The John Deere 6081 Tier II is a 8.1 L 6-cylinder turbocharged engine rated at 1800 rpm. It powers generator sets from Northern Lights, including the M175C2.
Service parts for the 6081 Tier II
The cheapest captured merchant offer per filter — see the full cross-reference below for every OEM/aftermarket option.
Oil system
1 requiredRE519987Oil filterfind
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Maintenance schedule
| Item | Spec | Capacity | Part # | Interval | |
|---|
| Air filter | | | — | 2000 hr | |
| Fuel filter | Change primary filter element (Racor) every 500 hours. Change secondary fuel filter every 1000 hours. | | — | 500 hr | |
| Oil filter | | | — | 500 hr | |
| Battery | Check electrolyte level in batteries every 250 hours. Check condition of batteries with hydrometer every 500 hours. | | — | 250 hr | |
| Belt | | | — | 500 hr | |
| Coolant | Flush cooling system at 2000 hours. Check and clean heat exchanger every 500 hours. | | — | 500 hr | |
| Coolant filter | Check cooling water level daily. Check coolant level every 250 hours. | | — | 250 hr | |
| Oil | Change engine oil and filter at 50 hours. Change oil and filter again at 100 hours. | | — | 50 hr | |
| Spark plug | Check & adjust valve clearance every 2000 hours. Check fuel injection pump every 2000 hours. | | — | 2000 hr | |
Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.
Parts cataloged across the John Deere 6081 family
27| Part # | Description | Category |
|---|
| SP18 | Check and clean gear oil cooler | batteries |
| SP17 | Check and clean gear oil cooler | battery |
| SP22 | Change oil in reverse gear | battery |
| SP25 | Change primary filter element | battery_condition |
| SP23 | Check state of charge of batteries | clutch_and_pto_service |
| SP16 | Check and clean heat exchanger | coolant_filter |
| SP14 | Check cooling water level | cooling_water_level |
| SP10 | Change secondary fuel filter | fuel_filter |
| R26058 | Gasket | gasket |
| R67989 | Gasket | gasket |
| SP11 | Check injectors | injector |
| SP12 | Check injectors, clean tips | injector |
| 19H1227 | Capscrew, 1/4" x 1/2" | other_service |
| 19H1782 | Capscrew, 3/4" x 2-1/4" | other_service |
| 19H2117 | Capscrew, 5/16" x 1-1/8" | other_service |
| 21H1318 | Screw, #12 x 1/2" | other_service |
| 63T34FH5301 | 63T34FH5301 | other_service |
| H79910 | Dowel Pin | other_service |
| OM175C2 | | other_service |
| R121690 | Flywheel Housing | other_service |
| R125027 | Housing | other_service |
| R31493 | Cover | other_service |
| R89195 | Plate | other_service |
| RG11569 | | other_service |
| T27860 | Washer | other_service |
| SP20 | eawater pump | pump |
| RE520036 | Seal | seal |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.
Common questions
What is the displacement of the John Deere 6081 Tier II?
The John Deere 6081 Tier II has a displacement of 8.1 liters with 6 cylinders.
Which generators use the John Deere 6081 Tier II engine?
The John Deere 6081 Tier II powers 1 generator set(s), including Northern Lights M175C2.
What oil filter does the John Deere 6081 Tier II use?
The John Deere 6081 Tier II uses oil filter part numbers John Deere RE519987, John Deere RE538245, John Deere 40124.
What fuel filter does the John Deere 6081 Tier II use?
The John Deere 6081 Tier II uses fuel filter part numbers John Deere RE522688, John Deere RE62420, John Deere R27091.
What air filter does the John Deere 6081 Tier II use?
The John Deere 6081 Tier II uses air filter part numbers John Deere AR79680, John Deere AH115833, John Deere SR80653.
How often should you change the oil in the John Deere 6081 Tier II?
The John Deere 6081 Tier II oil change interval is every 50 hours.
What is a common problem with the John Deere 6081 Tier II engine?
A commonly reported issue on generators using the John Deere 6081 Tier II is: Temperature is above 205°F (97°C). Fix: Shut off the engine immediately. Use the Trouble Shooting Guide on pages 22-24 to isolate the cause of the overheat. Allow the engine to cool and then remove the cap slowly, using protective clothing. Make repairs and restart after the temperature gauge registers below 180°F (83°C). Watch the temperature gauge regularly and turn off the unit if the temperature rises above 200°F (94°C). Repeat the troubleshooting process..