Service parts for the MMG35DF4
Grouped by system, with how many of each the parts manual calls for.
Air intake
1 requiredFuel system
1 requiredOil system
1 requiredBelts
1 requiredCooling system
1 requiredElectrical
1 requiredIgnition
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 | 31 kW |
| Standby kVA | 39 |
| Prime power | 29 kW |
| Emissions | EPA Tier F4 |
| Controller | Power Zone |
| Oil capacity | 10.4 L |
| Alternator | Marathon 284CSL1542 |
| Voltage options | 120 V, 139 V, 208 V, 220 V, 240 V, 277 V, 440 V, 480 V |
| Phase | 1 or 3 |
| Power factor | 1 (1Ø), 0.8 (3Ø) |
| Circuit breaker | 125 A |
| Battery group | 24 |
| Battery cranking | 720 CCA |
| Battery voltage | 12V V |
| Battery quantity | 1 |
| Coolant capacity | 17 L |
| Dry weight | 1418 kg |
| Wet weight | 1751 kg |
| Sound level | 68.0 dBA @ 7.0 m |
| Fuel tank | 379.0 L |
| Tank runtime | 31 hr |
Engine
| Oil capacity | 10.4 L |
|---|---|
| Coolant capacity | 17.0 L |
| Displacement | 2.9 L |
| Aspiration | Turbocharged & Aftercooled |
| Rated speed | 1800 rpm |
Filters & service parts
model family| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | 010419 | 250 hr | Amazon eBay KuduParts $147.99 | ||
| Fuel filter | 010418 | 250 hr | Amazon eBay $22.46 | ||
| Oil filter | 670570304 | 50 hr | Amazon eBay $16.89 PartsGeek $7.98 FridayParts $20.19 | ||
| Battery | 010422 | 250 hr | Amazon eBay $50.00 | ||
| Belt | 010421 | 250 hr | Amazon eBay | ||
| Coolant | 010420 | 250 hr | Amazon eBay FridayParts $151.60 | ||
| Oil | — | 250 hr | |||
| Spark plug | 010423 | 250 hr | Amazon eBay |
Compiled from this model's family documentation — may include parts for closely-related variants. Confirm the exact part for your serial number.
Service intervals
30| Item | Action | Hours | Months | Notes |
|---|---|---|---|---|
| Engine Oil (Isuzu) | Change | 50 hr | First service — First 50 hours (break-in period) | |
| Oil Filter Element Replacement | Replace | 500 hr | First service — Isuzu, first 50 hours and every 500 hours | |
| Engine Oil and Oil Filter (John Deere) | Change | 500 hr | 12 mo | First service — First 100 hours break-in, factory fill; do not exceed 100 hours with break-in oil |
| Check Oil Vapor Recirculation System/Non-Return Valve | Check | 250 hr | John Deere engine | |
| Engine Oil (Isuzu, MMG25IF4) | Change | 250 hr | Every 250 hours, MMG25IF4 only | |
| Change Engine Oil and Replace Oil Filter | Change | 500 hr | 12 mo | First service — John Deere; decrease to every 250 hours if not using John Deere Plus 50 II oil |
| Engine Oil (Isuzu, MMG45IF4) | Change | 500 hr | Every 500 hours, MMG45IF4 only; every 250 hours instead if harsh environment or fuel quality questioned | |
| Fuel Filter Elements (Isuzu) | Replace | 500 hr | Every 500 hours (every 250 hours if harsh environment/fuel quality questioned) | |
| Fuel Filter Elements (John Deere) | Replace | 500 hr | 12 mo | |
| Replace Engine Oil | Change | 500 hr | First service — Isuzu, every 500 hours (or every 250 hours if harsh environment/fuel quality questioned) | |
| Replace Fuel Filter Elements | Replace | 500 hr | 12 mo | John Deere engine |
| Replace Oil Vapor Recirculation Filter | Replace | 500 hr | 12 mo | John Deere engine |
| Service Battery | Other | 500 hr | 12 mo | John Deere engine |
| Water Sedimenter Element (Isuzu) | Clean | 500 hr | Every 500 hours (every 250 hours if harsh environment/fuel quality questioned) | |
| Air Cleaner Elements (John Deere) | Replace | 2000 hr | ||
| Air Filter Element (Isuzu) | Replace | 2000 hr | ||
| Alternator and Fan Belts (John Deere) | Replace | 2000 hr | ||
| Check Generator Drive Plate Torque | Check | 2000 hr | Isuzu engine | |
| Lubricate Leveling Jacks | Lubricate | 2000 hr | Isuzu engine | |
| Replace Air Cleaner Elements | Replace | 2000 hr | John Deere engine | |
| Replace Air Filter Element | Replace | 2000 hr | Isuzu engine | |
| Replace Alternator and Fan Belts | Replace | 2000 hr | John Deere engine | |
| Replace Fan Belt | Replace | 2000 hr | Isuzu engine | |
| Test Thermostats | Test | 2000 hr | John Deere engine | |
