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John Deere 3029T Engine

The John Deere 3029T is a 2.9-liter, 3-cylinder, heavy-duty industrial diesel engine designed for agricultural, construction, and power generation applications. As part of the John Deere PowerTech Series, it utilizes a vertical, in-line configuration and a 4-stroke cycle with direct injection. The engine features a robust design that includes replaceable "wet" cylinder liners surrounded by coolant for optimal heat dissipation and easy individual servicing. Heavy-duty pistons engineered from high-grade cast aluminum alloy feature internal ribbing and cam-ground skirts to accommodate thermal expansion during sustained load operation. A fixed geometry turbocharger enhances the engine’s volumetric efficiency, ensuring reliable power output and emissions compliance across varying altitudes and demanding load profiles.

The engine employs an overhead-valve structure (valve-in-head design) with a 2-valve per cylinder arrangement, totaling 6 valves. The valves are actuated by a traditional pushrod and rocker arm assembly driven by the camshaft. Valve clearance adjustments must be performed cold. The designated intake valve lash clearance is 0.35 mm (0.014 in). The designated exhaust valve lash clearance is 0.45 mm (0.018 in). The engine features a total displacement of 2.9 liters (179 cubic inches). The physical internal cylinder dimensions consist of a bore diameter of 106.5 mm (4.19 inches) and a stroke length of 110 mm (4.33 inches).

Fuel System: Fuel delivery is handled via a mechanical direct injection system. The core system consists of a mechanical rotary-type injection pump driven directly by the crankshaft through the timing gear train. High-pressure fuel lines deliver fuel to 9.5 mm injection nozzles mounted vertically in the cylinder head, injecting directly into the piston crown cut-out bowl for optimal atomization and combustion efficiency. The injection pump timing is set to -1 deg BTDC for standard configurations. The fuel circuit also incorporates an integrated cold start advance system that modifies injection timing to facilitate quick ignition and smooth idling during cold temperature startups.

Lubrication is managed via a pressure-regulated system utilizing an internal oil pump driven by the crankshaft gear train. The system is designed to use high-quality heavy-duty diesel oils, such as John Deere Plus-50. Under normal operating temperatures, the absolute minimum allowable oil pressure at a slow idle speed of 850 rpm is 140 kPa (20 psi). A full-flow spin-on oil filter element provides continuous filtration, and internal oil pressure regulation valves ensure uniform delivery to the main journals, connecting rod bearings, and upper valve train components.

The cooling system uses a liquid-jacketed configuration where coolant circulates directly around the individual wet cylinder liners. A centrifugal water pump circulates a recommended 50/50 mixture of water and low-silicate ethylene glycol combined with a Supplemental Coolant Additive (SCA) to prevent liner pitting, cavitation, and scale deposits. Temperature regulation is maintained by an internal wax-pellet thermostat. For service pressure testing, the cooling system cap and radiator circuit must sustain an applied test pressure of 50 kPa (7 psi) without leakage.

General Technical Data

Engine Specifications

Engine Model ............... John Deere 3029T
Engine Type ............... 4-cycle inline 3-cylinder direct injection liquid-cooled diesel
Number of Cylinders ............... 3
Cylinder Arrangement ............... In-line
Engine Bore, in (mm) ............... 4.19 (106.5)
Engine Stroke, in (mm) ............... 4.33 (110.0)
Displacement, cu.in (L) ............... 179 (2.9)
Rated Engine Power, hp (kW) ............... 48-74 (36-55)
Rated Engine Speed, rpm ............... 2200-2400
Peak Torque ............... 240-300 Nm (177-221 lb-ft) at 1400-1600 rpm
Idle Speed ............... 800-950 rpm
Aspiration Type ............... Turbocharged
Operating Speed ............... 1500-2400 rpm
Compression Ratio ............... 17.2:1-17.8:1
Firing Order ............... 1-2-3
Cylinder Block Type ............... Cast iron with replaceable wet liners
Cylinder Head Type ............... Cast iron single piece 2-valve per cylinder
Lubrication System ............... Full-pressure lubrication with gear pump
Oil Pump Type ............... Gear-driven internal assembly
Oil Filter Type ............... Full-flow, spin-on cartridge
Cooling System ............... Liquid-cooled with radiator and bypass system
Water Pump Type ............... Belt-driven centrifugal impeller
Air Cleaner Type ............... Dry type dual element heavy duty
Starting System ............... Electric starter motor axial engagement
Electrical System ............... 12V negative ground

