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John Deere 3029DF120 Engine

The John Deere 3029DF120 is an industrial, heavy-duty 2.9-liter, 3-cylinder, 4-stroke diesel engine belonging to the PowerTech series. This engine is designed as a naturally aspirated unit utilized predominantly in standby and prime power generation systems (such as the SDMO J33 generator) as well as in diverse agricultural and construction OEM equipment. Noted for its compact footprint and robust internal architecture, it incorporates a rigid cylinder block design with replaceable wet-type cylinder liners to simplify overhaul procedures. The mechanical governor system ensures consistent stability under varying loads, emphasizing durability and reliable continuous operation in harsh industrial environments.

Valve Mechanism: Overhead Valve (OHV) arrangement operated via pushrods and rocker arms driven by a gear-train camshaft. Valves Per Cylinder: 2 valves per cylinder (1 intake, 1 exhaust; 6 valves total). Bore (Cylinder Diameter): 106.5 mm (4.19 in). Stroke (Piston Travel): 110.0 mm (4.33 in). Total Displacement: 2.91 Liters (177 cubic inches).

Fuel Injection Pump Type: High-pressure mechanical rotary or MICO in-line injection pump, depending on market variation, featuring an integrated mechanical governor for precise RPM management. Fuel Supply Parameters: Supply pressure for the rotary injection pump operates at 15-30 kPa (0.15-0.30 bar), while the MICO in-line variant functions at a higher supply line threshold of 350 kPa (3.5 bar). System Flow: Maximum fuel pump flow capacity is rated up to 111 L/h with average load consumption limits ranging from 3.6 L/h (at 50% load) to 8.3 L/h (at 110% overload conditions).

Lubrication Type: Full-pressure feed system utilizing a gear-driven oil pump with a spin-on full-flow bypass filtration arrangement. Oil Consumption Rate: Normal operation yields consumption up to 0.5% of total fuel consumed; overhaul limits are designated at 0.625%. Cooling System: Liquid-cooled, closed-loop pressurized setup utilizing an engine-driven mechanical water pump and a heavy-duty industrial radiator assembly. Maximum Ambient Air Capacity: Standard radiator integration rated for continuous operation at up to 50C (122F) ambient temperature. System Test Pressure: 70 kPa (0.7 bar / 10 psi).

General Technical Data

Engine Specifications

Engine Model ............... John Deere 3029DF120
Engine Series ............... PowerTech 2.9 L
Engine Type ............... 4-cycle inline 3-cylinder direct injection liquid-cooled diesel
Number of Cylinders ............... 3
Cylinder Arrangement ............... Vertical in-line
Engine Bore, in (mm) ............... 4.17 (106.0)
Engine Stroke, in (mm) ............... 4.33 (110.0)
Displacement, cu.in (L) ............... 177 (2.9)
Rated Power at 1500 rpm, hp (kW) ............... 42 (31)
Rated Power at 1800 rpm, hp (kW) ............... 47 (35)
Standby Power at 1500 rpm, hp (kW) ............... 42 (31)
Standby Power at 1800 rpm, hp (kW) ............... 47 (35)
Prime Power at 1500 rpm, hp (kW) ............... 31 (23)
Prime Power at 1800 rpm, hp (kW) ............... 42 (31)
Intermittent Power at 2500 rpm, hp (kW) ............... 58 (43)
Continuous Power at 2500 rpm, hp (kW) ............... 52 (39)
Peak Torque at 1400 rpm, lb-ft (Nm) ............... 143 (194)
Minimum Cranking Speed, rpm ............... 150
Low Idle Speed, rpm ............... 750-850
High Idle Speed, rpm ............... 1650-2750
Aspiration Type ............... Naturally aspirated
Compression Ratio ............... 17.8:1
Firing Order ............... 1-2-3
Direction of Crankshaft Rotation ............... Counterclockwise from flywheel end
Combustion System ............... Direct injection toroid cavity in piston
Valves per Cylinder ............... 1 intake, 1 exhaust
Cylinder Block Type ............... Cast iron mono block with wet liners
Cylinder Head Type ............... Cast iron single piece 2 valves per cylinder
Lubrication System ............... Full-pressure lubrication
Oil Pump Type ............... Gear-driven displacement pump
Oil Filter Type ............... Full-flow spin-on cartridge
Cooling System ............... Liquid-cooled pressurized circulation
Water Pump Type ............... Belt-driven centrifugal impeller
Air Cleaner Type ............... Dry dual stage element core
Starting System Type ............... Electric starter motor
Electrical System Voltage, V ............... 12 or 24
Alternator Amperage, A ............... 70 or 50

