The John Deere 3029HFG03 is a 2.9 L turbocharged & aftercooled engine rated at 1800 rpm. It powers generator sets from Generac, including the MMG35DF4 and MMG55DF4. It holds 10.4 L (2.7 gal) of oil and 17 L (4.5 gal) of coolant.
Also known as: John Deere 3029HFG03
Part of the John Deere 3029 engine family — 16 variants share parts & fitment.
| Oil capacity | 10.4 L |
|---|---|
| Coolant capacity | 17.0 L |
| Displacement | 2.9 L |
| Aspiration | Turbocharged & Aftercooled |
| Rated speed | 1800 rpm |
Compiled from service & troubleshooting documentation across every generator set that uses the John Deere 3029HFG03.
| 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.
| 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.
| 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.
Tools: Torque wrench
⚠ Running engines produce carbon monoxide - asphyxiation hazard
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
| Part # | Description | Category |
|---|---|---|
| 010419 | Air filter | air_filter |
| RE509106 | ALTERNATOR (14V, 65A) (3132) | alternator |
| RE544045 | ALTERNATOR (28V, 50A) (3131) | alternator |
| SE501346 | ALTERNATOR (REMAN FOR AL81436 OR AL207585) (14V, 55A) | alternator |
| SE501372 | ALTERNATOR (REMAN FOR TY6686) (12V, 78A) | alternator |
| SE501828 | (REMAN FOR RE533653) (3140) | alternator |
| SE501835 | ALTERNATOR (REMAN FOR RE509106) (14V, 65A) (3132) | alternator |
| 991990 | Battery disconnecter | battery |
| 010422 | Battery service | battery_service |
| 010421 | Belt | belt |
| R73784 | FAN BELT (LGTH = 1340 mm) | belt |
| R73785 | FAN BELT (LGTH = 1465 mm) | belt |
| R97939 | FAN BELT (LGTH = 1320 mm) | belt |
| RE55793 | FAN BELT (LGTH = 1300 mm) | belt |
| T20334 | FAN BELT (LGTH = 1219 mm) | belt |
| T23526 | FAN BELT (LGTH = 1257 mm) | belt |
| T24473 | FAN BELT (LGTH = 1295 mm) | belt |
| 010420 | Coolant and filter | coolant |
| 791278 | Biological hydraulic fluid Alt. 1 | fluid |
| 99000-25010 | Grease A | fluid |
| 010418 | Fuel filter | fuel_filter |
| RE60021 | FUEL FILTER | fuel_filter |
| RE62418 | FUEL FILTERS (35C4) | fuel_filter |
| SE501101 | NOZZLE (REMAN FOR RE48786) | injector |
| SE501177 | NOZZLE (REMAN FOR RE515684) (16QN) (16QP) (16SW) (16SV) (16WL) | injector |
| 010417 | Oil and filter | oil |
| DZ118286 | OIL FILTER | oil_filter |
| RE519626 | ENGINE OIL FILTER | oil_filter |
| RE533026 | FUEL FILTERS (35K6) | oil_filter |
| T19044 | OIL FILTER (FOR EXPORT) | oil_filter |
| 791275 | Sound Power level CA141 105 | other_service |
| DZ102006 | SHORT BLOCK ASSEMBLY | other_service |
| R110081 | FAN PULLEY (OD = 154 mm) | other_service |
| R110450 | CRANKSHAFT PULLEY AND DAMPER (OD = 174 mm) | other_service |
| R113425 | CRANKSHAFT PULLEY AND DAMPER (OD = 174 mm) | other_service |
| R117011 | CRANKSHAFT PULLEY AND DAMPER (OD = 140 mm) | other_service |
| R120262 | CRANKSHAFT PULLEY AND DAMPER (OD = 174 mm) | other_service |
| R133067 | CRANKSHAFT PULLEY AND DAMPER (OD = 146 mm) | other_service |
| R501213 | CRANKSHAFT PULLEY AND DAMPER (OD = 174 mm) | other_service |
| R501222 | CRANKSHAFT PULLEY AND DAMPER (OD = 140 mm) | other_service |
| R501223 | CRANKSHAFT PULLEY AND DAMPER (OD = 174 mm) | other_service |
