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John Deere 4024HF295 Engine

The John Deere 4024HF295 is an industrial diesel engine belonging to the PowerTech E 2.4L family. It is engineered primarily for heavy-duty off-highway industrial and generator drive applications. Utilizing a heavy-duty, inline four-cylinder architecture, this engine integrates advanced electronic controls to deliver a reliable power profile while adhering to environmental compliance standards, including EPA Tier 3 and EU Stage III A certifications. Its design targets applications demanding continuous torque or constant speed parameters under fluctuating load variables.

The cylinder head uses an overhead valve layout with 2 valves per cylinder (a single intake valve and a single exhaust valve). The assembly operates via traditional mechanical pushrods driven by a block-mounted camshaft, managing optimized gas exchange and combustion stability. Cylinder Arrangement: 4 cylinders in-line. Bore: 86 mm (3.39 in). Stroke: 105 mm (4.13 in). Total Displacement: 2.4 liters (146 cu in). Compression Ratio: 18.2:1.

Fuel System: Fuel induction uses an Electronic Unit Pump (EUP) direct-injection system. Individual unit injection pumps correspond to each cylinder and are actuated directly via mechanical profiles on the engine camshaft. High-pressure steel lines route the pressurized diesel from these unit pumps to precise multi-orifice fuel injection nozzles. Injection timing and duration parameters are monitored and modulated dynamically by a John Deere Electronic Engine Control unit (ECU). Fuel delivery cleanliness is maintained through a combined spin-on primary water separator and secondary fine-filtration assembly.

Lubrication System: The forced-lubrication system employs a gear-driven oil pump that draws lubricant through an integrated pickup tube from the oil pan. The pressurized oil flows through a dedicated oil cooling assembly before passing through a spin-on full-flow filtration unit. Cross-drilled galleries channel structural oil feeds directly to the main bearings, connecting rod journals, and overhead valve train components.

Cooling System: Engine thermal regulation relies on a closed-circuit liquid cooling layout managed by a heavy-duty, belt-driven centrifugal water pump. The coolant path covers internal engine jacket spaces around the cylinders and cylinder head structure. Charge air cooling is facilitated via an Air-to-Air Aftercooled (AAAC) system, routing compressed turbocharger output through a heat exchanger to lower air intake temperatures before entering the cylinders.

General Technical Data

Engine Specifications

Engine Model ............... John Deere 4024HF295
Engine Type ............... 4-cycle inline 4-cylinder direct injection liquid-cooled 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) ............... 149 (2.44)
Rated Engine Power, hp (kW) ............... 60-82 (45-61)
Rated Engine Speed, rpm ............... 2400-2800
Peak Torque ............... 162-206 lb-ft (220-280 Nm) at 1500-1800 rpm
Low Idle Speed, rpm ............... 900-1000
High Idle Speed, rpm ............... 2600-2850
Aspiration Type ............... Turbocharged and air-to-air aftercooled
Compression Ratio ............... 18.2:1
Firing Order ............... 1-3-4-2
Combustion Chamber ............... Direct injection bowl-in-piston config
Camshaft Drive ............... Gear-driven train from crankshaft gear
Valve Train ............... Overhead valve pushrod actuated layout
Cylinder Block Type ............... Cast iron mono-block
Cylinder Head Type ............... Cast iron 2-valve per cylinder design
Lubrication System ............... Full-pressure system with oil cooler
Oil Pump Type ............... Gear-driven trochoid style pump
Oil Filter Type ............... Full-flow, spin-on single element cartridge
Cooling System ............... Liquid-cooled with bypass thermostat
Water Pump Type ............... Belt-driven, centrifugal impeller type
Air Cleaner Type ............... Dry-type dual element with safety core
Starting System ............... Electric starter motor assembly
Electrical System, V ............... 12
Alternator Rating, A ............... 75
Starter Motor Power, hp (kW) ............... 2.9 (2.2)