Fuel System

Injection Pump Type ............... Rotary distributor mechanical governor
Injection Pump Model ............... Stanadyne DB2 or Delphi Lucas DP200
Fuel Transfer Pump Type ............... Mechanical diaphragm lift pump
Fuel Injection Pressure, bar (psi) ............... 450-550 (6526-7977)
Nozzle Type ............... Multi-hole orifice micro-leakage design
Governor Type ............... Mechanical centrifugal control flyweights
Fuel Filter System ............... Spin-on primary separator combined single element
Maximum Fuel Return Flow, L/h (gph) ............... 35-45 (9.2-11.8)
Fuel Timing Method ............... Dynamic pin timing lock
Fuel Transfer Pressure, kPa (psi) ............... 150-400 (21.7-58.0)
Cold Start System Type ............... Optional electrical advance solenoid unit
Shut-Off System ............... Electrical energized-to-run solenoid mechanism
Low Idle Regulation ............... Adjustable external spring stop screw unit
High Idle Regulation ............... Factory sealed maximum stop mechanism
Injection Tubing Config ............... High-pressure thick-wall seamless steel lines

Dimensions and Weight

Overall Length, in (mm) ............... 28.2 (715)
Overall Width, in (mm) ............... 20.4 (520)
Overall Height, in (mm) ............... 33.7 (855)
Dry Weight, lbs (kg) ............... 882 (400)
Wet Weight, lbs (kg) ............... 937 (425)

Maintenance Data

Service Information

Compression Pressure Range, psi (bar) ............... 350-400 (24.1-27.5)
Oil Pressure at Rated Speed, kPa (psi) ............... 275-345 (40-50)
Oil Pressure at Idle Speed, kPa (psi) ............... 105 (15.2)
Cooling System Radiator Cap Pressure, psi (kPa) ............... 10-15 (69-103)
Thermostat Start Open Temperature, F (C) ............... 180 (82.0)
Thermostat Full Open Max Temperature, F (C) ............... 202 (94.0)
Fan Drive Belt Tension Deflection, in (mm) ............... 0.5 (12.7)
Intake Valve Lash, in (mm) ............... 0.014 (0.356)
Exhaust Valve Lash, 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 ......................... CH-4
Engine Oil Capacity, Std Version, qt (L) ............... 6.3 (6.0)
Engine Oil Capacity, Deep Version, qt (L) ............... 8.5 (8.0)
Cooling System Capacity, qt (L) ............... 6.0 (5.7)

