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John Deere 4024HF285 Engine

The John Deere 4024HF285 is a heavy-duty, industrial PowerTech E 2.4L inline 4-cylinder, 4-cycle diesel engine. Primarily configured for generator drive and premium industrial OEM applications, this engine relies on an electronic control unit (ECU) to optimize performance, emissions compliance, and fuel efficiency. It features a fixed-geometry turbocharger and an air-to-air aftercooling system (ATAAC) to maintain strict thermal management under continuous operation.

Valve Configuration: Overhead valve (OHV) assembly. Total Valves: 8 valves (2-valve cylinder head structure: 1 intake and 1 exhaust valve per cylinder). Actuation: Driven by a gear-driven camshaft located in the cylinder block, transmitting lift through pushrods and rocker arms to the valve stems. Cylinder Bore: 86 mm (3.39 inches). Piston Stroke: 105 mm (4.13 inches). Total Displacement: 2.4 Liters (146 cubic inches). Compression Ratio: 18.2:1.

Fuel System: Electronic Unit Pump (EUP) fuel injection technology. System Operation: Solenoid-controlled unit pumps feed high-pressure mechanical injection nozzles assigned to individual cylinders. Injection timing and fuel metering duration are precisely regulated by the digital Electronic Engine Control Unit based on load and speed factors. Filtration: High-efficiency spin-on fuel filter setup including an integrated water separator to protect electronic fuel system tolerances.

Lubrication System: Full-pressure, forced lubrication via a positive-displacement gear pump. Filtration: Full-flow, spin-on oil filter element paired with an integrated oil cooler block. Lubricant Specification: Engine oil formulated to John Deere Plus-50 standard or equivalents meeting API service classifications for heavy-duty Tier 3/Stage III A engines. Maintenance Interval: Standard oil and filter replacement interval is designated at 500 hours under normal operational parameters.

Cooling System: Liquid-cooled, thermal-siphon bypass layout with an engine-driven centrifugal water pump. Charge Air Cooling: Air-to-air aftercooled (ATAAC) radiator layout, cooling incoming induction air to optimize density and lower combustion chamber temperatures. Coolant Specification: Formulated heavy-duty coolant path utilizing John Deere Cool-Gard or identical high-performance, fully formulated ethylene glycol solutions.

General Technical Data

Engine Specifications

Engine Model ............... John Deere 4024HF285
Engine Family ............... PowerTech E
Engine Type ............... 4-cycle inline 4-cylinder electronic unit pump diesel
Number of Cylinders ............... 4
Cylinder Arrangement ............... In-line
Engine Bore, in (mm) ............... 3.39 (86.0)
Engine Stroke, in (mm) ............... 4.13 (105.0)
Displacement, cu.in (L) ............... 146 (2.4)
Rated Engine Power, hp (kW) ............... 74-80 (55-60)
Rated Engine Speed, rpm ............... 1800
Standby Power, hp (kW) ............... 80 (60) at 1800 rpm
Prime Power, hp (kW) ............... 74 (55) at 1800 rpm
Low Idle Speed, rpm ............... 850-950
High Idle Speed, rpm ............... 1850-1950
Compression Ratio ............... 18.2:1
Firing Order ............... 1-3-4-2
Aspiration Type ............... Turbocharged and Air-to-Air Aftercooled
Cylinder Head Design ............... 2 valves per cylinder, cross-flow design
Cylinder Block Material ............... Cast iron
Cylinder Head Material ............... Cast iron
Lubrication System ............... Full-pressure, gear-driven pump
Oil Filter Type ............... Full-flow spin-on cartridge
Cooling System ............... Liquid-cooled with centrifugal water pump
Water Pump Type ............... Belt-driven centrifugal
Fan Drive Ratio ............... 1.25:1
Air Cleaner Type ............... Dry dual-stage element
Emission Certification ............... EPA Tier 3, EU Stage III A
Starting System ............... Electric Starter
Electrical System Voltage ............... 12V
Alternator Amperage ............... 45 A or 75 A
Starter Motor Power, hp (kW) ............... 3.35 (2.5)

