Service parts for the MDG250
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 | 220 kW |
| Standby kVA | 275 |
| Prime power | 200 kW |
| Emissions | 4 |
| Controller | Electronics 7310 MKII, Power Zone |
| Oil capacity | 32.5 L |
| Alternator | Marathon 363CSL1607 / 431CSL6202 / 431CSL6206 |
| Voltage options | 120/208 V, 277/480 V, 120/240 V |
| Phase | 1-phase, 3-phase |
| Rated current | 694 A |
| Power factor | 0.8 |
| Circuit breaker | 900 A |
| Battery group | 12 V |
| Battery cranking | 950 CCA |
| Battery voltage | 12 V |
| Battery quantity | 1 |
| Coolant capacity | 42.0 L |
| Max ambient | 42 °C |
| Dry weight | 4245 kg |
| Sound level | 75.0 dBA @ 7 m |
| Fuel tank | 1.0 L |
| Tank runtime | 33 hr |
Filters for the John Deere 6068HFG05 / 6068HFG06
6Engine-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 | P550779 | Lube Filter, Spin-On Full Flow | JOHN DEERE RE504836, JOHN DEERE RE50486, NAPA 7750S, SKYJACK 13502869 | KuduParts $19.00 |
| Oil filter | P551352 | Lube Filter, Spin-On Full Flow | JOHN DEERE DZ118286, JOHN DEERE PMLF3703, NAPA 401062, BALDWIN B40168 | buy |
| Fuel filter | P550090 | Fuel Filter, In-Line | JOHN DEERE AE20952, JOHN DEERE AT101565, ASV INCORPORATED 0201914, LOESING 025125 | FridayParts $45.66 |
| Fuel filter | P551130 | Fuel Filter, Box | JOHN DEERE AR50041, JOHN DEERE R16951, NAPA 3370, BALDWIN BF909 | KuduParts $37.00 |
| Fuel / water separator | P551424 | Fuel Filter, Water Separator Spin-On | JOHN DEERE RE503198, JOHN DEERE RE522868, NAPA 3532, NAPA 600094 | KuduParts $16.00 FridayParts $18.50 |
| Fuel / water separator | P551422 | Fuel Filter, Water Separator Cartridge | JOHN DEERE AT274723, JOHN DEERE RE22878, NAPA 3978, CLAAS 0011318200 | KuduParts $22.00 FridayParts $24.50 |
Maintenance & consumables
for the John Deere 6068HFG05 / 6068HFG06| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Replace when yellow center bar reaches red section on filter minder gauge (20 in. H2O) | — | |||
| Fuel filter | 0H48930267 | Amazon eBay NAPA $37.30 | |||
| Oil filter | Approved John Deere oil filter | — | 500 hr | ||
| Battery | Group 31, 12 VDC, 1,000 CCA, quantity 1 | — | |||
| Belt | Check automatic belt tensioner and belt wear; manual tensioner adjustable, automatic tensioner not adjustable | — | |||
| Coolant | 50% water / 50% antifreeze down to -12 °F (-24 °C); 40/60 to -34 °F (-36 °C) and below; maximum freeze protection 60% | 63.2 L | — | ||
| Oil | John Deere Plus-50 II, John Deere Plus-50; John Deere Torq-Gard Supreme, API CJ-4, API CI-4 PLUS, API CI-4, API CH-4, ACEA E9, ACEA E7, ACEA E6, ACEA E5, ACEA E4 | 32.5 L | — | 500 hr |
Compatible filters for the John Deere 6068HFG05 / 6068HFG06 — cross-referenced via Donaldson. Options to verify against your serial number, not confirmed for this exact unit.
