Service parts for the 20REOZJ
Grouped by system, with how many of each the parts manual calls for.
Fuel system
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
| Fuel | diesel |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 27 kW |
| Standby kVA | 34 |
| Prime power | 24 kW |
| Emissions | Tier 4i |
| Alternator | Fast-Response PMG (Class Class H insulation) |
| Voltage options | 480 V |
| Phase | 3-phase |
Maintenance & consumables
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Fuel filter | Primary | 223414 | Amazon eBay $13.45 NAPA $34.79 |
Service specifications
30| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Other | 10 in. weld flange bolt circle diameter B | 361.95 | mm (14.25 in.) | |
| Other | 10 in. weld flange outside diameter C | 406.4 | mm (16.0 in.) | |
| Other | 10 in. weld flange quantity of bolts / bolt hole diameter D | 12, 25.40 | mm (1.00 in.) | |
| Other | 12 in. weld flange bolt circle diameter B | 431.80 | mm (17.00 in.) | |
| Other | 12 in. weld flange outside diameter C | 482.6 | mm (19.0 in.) | |
| Other | 12 in. weld flange quantity of bolts / bolt hole diameter D | 12, 25.40 | mm (1.00 in.) | |
| Other | 14 in. weld flange bolt circle diameter B | 476.25 | mm (18.75 in.) | |
| Other | 14 in. weld flange outside diameter C | 533.4 | mm (21.0 in.) | |
| Other | 14 in. weld flange quantity of bolts / bolt hole diameter D | 12, 28.58 | mm (1.13 in.) | |
| Other | 16 in. weld flange bolt circle diameter B | 539.75 | mm (21.25 in.) | |
| Other | 16 in. weld flange outside diameter C | 596.9 | mm (23.5 in.) | |
| Other | 16 in. weld flange quantity of bolts / bolt hole diameter D | 16, 28.58 | mm (1.13 in.) | |
| Other | 18 in. weld flange bolt circle diameter B | 577.85 | mm (22.75 in.) | |
| Other | 18 in. weld flange outside diameter C | 635.0 | mm (25.0 in.) | |
| Other | 18 in. weld flange quantity of bolts / bolt hole diameter D | 16, 31.75 | mm (1.25 in.) | |
| Other | 20 in. weld flange bolt circle diameter B | 635.00 | mm (25.00 in.) | |
| Other | 20 in. weld flange outside diameter C | 698.5 | mm (27.5 in.) | |
| Other | 20 in. weld flange quantity of bolts / bolt hole diameter D | 20, 31.75 | mm (1.25 in.) | |
| Other | 5 in. weld flange bolt circle diameter B | 215.90 | mm (8.50 in.) | |
| Other | 5 in. weld flange outside diameter C | 241.30 | mm (9.50 in.) | |
| Other | 5 in. weld flange quantity of bolts / bolt hole diameter D | 8, 22.23 | mm (0.88 in.) | |
| Other | 6 in. weld flange bolt circle diameter B | 254.0 | mm (10.0 in.) | |
| Other | 6 in. weld flange outside diameter C | 279.4 | mm (11.0 in.) | |
| Other | 6 in. weld flange quantity of bolts / bolt hole diameter D | 8, 22.23 | mm (0.88 in.) | |
| Other | 8 in. weld flange bolt circle diameter B | 298.45 | mm (11.75 in.) | |
| Other | 8 in. weld flange outside diameter C | 342.9 | mm (13.5 in.) | |
| Other | 8 in. weld flange quantity of bolts / bolt hole diameter D | 8, 22.23 | mm (0.88 in.) | |
| Other | Weld flange angle A (10, 12, 14 in. nominal pipe size) | 30 | deg. | |
| Other | Weld flange angle A (16, 18, 20 in. nominal pipe size) | 22.5 | deg. | |
| Other | Weld flange angle A (5, 6, 8 in. nominal pipe size) | 45 | deg. |
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
| Voltage | Phase | Connection | Leads | Notes |
|---|---|---|---|---|
| 12-lead optional voltage connections | 12 | Alternator optional feature | ||
| 4-lead dedicated voltages | 4 | Alternator standard feature | ||
| 110/127/139/240/254/277 | single-phase | switchable | Towable generator model specifications; some models n/a | |
| 208/220/240/415/440/480 | 3-phase | reconnectable | Towable generator model specifications | |
| 208/220/240/415/440/480 | 3-phase | switchable | Towable 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
What size generator is the Kohler 20REOZJ?
The Kohler 20REOZJ is rated 27 kW standby (34.0 kVA).
What fuel does the Kohler 20REOZJ use?
The Kohler 20REOZJ runs on diesel.
What is the prime power rating of the Kohler 20REOZJ?
The Kohler 20REOZJ is rated 24 kW prime (30 kVA), against 27 kW standby.
