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Kohler 125ROZJ Generator Set

The Kohler 125ROZJ is a 125 kW (156 kVA) diesel standby generator set powered by a John Deere 6076T engine. It is available at 120/240 V, 139/240 V, 127/220 V, 277/480 V, 220/380 V, 120/208 V and 347/600 V, single-phase, 60 Hz and rated 376 A. It holds about 21 L (5.5 gal) of oil and 24 L (6.3 gal) of coolant, with a maximum ambient rating of 45 °C. Starting uses battery rated 630 CCA at 12 V. The set measures 2654×864×1412 mm (104.5×34.0×55.6 in). The same 6076T engine also powers generator sets from John Deere.

125 kW
Standby
7.64 L
Displacement
21.0 L
Oil capacity
3
Document types

How to read your Kohler serial & model number →

Typical fuel consumption for 125–130 kW Diesel generators →

Compare with other 125–130 kW Diesel generators →

Service parts for the 125ROZJ

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

Fuel system

2 required
223414Fuel filter (primary)$13.45eBay
223953Fuel filter (secondary)$56.25NAPA

Oil system

1 required

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

Specifications

Fueldiesel
Frequency60.0 Hz
Standby power125 kW
Standby kVA156
Prime power115 kW
ControllerDecision-Maker 3 (Dec-3
Oil capacity21.0 L
Alternator4813 (Class Class H insulation)
Voltage options120/240 V, 139/240 V, 127/220 V, 277/480 V, 220/380 V, 120/208 V, 347/600 V
Phase3 (one voltage code single phase)
Rated current376 A
Power factor0.8 (3 phase); 1.0 (single phase)
Battery cranking630 CCA
Battery voltage12 V
Starting system12 V DC
Coolant capacity24 L
Max ambient45 °C
Dimensions (L×W×H)2654×864×1412 mm
Wet weight1640 kg

Engine

John Deere 6076T
Oil capacity21.0 L
Coolant capacity14.2 L
Displacement7.64 L
AspirationTurbocharged
Rated speed1800 rpm

Filters for the John Deere 6076T

3

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 filterP558329Lube Filter, Spin-On Full FlowJOHN DEERE 298393, JOHN DEERE 39937, NAPA 1824, WALGAHN-MOTORENTECHN 00811860 KuduParts $14.00
Fuel filterP556745Fuel Filter, BoxJOHN DEERE 346036, JOHN DEERE AR6145, NAPA 3371, BALDWIN BF959 KuduParts $16.00 FridayParts $22.47

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

SystemFilterDescriptionCross-references
Fuel / water separatorP551846Fuel Filter, Water Separator Spin-OnJOHN DEERE AT81478, JOHN DEERE DQ24057, BALDWIN BF46026-O, WEIDEMANN 1000168851 buy

Same engine, other brands

1 brand

The John Deere 6076T in this set also powers 1 generator set sold under 1 other brand. Service parts and maintenance intervals for the engine are shared; enclosure, alternator, controller and ratings are not.

BrandModels
John Deere125-150 ROZJ

Maintenance & consumables

for the John Deere 6076T
ItemSpecCapacityPart #Interval
Fuel filterPrimary223414 Amazon eBay $13.45 NAPA $34.79
Fuel filterSecondary223953 Amazon eBay $80.00 NAPA $56.25
Oil filter1 Full Flow/By-pass223673 Amazon eBay $26.99 NAPA $35.41 KuduParts $14.00
Coolant7.5 gal—
Oil22.0 qt—

Service specifications

8
TypeItemValueUnitCondition
OtherCompression ratio16.0:1
OtherFrequency regulation, no-load to full load, steady state+/- 0.33%%nominal/maximum 3% – 5%
OtherOne step load acceptance per NFPA-110100% of rating
SpeedPiston speed1188ft/min50 Hz
SpeedPiston speed1425ft/min60 Hz
SpeedRated rpm1500rpm50 Hz
SpeedRated rpm1800rpm60 Hz
VoltageVoltage regulation, no load to full load±2%%maximum

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

Recommended fluids

FluidGradeStandardAmbientCapacityNotes
Fuel#2 DieselRecommended fuel

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 125ROZJ?

The Kohler 125ROZJ is rated 125 kW standby (156.0 kVA).

Which engine powers the Kohler 125ROZJ?

The Kohler 125ROZJ is powered by the John Deere 6076T engine.

What fuel does the Kohler 125ROZJ use?

The Kohler 125ROZJ runs on diesel.

What's the oil capacity on a Kohler 125ROZJ?

The John Deere 6076T engine in the Kohler 125ROZJ has an oil capacity of 21.0 liters.

What is the cooling system capacity of the Kohler 125ROZJ?

The Kohler 125ROZJ cooling system holds 24 liters (6.3 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.

What is the prime power rating of the Kohler 125ROZJ?

The Kohler 125ROZJ is rated 115 kW prime (144 kVA), against 125 kW standby.

What voltages is the Kohler 125ROZJ available in?

The Kohler 125ROZJ is offered in 120/240 V, 139/240 V, 127/220 V, 277/480 V, 220/380 V, 120/208 V, 3 (one voltage code single phase)-phase.

What battery does the Kohler 125ROZJ use?

The Kohler 125ROZJ uses 12 V each, 630 CCA, per the manufacturer specification sheet. The starting system is 12 V DC.

What alternator does the Kohler 125ROZJ use?

The Kohler 125ROZJ uses a 4813 alternator. Insulation class Class H.

What oil filter does the Kohler 125ROZJ use?

The Kohler 125ROZJ uses oil filter part number 223673.

Which fuel filter part number does the Kohler 125ROZJ take?

The Kohler 125ROZJ uses fuel filter part numbers 223414, 223953.

Parts

14
Part #DescriptionQtySystem
241927Sensor, speed1Sensor Amazon eBay $75.00
243273Fuse, 3 amp5Service part / kit Amazon eBay
255126Bulb (lamp no. 1892)1Service part / kit Amazon eBay
283645Fuse, 15 Amp5Service part / kit Amazon eBay
291207Fuse, 1.5 amp1Service part / kit Amazon eBay
326228Block Heater1Service part / kit Amazon eBay NAPA $75.00
326229Block Heater1Service part / kit Amazon eBay
336184Installed Block Heater Kit (120V)Service part / kit eBay
336185Installed Block Heater Kit (240V)Service part / kit eBay
A-257099Circuit board, FR-II activator1Service part / kit Amazon eBay
B-292357Indicator Board1Service part / kit Amazon eBay
B-292902Photo Board / Split Activator1Service part / kit Amazon eBay FridayParts $271.50
C-255670Voltage Regulator1Service part / kit Amazon eBay
G-292806Main Circuit Board1Service part / kit Amazon eBay $550.00

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
Prime25%11.63.4
Prime50%17.14.5
Prime75%26.06.9
Prime100%30.58.1

Available documents

Spec sheet — Kohler-125ROZJ-spec-sheet (Kohler)Parts manual — tp5408 (Kohler)Service manual — tp5851 (Kohler)Service manual — tt1066 (Kohler)

This page was generated from the 4 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.

Full service, cheapest listings

Priced items from this model's own parts manual.

Fuel filter (primary) 223414$13.45
Fuel filter (secondary) 223953$56.25
Oil filter 223673$26.99
3 priced items$96.69
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