Service intervals
22| Item | Action | Hours | Months | Notes |
|---|---|---|---|---|
| maintenance alarm reset | Other | 250 hr | Maintenance/service interval warning set at 250, 500 and 3,000 hours of engine running time | |
| Automatic belt tensioner and belt wear | Check | 500 hr | 12 mo | Recommended that the belt be removed and checked for wear at the 500 hour or 12 month service interval |
| Engine oil and oil filter | Change | 500 hr | 12 mo | First service — Change oil and filter between 100–500 hours during initial operation of new or rebuilt engine with Break-In Plus; if not using John Deere Plus 50 II, decrease interval to every 250 hours |
| coolant pump weep hole | Check | 500 hr | 12 mo | |
| cooling system | Check | 1500 hr | 12 mo | |
| fuel filter elements | Replace | 500 hr | 12 mo | |
| open crankcase vent (OCV) system | Check | 500 hr | 12 mo | |
| Cooling system | Test | 2000 hr | 24 mo | Pressure test cooling system |
| Engine speeds | Check | 2000 hr | 24 mo | |
| Crankshaft vibration damper | Check | 3000 hr | 36 mo | |
| DEF dosing unit filter | Change | 3000 hr | 36 mo | |
| Engine electrical ground connection | Check | 3000 hr | 36 mo | |
| Engine mounts | Check | 3000 hr | 36 mo | |
| Engine valve clearance | Adjust | 3000 hr | 36 mo | |
| Glow plugs | Test | 3000 hr | 36 mo | Test glow plugs for continuity |
| Cooling system | Change | 4500 hr | 60 mo | Flush and refill cooling system |
| Crankshaft vibration damper | Change | 4500 hr | 36 mo | |
| Thermostats | Test | 4500 hr | 60 mo | |
| Axles and jacks | Lubricate | 12 mo | Grease axles and jacks (annually) | |
| Wheel bearings | Inspect | 12 mo | Or every 12,000 miles (19,312 km); more frequent under dusty or damp conditions | |
| jacks | Lubricate | 12 mo | Jack maintenance procedures should be performed annually (side-wind and top-wind models) | |
| trailer wheel bearings | Lubricate | 12 mo | Minimum recommended lubrication every 12 months or 12,000 miles (19,312 km); more frequent in dusty or damp conditions |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Service specifications
40| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Other | Air filter restriction (replace point) | 20 | in. H2O | When yellow center bar reaches red section on filter minder gauge |
| Other | Air filter restriction indicator - replace air filter | 20 | in. H2O | yellow center bar reaches red section |
| Other | Altitude for full prime/standby power | 10,000 | ft (3,048 m) | 5% power loss per 1,000 ft above maximum altitude |
| Other | DEF urea concentration | 31.8-33.2 | % urea | |
| Other | DEF urea concentration | 31.8–33.2 | % urea | |
| Pressure | Air filter replacement threshold (filter minder) | 20 | in. H2O | yellow center bar reaches red section |
| Pressure | Engine oil pressure - normal operating | 35-80 | psi (241-552 kPa) | engine running |
| Pressure | Low oil pressure shutdown - verify pressure reached within five seconds of restart | 5 | psi (34.5 kPa) | within five seconds |
| Pressure | Maximum tire pressure | 125 | psi (862 kPa) | |
| Pressure | Minimum oil pressure at start | 5 | psi (34.5 kPa) | Within five seconds of start |
| Pressure | Oil pressure | 5 | psi (34.5 kPa) | within five seconds of restart |
| Pressure | Oil pressure gauge range | 0-100 | psi (0-689 kPa) | |
| Speed | Engine governed operating speed | 1800 | RPM | constant |
| Speed | Engine idle speed | 1,000 to 1,200 | rpm | idle |
| Speed | Engine idle speed | 1,000-1,200 | rpm | |
| Speed | Engine operating speed | 1,800 | rpm | |
| Speed | Operating speed (governed) | 1800 | rpm | |
| Speed | Output frequency | 60 | Hz | No load connected |
| Speed | Output frequency - normal operating | 60 | Hz | no loads connected |
| Temperature | Additional cold weather starting aids required below | -13 | °F (-25 °C) | |