What voltages is the Kohler 20REOZJ available in?
The Kohler 20REOZJ is offered in 480 V, 3-phase-phase.
What alternator comes on the Kohler 20REOZJ?
The Kohler 20REOZJ uses a Fast-Response PMG alternator. Insulation class Class H.
What fuel filter does the Kohler 20REOZJ use?
The Kohler 20REOZJ uses fuel filter part number 223414.
Parts
155model family| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 222337 | Air Cleaner, Heavy Duty | 1 | Air filter | buy |
| 222338 | Air Cleaner, Heavy Duty | 1 | Air filter | buy |
| 223595 | Thermostat | 1 | Thermostat | eBay |
| 223604 | Filter, oil | 1 | Oil filter | Amazon eBay $13.00 |
| 223626 | Gasket | 1 | Gasket | buy |
| 223640 | Belt, 11/16 x 49 1/2 in. | 1 | Belt | Amazon eBay $149.99 |
| 223673 | Filter, oil | 1 | Oil filter | Amazon eBay $26.99 NAPA $35.41 KuduParts $14.00 |
| 223676 | Thermostat | 1 | Thermostat | Amazon eBay |
| 223762 | Thermostat Gasket | 1 | Gasket | buy |
| 223941 | Injector | 1 | Injector | buy |
| 223953 | Filter, fuel | 1 | Fuel filter | Amazon eBay $80.00 NAPA $56.25 |
| 223959 | Fan Belt | 1 | Belt | Amazon eBay |
| 223965 | Injector | 1 | Injector | buy |
| 224012 | Gasket | 1 | Gasket | Amazon eBay |
| 224171 | Injector | 1 | Injector | buy |
| 224256 | Fan Belt | 1 | Belt | Amazon eBay $29.99 |
| 224263 | Belt set (matched set of 2) | 1 | Belt | Amazon eBay $20.00 |
| 224299 | Injector | 1 | Injector | buy |
| 224795 | Filter, fuel (round) | 1 | Fuel filter | Amazon eBay |
| 241308 | Switch, high temperature | 1 | Sensor | Amazon eBay $182.00 |
| 241481 | Switch, high temperature 268298 Sender, water temperature | 1 | Sensor | Amazon eBay |
| 241623 | Sensor, ferromagnetic | 1 | Sensor | Amazon eBay |
| 241927 | Sensor, speed | 1 | Sensor | Amazon eBay $75.00 |
| 253107 | Element, Air Cleaner | 1 | Air filter | Amazon eBay $69.00 NAPA $55.23 |
| 253108 | Element, air cleaner | 1 | Air filter | Amazon eBay $71.99 |
| 254477 | Element, air cleaner | 1 | Air filter | Amazon eBay $59.99 |
| 254832 | Coolant Level Sensor (serial 363369 and after) | 1 | Sensor | buy |
| 255520 | Hose, reducer | 1 | Hose | Amazon eBay FridayParts $33.99 |
| 258883 | Cleaner assembly, air | 1 | Air filter | buy |
| 265461 | Line, flex. fuel, 18” | 1 | Hose | Amazon eBay |
| 268298 | Sender, water temperature | 1 | Sensor | Amazon eBay |
| 268371 | Alternator Assembly | 1 | Alternator | buy |
| 269373 | Alternator Assembly | 1 | Alternator | Amazon eBay |
| 273417 | Hose, upper radiator | 1 | Hose | Amazon eBay |
| 273418 | Hose, lower radiator | 1 | Hose | Amazon eBay |
| 273442 | Hose, hump 3 id x 5 1/2 | 1 | Hose | buy |
| 273443 | Hose, lower radiator | 1 | Hose | buy |
| 273444 | Hose, upper radiator | 1 | Hose | Amazon |
| 273462 | Hose, upper radiator | 1 | Hose | buy |
| 273520 | Sensor, low coolant | 1 | Sensor | Amazon eBay |
| 273692 | Adapter, water temperature sensor | 1 | Sensor | Amazon eBay |
| 273693 | O-ring, 1.475 ID x 0.118 in. rubber | 1 | Seal | Amazon eBay |
| 273758 | Pickup, RPM | 1 | Sensor | buy |
| 273777 | Hose, lower radiator | 1 | Hose | Amazon |
| 273930 | Hose, lower radiator | 1 | Hose | buy |
| 276574 | Hose, molded | 1 | Hose | Amazon |
| 282897 | Gauge, oil pressure | 1 | Sensor | Amazon eBay $20.00 |
| 291891 | Solenoid, starter | 1 | Starter | Amazon eBay $42.81 |
| 328006 | Hose, reducer (3.00 in. to 2.50 in. ID) | 1 | Hose | Amazon eBay |
| 328308 | Pressure Switch | 1 | Sensor | buy |
| 328309 | Switch assembly, pressure (oil pressure) | 1 | Sensor | Amazon eBay $45.00 |
