The John Deere 6068TF250 is a 6.8 L 6-cylinder turbocharged engine rated at 2200 rpm, producing up to 106 kW. It powers generator sets from John Deere and MQ Power, including the DCA-125SSJU and DCA-125SSJU2.
Also known as: John Deere Power Systems 6068TF250
Part of the John Deere 6068 engine family — 56 variants share parts & fitment.
| Displacement | 6.8 L |
|---|---|
| Cylinders | 6 |
| Aspiration | Turbocharged |
| Rated speed | 2200 rpm |
| Gross power | 106 kW |
Shared across brands: John Deere, MQ Power
| Symptom | Cause | Remedy |
|---|---|---|
| Engine hard to start or will not start. | Dirty or faulty injection nozzles; Crankcase oil too heavy; Improper type of fuel; Water, dirt or air in fuel system; Clogged fuel filter; Engine overloaded; Intake air restriction; Clogged fuel filter | Consult authorized diesel repair station; Use cold weather starting aids; Verify correct starting procedure; Use oil of proper viscosity; Drain, flush, fill, and bleed system; Replace filter element; Reduce load; Service air cleaner; Replace filter elements; Use proper fuel |
| Engine overloaded. | Reduce load | |
| Intake air restriction. | Service air cleaner | |
| Clogged fuel filter. | Replace filter elements; Drain, flush, fill, and bleed system; Replace fuel filter element | |
| Improper type of fuel. | Use proper type of fuel for operating conditions; Use proper fuel | |
| Overheated engine. | See “Engine Overheats” | |
| Low coolant temperature. | Remove and check thermostat; Warm up engine to normal operating temperature | |
| Engine knocks. | See “Engine Overheats” | |
| Defective thermostat. | Remove and check thermostat; Check water temperature with thermometer and replace, if necessary | |
| Engine runs irregularly or stalls frequently. | Dirty or faulty injection nozzles | See your authorized servicing dealer or engine distributor |
| Defective temperature gauge or sender. | Check gauge, sender and connections | |
| Engine emits white smoke. | Engine out of time | See your authorized servicing dealer or engine distributor |
| Engine out of time. | See your authorized servicing dealer or engine distributor | |
| Engine emits black or gray exhaust smoke. | Turbocharger not functioning | See your authorized servicing dealer or engine distributor |
| Low coolant level. | Fill radiator to proper level, check radiator and hoses for loose connections or leaks; Check thermostat | |
| Faulty radiator cap. | Have service company check | |
| Stretched poly-vee belt or defective belt tension. | Check automatic belt tensioners and check belts for stretching. Replace as required | |
| Low engine oil level. | Check oil level. Add as required | |
| Cooling system needs flushing. | Flush cooling system | |
| Engine overheats. | Incorrect grade of fuel | Use correct grade of fuel |
| Clogged or dirty air cleaner. | Service air cleaner | |
| Improper valve clearance. | See your authorized servicing dealer or engine distributor | |
| Injection nozzles dirty. | See your authorized servicing dealer or engine distributor | |
| Defective turbocharger. | See your authorized servicing dealer or engine distributor | |
| High fuel consumption. | Low engine temperature | Check thermostat; Check water temperature with thermometer and replace, if necessary |
| Engine shuts down after approx. 15 seconds. | Poor connection on oil or coolant temperature switches | Check connections; Check controller DIP switches |
| Alternator doe not excite. | Blown Fuse. Insufficient Voltage. No residual Voltage. | Replace Fuse. Increase speed by 15%. For an instant apply on the + and – terminals of the electronic regulator a 12 V battery voltage with a 30 ? resistor in series respecting the polarities. |
| After being excited, alternator does not excite. | Connections are interrupted. Low voltage at no load. Voltage potentiometer out of setting. Intervention of protection. Winding Failure. | Check connection cables per drawings. Reset Voltage. Check RPM. Check Windings. |
| High voltage at no load. | Voltage potentiometer out of setting. Failed regulator. | Reset Voltage. Substitute regulator. |
| Lower than rated voltage at load. | Voltage potentiometer out of setting. Intervention by protection. Failed regulator. | Reset voltage potentiometer. Current too high, power factor lower than 0.8, speed lower than 4% of rated speed. Substitute regulator. |
| Higher than rated voltage. | Voltage potentiometer out of setting. Failed regulator. | Reset Voltage. Substitute regulator. |
| Unstable voltage. | Speed variation in engine. Regulator out of setting. | Check engine rotation. Regulate the stability of regulator by acting on “STABILITY” potentiometer. |
| Incorrect starting procedure. | Verify correct starting procedure. | |
| No fuel. | Check fuel in tank and manual shut-off valve. | |
| Exhaust restricted. | Check and correct exhaust restriction. | |
| Fuel filter plugged or full of water. | Replace fuel filter or drain water from filter. | |
| Injection pump not getting air or fuel. | Check fuel flow at supply pump or bleed fuel system. | |
| Engine cranks but will not start. | Fau |
Fault codes and symptom→remedy steps extracted from this engine’s service/owner documentation; verify against the official manual before servicing.
