Specifications
| Fuel | Diesel |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 55 kW |
| Standby kVA | 69 |
| Prime power | 50 kW |
| Controller | Decision-Maker 1, Decision-Maker 340, Engine Gauge Box |
| Oil capacity | 13.2 L |
| Voltage options | 120/208 V, 120/240 V, 127/220 V, 139/240 V, 220/380 V, 277/480 V, 347/600 V |
| Phase | 3 |
| Rated current | 191 A |
| Power factor | 0.8 |
| Battery cranking | 640 CCA |
| Battery voltage | 12 V |
| Battery quantity | 1 |
| Coolant capacity | 18 L |
| Max ambient | 50 °C |
| Dimensions (L×W×H) | 2083×737×1093 mm |
| Dry weight | 823 kg |
Engine
| Oil capacity | 13.2 L |
|---|---|
| Coolant capacity | 18.0 L |
| Displacement | 3.92 L |
| Aspiration | Turbocharged |
| Rated speed | 1800 rpm |
Maintenance & consumables
for the John Deere 4039T| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Fuel filter | Primary | 223414 | Amazon eBay PartsGeek | ||
| Oil filter | 229678 | Amazon eBay $21.99 PartsGeek $7.98 |
Common questions
What is the power rating of the Kohler 50ROZ?
The Kohler 50ROZ is rated 55 kW standby (69.0 kVA).
What engine does the Kohler 50ROZ use?
The Kohler 50ROZ is powered by the John Deere 4039T engine.
What fuel does the Kohler 50ROZ use?
The Kohler 50ROZ runs on Diesel.
What is the oil capacity of the Kohler 50ROZ?
The John Deere 4039T engine in the Kohler 50ROZ has an oil capacity of 13.2 liters.
What oil filter does the Kohler 50ROZ use?
The Kohler 50ROZ uses oil filter part number 229678.
What fuel filter does the Kohler 50ROZ use?
The Kohler 50ROZ uses fuel filter part number 223414.
Parts
227model family| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 222337 | Air Cleaner, Heavy Duty | 1 | Air filter | PartsGeek |
| 222338 | Air Cleaner, Heavy Duty | 1 | Air filter | PartsGeek |
| 223595 | Thermostat | 1 | Thermostat | PartsGeek |
| 223604 | Filter, oil | 1 | Oil filter | Amazon eBay PartsGeek |
| 223626 | Gasket | 1 | Gasket | PartsGeek |
| 223640 | Belt, 11/16" x 49.5" | 1 | Belt | Amazon eBay $999.95 PartsGeek |
| 223673 | Filter, oil | 1 | Oil filter | Amazon eBay PartsGeek FridayParts $15.90 |
| 223676 | Thermostat | 1 | Thermostat | PartsGeek |
| 223762 | Thermostat Gasket | 1 | Gasket | PartsGeek |
| 223941 | Injector | 1 | Injector | PartsGeek |
| 223953 | Filter, fuel | 1 | Fuel filter | Amazon eBay $49.90 PartsGeek |
| 223959 | Fan Belt | 1 | Belt | Amazon eBay $26.00 PartsGeek |
| 223965 | Injector | 1 | Injector | PartsGeek |
| 224012 | Gasket | 1 | Gasket | PartsGeek |
| 224171 | Injector | 1 | Injector | PartsGeek |
| 224256 | Fan Belt | 1 | Belt | Amazon eBay $29.99 PartsGeek |
| 224263 | Belt, 11/16 x 49 1/2 in. | 1 | Belt | Amazon eBay $20.00 PartsGeek |
| 224299 | Injector | 1 | Injector | PartsGeek |
| 224795 | Filter, fuel (round) | 1 | Fuel filter | Amazon eBay PartsGeek |
| 241062 | Plug, drain | 1 | Spark plug | PartsGeek |
| 241308 | Switch, temperature | 1 | Sensor | PartsGeek |
| 241481 | Switch, high temperature 268298 Sender, water temperature | 1 | Sensor | PartsGeek |
| 241623 | Sensor, speed (all models) | 1 | Sensor | PartsGeek |
| 241927 | Sensor, speed | 1 | Sensor | PartsGeek |
| 253107 | Element, Air Cleaner | 1 | Air filter | Amazon eBay $69.00 PartsGeek |
| 253108 | Element, air cleaner | 1 | Air filter | Amazon eBay $20.45 PartsGeek |
| 254477 | Element, air cleaner | 1 | Air filter | Amazon eBay PartsGeek |