| Temperature | Cold weather starting aids required below | 32 | °F (0 °C) | |
| Temperature | Coolant temperature gauge range | 150-250 | °F (66-121 °C) | |
| Temperature | Coolant temperature shutdown threshold | 210 | °F (99 °C) | |
| Temperature | DEF freezing point | 12 | °F (-11 °C) | |
| Temperature | Engine coolant temperature - normal operating | 180-200 | °F (82-93 °C) | average ambient air temperature of 70 °F (21 °C) |
| Temperature | Engine coolant temperature - stop engine | 210 | °F (99 °C) | or higher |
| Temperature | High coolant temperature - stop engine immediately | 210 | °F (99 °C) | or higher |
| Temperature | Maximum air temperature for full prime power | 42 | °C | standby power |
| Temperature | Maximum air temperature for full prime power (standby) | 49 | °C | MDG150/MDG175 standby; MDG250 prime |
| Temperature | Maximum allowable coolant temperature | 235 | °F (113 °C) | |
| Torque | Generator drive plate bolts | 40 | ft-lbs (54 Nm) | |
| Torque | Generator drive plate bolts | 44 | ft-lb (56.9 Nm) | |
| Torque | Wheel lug nuts - first pass | 20-25 | ft-lb (27-33 Nm) | First pass tightening |
| Torque | Wheel lug nuts - first pass | 20–25 | ft-lb (27–33 Nm) | |
| Torque | Wheel lug nuts - second pass | 50-60 | ft-lb (67-81 Nm) | Second pass tightening |
| Torque | Wheel lug nuts - second pass | 50–60 | ft-lb (67–81 Nm) | |
| Torque | Wheel lug nuts - third pass | 90-120 | ft-lb (122-162 Nm) | Third pass tightening |
| Torque | Wheel lug nuts - third pass | 90–120 | ft-lb (122–162 Nm) | |
| Voltage | Battery voltage - normal reading (12 volt systems) | 12-14 | V | engine running |
| Voltage | Fine voltage adjustment range | ±10 | % |
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 |
|---|---|---|---|---|---|
| Coolant | 50/50, 40/60, 40/60, 40/60 water/antifreeze mix | above -67°C | 63.2 L | Freezing point table: 50% water/50% antifreeze = -12 °F (-24 °C); 40%/60% = -34 °F (-36 °C); 40%/60% = -54 °F (-48 °C); 40%/60% (maximum freeze protection at 60%) = -90 °F (-67 °C). Do not use chromate base rust inhibitor with propylene glycol base antifreeze, boosters, or additives. | |
| Coolant | 50% water / 50% antifreeze (down to -12 °F / -24 °C); 40% water / 60% antifreeze (to -34 °F / -36 °C and -48 °F / -48 °C, -90 °F / -67 °C); maximum freeze protection 60% | above -24°C | 63.2 L | Coolant including engine 16.7 gal (63.2 L). Do not use chromate base rust inhibitor with propylene glycol base antifreeze, boosters, or additives. | |
| Def | Aqueous Urea Solution 32 (AUS 32) | ISO 22241-1 | -11°C to 30°C | 130.4 L | DEF freezes below 12 °F (-11 °C); quality degrades rapidly above 140 °F (60 °C). Ideal storage 23–86 °F (-5–30 °C). Urea concentration must remain between 31.8–33.2%. John Deere DEF recommended; API or AdBlue certified DEF acceptable. DEF Tank Volume 34.4 gal (130.4 L); usable 28 gal (106 L). |
| Def | Aqueous Urea Solution 32 (AUS 32); 31.8–33.2% urea | ISO 22241-1; API Diesel Exhaust Fluid Certification Program or AdBlue Diesel Exhaust Fluid Certification | -11°C to 30°C | 130.4 L | DEF tank total 34.4 gal (130.4 L), usable 28 gal (106 L). Unit does not ship from factory with DEF in tank. DEF freezes below 12 °F (-11 °C); degrades rapidly above 140 °F (60 °C); ideal storage 23–86 °F (-5–30 °C). John Deere DEF recommended. |
| Def | Aqueous Urea Solution 32 (AUS 32) - John Deere DEF recommended | ISO 22241-1 | -5°C to 30°C | 34.4 gal | DEF tank total 34.4 gal (130.4 L); usable 28 gal (106 L). Urea concentration must remain 31.8-33.2%. Degrades above 140 °F (60 °C); freezes below 12 °F (-11 °C). Ideal storage 23-86 °F (-5-30 °C). Use API or AdBlue certified DEF if John Deere DEF unavailable. |