Fuel System

Fuel Injection System ............... Electronic Unit Pump (EUP)
Injection Pump Model ............... Bosch electronic unit injection unit
Maximum Injection Pressure, psi (bar) ............... 23200 (1600)
Governor Type ............... Electronic engine control unit (ECU)
Fuel Transfer Pump Type ............... Mechanical gear-driven pump
Fuel Transfer Pump Pressure, psi (kPa) ............... 43-58 (300-400)
Fuel Filter Type ............... Spin-on primary with water separator
Maximum Fuel Inlet Temperature, F (C) ............... 149 (65)
Fuel Type Recommended ............... Ultra-low sulfur diesel ASTM D975 No. 2-D
Fuel Injection Timing Control ............... Electronic via ECU mapping
Number of Injection Nozzle Orifices ............... 5
Injection Nozzle Opening Pressure, psi (bar) ............... 3625 (250)

Dimensions and Weight

Engine Length, in (mm) ............... 26.1 (660)
Engine Width, in (mm) ............... 22.3 (565)
Engine Height, in (mm) ............... 30.4 (770)
Dry Weight, lbs (kg) ............... 553 (250)
Wet Weight, lbs (kg) ............... 584 (265)

Maintenance Data

Service Information

Oil Pressure at Rated Speed, psi (kPa) ............... 54±15 (375±105)
Oil Pressure at Low Idle, psi (kPa) ............... 15 (103)
Normal Coolant Operating Temperature, F (C) ............... 180-201 (82-94)
Maximum Allowable Coolant Temperature, F (C) ............... 220 (105)
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 (69)
Intake Valve Clearance (Cold), in (mm) ............... 0.014 (0.35)
Exhaust Valve Clearance (Cold), in (mm) ............... 0.018 (0.45)

Engine Oil and Coolant

Engine Oil Type .................. SAE 10W-30, SAE 15W-40, or JD Plus-50
API Service Classifications ......................... CH-4 or CI-4
Engine Oil Capacity with Filter, qt (L) ............... 8.5 (8.0)
Engine Oil Capacity, Minimum, qt (L) ............... 6.9 (6.5)
Engine Coolant Capacity, qt (L) ............... 9.0 (8.5)

Service Intervals

Change oil and filter ............... Every 500 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 3000 hours
Compression test ............... Every 1000 hours
Inspect belt tension ............... Every 250 hours