Compiled from service & troubleshooting documentation across every generator set that uses the John Deere 6068TF250.
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Fuel filter | — | 500 hr | find | ||
| Oil filter | DZ118286 | 500 hr | PartsGeek | ||
| Belt | — | 250 hr | find | ||
| Coolant filter | — | find | |||
| Oil | — | 500 hr |
Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.
| Part # | Description | Category |
|---|---|---|
| G030077 | Air Cleaner Element (Engine) Primary | air_filter |
| G030078 | Air Cleaner Element (Engine) Secondary | air_filter |
| GM90735 | Air Cleaner | air_filter |
| GM91358 | Element, Air Cleaner | air_filter |
| GM92823 | Element, Air Cleaner Safety | air_filter |
| MQ-125-AIR-FILTER | Air Filter | air_filter |
| DZ114956 | ALTERNATOR | alternator |
| DZ117503 | ALTERNATOR (24V, 140A) (3127) | alternator |
| DZ123153 | ALTERNATOR | alternator |
| RE505895 | ALTERNATOR (12V, 75A) | alternator |
| RE506196 | ALTERNATOR (12 V, 55 AMP) | alternator |
| RE533516 | ALTERNATOR | alternator |
| RE533653 | ALTERNATOR | alternator |
| RE533654 | ALTERNATOR (12V, 120A) | alternator |
| RE537146 | ALTERNATOR (28V, 50A) (3142) | alternator |
| RE537508 | ALTERNATOR | alternator |
| RE550906 | ALTERNATOR | alternator |
| RE555751 | ALTERNATOR | alternator |
| RE558675 | ALTERNATOR | alternator |
| RE558676 | ALTERNATOR | alternator |
| RE558678 | ALTERNATOR | alternator |
| RM100224 | ALTERNATOR (REMAN FOR RE505895) (12V, 75A) (3135) | alternator |
| SE501341 | (REMAN FOR AT161324, DZ114957) (3142) | alternator |
| 8972824026 | Battery Acid charge Pb-Ca maintenance free, 24V - 1100 CCA | battery |
| MQ-125-BATTERY | Battery | battery |
| DZ114929 | FAN BELT (LGTH = 1655 mm) | belt |
| DZ115455 | FAN BELT (LGTH = 1550 mm) | belt |
| DZ115812 | FAN BELT (LGTH = 1680 mm) | belt |
| DZ117267 | FAN BELT (LGTH = 1690 mm) | belt |
| DZ117268 | FAN BELT (LGTH = 1530 mm) | belt |
| DZ118556 | FAN BELT | belt |
| DZ118557 | FAN BELT | belt |
| DZ118558 | FAN BELT | belt |
| DZ118559 | FAN BELT | belt |
| DZ118560 | FAN BELT (LGTH = 1720 mm) | belt |
| DZ118561 | FAN BELT (LGTH = 1750 mm) | belt |
| DZ118764 | FAN BELT (LGTH = 1525 mm) | belt |
| DZ118781 | FAN BELT (LGTH = 1700 mm) | belt |
| DZ118786 | (LGTH=1715 mm) (24GL) | belt |
| DZ118815 | FAN BELT (LGTH = 1725 mm) | belt |
| DZ119018 | FAN BELT | belt |
| DZ119059 | FAN BELT | belt |
| DZ119060 | FAN BELT (LGTH = 1555 mm) | belt |
| DZ119061 | FAN BELT (LGTH = 1540 mm) | belt |
| DZ119062 | FAN BELT | belt |
| DZ119063 | FAN BELT | belt |
| DZ119416 | FAN BELT | belt |
| DZ119477 | FAN BELT (LGTH = 1565 mm) | belt |
| DZ119478 | FAN BELT (LGTH = 1570 mm) | belt |
| DZ119515 | FAN BELT | belt |
| DZ119516 | FAN BELT | belt |
| DZ119520 | FAN BELT | belt |
| DZ119521 | FAN BELT | belt |
| DZ119522 | FAN BELT | belt |
| DZ119530 | FAN BELT (LGTH = 1675 mm) | belt |
| DZ119531 | FAN BELT | belt |
| DZ119533 | FAN BELT | belt |
| DZ119715 | FAN BELT | belt |
| DZ121128 | FAN BELT (LGTH = 1725 mm) | belt |
| DZ121129 | FAN BELT | belt |
| DZ121133 | FAN BELT | belt |
| MQ-125-BELT | V-Belt | belt |
| R134625 | FAN BELT (LGTH = 1645 mm) | belt |
| R500277 | FAN BELT | belt |
| T282795 | FAN BELT | belt |
| T428692 | FAN BELT (LGTH = 1665 mm) | belt |
| T428724 | FAN BELT (LGTH = 1575 mm) | belt |
| T428725 | FAN BELT | belt |
| T428818 | FAN BELT | belt |
| T428820 | FAN BELT (LGTH = 1580 mm) | belt |
| T428822 | FAN BELT | belt |