| 254832 | Coolant Level Sensor (serial 363369 and after) | 1 | Sensor | PartsGeek |
| 255520 | Hose, elbow 45 deg. | 1 | Hose | PartsGeek |
| 257830 | Tolerance Ring | 1 | Seal | PartsGeek |
| 258423 | Element, air cleaner | 1 | Air filter | Amazon eBay $36.43 PartsGeek |
| 258883 | Cleaner assembly, air | 1 | Air filter | PartsGeek |
| 265461 | Line, flex. fuel, 18” | 1 | Hose | PartsGeek |
| 268298 | Sender, water temperature gauge | 1 | Sensor | PartsGeek |
| 268371 | Alternator Assembly | 1 | Alternator | PartsGeek |
| 269373 | Alternator Assembly | 5 | Alternator | PartsGeek |
| 273404 | Coolant Level Sensor assembly (includes conduit, connector, pin, sensor; before serial 363369) | 1 | Sensor | PartsGeek |
| 273417 | Hose, upper radiator | 1 | Hose | PartsGeek |
| 273418 | Hose, lower radiator | 1 | Hose | PartsGeek |
| 273442 | Hose, hump 3 id x 5 1/2 | 1 | Hose | PartsGeek |
| 273443 | Hose, lower radiator | 1 | Hose | PartsGeek |
| 273444 | Hose, upper radiator | 1 | Hose | PartsGeek |
| 273462 | Hose, upper radiator | 1 | Hose | PartsGeek |
| 273463 | Hose, lower radiator | 1 | Hose | PartsGeek |
| 273520 | Float switch assembly 12V DC | 1 | Sensor | PartsGeek |
| 273692 | Adapter, water temperature sensor | 1 | Sensor | PartsGeek |
| 273693 | O-ring | 1 | Seal | PartsGeek |
| 273758 | Pickup, RPM | 1 | Sensor | PartsGeek |
| 273777 | Hose, lower radiator | 1 | Hose | PartsGeek |
| 273930 | Hose, lower radiator | 1 | Hose | PartsGeek |
| 274726 | Element, air cleaner | 1 | Air filter | Amazon eBay $69.99 PartsGeek |
| 274729 | Element, air cleaner | Air filter | PartsGeek | |
| 276574 | Hose, molded | 1 | Hose | PartsGeek |
| 278850 | Insulator | 1 | Seal | PartsGeek |
| 280133 | Alternator Assembly | 1 | Alternator | PartsGeek |
| 282814 | Alternator Assembly | 1 | Alternator | PartsGeek |
| 282897 | Gauge, oil pressure | 1 | Sensor | PartsGeek |
| 291891 | Solenoid, starter | 1 | Starter | PartsGeek |
| 324053 | Hose, air intake, variation 2) | 1 | Hose | PartsGeek |
| 324071 | Hose, air intake, variation 3) | 1 | Hose | PartsGeek |
| 324134 | Element, Air Cleaner(Branded 1 Per Case) | 1 | Air filter | Amazon eBay PartsGeek |
| 324136 | Hose, air intake, variation 4) | 1 | Hose | PartsGeek |
| 324329 | Hose, air intake, variation 5) | 1 | Hose | PartsGeek |
| 324418 | Element, Air Cleaner(Branded 1 Per Case) | 1 | Air filter | Amazon eBay PartsGeek |
| 324436 | Element, air cleaner, variation 6) | 1 | Air filter | Amazon eBay $10.39 PartsGeek |
| 324461 | Hose, air intake, variation 6) | 1 | Hose | PartsGeek |
| 326331 | Hose, hump, straight, 3 in. ID | 1 | Hose | PartsGeek |
| 328006 | Hose, reducer (3.00 in. to 2.50 in. ID) | 1 | Air filter | PartsGeek |
| 328308 | Pressure Switch | 1 | Sensor | PartsGeek |
| 328309 | Switch assembly, pressure (oil pressure) | 1 | Sensor | PartsGeek |
| 336101 | Hose, upper radiator | 1 | Hose | PartsGeek |
| 336445 | Thermostat Gasket | 1 | Gasket | PartsGeek |
| 336545 | Fuel Filter | 1 | Fuel filter | Amazon eBay PartsGeek |
| 336923 | Switch, high temperature shutdown | 1 | Sensor | PartsGeek |
| 343259 | Element, air cleaner | 1 | Air filter | PartsGeek |
| 343473 | Sender, oil pressure | 1 | Sensor | PartsGeek |
| 347270 | Sensor, low coolant (serial 363369 and after) | 1 | Sensor | PartsGeek |
| 352102 | Hose, upper radiator | 1 | Hose | PartsGeek |