Service Specifications

Cylinder Bore Inside Diameter, in (mm) ............... 3.3858-3.3866 (86.000-86.020)
Cylinder Bore Maximum (Wear Limit), in (mm) ............... 3.3905 (86.120)
Cylinder Bore Out-of-Round Maximum, in (mm) ............... 0.0008 (0.020)
Cylinder Bore Taper Maximum, in (mm) ............... 0.0008 (0.020)
Crankshaft Main Journal Diameter, in (mm) ............... 2.7543-2.7551 (69.960-69.980)
Crankshaft Main Bearing Clearance, in (mm) ............... 0.0016-0.0035 (0.040-0.090)
Crankpin Journal Diameter, in (mm) ............... 2.2031-2.2039 (55.960-55.980)
Crankpin Bearing Clearance, in (mm) ............... 0.0014-0.0031 (0.035-0.080)
Crankshaft End Play, in (mm) ............... 0.0024-0.0087 (0.060-0.220)
Thrust Bearing Thickness, in (mm) ............... 0.0917-0.0937 (2.330-2.380)
Crankshaft Journal Out-of-Round Max, in (mm) ............... 0.0002 (0.005)
Crankshaft Journal Taper Max, in (mm) ............... 0.0002 (0.005)
Piston Skirt Diameter, in (mm) ............... 3.3819-3.3827 (85.900-85.920)
Piston to Cylinder Bore Clearance, in (mm) ............... 0.0031-0.0047 (0.080-0.120)
Piston Pin Bore Inside Diameter, in (mm) ............... 1.1815-1.1821 (30.010-30.025)
Piston Pin Diameter, in (mm) ............... 1.1807-1.1811 (29.990-30.000)
Piston Pin to Con Rod Clearance, in (mm) ............... 0.0004-0.0014 (0.010-0.035)
Piston Pin to Piston Boss Clearance, in (mm) ............... 0.0001-0.0004 (0.003-0.010)
Top Ring Groove Width, in (mm) ............... 0.0811-0.0819 (2.060-2.080)
Second Ring Groove Width, in (mm) ............... 0.0795-0.0803 (2.020-2.040)
Oil Piston Ring Groove Width, in (mm) ............... 0.1189-0.1197 (3.020-3.040)
Top Ring Side Clearance, in (mm) ............... 0.0024-0.0041 (0.060-0.105)
Second Ring Side Clearance, in (mm) ............... 0.0016-0.0033 (0.040-0.085)
Oil Ring Side Clearance, in (mm) ............... 0.0012-0.0028 (0.030-0.070)
Top Ring End Gap, in (mm) ............... 0.0098-0.0157 (0.250-0.400)
Second Ring End Gap, in (mm) ............... 0.0138-0.0217 (0.350-0.550)
Oil Ring End Gap, in (mm) ............... 0.0098-0.0197 (0.250-0.500)
Cylinder Head Flatness Maximum Distortion, in (mm) ............... 0.0012 (0.030)
Cylinder Head Total Surface Flatness, in (mm) ............... 0.0024 (0.060)
Intake Valve Stem Outer Diameter, in (mm) ............... 0.3126-0.3134 (7.940-7.960)
Exhaust Valve Stem Outer Diameter, in (mm) ............... 0.3118-0.3126 (7.920-7.940)
Valve Guide Inner Diameter, in (mm) ............... 0.3150-0.3161 (8.000-8.030)
Intake Valve Stem to Guide Clearance, in (mm) ............... 0.0016-0.0035 (0.040-0.090)
Exhaust Valve Stem to Guide Clearance, in (mm) ............... 0.0024-0.0043 (0.060-0.110)
Valve Face Angle, degrees ............... 45
Valve Seat Angle, degrees ............... 45
Valve Spring Free Length, in (mm) ............... 1.8898 (48.000)
Camshaft Journal Diameter (No. 1), in (mm) ............... 1.9665-1.9673 (49.950-49.970)
Camshaft Journal Diameter (No. 2), in (mm) ............... 1.9272-1.9280 (48.950-48.970)
Camshaft Journal Diameter (No. 3), in (mm) ............... 1.8878-1.8886 (47.950-47.970)
Camshaft Journal Diameter (No. 4), in (mm) ............... 1.8484-1.8492 (46.950-46.970)
Camshaft Bearing Inner Diameter, in (mm) ............... 1.9685-1.9701 (50.000-50.040)
Camshaft Journal Oil Clearance, in (mm) ............... 0.0012-0.0035 (0.030-0.090)
Camshaft End Play, in (mm) ............... 0.0020-0.0079 (0.050-0.200)
Cam Lobe Lift (Intake), in (mm) ............... 0.2520 (6.400)
Cam Lobe Lift (Exhaust), in (mm) ............... 0.2559 (6.500)
Rocker Arm Shaft Outer Diameter, in (mm) ............... 0.7854-0.7862 (19.950-19.970)
Rocker Arm Bushing Inner Diameter, in (mm) ............... 0.7874-0.7886 (20.000-20.030)
Rocker Arm to Shaft Clearance , in (mm) ............... 0.0012-0.0031 (0.030-0.080)
Idler Gear Bushing Inner Diameter, in (mm) ............... 1.5748-1.5760 (40.000-40.030)
Idler Gear Shaft Outer Diameter, in (mm) ............... 1.5728-1.5736 (39.950-39.970)
Idler Gear Side Play, in (mm) ............... 0.0020-0.0059 (0.050-0.150)