| Engine oil | John Deere Plus-50 II or John Deere Plus-50 (extended 500 hr interval); John Deere Torq-Gard Supreme, API CJ-4, API CI-4 PLUS, API CI-4, API CH-4, ACEA E9, ACEA E7, ACEA E6, ACEA E5, ACEA E4 | 32.5 L | Oil capacity including filter 8.6 gal (32.5 L); 500 hour extended oil and filter change interval only with John Deere Plus-50 II/Plus-50 oil and approved John Deere oil filter. Factory filled with break-in oil. | ||
| Engine oil | John Deere Plus-50 II, John Deere Plus-50, John Deere Torq-Gard Supreme | API CJ-4, API CI-4 PLUS, API CI-4, API CH-4, ACEA E9, ACEA E7, ACEA E6, ACEA E5, ACEA E4 | 8.6 gal | Oil including filter = 8.6 gal (32.5 L). 500 hour extended oil/filter change interval only with John Deere Plus-50 II or Plus-50 oil and an approved John Deere oil filter. Use high quality detergent oil with viscosity appropriate for ambient temperature. | |
| Engine oil | John Deere Plus-50, John Deere Plus-50 II, John Deere Torq-Gard Supreme, API CJ-4, API CI-4 PLUS, API CI-4, API CH-4, ACEA E9, ACEA E7, ACEA E6, ACEA E5, ACEA E4 | 32.5 L | Oil (including filter) capacity 8.6 gal (32.5 L). 500 hour extended drain interval only with extended drain oil pan, diesel sulfur content less than 2000 mg/kg, John Deere Plus-50 II or Plus-50 oil and approved John Deere oil filter. Factory filled with break-in oil. | ||
| Fuel | Ultra Low Sulfur Diesel | 358.0 gal | Standard fuel tank total 358 gal (1,355 L); usable 343 gal (1,297 L). Optional fuel tank total 529 gal (2,002 L); usable 513 gal (1,914 L). | ||
| Grease | High quality grease made specifically for lubrication of wheel bearings; automotive grease for jack internal gearing | Lubricate wheel bearings every 12 months or 12,000 miles (19,312 km); jack maintenance annually |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Procedures
12Changing DVR2400 Voltage Regulator Settings adjustment
⚠ Modifications of parameter values are immediately effective.
- Repeatedly press SELECT button until the desired parameter displays.
- Press ENTER; EDIT mode activates and current value displays.
- Press UP and DOWN buttons to modify the value.
- Press ENTER to save; value flashes three times to confirm.
Fine Voltage Adjustment adjustment
- With the unit running, press the Voltage Adjust button.
- Press ENTER. The voltages displayed will flash.
- Use UP and DOWN arrows to adjust the voltage.
- Press ENTER to confirm; the voltages stop flashing.
Checking Generator Drive Plate Torque maintenance
Tools: Torque wrench
- Disconnect battery.
- Remove generator fan guard.
- Tighten each of the drive plate bolts to 44 ft-lb (56.9 Nm).
- Install generator fan guard.
- Connect battery.
Cleaning DEF Tank maintenance
Tools: Suitable container, Distilled water
- Drain DEF tank into a suitable container.
- Flush DEF tank with distilled water.
- Fill with new or good DEF.
DEF Tank Cleaning maintenance
- Drain DEF tank into a suitable container.
- Flush DEF tank with distilled water, and fill with new or good DEF.
Jack Maintenance maintenance
⚠ Perform annually.
Tools: Grease gun, Needle-nose applicator
- Side-wind: apply automotive grease to internal gearing via jack cover, needle-nose applicator, or grease gun; rotate handle to distribute.
- Side-wind: apply lightweight oil to handle at both sides of the tube.
- Side-wind: lubricate caster wheel axle bolt and nut if equipped.
- Top-wind: apply lightweight oil to the screw stem.
Jack Maintenance (Side-Wind Models) maintenance
Tools: Grease gun, Needle nose applicator
- Apply a small amount of automotive grease to the internal gearing.
- Rotate the jack handle to distribute the grease evenly.
- Apply lightweight oil to the handle unit at both sides of the tube.
- If equipped, lubricate the caster wheel axle bolt and nut assembly with the same lightweight oil.
Refilling DEF Tank maintenance
⚠ Risk of poisoning. Do not ingest diesel exhaust fluid.
⚠ Immediately clean any surfaces with water that come in contact with diesel exhaust fluid.
⚠ If DEF is filled into engine fuel tank, do not operate engine until system is purged.