Service Intervals

Change oil and filter ............... Every 250 hours
Inspect air cleaner ............... Every 250 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) ............... 4.1929-4.1945 (106.50-106.54)
Cylinder Liner Maximum Taper, in (mm) ............... 0.0020 (0.050)
Cylinder Liner Out of Round, in (mm) ............... 0.0020 (0.050)
Cylinder Liner Minimum Wall Thickness, in (mm) ............... 0.235 (5.97)
Crankshaft Main Journal Diameter, in (mm) ............... 3.1230-3.1240 (79.324-79.350)
Crankshaft Main Bearing Oil Clearanc, in (mm) ............... 0.0018-0.0046 (0.046-0.116)
Crankpin Journal Diameter, in (mm) ............... 2.7480-2.7490 (69.799-69.825)
Crankpin Bearing Oil Clearance, in (mm) ............... 0.0015-0.0040 (0.038-0.101)
Crankshaft End Play, in (mm) ............... 0.001-0.014 (0.025-0.356)
Connecting Rod Bushing Inside Diameter, in (mm) ............... 1.6256-1.6264 (41.290-41.310)
Connecting Rod Big End Side Play, in (mm) ............... 0.003-0.009 (0.076-0.230)
Piston Skirt to Cylinder Liner Clearance, in (mm) ............... 0.0025-0.0045 (0.063-0.114)
Piston Pin Bushing Outside Diameter, in (mm) ............... 1.753-1.755 (44.526-44.577)
Piston Pin to Piston Clearance, in (mm) ............... 0.0003-0.0007 (0.007-0.017)
Piston Pin Outer Diameter, in (mm) ............... 1.6248-1.6252 (41.270-41.280)
Top Ring Groove Width, in (mm) ............... 0.156 (3.962)
Second Ring Groove Width, in (mm) ............... 0.125 (3.175)
Oil Ring Groove Width, in (mm) ............... 0.187 (4.749)
Top Ring Groove Clearance, in (mm) ............... 0.0035-0.0050 (0.089-0.127)
Second Ring Groove Clearance, in (mm) ............... 0.0020-0.0040 (0.051-0.102)
Oil Ring Groove Clearance, in (mm) ............... 0.0015-0.0035 (0.038-0.089)
Top Ring End Gap, in (mm) ............... 0.012-0.022 (0.305-0.559)
Second Ring End Gap, in (mm) ............... 0.025-0.035 (0.635-0.889)
Oil Ring End Gap, in (mm) ............... 0.010-0.020 (0.254-0.508)
Cylinder Head Deck Surface Flatness, in (mm) ............... 0.002 (0.050)
Intake Valve Stem Outer Diameter, in (mm) ............... 0.3125-0.3135 (7.937-7.962)
Exhaust Valve Stem Outer Diameter, in (mm) ............... 0.3120-0.3130 (7.925-7.950)
Valve Guide Inside Diameter, in (mm) ............... 0.3145-0.3160 (7.988-8.026)
Intake Valve Stem to Guide Clearance, in (mm) ............... 0.0010-0.0035 (0.025-0.089)
Exhaust Valve Stem to Guide Clearance, in (mm) ............... 0.0015-0.0040 (0.038-0.101)
Valve Face Angle, deg ............... 45
Valve Seat Angle, deg ............... 45
Intake Valve Head Recess Below Face, in (mm) ............... 0.024-0.042 (0.610-1.067)
Exhaust Valve Head Recess Below Face, in (mm) ............... 0.024-0.042 (0.610-1.067)
Valve Spring Free Lenght, in (mm) ............... 2.15 (54.61)
Camshaft Journal Outer Diameter, in (mm) ............... 2.164-2.165 (54.966-54.991)
Camshaft Journal Bushing Inside Diameter, in (mm) ............... 2.167-2.169 (55.042-55.093)
Camshaft Bearing Running Clearance, in (mm) ............... 0.0020-0.0050 (0.050-0.127)
Camshaft End Play, in (mm) ............... 0.0030-0.0090 (0.076-0.228)
Cam Lobe Height (Intake), in (mm) ............... 1.765 (44.83)
Cam Lobe Height (Exhaust), in (mm) ............... 1.785 (45.34)
Rocker Arm Shaft Outer Diameter, in (mm) ............... 0.785-0.786 (19.940-19.964)
Rocker Arm Bushing Inside Diameter, in (mm) ............... 0.787-0.789 (20.000-20.040)
Tappet Body Outer Shank Diameter, in (mm) ............... 0.747-0.748 (18.974-18.996)
Tappet Seating Housing Bore Cylinder Block, in (mm) ............... 0.750-0.751 (19.050-19.075)
Tappet to Block Seating Clearance, in (mm) ............... 0.002-0.004 (0.050-0.101)
Idler Gear to Injection Pump Gear Backlash, in (mm) ............... 0.0030-0.0180 (0.080-0.457)
Idler Gear to Crankshaft Gear Backlash Space, in (mm) ............... 0.0016-0.0140 (0.040-0.356)