| 352192 | Hose, upper radiator | 1 | Hose | PartsGeek |
| 352193 | Hose, lower radiator | 1 | Hose | PartsGeek |
| 352335 | Hose | 1 | Hose | PartsGeek |
| 352337 | Switch, sensor (water temp.) | 1 | Sensor | PartsGeek |
| 352505 | Switch, sensor (water temp.) | 1 | Sensor | PartsGeek |
| 352522 | Hose, upper radiator | 1 | Hose | PartsGeek |
| 352523 | Hose, lower radiator | 1 | Hose | PartsGeek |
| 352910 | Hose, 3 x 2.25 | 1 | Hose | PartsGeek |
| 364020 | Hose, air intake | 1 | Hose | PartsGeek |
| 364027 | Hose, oil (upper) | 1 | Hose | PartsGeek |
| 364028 | Hose, oil (lower) | 1 | Hose | PartsGeek |
| 364031 | Hose, air intake | 1 | Hose | PartsGeek |
| 364064 | Hose, air intake | 1 | Hose | PartsGeek |
| 364070 | O-ring | 1 | Seal | PartsGeek |
| 364189 | Hose, breather | 1 | Hose | PartsGeek |
| 364231 | Hose, air intake | 1 | Hose | PartsGeek |
| 364232 | Hose, breather | 1 | Hose | PartsGeek |
| 364236 | Hose, reducer | 1 | Hose | PartsGeek |
| 364238 | Hose, air intake HD | 1 | Hose | PartsGeek |
| 364276 | Hose, air intake | 1 | Hose | PartsGeek |
| 364514 | Line, flexible fuel | 1 | Hose | PartsGeek |
| 365289 | Sensor, low fluid | 1 | Sensor | PartsGeek |
| A-233999 | Heat sink | 1 | Heat sink | PartsGeek |
| A-253104 | Air cleaner assembly | 1 | Air filter | PartsGeek |
| A-273699 | Air Cleaner Assembly | 1 | Air filter | PartsGeek |
| A-273700 | Air cleaner | 1 | Air filter | PartsGeek |
| A-324131 | Air Cleaner Assembly, variation 4) | 1 | Air filter | PartsGeek |
| A-324204 | Air Cleaner Assembly, variation 5) | 1 | Air filter | PartsGeek |
| A-324305 | Air Cleaner Assembly, variation 1) | 1 | Air filter | PartsGeek |
| A-324434 | Air Cleaner Assembly, variation 6) | 1 | Air filter | PartsGeek |
| B-258545 | Heat sink | 1 | Heat sink | PartsGeek |
| GM10020 | Hose, air intake | 1 | Hose | PartsGeek |
| GM10021 | Hose, reducer | 1 | Hose | PartsGeek |
| GM10170 | Hose, air intake HD | 1 | Hose | PartsGeek |
| GM10580 | Hose, molded air intake (std) | 1 | Hose | PartsGeek |
| GM10581 | Hose, air intake HD | 1 | Hose | PartsGeek |
| GM10582 | Hose, breather | 1 | Hose | PartsGeek |
| GM10633 | Hose, upper radiator (50.0 mm ID) | 1 | Hose | PartsGeek |
| GM10634 | Hose, lower radiator (50.0 mm ID) | 1 | Hose | PartsGeek |
| GM10635 | Hose, upper charge cooler (76.0 mm ID) | 1 | Hose | PartsGeek |
| X-312-41 | Hose, bypass (thermostat) | 1 | Hose | PartsGeek |
| X-373-10 | Hose, 3/4 ID x 66 in. | 1 | Hose | PartsGeek |
| X-373-11 | Hose, 3/4 ID x 60 in. | 1 | Hose | PartsGeek |
| X-373-12 | Hose, 3/4 ID x 78 in. (early) | 1 | Hose | PartsGeek |
| X-373-13 | Hose | 1 | Hose | PartsGeek |
| X-422-26 | Hose, bypass (thermostat) | 1 | Hose | PartsGeek |
| X-468-3 | Tie, cable | 1 | Tie | PartsGeek |
| X-507-1 | Hose, reducer 2.5 ID x 2.25 ID | 1 | Hose | PartsGeek |
| X-527-9 | Hose, radiator | 1 | Hose | PartsGeek |
| X-577-38 | Hose, oil-proof | 1 | Hose | PartsGeek |
| X-577-47 | Hose, oil-proof | 1 | Hose | PartsGeek |
| X-577-8 | Hose, oil-proof | 1 | Hose | PartsGeek |
| X-577-9 | Hose, oil-proof | 1 | Hose | PartsGeek |
| X-6350-1 | Hose | 1 | Hose | PartsGeek |
| X-6359-13 | Hose, rubber | 1 | Hose | PartsGeek |
| 2225227 | Controller Ribbon Cable | 1 | Service part / kit | PartsGeek |
| 2225327 | Controller Ribbon Cable | 1 | Service part / kit | PartsGeek |
| 223316 | Fuse, 10 A, 250 V | 5 | Service part / kit | PartsGeek |