| Diesel Particulate Filter (DPF) | Other | 3000 hr | Expected service interval at least 3,000-4,500 hours depending on engine power/operating conditions; serviced by authorized provider only | |
| Exhaust Filter (DPF) Service | Other | 3000 hr | Expected service interval at least 3,000-4,500 hours based on engine power/operating conditions; serviced by authorized provider only | |
| Reset Maintenance Alarm Intervals | Other | 3000 hr | Power Zone controller maintenance alarm 3 | |
| Jack Maintenance (lubricate gearing/handle) | Lubricate | 12 mo | Perform annually | |
| Leveling Jacks | Lubricate | 12 mo | Annually | |
| Trailer Wheel Bearings Lubrication | Lubricate | 12 mo | Minimum every 12 months or 12,000 miles (19,312 km) |
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
24| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Other | Air Filter Minder Gauge Replacement Threshold | 20 | in. H2O | |
| Other | Radiator Cap Coolant Fill Clearance | 3/4 | in. | below filler neck (approx 2 cm) |
| Pressure | Loss-of-oil-pressure shutdown verification threshold | 5 | psi (34 kPa) | shut engine down immediately if pressure does not read this value within 5 seconds of restart |
| Pressure | Low Oil Pressure Shutdown Threshold | 20 | psi | |
| Pressure | Maximum trailer tire pressure | 65 | psi | |
| Pressure | Normal Operating Oil Pressure | 35-80 | psi | |
| Pressure | Oil Pressure Gauge Range | 0-100 | psi | |
| Pressure | Oil Pressure Shutdown Confirmation Threshold | 5 | psi | if not attained within 5 seconds of restart, shut engine down immediately |
| Temperature | Coolant Temperature Gauge Range | 150-250 | °F | |
| Temperature | High Coolant Temperature Shutdown Threshold | 230 | °F | |
| Temperature | High coolant temperature shutdown | 230 | °F (110°C) | stop engine immediately at or above this temperature |
| Temperature | Normal Operating Coolant Temperature | 180-200 | °F | average ambient air temperature of 70°F (21°C) |
| Torque | Generator Drive Plate Bolts | 30 | ft-lbs | |
| Torque | Generator Drive Plate Bolts | 40 | ft-lbs | |
| Torque | Generator drive plate bolts - MMG25IF4 | 30 | ft-lbs (40 Nm) | |
| Torque | Generator drive plate bolts - MMG35DF4 | 40 | ft-lbs (54 Nm) | |
| Torque | Generator drive plate bolts - MMG45IF4 | 30 | ft-lbs (40 Nm) | |
| Torque | Generator drive plate bolts - MMG55DF4 | 40 | ft-lbs (54 Nm) | |
| Torque | Trailer wheel lug nuts, first pass | 20-25 | ft-lbs (27-33 Nm) | first pass, star sequence |
| Torque | Trailer wheel lug nuts, second pass | 50-60 | ft-lbs (67-81 Nm) | second pass, star sequence |
| Torque | Trailer wheel lug nuts, third pass | 90-120 | ft-lbs (122-162 Nm) | third pass, star sequence |
| Voltage | Battery Voltage Gauge Range | 0-50 | V | |
| Voltage | Normal Battery Reading | 12-14 | V | 12 volt systems, engine running |
| Voltage | Normal Battery Reading | 24-26 | V | 24 volt systems, engine running |
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 |
|---|---|---|---|---|---|
| Engine oil | John Deere Plus 50 II (John Deere engine) | Refer to OEM engine manual for viscosity grade by season/climate | |||
| Fuel | Ultra-low-sulfur diesel | 379.0 L (100 gal total, 90 gal usable) |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Procedures
4Checking Generator Drive Plate Torque maintenance
- Disconnect engine starting battery
- Remove generator fan guard
- Tighten each drive plate bolt to specification in Table 4
- Install generator fan guard
- Connect battery
Resetting the Maintenance Alarms maintenance
- With unit shut down, move Control Power switch to ON
- Press any directional arrow to enter maintenance screens
- Press Enter and Stop/Reset simultaneously to open Configuration menu
- Move cursor down to Maintenance group
- Press right arrow to access sections and highlight Maintenance section
- Press right arrow to access parameters and highlight the alarm to reset
- Press Enter to select editable parameter, highlight Reset
- Press Enter to reset the selected alarm
- Repeat for additional alarms
- Press and hold Enter for five seconds to save changes
Towing the Unit - Wheel Lug Torque maintenance
Tools: Torque wrench
- Start all lug nuts by hand.