Fuel System

Fuel Injection Pump Type ............... Stanadyne DB2 mechanical rotary or Lucas CAV
Fuel Transfer Pump Type ............... Mechanical gear or diaphragm type
Fuel Transfer Pump Pressure, psi (kPa) ............... 4.0-8.0 (27.6-55.2)
Fuel Injection Nozzle Type ............... Multi-hole standard nozzle
Fuel Injection Nozzle Pressure, psi (kPa) ............... 3625-3770 (25000-26000)
Fuel Filter Type ............... Spin-on full-flow elements with water separator
Governor Type ............... Mechanical centrifugal
Fuel System Governor Regulation ............... Mechanical control linkage
Maximum Fuel Pump Inlet Restriction, in Hg (kPa) ............... 6.0 (20.3)
Maximum Fuel Return Line Restriction, in Hg (kPa) ............... 10.0 (33.9)
Total Fuel Flow at 1500 rpm, gal/hr (L/hr) ............... 17.4 (66.0)
Total Fuel Flow at 1800 rpm, gal/hr (L/hr) ............... 21.4 (81.0)
Maximum Fuel Inlet Temperature, F (C) ............... 149 (65)

Dimensions and Weight

Overall Length, in (mm) ............... 28.2 (715)
Overall Width, in (mm) ............... 20.4 (520)
Overall Height, in (mm) ............... 32.2 (820)
Dry Weight, lbs (kg) ............... 697 (316)
Wet Weight, lbs (kg) ............... 745 (338)

Maintenance Data

Service Information

Compression Pressure, psi (bar) ............... 350-400 (24.1-27.6)
Oil Pressure at Rated Speed, psi (kPa) ............... 50.0 (345)
Oil Pressure at Low Idle Speed, psi (kPa) ............... 15.0 (103)
Oil Relief Valve Opening Pressure, psi (kPa) ............... 60.0-70.0 (414-483)
Maximum Oil Temperature at Full Load, F (C) ............... 239 (115)
Thermostat Start-to-Open Temperature, F (C) ............... 180 (82)
Thermostat Fully Open Temperature, F (C) ............... 201 (94)
Cooling System Pressure Cap Rating, psi (kPa) ............... 10.0-15.0 (69-103)
Intake Valve Clearance, Cold, in (mm) ............... 0.014 (0.356)
Exhaust Valve Clearance, Cold, in (mm) ............... 0.018 (0.457)

Engine Oil and Coolant

Engine Oil Type .................. SAE 10W-30, SAE 15W-40, or JD Plus-50
API Service Classifications ......................... CK-4, CJ-4
Engine Oil Capacity with Filter, qt (L) ............... 6.3 (6.0)
Oil Pan Capacity, Low Range, qt (L) ............... 5.3 (5.0)
Engine Coolant Capacity, qt (L) ............... 4.2 (4.0)
Cooling Capacity with Radiator, qt (L) ............... 12.7 (12.0)

Service Intervals

Change oil and filter ............... Every 250 hours
Inspect air cleaner ............... Every 200 hours
Replace air cleaner ............... Every 1000 hours
Replace fuel filter ............... Every 500 hours
Valve clearance adjustment ............... Every 1000 hours
Fuel system inspection ............... Every 1000 hours
Change coolant ............... Every 2000 hours
Compression test ............... Every 1000 hours
Inspect belt tension ............... Every 250 hours