| 336101 | Hose, upper radiator | 1 | Hose | buy |
| 336445 | Thermostat Gasket | 1 | Gasket | buy |
| 336545 | Fuel Filter | 1 | Fuel filter | Amazon eBay |
| 336923 | Switch, high temperature shutdown | 1 | Sensor | buy |
| 343473 | Sender, oil pressure | 1 | Sensor | eBay |
| 347270 | Sensor, low coolant (serial 363369 and after) | 1 | Sensor | buy |
| 352102 | Hose, upper radiator | 1 | Hose | buy |
| 352192 | Hose, upper radiator | 1 | Hose | buy |
| 352193 | Hose, lower radiator | 1 | Hose | buy |
| 352335 | Hose | 1 | Hose | buy |
| 352337 | Switch, sensor (water temp.) | 1 | Sensor | buy |
| 352505 | Switch, sensor (water temp.) | 1 | Sensor | buy |
| 352522 | Hose, upper radiator | 1 | Hose | buy |
| 352523 | Hose, lower radiator | 1 | Hose | buy |
| 352910 | Hose, 3 x 2.25 | 1 | Hose | buy |
| A-233999 | Heat sink | 1 | Heat sink | buy |
| A-253104 | Air cleaner assembly | 1 | Air filter | Amazon Amazon eBay eBay |
| A-273699 | Air Cleaner Assembly | 1 | Air filter | Amazon Amazon eBay eBay |
| A-273700 | Air cleaner | 1 | Air filter | buy |
| B-258545 | Heat sink | 1 | Heat sink | buy |
| X-312-41 | Hose, 5/8 x 4.5 in. | 1 | Hose | buy |
| X-373-10 | Hose, 3/4 ID x 66 in. | 1 | Hose | buy |
| X-373-11 | Hose, 3/4 ID x 60 in. | 1 | Hose | buy |
| X-373-12 | Hose, 3/4 ID x 78 in. (early) | 1 | Hose | buy |
| X-373-13 | Hose | 1 | Hose | buy |
| X-422-26 | Hose, bypass (thermostat) | 1 | Hose | buy |
| X-507-1 | Hose, reducer 2.5 ID x 2.25 ID | 1 | Hose | buy |
| X-577-38 | Hose, 0.625 in. ID x 20 in. | 1 | Hose | buy |
| X-577-47 | Hose, oil-proof | 1 | Hose | buy |
| X-577-8 | Hose, oil-proof | 1 | Hose | buy |
| X-577-9 | Hose, oil-proof | 1 | Hose | buy |
| X-6350-1 | Hose | 1 | Hose | buy |
| 223316 | Fuse, 10 A, 250 V | 1 | Service part / kit | Amazon eBay $31.37 |
| 224357 | Cap, radiator 7 psi (48 kPa), 3.16 in. | 1 | Service part / kit | buy |
| 224358 | Cap, radiator (7 psi) | 1 | Service part / kit | Amazon eBay |
| 238736 | Voltmeter | 1 | Service part / kit | Amazon eBay $549.00 |
| 241062 | Plug, drain | 1 | Service part / kit | Amazon eBay $24.00 |
| 243273 | Fuse, 3 amp | 5 | Service part / kit | Amazon eBay |
| 253329 | DC Voltmeter | 1 | Service part / kit | eBay |
| 255126 | Bulb (lamp no. 1892) | 1 | Service part / kit | Amazon eBay |
| 257020 | Fan, generator | 1 | Service part / kit | eBay $13.92 |
| 257077 | Actuator, magnetic | 1 | Service part / kit | eBay |
| 257080 | Exciter assembly | 1 | Service part / kit | eBay $205.23 |
| 257081 | Exciter assembly | 1 | Service part / kit | eBay |
| 257173 | Fan, generator | 1 | Service part / kit | eBay |
| 257569 | Exciter assembly, field | 1 | Service part / kit | buy |
| 257855 | Fan, generator | 1 | Service part / kit | eBay |
| 257963 | Exciter assembly, field | 1 | Service part / kit | buy |
| 259391 | Relay | 1 | Service part / kit | Amazon eBay $53.76 |
| 272701 | Valve, oil drain | 1 | Service part / kit | Amazon eBay |
| 273404 | Switch assembly, level (includes 47, 48 and 49) | 1 | Service part / kit | Amazon eBay |
| 273463 | Plug, 1-5/8–12 class 2A str. thd., 1/2–14 NPT tap | 1 | Service part / kit | Amazon eBay |
| 273716 | Solenoid, fuel shutoff | 1 | Service part / kit | buy |
| 276691 | Block Heater | 1 | Service part / kit | Amazon eBay |
| 276941 | Governor throttle kit (replaces governor ball joint linkage) | 1 | Service part / kit | Amazon eBay |
| 280133 | Cable, jumper | 1 | Service part / kit | buy |
| 282800 | AC Ammeter | 1 | Service part / kit | buy |
| 282801 | AC Ammeter | 1 | Service part / kit | buy |