- First pass: tighten to 20-25 ft-lbs (27-33 Nm).
- Second pass: tighten to 50-60 ft-lbs (67-81 Nm).
- Third pass: tighten to 90-120 ft-lbs (122-162 Nm).
- Re-torque lug nuts in sequence after first road use.
Manual Starting of the Unit operation
⚠ Running engines produce carbon monoxide - asphyxiation hazard
- Move Control Power switch to ON
- Verify controller enters Stop mode/Home screen
- Press Engine Start button in Manual mode
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 Generac MMG35DF4?
The Generac MMG35DF4 is rated 31 kW standby (39.0 kVA).
What engine does the Generac MMG35DF4 use?
The Generac MMG35DF4 is powered by the John Deere 3029HFG03 engine.
What fuel does the Generac MMG35DF4 use?
The Generac MMG35DF4 runs on diesel.
What's the oil capacity on a Generac MMG35DF4?
The John Deere 3029HFG03 engine in the Generac MMG35DF4 has an oil capacity of 10.4 liters.
What alternator does the Generac MMG35DF4 use?
The Generac MMG35DF4 uses a Marathon 284CSL1542 alternator.
What oil filter fits the Generac MMG35DF4?
The Generac MMG35DF4 uses oil filter part number 670570304.
What fuel filter does the Generac MMG35DF4 use?
The Generac MMG35DF4 uses fuel filter part number 010418.
What air filter does the Generac MMG35DF4 use?
The Generac MMG35DF4 uses air filter part number 010419.
Troubleshooting
6Fault codes
| Code | Meaning | Remedy |
|---|---|---|
| 1049 VSCF | Overload RED Unit shuts down during operation. | Check the LEDs/Screen for alarms. Generator output is shorted or severely overloaded. Identify and clear the overload, and then restart. |
| 1051 VSCF | High Battery YELLOW LED illuminated in any state. | Check the LEDs/Screen for alarms. Voltage supply to the AVR is high. If an external battery charger is in use, contact installing dealer to correct installation. If an external battery charger is NOT in use, contact Independent Authorized Servicing Dealer. |
Symptoms & remedies
| Symptom | Remedy |
|---|---|
| Low Load indicator LED. • Indicates genset has operated at less than 30% capacity for more than 15 minutes. | Resolve by increasing electrical load. If unable to operate genset at more than 30% load, use a smaller generator. |
| Lug Door Open indicator LED. | Resolve by closing lug-box door. If condition remains unresolved, inspect lug-box door safety switch for proper operation. |
| Emergency Stop indicator LED. | Resolve by deactivating (pulling out) Emergency Stop switch. |
| Shutdown indicator LED. | Resolve by resolving shutdown condition. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing. Full Generac MMG35DF4 troubleshooting guide (33 entries) →
Parts
14| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 010417 | Oil and filter | 1 | Oil | Amazon eBay |
| 010418 | Fuel filter | 1 | Fuel filter | Amazon eBay $22.46 |
| 010419 | Air filter | 1 | Air filter | Amazon eBay KuduParts $147.99 |
| 010420 | Coolant and filter | 1 | Coolant | Amazon eBay FridayParts $151.60 |
| 010421 | Belt | 1 | Belt | Amazon eBay |
| 010422 | Battery service | 1 | Battery service | Amazon eBay $50.00 |
| 010423 | Spark plugs | 1 | Spark plug | Amazon eBay |
| 10000036081 | SEAL | Seal | Amazon eBay | |
| 10000047407 | GASKET, E-STOP | 1 | Gasket | Amazon eBay |
| 10000047443 | GASKET | Gasket | Amazon eBay | |
| 37145B | GASKET | Gasket | Amazon eBay | |
| 37544W | SEAL | Seal | Amazon eBay | |
| 37626B | GASKET | Gasket | Amazon eBay | |
| A0001050172 | GASKET | Gasket | 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 | 100% | 7.8 | 2.1 |
Available documents
Operator's manual (Generac)Owner's manual (Generac)Owner's manual — 36949 (Generac)Parts manual — Generac Mobile Diesel Generator Brochure (Generac)Parts manual — MMG35DF4 (Parts) [6-2021] (Generac)