| 223488 | piston pin | 4 | Service part / kit | Amazon eBay $104.95 PartsGeek |
| 224357 | Cap, radiator 7 psi (48 kPa), 3.16 in. | 1 | Service part / kit | PartsGeek |
| 224358 | Cap, radiator (7 psi) | 1 | Service part / kit | PartsGeek |
| 238736 | Voltmeter | 1 | Service part / kit | PartsGeek |
| 243273 | Fuse, 3 amp | 5 | Service part / kit | PartsGeek |
| 243321 | Washer, insulating | 1 | Service part / kit | PartsGeek |
| 253329 | DC Voltmeter | 1 | Service part / kit | PartsGeek |
| 255126 | Bulb (lamp no. 1892) | 1 | Service part / kit | PartsGeek |
| 257020 | Fan, generator | 1 | Service part / kit | PartsGeek |
| 257077 | Actuator, magnetic | 1 | Service part / kit | PartsGeek |
| 257080 | Exciter assembly | 1 | Service part / kit | PartsGeek |
| 257081 | Exciter assembly | 1 | Service part / kit | PartsGeek |
| 257168 | Stator, Wound | 1 | Service part / kit | PartsGeek |
| 257173 | Fan, generator | 1 | Service part / kit | PartsGeek |
| 257569 | Exciter assembly, field | 1 | Service part / kit | PartsGeek |
| 257855 | Fan, generator | 1 | Service part / kit | PartsGeek |
| 257963 | Exciter assembly, field | 1 | Service part / kit | PartsGeek |
| 259391 | Relay | 1 | Service part / kit | PartsGeek |
| 272701 | Valve, oil drain | 1 | Service part / kit | PartsGeek |
| 273716 | Solenoid, fuel shutoff | 1 | Service part / kit | PartsGeek |
| 276691 | Block Heater | 1 | Service part / kit | PartsGeek |
| 276941 | Governor throttle kit (replaces governor ball joint linkage) | 1 | Service part / kit | PartsGeek |
| 282800 | AC Ammeter | 1 | Service part / kit | PartsGeek |
| 282801 | AC Ammeter | 1 | Service part / kit | PartsGeek |
| 282802 | AC Ammeter | 1 | Service part / kit | PartsGeek |
| 282803 | AC Ammeter | 1 | Service part / kit | PartsGeek |
| 282804 | AC Ammeter | 1 | Service part / kit | PartsGeek |
| 282805 | AC Ammeter | 1 | Service part / kit | PartsGeek |
| 282806 | AC Ammeter | 1 | Service part / kit | PartsGeek |
| 282807 | AC Ammeter | 1 | Service part / kit | PartsGeek |
| 282808 | AC Ammeter | 1 | Service part / kit | PartsGeek |
| 282816 | *Voltmeter, AC | 1 | Service part / kit | PartsGeek |
| 282817 | AC Voltmeter | 1 | Service part / kit | PartsGeek |
| 282818 | *Meter, Frequency | 1 | Service part / kit | PartsGeek |
| 282898 | Strip, terminal (9-terminal) | 1 | Service part / kit | PartsGeek |
| 283645 | Fuse, 15 amp | 5 | Service part / kit | PartsGeek |
| 2882622 | 6-Light Controller | 1 | Service part / kit | PartsGeek |
| 291207 | Fuse, 1.5 amp | 5 | Service part / kit | PartsGeek |
| 291269 | Heater, strip (anti-condensation) | 2 | Service part / kit | PartsGeek |
| 291740 | Rectifier or Coil | 1 | Service part / kit | PartsGeek |
| 295069 | Meter, frequency | 1 | Service part / kit | PartsGeek |
| 326228 | Block Heater | 1 | Service part / kit | PartsGeek |
| 347715 | Cap, radiator 9 psi (62 kPa) | 1 | Service part / kit | PartsGeek |
| 352565 | AC Ammeter | 1 | Service part / kit | PartsGeek |
| A-2225215 | Main Circuit Board | 1 | Service part / kit | PartsGeek |
| A-2225220 | Indicator Board | 1 | Service part / kit | PartsGeek |
| A-2225321 | Main Circuit Board | 1 | Service part / kit | PartsGeek |
| A-2225323 | Indicator Board | 1 | Service part / kit | PartsGeek |
| A-255041 | Potentiometer Assembly | 1 | Service part / kit | PartsGeek |
| A-257099 | Circuit board, FR-II activator | 1 | Service part / kit | PartsGeek |