Tools: Lint free cloth, Polyethylene, polypropylene, or stainless steel containers
- Verify DEF tank cap area is free of debris before removing cap.
- Wipe clean with a lint free cloth.
- Seal DEF containers between use to prevent contamination and evaporation.
- Avoid splashing DEF and contact with skin, eyes, or mouth.
- Check DEF level daily and refill tank as needed; fill port has blue cap with DEF symbol.
Resetting Maintenance Alarms maintenance
- With unit shut down, move control power switch to CONTROL ON (I).
- Press ▲, ►, ▼, or ◄ to enter the maintenance screens.
- Press and O simultaneously to display the Configuration menu.
- Press to move the cursor down to the maintenance group.
- Press ► to access sections; press to highlight the maintenance section.
- Press ► to access parameters and highlight the maintenance alarm to reset.
- Press to select editable parameters; press to highlight RESET.
- Press to reset the selected maintenance alarm.
- Repeat steps 6–8 for additional alarms.
- Press and hold for five seconds to save changes; press and hold O for five seconds to discard.
Resetting the Maintenance Alarms maintenance
- With unit shut down, move control power switch to CONTROL ON (I).
- Press a navigation button to enter the maintenance screens.
- Press enter and O simultaneously to display the Configuration menu.
- Move cursor down to the maintenance group.
- Press right arrow to access sections; highlight the maintenance section.
- Press right arrow to access parameters; highlight the alarm to reset.
- Press enter to select editable parameters; highlight RESET and press enter.
- Press and hold enter for five seconds to save changes.
Testing DEF maintenance
⚠ Do not create DEF by mixing agricultural grade urea with water.
Tools: JDG11594 Digital DEF Refractometer, JDG11684 DEF Refractometer
- Draw a DEF sample into a clear container; DEF must be crystal clear.
- If cloudy or tinted, drain tank, flush with distilled water, and fill with new DEF.
- If visual and smell tests pass, check concentration with a handheld refractometer.
- If concentration is not within specification, drain, flush with distilled water, and refill.
Trailer Wheel Bearings maintenance
⚠ More frequent lubrication may be required under extremely dusty or damp conditions.
Tools: Standard grease gun, Clean cloth, High quality wheel bearing grease
- Remove the small rubber plug on the grease cap.
- Attach a standard grease gun fitting to the grease fitting.
- Pump grease into the fitting until new grease is visible around the nozzle.
- Wipe excess grease from the hub with a clean cloth and replace the rubber plug.
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 |
|---|---|---|---|---|
| 3 | Cam lock panel / terminal lugs | L1 Black, L2 Red, L3 Blue, N White, G Green | NEUTRAL (L0) BONDED TO FRAME from factory; bonding plate must be removed when used as standby power source | |
| 120/208 | 3 | 120/208V 3-phase (Low Wye) | L1, L2, L3, N | L1-L2 = 208V, L2-L3 = 208V, L3-L1 = 208V; L1-N = 120V, L2-N = 120V, L3-N = 120V |
| 120/208V | 3 | Low wye (120/208V 3-phase) | T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12 | L1-L2 = 208V; L1-N = 120V; L2-L3 = 208V; L2-N = 120V; L3-L1 = 208V; L3-N = 120V |
| 120/208V | 3 | Low wye / Zig zag | T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, N | L1-L2 = 208V, L2-L3 = 208V, L3-L1 = 208V; L1-N = 120V, L2-N = 120V, L3-N = 120V. |
| 120/240 | 1 | 120/240V 1-phase (Zig Zag) | L1, L3, N | L1-L3 = 240V; L1-N = 120V; L2-N = -------; L3-N = 120V |
