts $43.00
DZ118764FAN BELTBelt Amazon eBay $35.00
DZ118781FAN BELT (LGTH = 1700 mm)2Belt Amazon eBay $44.89
DZ118815FAN BELT (LGTH = 1725 mm)1Belt Amazon eBay $55.43
DZ119018FAN BELTBelt Amazon eBay
DZ119059FAN BELT(LGTH = 1515 mm)Belt Amazon eBay $38.00
DZ119060FAN BELT (LGTH = 1555 mm)Belt Amazon eBay
DZ119061FAN BELT (LGTH = 1540 mm)2Belt Amazon eBay $54.19
DZ119062FAN BELTBelt Amazon eBay
DZ119063(LGTH=1563 mm) (24HC)1Belt Amazon eBay $35.23
DZ119416FAN BELTBelt Amazon eBay $58.00
DZ119477FAN BELT (LGTH = 1565 mm)1Belt Amazon eBay $55.00
DZ119478FAN BELT (LGTH = 1570 mm)Belt Amazon eBay $16.57
DZ119515FAN BELT(LGTH = 1585 mm)Belt Amazon eBay
DZ119516FAN BELTBelt Amazon eBay
DZ119520FAN BELTBelt Amazon eBay
DZ119521FAN BELTBelt Amazon eBay
DZ119522FAN BELT1Belt Amazon eBay $42.49
DZ119530FAN BELT (LGTH = 1675 mm)2Belt Amazon eBay $66.99
DZ119531FAN BELTBelt Amazon
DZ119533FAN BELTBelt Amazon eBay $51.95
DZ119715FAN BELTBelt Amazon eBay
DZ129200STARTERStarter Amazon eBay
R134625FAN BELTBelt Amazon eBay
RE501150STARTER(24V) (3041)Starter Amazon eBay FridayParts $179.99
RE501166STARTERStarter Amazon eBay $397.53
RE504836OIL FILTER1Oil filter Amazon $41.55 eBay $44.99 FridayParts $20.99
RE505895ALTERNATORAlternator Amazon eBay $192.99
RE506196ALTERNATORAlternator Amazon
RE523501(STARTER MOTOR KIT, KIT, STARTER ISK) (3073)Starter Amazon eBay $216.60 FridayParts $285.90
RE523502STARTER1Starter Amazon $210.00 eBay $213.99 FridayParts $187.69
RE533516ALTERNATOR(12V, 75A)Alternator Amazon eBay $110.00 FridayParts $100.49
RE533653ALTERNATOR1Alternator Amazon eBay FridayParts $100.50
RE533654ALTERNATOR1Alternator Amazon eBay FridayParts $167.96
RE537146(28V, 50A, ISKRA) (3142)1Alternator Amazon eBay $89.90
RE540302STARTERStarter Amazon eBay $137.95
RE549229STARTERStarter Amazon eBay $484.01 FridayParts $189.99
RE60021FUEL FILTER1Fuel filter Amazon $65.19 eBay $16.99 PartsGeek $6.98 FridayParts $14.99
RE62419FUEL FILTER1Fuel filter Amazon eBay $20.88 KuduParts $17.00
RE64474STARTERStarter Amazon eBay $397.53
RE65175STARTERStarter Amazon eBay $527.75 FridayParts $394.70
RE65189STARTERStarter Amazon eBay $421.99 FridayParts $394.70
RE70474STARTERStarter Amazon eBay $280.99 FridayParts $269.67
RE70957STARTER(12V) (3006)Starter Amazon eBay
RE70960STARTERStarter Amazon eBay $186.95
RE70961STARTERStarter Amazon eBay $155.90 FridayParts $260.84
T428692FAN BELT (LGTH = 1665 mm)1Belt Amazon eBay
T428724FAN BELT (LGTH = 1575 mm)1Belt Amazon eBay $42.24
T428725FAN BELTBelt Amazon eBay
T428818FAN BELTBelt Amazon eBay
T428820FAN BELT (LGTH = 1580 mm)Belt Amazon eBay FridayParts $25.60
T428822FAN BELTBelt Amazon eBay
T428823FAN BELTBelt Amazon eBay $36.00
T428825FAN BELT1Belt Amazon eBay
T428863FAN BELTBelt Amazon eBay FridayParts $40.86
R128658FAN PULLEY(OD = 140 mm)Service part / kit Amazon $147.77 eBay
R128660FAN PULLEY(OD = 168 MM)Service part / kit Amazon $142.41 eBay $72.11 FridayParts $121.60
R128662FAN PULLEY(OD = 203 MM)Service part / kit Amazon eBay $175.75
R133295CRANKSHAFT PULLEY (OD = 169 mm)Service part / kit Amazon eBay $89.99
R133296CRANKSHAFT PULLEY & DAMPERService part / kit Amazon
RE500013CRANKSHAFT PULLEY & DAMPERService part / kit Amazon eBay $799.00
RE59355CRANKSHAFT PULLEY & DAMPERService part / kit Amazon eBay $285.00

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
Prime100%32.08.5
Standby110%34.59.1

Available documents

Spec sheet — KD120U-KD130-g5529 (Kohler)
Full service, cheapest listings

Priced items from this model's own parts manual.

Fuel filter RE60021$6.98
Oil filter RE504836$41.55
Belt DZ114929$46.24
3 priced items$94.77
Other sets with this engine
Kohler KD130SDMO J 130 KSDMO J120SDMO JS120USDMO R135