| 282802 | AC Ammeter | 1 | Service part / kit | buy |
| 282803 | AC Ammeter | 1 | Service part / kit | buy |
| 282804 | AC Ammeter | 1 | Service part / kit | buy |
| 282805 | AC Ammeter | 1 | Service part / kit | buy |
| 282806 | AC Ammeter | 1 | Service part / kit | buy |
| 282807 | AC Ammeter | 1 | Service part / kit | buy |
| 282808 | AC Ammeter | 1 | Service part / kit | buy |
| 282814 | Alternator Assembly | 1 | Service part / kit | eBay |
| 282816 | *Voltmeter, AC | 1 | Service part / kit | buy |
| 282817 | AC Voltmeter | 1 | Service part / kit | buy |
| 282818 | *Meter, Frequency | 1 | Service part / kit | buy |
| 282898 | Strip, terminal (9-terminal) | 1 | Service part / kit | eBay |
| 283645 | Fuse, 15 Amp | 5 | Service part / kit | Amazon eBay |
| 291207 | Fuse, 1.5 amp | 1 | Service part / kit | Amazon eBay |
| 291269 | Heater, strip (anti-condensation) | 2 | Service part / kit | buy |
| 291740 | Rectifier or Coil | 1 | Service part / kit | Amazon eBay |
| 295069 | Meter, frequency | 1 | Service part / kit | Amazon eBay |
| 326228 | Block Heater | 1 | Service part / kit | Amazon eBay NAPA $75.00 |
| 347715 | Cap, radiator 9 psi (62 kPa) | 1 | Service part / kit | buy |
| 352565 | AC Ammeter | 1 | Service part / kit | buy |
| A-255041 | Potentiometer assembly | 1 | Service part / kit | eBay |
| A-257099 | Circuit board, FR-II activator | 1 | Service part / kit | Amazon eBay |
| A-336415 | Controller Includes * *Circuit Board, Dec-3+ Main | 1 | Service part / kit | buy |
| A-336430 | Indicator Board (variations 78, 79) | 1 | Service part / kit | buy |
| A-336432 | Main circuit board | 1 | Service part / kit | Amazon eBay $199.95 |
| B-258549 | HEATSINK ASSEMBLY | 1 | Service part / kit | buy |
| B-292357 | Indicator Board | 1 | Service part / kit | Amazon eBay |
| B-292789 | Regulator assembly, voltage | 1 | Service part / kit | buy |
| B-292902 | Photo Board / Split Activator | 1 | Service part / kit | Amazon eBay FridayParts $271.50 |
| C-255670 | Voltage Regulator | 1 | Service part / kit | Amazon eBay |
| G-292806 | Main Circuit Board | 1 | Service part / kit | Amazon eBay $550.00 |
| X-256-3 | Valve, drain | 1 | Service part / kit | Amazon eBay |
| X-256-5 | Valve, drain | 1 | Service part / kit | Amazon eBay |
| X-545-100 | Cable, battery | 1 | Service part / kit | buy |
| X-545-101 | Cable, battery | 1 | Service part / kit | buy |
| X-545-111 | Cable, battery | 1 | Service part / kit | buy |
| X-545-132 | Cable, battery | 1 | Service part / kit | buy |
| X-545-97 | Cable, battery | 1 | Service part / kit | buy |
| X-545-99 | Cable, battery | 1 | Service part / kit | buy |
| X-57-60 | Breaker, circuit | 1 | Service part / kit | buy |
| X-758-2 | Bearing, ball | 1 | Service part / kit | Amazon eBay $83.65 |
| X-758-6 | Bearing, ball | 1 | Service part / kit | Amazon eBay $50.00 |
| X-758-9 | Bearing, ball (4UAW) | 1 | Service part / kit | eBay |
| X-796-1 | Breaker, circuit (Kits PA-255127 and PA-255127-SD) | 1 | Service part / kit | buy |
| X-796-2 | Breaker, circuit (Kits PA-255130 and PA-255130-SD) | 1 | Service part / kit | buy |
| X-796-3 | Breaker, circuit (Kits PA-255131 and PA-255131-SD) | 1 | Service part / kit | buy |
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
Reference — G6-39 0918AZ (Kohler)Reference — Katalog-promyshlennoj-produktsii (Kohler)Parts manual — tp5408 (Kohler)Service manual — tp5851 (Kohler)Service manual — tp6798 (Kohler)
This page was generated from the 5 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.