| 120/240 | 3 | 120/240V 3-phase (optional 4th position on voltage selector switch) | L1, L2, L3, N | L1-L2 = 240V, L2-L3 = 240V, L3-L1 = 240V; L1-N = 120V, L2-N = 208V, L3-N = 120V |
| 120/240V | 1 | Single phase | T1, T2, T4, T5, T6, T8, T10, T11, T12, N | L1-L2 = 240V; L1-N = 120V. |
| 120/240V | 1 | Zig zag (120/240V 1-phase) | T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12 | L1-L3 = 240V; L1-N = 120V; L2-N = -------; L3-N = 120V |
| 120/240V | 3 | Delta (120/240V 3-phase, 4-position switch only) | T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12 | L1-L2 = 240V; L1-N = 120V; L2-L3 = 240V; L2-N = 208V; L3-L1 = 240V; L3-N = 120V |
| 120/240V | 3 | Delta (4-position switch) | T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, N | L1-L2 = 240V, L1-N = 120V; L2-L3 = 240V, L2-N = 208V; L3-L1 = 240V, L3-N = 120V. |
| 208 | 3 | Voltage selector switch position label | Neutral (L0) bonded to frame when shipped from factory; bonding plate must be removed when used as standby power source | |
| 277/480 | 3 | 277/480V 3-phase (Hi Wye) | L1, L2, L3, N | L1-L2 = 480V, L2-L3 = 480V, L3-L1 = 480V; L1-N = 277V, L2-N = 277V, L3-N = 277V |
| 277/480V | 3 | Hi wye (277/480V 3-phase) | T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12 | L1-L2 = 480V; L1-N = 277V; L2-L3 = 480V; L2-N = 277V; L3-L1 = 480V; L3-N = 277V |
| 277/480V | 3 | Hi wye / Delta (4-position) | T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, N | L1-L2 = 480V, L2-L3 = 480V, L3-L1 = 480V; L1-N = 277V, L2-N = 277V, L3-N = 277V. Neutral bonded to frame. |
| 480 | 3 | Voltage selector switch position label | Terminal lead colors: L1 Black, L2 Red, L3 Blue, N (Neutral) White, G (Ground) Green |
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 size generator is the Generac MDG250?
The Generac MDG250 is rated 220 kW standby (275.0 kVA).
What engine does the Generac MDG250 use?
The Generac MDG250 is powered by the John Deere 6068HFG05 / 6068HFG06 engine.
What fuel does the Generac MDG250 use?
The Generac MDG250 runs on Diesel.
How much oil does the Generac MDG250 take?
The John Deere 6068HFG05 / 6068HFG06 engine in the Generac MDG250 has an oil capacity of 32.5 liters.
What is the cooling system capacity of the Generac MDG250?
The Generac MDG250 cooling system holds 42 liters (11.1 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.
What is the continuous rating of the Generac MDG250?
The Generac MDG250 is rated 200 kW prime (250 kVA), against 220 kW standby.
How loud is the Generac MDG250?
The Generac MDG250 is rated at 75.0 dBA at 7 m, per the manufacturer specification sheet.
What is the dry weight of the Generac MDG250?
The Generac MDG250 has a dry weight of 4245 kg (9358 lb).
What size fuel tank does the Generac MDG250 have?
The Generac MDG250 has a 1 liter (0 US gallon) fuel tank, giving about 33 hours of runtime.
What voltage does the Generac MDG250 produce?
The Generac MDG250 is offered in 120/208 V, 277/480 V, 120/240 V, 1-phase, 3-phase-phase.
How many cold cranking amps does the Generac MDG250 require?
The Generac MDG250 uses 1 battery, 12 V each, 950 CCA, group 12 V, per the manufacturer specification sheet.
What alternator comes on the Generac MDG250?
The Generac MDG250 uses a Marathon 363CSL1607 / 431CSL6202 / 431CSL6206 alternator.
What oil filter fits the Generac MDG250?
The Generac MDG250 uses oil filter part numbers JOHN DEERE RE519987, JOHN DEERE RE555072.
What fuel filter fits the Generac MDG250?
The Generac MDG250 uses fuel filter part number 0H48930267.
Which air filter part number does the Generac MDG250 take?
The Generac MDG250 uses air filter part numbers JOHN DEERE AR79680, JOHN DEERE 4S00686R.