| R547151 | CRANKSHAFT PULLEY AND DAMPER (OD = 171 mm) (1346) | other_service |
| R76979 | FAN PULLEY (OD = 135 mm) | other_service |
| R87148 | FAN PULLEY (OD = 172 mm) | other_service |
| RE502325 | SHORT BLOCK ASSEMBLY | other_service |
| RE535720 | SHORT BLOCK ASSEMBLY | other_service |
| RE59031 | CRANKSHAFT PULLEY AND DAMPER (OD = 174 mm) | other_service |
| SE501484 | COMPLETE BLOCK ASSEMBLY | other_service |
| SE501488 | COMPLETE BLOCK ASSEMBLY | other_service |
| SE501571 | CONNECTING ROD (REMAN FOR DZ104739) (4813) | other_service |
| SE501572 | CONNECTING ROD (REMAN FOR RE501675) | other_service |
| SE501573 | CONNECTING ROD (REMAN FOR RE501675) | other_service |
| DZ108524 | CRANKSHAFT PULLEY AND DAMPERT (OD=171mm) (1346) | pump |
| 99000-31110 | Sealant B | sealant |
| 010423 | Spark plugs | spark_plug |
| 09912-34510 | Special tool (A) | special_tool |
| 09913-60910 | Special tool (B) | special_tool |
| 09913-61510 | Special tool (A) for main shaft hub removal | special_tool |
| 09913-84510 | Special tool (A) for input shaft oil seal retainer | special_tool |
| 09922-85811 | Special tool (A) for upper case and shifter assembly removal | special_tool |
| DZ11008 | STARTER MOTOR (12 V, 3.4 KW) (3075) | starter |
| DZ110081 | STARTER | starter |
| DZ110082 | STARTER MOTOR (24 V, 4 KW) | starter |
| DZ129200 | STARTER | starter |
| RE501693 | STARTER MOTOR (12 V, 2.5 KW) | starter |
| RE501713 | STARTER MOTOR (12 V, 2.6 KW) | starter |
| RE507670 | STARTER MOTOR (12 V, 3.1 KW) | starter |
| RE515688 | STARTER | starter |
| RE516157 | STARTER MOTOR (12 V) | starter |
| RE519568 | STARTER MOTOR (12 V, 2.8 KW) | starter |
| RE523502 | STARTER | starter |
| RE528929 | STARTER | starter |
| RE540300 | STARTER | starter |
| RE546868 | STARTER | starter |
| RE552251 | STARTER MOTOR (24V, 3.5KW) (30CA) | starter |
| RE552252 | STARTER MOTOR (24V) (30CB) | starter |
| RE62916 | STARTER MOTOR (12 V) | starter |
| SE501400 | STARTER (REMAN FOR RE62916) (12V, 2.5KW) | starter |
| SE501401 | (REMAN FOR RE540301) (3005) | starter |
| SE501402 | (REMAN FOR RE540300) (3007) | starter |
| SE501427 | STARTER (REMAN FOR DZ110081) (12V, 3.4KW) | starter |
| SE501851 | (REMAN FOR DZ110081 OR RE507670) (12V, 3.4KW) (3075) | starter |
| SE501852 | ALTERNATOR (REMAN FOR RE516157) 12V, 3.2KW | starter |
| SE501865 | STARTER (REMAN FOR RE501693) (12V, 2.5KW) | starter |
| SE501869 | STARTER (REMAN FOR RE519568) (12 V, 3.2 KW) (3085) | starter |
| SE502286 | (REMAN FOR DZ110082) (24V, 4KW) (3092) | starter |
| 99000-32020 | Thread lock cement C | thread_lock_cement |
| SE501634 | TURBOCHARGER (REMAN FOR RE70036) | turbocharger |
| SE502214 | TURBOCHARGER (REMAN FOR RE518226) (65V6) | 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.
The John Deere 3029HFG03 engine has an oil capacity of 10.4 liters.
The John Deere 3029HFG03 has a displacement of 2.9 liters.
The John Deere 3029HFG03 powers 2 generator set(s), including Generac MMG35DF4, Generac MMG55DF4.
A commonly reported issue on generators using the John Deere 3029HFG03 is: Unit will not start in AUTO with 2-wire start signal.. Cause: See if screen says unit not activated..