Service parts for the 125REOZJ4
Grouped by system, with how many of each the parts manual calls for.
Air intake
1 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 | 130 kW |
| Standby kVA | 163 |
| Prime power | 117 kW |
| Emissions | Tier 4 Final |
| Controller | Decision-Maker 3500 |
| Oil capacity | 15.6 L |
| Alternator | 4R13X (4-pole, Class H insulation) |
| Voltage options | 120/208 V, 120/240 V, 277/480 V, 347/600 V |
| Phase | 3 |
| Power factor | 0.8 |
| Circuit breaker | 600 A |
| Battery cranking | 400 CCA |
| Battery voltage | 12 V |
| Battery quantity | 2 |
| Coolant capacity | 35.6 L |
| Max ambient | 50 °C |
| Dimensions (L×W×H) | 3531×1191×2276 mm |
| Dry weight | 3501 kg |
| Sound level | 70.0 dBA @ 7 m |
| Fuel tank | 923.0 L |
| Tank runtime | 24 hr |
Engine
| Oil capacity | 28.5 L |
|---|---|
| Coolant capacity | 35.6 L |
| Displacement | 6.8 L |
| Aspiration | Turbocharged, Charge Air Cooled |
| Rated speed | 1800 rpm |
Maintenance & consumables
for the John Deere 6068HFG08| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Air Cleaner | GM90735 | Amazon eBay | ||
| Fuel filter | Primary | — | |||
| Oil filter | OIL FILTER (5970) (5975) | RE539279 | Amazon $34.99 eBay $15.00 KuduParts $27.00 | ||
| Belt | FAN BELT; LGTH = 1715 mm (2492) (24LN) | DZ118786 | Amazon eBay |
Common questions
What size generator is the Kohler 125REOZJ4?
The Kohler 125REOZJ4 is rated 130 kW standby (163.0 kVA).
What engine does the Kohler 125REOZJ4 use?
The Kohler 125REOZJ4 is powered by the John Deere 6068HFG08 engine.
What fuel does the Kohler 125REOZJ4 use?
The Kohler 125REOZJ4 runs on Diesel.
What is the oil capacity of the Kohler 125REOZJ4?
The John Deere 6068HFG08 engine in the Kohler 125REOZJ4 has an oil capacity of 28.5 liters.
What alternator comes on the Kohler 125REOZJ4?
The Kohler 125REOZJ4 uses a 4R13X alternator. It has 4 poles. Insulation class H.
What oil filter fits the Kohler 125REOZJ4?
The Kohler 125REOZJ4 uses oil filter part number RE539279.
What fuel filter fits the Kohler 125REOZJ4?
The Kohler 125REOZJ4 uses fuel filter part numbers KOHLER GM50006, KOHLER GM48727.
Which air filter part number does the Kohler 125REOZJ4 take?
The Kohler 125REOZJ4 uses air filter part number GM90735.
Parts
58| Part # | Description | Qty | System | |
|---|---|---|---|---|
| DZ110083 | STARTER | 1 | Starter | Amazon eBay |
| DZ112918 | SECONDARY FUEL FILTER | 1 | Fuel filter | Amazon $40.99 eBay $117.99 FridayParts $62.20 |
| DZ114640 | DOSING UNIT PUMP FILTER | 1 | Pump | Amazon $14.99 eBay $17.65 FridayParts $14.30 |
| DZ115392 | SECONDARY FILTER ELEMENT (35E6) | Filter | Amazon eBay $29.95 KuduParts $43.00 | |
| DZ118556 | FAN BELT | 1 | Belt | Amazon eBay |
| DZ118557 | FAN BELT | Belt | Amazon eBay | |
| DZ118558 | FAN BELT | Belt | Amazon eBay $85.00 | |
| DZ118559 | FAN BELT | (LGTH = 1700 MM) | Belt | Amazon eBay $55.53 |
| DZ118560 | FAN BELT | Belt | Amazon eBay | |
| DZ118561 | FAN BELT; LGTH = 1750 mm (24JX) | Belt | Amazon eBay $41.99 | |
| DZ118786 | (LGTH=1715 mm) (24GL) | 1 | Belt | Amazon eBay |
| DZ121128 | FAN BELT; LGTH = 1725 mm (24JW) | Belt | Amazon eBay | |
| DZ121129 | FAN BELT | Belt | Amazon eBay | |
| DZ121133 | FAN BELT | Belt | Amazon eBay | |
| DZ123153 | ALTERNATOR | 1 | Alternator | Amazon $369.48 eBay $299.00 |
| DZ128543 | PRIMARY FUEL FILTER | 1 | Fuel filter | Amazon eBay $44.95 KuduParts $24.00 |
| GM90735 | Air Cleaner | 1 | Air filter | Amazon eBay |
| GM91358 | Element, Air Cleaner | 1 | Air filter | Amazon eBay |
| GM91647 | Hose, Hump | 1 | Hose | Amazon eBay |
| GM92823 | Element, Air Cleaner Safety | 1 | Air filter | Amazon eBay |
| R522890 | FAN PULLEY | Belt | Amazon eBay | |
