Service parts for the 125REOZJG
Grouped by system, with how many of each the parts manual calls for.
Fuel system
2 requiredOil system
1 requiredBelts
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 | 125 kW |
| Standby kVA | 156 |
| Prime power | 114 kW |
| Emissions | Tier 3 EPA-Certified |
| Controller | Decision-Maker 3000 |
| Oil capacity | 13.9 L |
| Alternator | 4R12X |
| Voltage options | 120/208 V, 127/220 V, 120/240 V, 139/240 V, 220/380 V, 277/480 V, 347/600 V |
| Phase | 3 |
| Rated current | 188 A |
| Power factor | 0.8 |
| Battery cranking | 800 CCA |
| Battery voltage | 12 V |
| Battery quantity | 1 |
| Coolant capacity | 19.2 L |
| Max ambient | 50 °C |
| Dimensions (L×W×H) | 2700×1120×1527 mm |
| Dry weight | 1226 kg |
Engine
| Oil capacity | 13.9 L |
|---|---|
| Coolant capacity | 19.2 L |
| Displacement | 4.5 L |
| Aspiration | Turbocharged, Charge Air-Cooled |
| Rated speed | 1800 rpm |
Maintenance & consumables
for the John Deere 4045HF285K| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Dry | — | |||
| Fuel filter | — | ||||
| Fuel filter | Primary | GM50074 | Amazon $76.45 eBay $70.33 | ||
| Fuel filter | Secondary | GM50006 | Amazon $23.99 eBay $26.99 | ||
| Oil filter | Cartridge | ×1 | GM32809 | Amazon $57.96 eBay $26.25 | |
| Belt | 352793 | Amazon eBay $106.79 | |||
| Oil | 12.0 L | — |
Compatible filters for the John Deere 4045HF285K — cross-referenced via Donaldson. Options to verify against your serial number, not confirmed for this exact unit.
- Air filter: John Deere AL204809 John Deere AT390262 John Deere AT390261 John Deere AL119839 John Deere AL150285
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.
Common questions
What is the power rating of the Kohler 125REOZJG?
The Kohler 125REOZJG is rated 125 kW standby (156.0 kVA).
What engine does the Kohler 125REOZJG use?
The Kohler 125REOZJG is powered by the John Deere 4045HF285K engine.
Is the Kohler 125REOZJG diesel or gas?
The Kohler 125REOZJG runs on Diesel.
What's the oil capacity on a Kohler 125REOZJG?
The John Deere 4045HF285K engine in the Kohler 125REOZJG has an oil capacity of 13.9 liters.
What alternator comes on the Kohler 125REOZJG?
The Kohler 125REOZJG uses a 4R12X alternator.
What oil filter fits the Kohler 125REOZJG?
The Kohler 125REOZJG uses oil filter part number GM32809.
Which fuel filter part number does the Kohler 125REOZJG take?
The Kohler 125REOZJG uses fuel filter part numbers GM50074, GM50006.
What air filter does the Kohler 125REOZJG use?
The Kohler 125REOZJG uses air filter part numbers JOHN DEERE AL204809, JOHN DEERE AT390262.
Parts
24| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 352793 | Oil Filter | 1 | Oil filter | Amazon eBay $106.79 |
| C04521 | Element, Oil Filter | Oil filter | Amazon eBay | |
| CO2775 | Element, Fuel Water Separator | Fuel filter | Amazon eBay | |
| CO2776 | Element, Fuel Filter Primary | Fuel filter | Amazon eBay | |
| G030071 | Air Cleaner Element (Engine) Secondary | Air filter | Amazon eBay | |
| G030073 | Air Cleaner Element (Engine) Primary | Air filter | Amazon eBay | |
| G030074 | Air Cleaner Element (Engine) Secondary | Air filter | Amazon eBay | |
| G122208 | Clarke Eng Fluid - 5 gal | Fluid | Amazon eBay | |
| G122209 | Clarke Eng Fluid -1 gal | Fluid | Amazon eBay | |
| G30070 | Air Cleaner Element (Engine) Primary | Air filter | Amazon eBay | |
| GM32809 | Fuel Filter | 1 | Fuel filter | Amazon $57.96 eBay $26.25 |
| GM50006 | Fuel Filter | 1 | Fuel filter | Amazon $23.99 eBay $26.99 |
| GM50074 | Fuel Filter (primary) | 1 | Fuel filter | Amazon $76.45 eBay $70.33 |
| GM66704-1 | Fan Belt (12V) | 1 | Belt | Amazon eBay |
| GM66704-2 | Fan Belt (24V) | 1 | Belt | Amazon eBay |
| GM77161 | Oil Filter | 1 | Oil filter | Amazon eBay |
| G122189 | 250 hour Maintenance Kit (without fluids) | Service part / kit | Amazon eBay | |
| G122190 | 250 hour Maintenance Kit (without fluids) | Service part / kit | Amazon eBay | |
| G122194 | 250 hour Maintenance Kit (& engine fluids) | Service part / kit | Amazon eBay | |
| G122195 | 250 hour Maintenance Kit (& engine fluids) | Service part / kit | Amazon eBay | |
| G122199 | 500 hour Maintenance Kit (without fluids) | Service part / kit | Amazon eBay | |
| G122200 | 500 hour Maintenance Kit (without fluids) | Service part / kit | Amazon eBay | |
| G122204 | 500 hour Maintenance Kit (& Engine fluids) | Service part / kit | Amazon eBay | |
| G122205 | 500 hour Maintenance Kit (& Engine fluids) | Service part / kit | Amazon eBay |
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
| Rating | Load | L/h | gal/h |
|---|---|---|---|
| Prime | 25% | 10.6 | 2.8 |
| Prime | 50% | 19.5 | 5.1 |
| Prime | 75% | 26.9 | 7.1 |
| Prime | 100% | 34.8 | 9.2 |
| Standby | 25% | 11.4 | 3.0 |
| Standby | 50% | 21.1 | 5.6 |
| Standby | 75% | 29.0 | 7.6 |
| Standby | 100% | 37.4 | 9.9 |
Available documents
Spec sheet (Kohler)Spec sheet — Kohler-125REOZJG (Kohler)Spec sheet — g5361 (Kohler)Reference (Kohler)Reference — 80-125REOZJ Snow Enclosures G6145 (Kohler)Reference — G6-39 0918AZ (Kohler)Service manual — tp6798 (Kohler)Service manual — tp7138 (Kohler)Service manual — tp7149 (Kohler)Service manual — tt1649 (Kohler)