Tightening Torques

Cylinder Head Fasteners (Step 1), lb-ft (Nm) ............... 44 (60)
Cylinder Head Fasteners (Step 2), lb-ft (Nm) ............... 74 (100)
Cylinder Head Fasteners (Step 3), lb-ft (Nm) ............... 103 (140)
Main Bearing Cap Fasteners (Step 1), lb-ft (Nm) ............... 37 (50)
Main Bearing Cap Fasteners (Step 2), lb-ft (Nm) ............... 70 (95)
Connecting Rod Cap Fasteners (Step 1), lb-ft (Nm) ............... 26 (35)
Connecting Rod Cap Fasteners (Step 2), lb-ft (Nm) ............... 52 (70)
Flywheel Fasteners (Step 1), lb-ft (Nm) ............... 30 (40)
Flywheel Fasteners (Step 2), lb-ft (Nm) ............... 66 (90)
Crankshaft Vibration Damper Central Bolt, lb-ft (Nm) ............... 155 (210)
Flywheel Housing to Cylinder Block Fasteners, lb-ft (Nm) ............... 37 (50)
Camshaft Thrust Plate Fasteners, lb-ft (Nm) ............... 18 (24)
Camshaft Gear Fastener, lb-ft (Nm) ............... 63 (85)
Rocker Arm Shaft Brackets Fasteners, lb-ft (Nm) ............... 22 (30)
Rocker Arm Adjusting Screw Locknuts, lb-ft (Nm) ............... 20 (27)
Cylinder Head Rocker Arm Cover Fasteners, lb-ft (Nm) ............... 9 (12)
Electronic Unit Pump Mounting Stud Nuts, lb-ft (Nm) ............... 22 (30)
Fuel Injection Nozzle Clamping Bolt, lb-ft (Nm) ............... 26 (35)
High-Pressure Fuel Injection Lines Union Nuts, lb-ft (Nm) ............... 22 (30)
Fuel Transfer Pump Mounting Bolts, lb-ft (Nm) ............... 15 (20)
Exhaust Manifold Fasteners Step 1, lb-ft (Nm) ............... 11 (15)
Exhaust Manifold Fasteners Step 2, lb-ft (Nm) ............... 33 (45)
Intake Manifold Fasteners, lb-ft (Nm) ............... 22 (30)
Turbocharger Mounting Nuts, lb-ft (Nm) ............... 33 (45)
Oil Pan Drain Plug, lb-ft (Nm) ............... 37 (50)
Oil Pan Mounting Fasteners Steel Pan, lb-ft (Nm) ............... 18 (24)
Oil Pan Mounting Fasteners Cast Iron Pan, lb-ft (Nm) ............... 26 (35)
Oil Pump Assembly Mounting Fasteners, lb-ft (Nm) ............... 18 (24)
Oil Pump Cover Plate Fasteners, lb-ft (Nm) ............... 9 (12)
Oil Pressure Relief Valve Plug, lb-ft (Nm) ............... 33 (45)
Water Pump Assembly to Block Fasteners, lb-ft (Nm) ............... 18 (24)
Thermostat Housing Fasteners, lb-ft (Nm) ............... 18 (24)
Alternator Mounting Bracket Primary Bolt, lb-ft (Nm) ............... 37 (50)
Alternator Tension Link Bolt, lb-ft (Nm) ............... 18 (24)
Starter Motor Mounting Fasteners, lb-ft (Nm) ............... 37 (50)
Crankshaft Front Oil Seal Housing Fasteners, lb-ft (Nm) ............... 11 (15)
Crankshaft Rear Oil Seal Housing Fasteners, lb-ft (Nm) ............... 11 (15)
Timing Gear Cover Fasteners, lb-ft (Nm) ............... 18 (24)
Oil Cooler Core Mounting Fasteners, lb-ft (Nm) ............... 18 (24)
Oil Filter Bypass Valve Plug, lb-ft (Nm) ............... 26 (35)
Coolant Drain Plug Block Left Side, lb-ft (Nm) ............... 22 (30)
Glow Plugs Standard Thread, lb-ft (Nm) ............... 13 (18)
Electronic Control Unit Ground Stud Bolt, lb-ft (Nm) ............... 9 (12)
Crankshaft Position Sensor Retaining Screw, lb-ft (Nm) ............... 7 (9)
Camshaft Position Sensor Retaining Screw, lb-ft (Nm) ............... 7 (9)
Coolant Temperature Sensor, lb-ft (Nm) ............... 15 (20)
Oil Pressure Sensor Switch, lb-ft (Nm) ............... 11 (15)
Fuel Temperature Sensor, lb-ft (Nm) ............... 15 (20)
Intake Air Pressure Temperature Sensor, lb-ft (Nm) ............... 7 (9)
Flywheel Inspection Cover Fasteners, lb-ft (Nm) ............... 7 (9)
Front Support Engine Bracket Bolts, lb-ft (Nm) ............... 103 (140)
Rear Support Engine Bracket Bolts, lb-ft (Nm) ............... 103 (140)
Belt Tensioner Mounting Fastener, lb-ft (Nm) ............... 37 (50)
Fan Pulley Hub Assembly Shaft Nut, lb-ft (Nm) ............... 111 (150)
Aux Drive Gear Retaining Fastener, lb-ft (Nm) ............... 63 (85)
Main Oil Gallery Core Plugs Threaded, lb-ft (Nm) ............... 26 (35)

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