Service Specifications

Cylinder Liner Bore Inside Diameter, in (mm) ............... 4.1732-4.1748 (106.000-106.040)
Cylinder Liner Out-of-Roundness, Max Wear, in (mm) ............... 0.0015 (0.038)
Cylinder Liner Taper Max Limit, in (mm) ............... 0.0020 (0.051)
Cylinder Liner Inside Diameter, Max Wear Limit, in (mm) ............... 4.1783 (106.130)
Crankshaft Main Journal Outside Diameter, in (mm) ............... 3.1232-3.1244 (79.330-79.360)
Crankshaft End Play, in (mm) ............... 0.0010-0.0140 (0.025-0.356)
Crankpin Journal Outside Diameter, in (mm) ............... 2.7480-2.7490 (69.799-69.825)
Crankpin Bore Inside Diameter, in (mm) ............... 2.8736-2.8744 (72.990-73.010)
Main Bearing Journal Maximum Out-of-Roundness, in (mm) ............... 0.0030 (0.075)
Main Bearing Bore Inside Diameter, in (mm) ............... 3.1260-3.1275 (79.396-79.440)
Main Bearing-to-Journal Clearance, in (mm) ............... 0.0018-0.0046 (0.046-0.116)
Main Bearing Clearance, Max Wear Limit, in (mm) ............... 0.0060 (0.150)
Connecting Rod Bearing Bore Inside Diameter, in (mm) ............... 2.7504-2.7524 (69.860-69.910)
Connecting Rod Bearing-to-Journal Clearance, in (mm) ............... 0.0014-0.0043 (0.035-0.110)
Connecting Rod Small End Bushing I.D, in (mm) ............... 1.2602-1.2612 (32.010-32.036)
Connecting Rod Pin-to-Bushing Clearance, in (mm) ............... 0.0004-0.0016 (0.010-0.042)
Thrust Bearing Journal Width, in (mm) ............... 1.411-1.413 (35.84-35.89)
Thrust Bearing Shell Thickness, in (mm) ............... 0.121-0.122 (3.07-3.10)
Piston Pin Bore Inside Diameter, in (mm) ............... 1.2600-1.2603 (32.003-32.013)
Piston Pin Outside Diameter, in (mm) ............... 1.2596-1.2598 (31.994-32.000)
Piston Pin-to-Piston Bore Clearance, in (mm) ............... 0.0001-0.0007 (0.003-0.019)
Top Ring Groove Width, in (mm) ............... 0.0965-0.0980 (2.451-2.489)
Second Ring Groove Width, in (mm) ............... 0.0961-0.0969 (2.440-2.460)
Oil Ring Groove Width, in (mm) ............... 0.1386-0.1394 (3.520-3.540)
Top Ring End Gap, in (mm) ............... 0.012-0.022 (0.30-0.55)
Second Ring End Gap, in (mm) ............... 0.016-0.028 (0.40-0.70)
Oil Ring End Gap, in (mm) ............... 0.010-0.022 (0.25-0.55)
Top Ring Side Clearance, in (mm) ............... 0.005 (0.127)
Second Ring Side Clearance, in (mm) ............... 0.0024-0.0039 (0.060-0.100)
Oil Ring Side Clearance, in (mm) ............... 0.0016-0.0031 (0.040-0.080)
Intake Valve Guide Bore Inside Diameter, in (mm) ............... 0.3142-0.3154 (7.981-8.011)
Exhaust Valve Guide Bore Inside Diameter, in (mm) ............... 0.3142-0.3154 (7.981-8.011)
Intake Valve Stem Outside Diameter, in (mm) ............... 0.3118-0.3126 (7.920-7.940)
Exhaust Valve Stem Outside Diameter, in (mm) ............... 0.3110-0.3118 (7.899-7.920)
Intake Valve Stem-to-Guide Clearance, in (mm) ............... 0.0016-0.0036 (0.041-0.091)
Exhaust Valve Stem-to-Guide Clearance, in (mm) ............... 0.0024-0.0044 (0.061-0.112)
Intake Valve Face Angle, deg ............... 30
Exhaust Valve Face Angle, deg ............... 45
Intake Valve Seat Angle, deg ............... 30
Exhaust Valve Seat Angle, deg ............... 45
Valve Margin Thickness, Minimum, in (mm) ............... 0.031 (0.80)
Valve Spring Free Length, in (mm) ............... 2.12 (53.8)
Camshaft Bearing Bore I.D (First Journal), in (mm) ............... 2.2031-2.2047 (55.960-56.000)
Camshaft Bearing Bore I.D (Other Journals), in (mm) ............... 2.1642-2.1661 (54.970-55.020)
Camshaft Journal Outside Diameter (№1), in (mm) ............... 2.1996-2.2006 (55.870-55.895)
Camshaft Journal Outside Diameter (№2), in (mm) ............... 2.1602-2.1612 (54.870-54.895)
Camshaft Journal Outside Diameter (№3), in (mm) ............... 2.1209-2.1219 (53.870-53.895)
Camshaft Bearing-to-Journal Clearance, in (mm) ............... 0.0025-0.0051 (0.065-0.130)
Camshaft End Play, in (mm) ............... 0.0030-0.0095 (0.075-0.240)
Cam Lobe Height (Intake), in (mm) ............... 1.185 (30.10)
Cam Lobe Height (Exhaust), in (mm) ............... 1.168 (29.66)
Crankshaft Gear-to-Lower Idler Gear Backlash, in (mm) ............... 0.0016-0.0140 (0.040-0.350)
Lower Idler Gear-to-Oil Pump Gear Backlash, in (mm) ............... 0.0030-0.0160 (0.080-0.400)
Camshaft Drive Gear-to-Upper Idler Gear Backlash, in (mm) ............... 0.0030-0.0180 (0.080-0.450)
Injection Pump Gear-to-Upper Idler Gear Backlash, in (mm) ............... 0.0030-0.0180 (0.080-0.450)