| A-257516 | Rotor | 1 | Service part / kit | PartsGeek |
| A-257517 | Rotor | 1 | Service part / kit | PartsGeek |
| A-257518 | Rotor | 1 | Service part / kit | PartsGeek |
| A-257519 | Rotor | 1 | Service part / kit | PartsGeek |
| A-257520 | Rotor | 1 | Service part / kit | PartsGeek |
| A-258913 | Rotor | 1 | Service part / kit | PartsGeek |
| A-258975 | Rotor | 1 | Service part / kit | PartsGeek |
| A-258976 | Rotor | 1 | Service part / kit | PartsGeek |
| A-258977 | Rotor | 1 | Service part / kit | PartsGeek |
| A-258978 | Rotor | 1 | Service part / kit | PartsGeek |
| A-258979 | Rotor | 1 | Service part / kit | PartsGeek |
| A-258980 | Rotor | 1 | Service part / kit | PartsGeek |
| A-258981 | Rotor | 1 | Service part / kit | PartsGeek |
| A-336415 | Main Circuit Board | 1 | Service part / kit | PartsGeek |
| A-336430 | Indicator Board (variations 78, 79) | 1 | Service part / kit | PartsGeek |
| A-336432 | Main circuit board | 1 | Service part / kit | PartsGeek |
| B-258549 | HEATSINK ASSEMBLY | 1 | Service part / kit | PartsGeek |
| B-2842271 | 16-Light Controller | 1 | Service part / kit | PartsGeek |
| B-292357 | Indicator Board | 1 | Service part / kit | PartsGeek |
| B-292789 | Regulator assembly, voltage | 1 | Service part / kit | PartsGeek |
| B-292902 | Photo Board / Split Activator | 1 | Service part / kit | PartsGeek FridayParts $271.50 |
| C-255670 | Voltage Regulator | 1 | Service part / kit | PartsGeek |
| G-2882605 | 6-Light Controller | 1 | Service part / kit | PartsGeek |
| G-292806 | Main Circuit Board | 1 | Service part / kit | PartsGeek |
| X-101-22 | Stop Nut | 5 | Service part / kit | PartsGeek |
| X-256-3 | Valve, drain | 1 | Service part / kit | PartsGeek |
| X-256-5 | Valve, drain | 1 | Service part / kit | PartsGeek |
| X-283-7 | Terminal | 1 | Service part / kit | PartsGeek |
| X-545-100 | Cable, battery | 1 | Service part / kit | PartsGeek |
| X-545-101 | Cable, battery | 1 | Service part / kit | PartsGeek |
| X-545-111 | Cable, battery | 1 | Service part / kit | PartsGeek |
| X-545-132 | Cable, battery | 1 | Service part / kit | PartsGeek |
| X-545-97 | Cable, battery | 1 | Service part / kit | PartsGeek |
| X-545-99 | Cable, battery | 1 | Service part / kit | PartsGeek |
| X-57-60 | Breaker, circuit | 1 | Service part / kit | PartsGeek |
| X-758-2 | Bearing, ball | 1 | Service part / kit | PartsGeek |
| X-758-6 | Bearing, ball | 1 | Service part / kit | PartsGeek |
| X-758-9 | Bearing, ball (4UAW) | 1 | Service part / kit | PartsGeek |
| X-796-1 | Breaker, circuit | 1 | Service part / kit | PartsGeek |
| X-796-2 | Breaker, circuit | 1 | Service part / kit | PartsGeek |
| X-796-3 | Breaker, circuit | 1 | Service part / kit | PartsGeek |
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.
Fuel consumption
| Rating | Load | L/h | gal/h |
|---|---|---|---|
| Prime | 25% | 4.5 | 1.2 |
| Prime | 50% | 7.2 | 1.9 |
| Prime | 75% | 9.8 | 2.6 |
| Prime | 100% | 11.7 | 3.1 |
| Standby | 25% | 6.1 | 1.6 |
| Standby | 50% | 8.7 | 2.3 |
| Standby | 75% | 12.1 | 3.2 |
| Standby | 100% | 16.3 | 4.3 |
Available documents
Spec sheet — Kohler 50rozj spec sheet (Kohler)Reference — sb535 (Kohler)Parts manual — pb54 (Kohler)Parts manual — tp5408 (Kohler)Parts manual — tp5681 (Kohler)Parts manual — tp6029 (Kohler)Service manual — tp5851 (Kohler)Service manual — tt695 (Kohler)