| T428823 | FAN BELT | belt |
| T428825 | FAN BELT | belt |
| T428863 | FAN BELT | belt |
| VP64S17 | Pump Belt | belt |
| 362140-S | Main controller circuit board | controller_board |
| MOOOOO-20001Q | Auto START/STOP Engine Controller (ECU) | ecm |
| RE520385 | Short Block Assembly (L-M-NL1066T, M99C2) | engine |
| 011134 | Engine exhaust | engine_exhaust |
| 5990101 | Power switching device (contactor) | exerciser_switch |
| MQ-125-FUEL-FILTER | Fuel Filter | filter |
| MQ-125-OIL-FILTER | Oil Filter | filter |
| G122208 | Clarke Eng Fluid - 5 gal | fluid |
| G122209 | Clarke Eng Fluid -1 gal | fluid |
| MQ-125-COOLANT | Coolant | fluid |
| MQ-125-OIL | Engine Oil | fluid |
| CO2775 | Element, Fuel Water Separator | fuel_filter |
| CO2776 | Element, Fuel Filter Primary | fuel_filter |
| DZ100304 | Diesel Exhaust Fluid Inline Filter | fuel_filter |
| DZ112918 | SECONDARY FUEL FILTER | fuel_filter |
| DZ115392 | Secondary Fuel Filter | fuel_filter |
| DZ128543 | FUEL FILTER (35HS) (35HT) (35HU) (35HV) | fuel_filter |
| RE509031 | ENGINE SECONDARY FUEL FILTER | fuel_filter |
| RE509208 | PRIMARY FUEL FILTER | fuel_filter |
| RE520906 | PRIMARY FUEL FILTER | fuel_filter |
| RE541578 | CRANKSHAFT PULLEY AND DAMPER; OD = 190 mm (1343) | fuel_filter |
| RE60021 | FINAL FUEL FILTER | fuel_filter |
| RE62419 | FUEL FILTER | fuel_filter |
| 011135 | Generator box | generator_box |
| 10000037182 | Clamp, hose - spring type CTB-27ST | hose |
| 50332 | Hose, fuel .750 ID 35 PSI SAE 30R7 | hose |
| 60316 | Clamp, hose - SAE 032 (1.56-2.50) | hose |
| GM91647 | Hose, Hump | hose |
| C04521 | Element, Oil Filter | oil_filter |
| DZ118286 | OIL FILTER | oil_filter |
| RE504836 | OIL FILTER | oil_filter |
| RE539279 | ENGINE OIL FILTER | oil_filter |
| 003574 | Quick Disconnect Fittings for the Lights | other_service |
| 006429 | Owner’s Manual for Mobile Generator | other_service |
| 2x594 | Ampere rating | other_service |
| 46606373 | other_service | |
| 51551 | Decal set, safety | other_service |
| 51552 | Decal, high temp | other_service |
| 54005 | CAP, DEF FILL | other_service |
| 55104 | CAP, FUEL FILL 3.50 - GREEN | other_service |
| 9753300442 | Oil sample kit | other_service |
| DCA-125USJ | Battery Connections | other_service |
| DCA-150USJ | Battery Connections | other_service |
| DZ105100 | CRANKCASE VENT FILTER | other_service |
| DZ105796 | OCV FILTER | other_service |
| DZ110282 | SHORT BLOCK ASSEMBLY | other_service |
| DZ110562 | Crankcase Vent System (USE WITH DZ113378 974G) | other_service |
| DZ111004 | DEF TANK HEADER FILTER (25 Micron) | other_service |
| DZ111166 | (3402) (3404) (3408) (3409) (974G) | other_service |
| DZ114640 | DIESEL EXHAUST FLUID (DEF) DOSING UNIT FILTER | other_service |
| DZ114695 | DEF TANK INLET SCREEN | other_service |
| DZ119883 | TORSIONAL DAMPER | other_service |
| G122191 | 250 hour Maintenance Kit (without fluids) | other_service |
| G122196 | 250 hour Maintenance Kit (& engine fluids) | other_service |
| G122201 | 500 hour Maintenance Kit (without fluids) | other_service |
| G122206 | 500 hour Maintenance Kit (& Engine fluids) | other_service |
| GM75552 | Block Heater Kit | other_service |
| GM75553 | Block Heater Kit | other_service |
| M2870400404 | Parts List No. | other_service |
| M2870400404C | other_service | |
| M3870400104 | other_service | |
| R113480 | FAN PULLEY | other_service |
| R128658 | FAN PULLEY | other_service |