Tightening Torques

Cylinder Head Cap Screws (1-Step), lb-ft (Nm) ............... 75 (102)
Cylinder Head Cap Screws (2-Step), lb-ft (Nm) ............... 110 (150)
Main Bearing Cap Screws, lb-ft (Nm) ............... 100 (135)
Connecting Rod Cap Bolts, lb-ft (Nm) ............... 40 (54)
Flywheel-to-Crankshaft Cap Screws, lb-ft (Nm) ............... 85 (115)
Crankshaft Pulley Damper Bolt, lb-ft (Nm) ............... 150 (203)
Rocker Arm Shaft Clamp Nut, lb-ft (Nm) ............... 35 (47)
Valve Cover Fastening Screws, lb-ft (Nm) ............... 10 (14)
Camshaft Thrust Plate Cap Screws, lb-ft (Nm) ............... 35 (47)
Camshaft Drive Gear Retention Nut, lb-ft (Nm) ............... 110 (150)
Upper Idler Gear Shaft Cap Screw, lb-ft (Nm) ............... 80 (110)
Lower Idler Gear Retention Nut, lb-ft (Nm) ............... 80 (110)
Oil Pump Assembly Flange Screws, lb-ft (Nm) ............... 26 (35)
Oil Pan Drain Plug, lb-ft (Nm) ............... 35 (47)
Oil Pan-to-Cylinder Block Screws, lb-ft (Nm) ............... 26 (35)
Fuel Injection Pump Drive Gear Nut, lb-ft (Nm) ............... 60 (81)
Fuel Injection Nozzle Clamping Nut, lb-ft (Nm) ............... 27 (37)
Fuel High Pressure Injection Line Nuts, lb-ft (Nm) ............... 20 (27)
Fuel Transfer Pump-to-Block Bolts, lb-ft (Nm) ............... 15 (20)
Exhaust Manifold Mounting Nuts, lb-ft (Nm) ............... 35 (47)
Intake Manifold Mounting Bolts, lb-ft (Nm) ............... 26 (35)
Water Pump Mounting Bolts, lb-ft (Nm) ............... 26 (35)
Thermostat Housing Cover Screws, lb-ft (Nm) ............... 26 (35)
Alternator Mounting Bracket Bolts, lb-ft (Nm) ............... 35 (47)
Starter Motor Mounting Bolts, lb-ft (Nm) ............... 35 (47)
Flywheel Housing-to-Block Fasteners, lb-ft (Nm) ............... 85 (115)
Front Plate-to-Cylinder Block Cap Screws, lb-ft (Nm) ............... 26 (35)
Timing Gear Cover-to-Front Plate Screws, lb-ft (Nm) ............... 26 (35)

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• John Deere 3164D Specs
  

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