Service parts for the 300REOZJ
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 | 300 kW |
| Standby kVA | 375 |
| Emissions | Tier 3 |
| Controller | APM402, APM603, Decision-Maker 3000, Decision-Maker 6000 |
| Oil capacity | 33.4 L |
| Alternator | Fast-Response PMG (Class Class H insulation) |
| Voltage options | 480 V |
| Phase | 3-phase |
| Power factor | 0.8 |
| Battery cranking | 950 CCA |
| Battery voltage | 24 V |
| Battery quantity | 2 |
| Coolant capacity | 36.0 L |
| Engine jacket water | 16.0 L |
| Max ambient | 50 °C |
| Dimensions (L×W×H) | 3100×1300×1689 mm |
| Dry weight | 2449 kg |
| Wet weight | 2449 kg |
Engine
| Oil capacity | 33.4 L |
|---|---|
| Coolant capacity | 16.0 L |
| Displacement | 9.0 L |
| Aspiration | 4-Cycle, Turbocharged, Charge Air-Cooled |
| Rated speed | 1800 rpm |
Filters for the John Deere 6090HFG86
5Engine-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.
| System | Filter | Description | Cross-references | |
|---|---|---|---|---|
| Oil filter | P550938 | Lube Filter, Cartridge | JOHN DEERE RE509672, JOHN DEERE RE530656, NAPA 1370, LIEBHERR 11212420 | KuduParts $16.00 |
| Fuel filter | P550090 | Fuel Filter, In-Line | JOHN DEERE AE20952, JOHN DEERE AT101565, ASV INCORPORATED 0201914, LOESING 025125 | FridayParts $45.66 |
| Fuel filter | P502392 | Fuel Filter, Box | JOHN DEERE N378886, BALDWIN BF7912, SEPAR 01030, SEPAR 01030HV | FridayParts $39.99 |
| Fuel / water separator | P552952 | Fuel Filter, Water Separator Spin-On | JOHN DEERE DZ130550, JOHN DEERE RE532952, NAPA 3969, BALDWIN BF9866-O | FridayParts $59.99 |
| Fuel / water separator | P551858 | Fuel Filter, Water Separator Spin-On | JOHN DEERE AT365869, JOHN DEERE RE503676, NAPA 3780, BALDWIN BF1265 | FridayParts $39.00 KuduParts $48.00 |
Same engine, other brands
1 brandThe John Deere 6090HFG86 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.
| Brand | Models |
|---|---|
| MTU | 6R0150 DS300 |
Maintenance & consumables
for the John Deere 6090HFG86| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Dry | — | |||
| Fuel filter | Primary | GM50263 | Amazon eBay $99.99 | ||
| Oil filter | GM48731 | Amazon eBay $49.99 NAPA $3.59 |
Compatible filters for the John Deere 6090HFG86 — cross-referenced via Donaldson. Options to verify against your serial number, not confirmed for this exact unit.
- Air filter: John Deere RE587794 John Deere 4S00686R John Deere AH115833 John Deere F071151 John Deere F071150
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.
Recommended fluids
| Fluid | Grade | Standard | Ambient | Capacity | Notes |
|---|---|---|---|---|---|
| Engine oil | Kohler Genuine oil | Kohler recommends the use of Kohler Genuine oil and filters. | |||
| Fuel | #2 Diesel | Recommended fuel |
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 is the power rating of the Kohler 300REOZJ?
The Kohler 300REOZJ is rated 300 kW standby (375.0 kVA).
Which engine powers the Kohler 300REOZJ?
The Kohler 300REOZJ is powered by the John Deere 6090HFG86 engine.
Is the Kohler 300REOZJ diesel or gas?
The Kohler 300REOZJ runs on diesel.
What's the oil capacity on a Kohler 300REOZJ?
The John Deere 6090HFG86 engine in the Kohler 300REOZJ has an oil capacity of 33.4 liters.
How much coolant does the Kohler 300REOZJ hold?
The Kohler 300REOZJ cooling system holds 36 liters (9.5 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.
How much does the Kohler 300REOZJ weigh?
The Kohler 300REOZJ has a dry weight of 2449 kg (5399 lb).
What voltages is the Kohler 300REOZJ available in?
The Kohler 300REOZJ is offered in 480 V, 3-phase-phase.
How many cold cranking amps does the Kohler 300REOZJ require?
The Kohler 300REOZJ uses 2 batteryies, 24 V each, 950 CCA, per the manufacturer specification sheet.
Which alternator is fitted to the Kohler 300REOZJ?
The Kohler 300REOZJ uses a Fast-Response PMG alternator. Insulation class Class H.
Which oil filter part number does the Kohler 300REOZJ take?
The Kohler 300REOZJ uses oil filter part number GM48731.
What fuel filter fits the Kohler 300REOZJ?
The Kohler 300REOZJ uses fuel filter part number GM50263.
What air filter fits the Kohler 300REOZJ?
The Kohler 300REOZJ uses air filter part numbers JOHN DEERE RE587794, JOHN DEERE 4S00686R.
Parts
1model family| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 4UA10 | 15 Relay I/O Board | 1 | Battery | Amazon eBay |
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 |
|---|---|---|---|
| Standby | 25% | 26.3 | 7.0 |
| Standby | 50% | 49.7 | 13.1 |
| Standby | 75% | 67.7 | 17.9 |
| Standby | 100% | 84.1 | 22.2 |
Available documents
This page was generated from the 19 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.