Tightening Torques

Cylinder Head Cap Screws (1-Step), lb-ft (Nm) ............... 75 (100)
Cylinder Head Cap Screws (2-Step), lb-ft (Nm) ............... 110 (150)
Main Bearing Cap Bolts, lb-ft (Nm) ............... 100 (135)
Connecting Rod Cap Screws, lb-ft (Nm) ............... 40 (54)
Flywheel Assembly Mount Bolts, lb-ft (Nm) ............... 85 (115)
Flywheel Housing Outer Adapter Screws, lb-ft (Nm) ............... 40 (54)
Crankshaft Vibration Damper Pulley Screw, lb-ft (Nm) ............... 150 (200)
Rocker Arm Internal Support Shaft Bolt, lb-ft (Nm) ............... 35 (47)
Rocker Arm Cover Attaching Screws, lb-in (Nm) ............... 96 (11)
Camshaft Thrust Retaining Flange Plate Screws, lb-ft (Nm) ............... 35 (47)
Upper Idler Gear Support Mounting Shaft Bolt, lb-ft (Nm) ............... 80 (110)
Lower Idler Gear Retaining Anchor Mount Nut, lb-ft (Nm) ............... 80 (110)
Timing Gear Cover Outer Face Attachment Bolts, lb-ft (Nm) ............... 26 (35)
Oil Pump Internal Assembly Mount Base Bolts, lb-ft (Nm) ............... 26 (35)
Oil Pan Oil Bottom Reservoir Drain Plug, lb-ft (Nm) ............... 35 (47)
Oil Pan Perimeter Structural Attachment Bolts, lb-ft (Nm) ............... 26 (35)
Fuel Injection Pump Flange Nut Fasteners, lb-ft (Nm) ............... 20 (27)
Fuel Injection Pump Drive Gear Tapered Nut, lb-ft (Nm) ............... 60 (81)
High Pressure Fuel Line Compression Nuts, lb-ft (Nm) ............... 20 (27)
Fuel Injector Retaining Hold Down Clamp Bolt, lb-ft (Nm) ............... 26 (35)
Fuel Return Leak-Off Line Compression Screws, lb-in (Nm) ............... 84 (9.5)
Intake Manifold Structural Shell Segment Bolts, lb-ft (Nm) ............... 26 (35)
Exhaust Manifold Structural Section Shield Bolts, lb-ft (Nm) ............... 35 (47)
Turbocharger Turbine Housing Base Mount Nuts, lb-ft (Nm) ............... 35 (47)
Turbocharger Compressor Air Inlet Band Clamp, lb-in (Nm) ............... 72 (8.1)
Water Pump Assembly Housing Attachment Fasteners, lb-ft (Nm) ............... 26 (35)
Thermostat Outer Cap Housing Outlet Screws, lb-ft (Nm) ............... 26 (35)
Water Pump Drive V-Pulley Attachment Screws, lb-ft (Nm) ............... 20 (27)
Starter Motor Structural Shell Mounting Stud Nuts, lb-ft (Nm) ............... 35 (47)
Alternator Pivot Base Adjust Shell Hinge Bolts, lb-ft (Nm) ............... 35 (47)
Alternator Tension Adjustable Link Arm Screw, lb-ft (Nm) ............... 20 (27)
Oil Pressure Switch Indicator Sensor Port, lb-ft (Nm) ............... 11 (15)
Coolant Temperature Switch Sensor Housing Port, lb-ft (Nm) ............... 18 (24)
Cold Start Advance Electrical Solenoid Body, lb-ft (Nm) ............... 5 (6.8)
Aneroid Bracket Structural Support Case Screws, lb-in (Nm) ............... 45 (5)
Oil Cooler Internal Filter Base Connection Bolt, lb-ft (Nm) ............... 32 (43)
Crankcase Breather Valve Core Cover Screws, lb-in (Nm) ............... 84 (9.5)
Front Engine Mount Base Bracket Frame Bolts, lb-ft (Nm) ............... 65 (88)
Rear Engine Mount Bracket Housing Fasteners, lb-ft (Nm) ............... 65 (88)
Air Compressor Head Unit Frame Fasteners, lb-ft (Nm) ............... 35 (47)
Hydraulic Accessory Pump Drive Spline Shell Bolts, lb-ft (Nm) ............... 35 (47)
Oil Suction Tube Inner Screen Bracket Screw, lb-ft (Nm) ............... 20 (27)
Oil Pressure Relief Regulator Valve Cap plug, lb-ft (Nm) ............... 35 (47)
Fan Hub Assembly Extension Center Anchor Bolt, lb-ft (Nm) ............... 52 (70)
Crankshaft Rear Lip Seal Housing Screws, lb-ft (Nm) ............... 11 (15)
Exhaust Pipe Outlet Elbow Outer Base Nuts, lb-ft (Nm) ............... 35 (47)
Air Intake Tube Connection Clamp Adjusting Screw, lb-in (Nm) ............... 45 (5)

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• John Deere Engines Specs
  
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• John Deere 3029TF120 Specs
  
• John Deere 3029TF270 Specs
  
• John Deere 3164D Specs
  

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