| RE505939 | (1321) | (OD = 188 MM) | Crankshaft pulley | Amazon eBay $199.99 |
| RE520906 | PRIMARY FUEL FILTER | Fuel filter | Amazon eBay $39.99 KuduParts $38.00 | |
| RE523501 | (STARTER MOTOR KIT, KIT, STARTER ISK) (3073) | Starter | Amazon eBay $216.60 FridayParts $285.90 | |
| RE523502 | STARTER | 1 | Starter | Amazon $210.00 eBay $213.99 FridayParts $187.69 |
| RE537508 | ALTERNATOR | Alternator | Amazon $161.13 eBay $161.13 FridayParts $257.99 | |
| RE539279 | OIL FILTER (5970) (5975) | 1 | Oil filter | Amazon $34.99 eBay $15.00 KuduParts $27.00 |
| RE541578 | CRANKSHAFT PULLEY AND DAMPER; OD = 190 mm (1343) | Fuel filter | Amazon eBay $1965.58 | |
| RE549229 | STARTER | Starter | Amazon eBay $484.01 FridayParts $189.99 | |
| RE549230 | STARTER | (24V, PA90L) | Starter | Amazon eBay $295.00 FridayParts $315.99 |
| RE550906 | ALTERNATOR | Alternator | Amazon eBay | |
| RE551637 | STARTER | Starter | Amazon eBay | |
| RE551644 | STARTER | 1 | Starter | Amazon $275.95 eBay $1245.60 FridayParts $203.00 |
| RE552251 | STARTER MOTOR (24V, 3.5KW) (30CA) | 1 | Starter | Amazon eBay |
| RE555751 | ALTERNATOR | 1 | Alternator | Amazon eBay $177.95 SinoCMP $369.00 |
| RE558675 | ALTERNATOR | (24V, 60A) | Alternator | Amazon eBay |
| RE558676 | ALTERNATOR | 1 | Alternator | Amazon $156.95 eBay $156.95 FridayParts $168.00 |
| RE558678 | ALTERNATOR | 1 | Alternator | Amazon eBay $442.80 FridayParts $310.88 |
| RE564633 | STARTER | (24V, 4KW) | Starter | Amazon $1034.64 eBay $202.95 FridayParts $315.20 |
| T282795 | FAN BELT | Belt | Amazon eBay | |
| DZ100304 | Diesel Exhaust Fluid Inline Filter | 1 | Service part / kit | Amazon eBay $84.99 |
| DZ105100 | CRANCKCASE VENT SYSTEM | 1 | Service part / kit | Amazon $31.79 eBay $90.27 KuduParts $52.00 |
| DZ105796 | OCV FILTER | 1 | Service part / kit | Amazon $31.99 eBay $47.34 |
| DZ110562 | Crankcase Vent System (USE WITH DZ113378 974G) | Service part / kit | Amazon eBay $49.99 | |
| DZ111004 | DEF TANK HEADER FILTER (25 Micron) | Service part / kit | Amazon eBay $58.00 | |
| DZ111166 | (3402) (3404) (3408) (3409) (974G) | Service part / kit | Amazon eBay | |
| DZ114695 | DEF TANK INLET SCREEN | 1 | Service part / kit | Amazon eBay |
| DZ119883 | TORSIONAL DAMPER | (OD = 350 mm) | Service part / kit | Amazon eBay |
| R113480 | FAN PULLEY | Service part / kit | Amazon eBay | |
| R128659 | FAN PULLEY | 1 | Service part / kit | Amazon $142.04 eBay |
| R128660 | FAN PULLEY | (OD = 168 MM) | Service part / kit | Amazon $142.41 eBay $72.11 FridayParts $121.60 |
| R128662 | FAN PULLEY | (OD = 203 MM) | Service part / kit | Amazon eBay $175.75 |
| R545125 | CRANKSHAFT PULLEY (OD = 188 mm) | (OD = 188 MM) | Service part / kit | Amazon eBay $349.95 |
| RE505940 | (6895) | 1 | Service part / kit | Amazon eBay |
| RE505941 | CRANKSHAFT PULLEY & DAMPER (OD = 264 mm) (1322) | Service part / kit | Amazon eBay $500.00 | |
| RE508578 | CRANKSHAFT PULLEY & DAMPER (OD = 264 mm) (1320) | Service part / kit | Amazon eBay $725.00 | |
| RE528428 | CRANKSHAFT PULLEY & DAMPER (OD = 264 mm) (1340) | Service part / kit | Amazon eBay | |
| RE57604 | DAMPER | Service part / kit | Amazon eBay $380.00 |
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
| Rating | Load | L/h | gal/h |
|---|---|---|---|
| Prime | 25% | 10.6 | 2.8 |
| Prime | 50% | 17.8 | 4.7 |
| Prime | 75% | 25.0 | 6.6 |
| Prime | 100% | 32.5 | 8.6 |
| Standby | 25% | 11.3 | 3.0 |
| Standby | 50% | 19.3 | 5.1 |
| Standby | 75% | 27.2 | 7.2 |
| Standby | 100% | 34.0 | 9.4 |
Available documents
Spec sheet — Kohler-125REOZJ4 (Kohler)Spec sheet — g5429 (Kohler)Parts manual — tp6894 (Kohler)Service manual — tp6924 (Kohler)