Troubleshooting
6Fault codes
| Code | Meaning |
|---|---|
| FXXX | Indicates a fault state. The DVR stops providing excitation. |
Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| Low Load indicator LED is illuminated. | Resolve by increasing electrical load. If unable to operate genset at more than 30% load, use a smaller generator. | |
| Lug Door Open indicator LED is illuminated. | Resolve by closing lug-box door. If condition remains unresolved, inspect lug-box door safety switch for proper operation. | |
| Emergency Stop indicator LED is illuminated. | Resolve by deactivating (pulling out) Emergency Stop switch. | |
| Shutdown indicator LED is illuminated. | Resolve by resolving shutdown condition. | |
| AXXX indicates an alarm state. The DVR continues to provide excitation, if excitation is enabled. | [blank] Indicates normal operation in SLEEP mode. STBY Indicates normal operation in stand-by mode, waiting for the STRT state. STRT Indicates DVR is in a soft start state. RUN.V Indicates normal operation, with excitation in AVR mode. RUN.I Indicates normal operation, with excitation in FCR mode. RUN.P Indicates normal operation, with excitation in VAR or PF mode. FLSH Indicates DVR is in field flashing mode. IDLE Indicates normal operation in idle state, waiting for the speed to take off. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Repair guides
24- AUTO (Remote) Starting the Unit
- Automatic Parallel
- Automatic Parallel Operation
- Changing DVR2400 Voltage Regulator Settings
- Cleaning DEF Tank
- Disabling Automatic (AUTO) Exhaust After-Treatment Cleaning
- Enable Exhaust After-Treatment Cleaning
- Enabling Exhaust After-Treatment Cleaning
- Force a Manual Exhaust After-Treatment Cleaning
- Forcing a Manual Exhaust After-Treatment Cleaning
- Jack Maintenance (Side-Wind Models)
- Manual Parallel
- Manual Parallel Operation
- Manually Starting the Unit
- Refilling DEF Tank
- Resetting Maintenance Alarms
- Resetting the Maintenance Alarms
- Shutting Down the Unit
- Shutting Down the Units in MANUAL Mode
- Testing DEF
Step-by-step procedures compiled from the Generac service manual for this model.
Parts
19| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 011064 | Cold Weather Operation | Cold weather operation | Amazon eBay | |
| 011068 | Status: Generator at Rest, Stop Mode, 22:31 | Service part / kit | Amazon eBay | |
| 011136 | DANGER Electrocution. Do not disable or modify the connection box door safety switch. | Service part / kit | Amazon eBay | |
| 10000017419 | Assembly, front panel | 1 | Service part / kit | Amazon eBay |
| 10000017428 | Assembly, rear door | 1 | Service part / kit | Amazon eBay |
| 10000017429 | Assembly, control door - top | 1 | Service part / kit | Amazon eBay |
| 10000017439 | Assembly, rear door - left | 1 | Service part / kit | Amazon eBay |
| 10000017449 | Assembly, front panel - left | 1 | Service part / kit | Amazon eBay |
| 10000017453 | Assembly, fuel panel | 1 | Service part / kit | Amazon eBay |
| 10000017461 | Assembly, front panel - right | 1 | Service part / kit | Amazon eBay |
| 10000017467 | Assembly, control door - bottom | 1 | Service part / kit | Amazon eBay |
| 10000017475 | Assembly, front door - right | 1 | Service part / kit | Amazon eBay |
| 10000017490 | Assembly, front door - left | 1 | Service part / kit | Amazon eBay |
| 10000017492 | Assembly, front access panel | 1 | Service part / kit | Amazon eBay |
| 10000017497 | Assembly, control panel door | 1 | Service part / kit | Amazon eBay |
| 10000017520 | Assembly, receptacle / e-stop panel | 1 | Service part / kit | Amazon eBay |
| 53691B | Panel, roof - fwd | 1 | Service part / kit | Amazon eBay |
| 54919W | Panel, top cover - front | 1 | Service part / kit | Amazon eBay |
| 54920W | Panel, top plate - back | 1 | 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% | 12.7 | 3.4 |
| Prime | 50% | 19.8 | 5.25 |
| Prime | 75% | 26.8 | 7.1 |
| Prime | 100% | 33.3 | 8.7 |
| Standby | 110% | 57.5 | 15.2 |
Available documents
Spec sheet — mdg250 diesel-generator spec-sheet english (Generac)Owner's manual — A0000393893 (Generac)Owner's manual — Generac Towable MDG150-175-250DF4 Operators Manual (Generac)Owner's manual — mdg150-mdg175-mdg250 owners-manual (Generac)Parts manual — 10000014970 (Generac)
This page was generated from the 5 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.