| R128659 | FAN PULLEY | other_service |
| R128660 | FAN PULLEY | other_service |
| R128662 | FAN PULLEY (OD = 203 mm) | other_service |
| R133295 | CRANKSHAFT PULLEY (OD = 169 mm) | other_service |
| R133296 | CRANKSHAFT PULLEY & DAMPER (OD = 193 mm) | other_service |
| R522890 | FAN PULLEY | other_service |
| R545125 | CRANKSHAFT PULLEY (OD = 188 mm) | other_service |
| RE500013 | CRANKSHAFT PULLEY & DAMPER | other_service |
| RE505881 | (2’) | other_service |
| RE505940 | (2’) | other_service |
| RE505941 | (OD = 188 mm) | other_service |
| RE571655 | Short Block Assembly | other_service |
| RE57604 | TORSIONAL DAMPER | other_service |
| RE59355 | CRANKSHAFT PULLEY & DAMPER | other_service |
| SE501094 | CONNECTING ROD (REMAN FOR RE500608) (4838) | other_service |
| SE501581 | CYLINDER HEAD (REMAN FOR RE57489) (5107) | other_service |
| RE505939 | (1321) | pulley |
| RE508578 | CRANKSHAFT PULLEY | pulley |
| RE528428 | CRANKSHAFT PULLEY & DAMPER (OD = 264 mm) (1340) | pulley |
| SE501236 | FUEL INJECTION PUMP (REMAN FOR RE518088) (16L8, 16L9) | pump |
| SE501609 | (REMAN FOR RE546906) (4433) (4434) (4446) (4447) | pump |
| SE501814 | OIL PUMP (REMAN FOR DZ100057) (5001) | pump |
| MQ-125-SPARK-PLUG | Spark Plug | spark_plug |
| 2.03 | Starter motor rated | starter |
| 2.76 | Starter motor rated | starter |
| DZ110068 | Starter Motor (12V) | starter |
| DZ110083 | STARTER | starter |
| DZ129200 | STARTER | starter |
| RE501150 | STARTER | starter |
| RE501166 | STARTER | starter |
| RE523501 | STARTER (3073) | starter |
| RE523502 | STARTER | starter |
| RE540301 | STARTER (12V, 2.5KW) (3005) | starter |
| RE540302 | STARTER | starter |
| RE546868 | STARTER | starter |
| RE549229 | STARTER | starter |
| RE549230 | STARTER | starter |
| RE551637 | STARTER (12 V) | starter |
| RE551644 | STARTER | starter |
| RE552251 | STARTER | starter |
| RE564633 | STARTER | starter |
| RE64474 | STARTER | starter |
| RE65175 | STARTER | starter |
| RE65189 | STARTER | starter |
| RE70474 | STARTER (12V, 4.8KW) | starter |
| RE70957 | STARTER | starter |
| RE70960 | STARTER | starter |
| RE70961 | STARTER | starter |
| SE501401 | STARTER (REMAN FOR RE540301) (12V, 2.5KW) (3005) | starter |
| SE502632 | STARTER | starter |
| SE502333 | TURBOCHARGER (REMAN FOR RE509435) (65EC) | turbocharger |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.
Parts listed by aftermarket suppliers as fitting this engine — leads compiled from supplier catalogs; verify the exact part for your serial number.
Cross-referenced via Donaldson + OEM/engine-maker interchange — options to verify against your serial number, not confirmed for every exact variant.
Other equipment known to use this engine, via filter-application cross-reference — useful for sourcing parts even when your exact machine isn't listed elsewhere on this page.
The John Deere 6068TF250 has a displacement of 6.8 liters with 6 cylinders.
The John Deere 6068TF250 powers 3 generator set(s), including John Deere 6068TF250, MQ Power DCA-125SSJU, MQ Power DCA-125SSJU2.
The John Deere 6068TF250 uses oil filter part numbers John Deere DZ118286, Donaldson P551352, Wix 57243.
The John Deere 6068TF250 oil change interval is every 500 hours.
A commonly reported issue on generators using the John Deere 6068TF250 is: Unstable voltage.. Cause: Speed variation in engine. Regulator out of setting.. Fix: Check engine rotation. Regulate the stability of regulator by acting on “STABILITY” potentiometer..