Fuel System

Fuel Injection Pump Type ............... Electronic Unit Pump EUP system
Fuel Injection System Control ............... Electronic control unit managed solenoid actuators
Maximum Injection Pressure, psi (bar) ............... 17400 (1200)
Fuel Transfer Pump Type ............... Mechanical gear-driven diaphragm pump assembly
Fuel Transfer Pump Pressure, psi (bar) ............... 3.6-5.8 (0.25-0.40)
Fuel Filter Type ............... Spin-on element with built-in water separator
Governor Type ............... Electronic engine control unit ECU
Fuel Injection Nozzle Type ............... Multi-hole nozzle tip design
Number of Holes per Injection Nozzle ............... 5
Injection Nozzle Opening Pressure, psi (bar) ............... 3625 (250)
Fuel Grade Recommendation ............... Ultra-low sulfur diesel ASTM D975 No. 2-D
Biodiesel Blend Capacity Max ............... B20 compliant with approved additives
Fuel Rail Type ............... Low-pressure supply manifold integrated in block
Fuel Injection Lines Tube Wall Core Thickness, in (mm) ............... 0.078 (2.00)
Fuel Pump Drive Cam Lobe Total Lift Value, in (mm) ............... 0.315 (8.00)
Fuel Feed Gallery Internal Port Bored Diameter, in (mm) ............... 0.394 (10.00)
Fuel Return Spill Port Internal Bored Diameter, in (mm) ............... 0.315 (8.00)

Dimensions and Weight

Overall Length, in (mm) ............... 26.1 (660)
Overall Width, in (mm) ............... 22.3 (565)
Overall Height, in (mm) ............... 30.4 (770)
Dry Weight, lbs (kg) ............... 554 (251)
Wet Weight, lbs (kg) ............... 584 (265)

Maintenance Data

Service Information

Oil Pressure at Low Idle Speed, psi (kPa) ............... 36 (250)
Oil Pressure at Rated Speed, psi (kPa) ............... 46-55 (320-380)
Thermostat Opening Temperature, F (C) ............... 180 (82)
Thermostat Full Open Temperature, F (C) ............... 201 (94)
Maximum Allowable Coolant Temperature, F (C) ............... 221 (105)
Intake Valve Clearance, in (mm) ............... 0.014 (0.36)
Exhaust Valve Clearance, in (mm) ............... 0.018 (0.46)

Engine Oil and Coolant

Engine Oil Type .................. SAE 10W-30, SAE 15W-40, or JD Plus-50
API Service Classifications ......................... CI-4 or CJ-4
Engine Oil Capacity with Filter, qt (L) ............... 8.5 (8.0)
Engine Oil Capacity without Filter, qt (L) ............... 7.4 (7.0)
Cooling System Capacity, qt (L) ............... 2.7 (2.6)

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 2000 hours
Compression test ............... Every 1000 hours
Clean radiator core ............... Every 250 hours
Inspect belt tension ............... Every 250 hours

Service Specifications

Cylinder Liner Bore Inner Diameter, in (mm) ............... 3.385-3.387 (85.98-86.03)
Cylinder Block Deck Surface Flatness, in (mm) ............... 0.002 (0.05)
Cylinder Liner Out of Round Maximum, in (mm) ............... 0.002 (0.05)
Cylinder Head Deck Bottom Surface Flatness, in (mm) ............... 0.0015 (0.038)
Crankshaft Main Journal Diameter, in (mm) ............... 2.754-2.755 (69.96-69.98)
Crankpin Journal Diameter, in (mm) ............... 2.204-2.205 (55.98-56.00)
Crankshaft End Play Clearance, in (mm) ............... 0.003-0.010 (0.07-0.25)
Main Bearing Clearance, in (mm) ............... 0.0015-0.0035 (0.038-0.089)
Main Bearing Shell Thickness, in (mm) ............... 0.078 (2.00)
Connecting Rod Shell Thickness, in (mm) ............... 0.063 (1.60)
Connecting Rod Bearing Clearance, in (mm) ............... 0.0014-0.0033 (0.035-0.084)
Connecting Rod Big End Bore Diameter, in (mm) ............... 2.342-2.343 (59.49-59.51)
Connecting Rod Journal Side Play, in (mm) ............... 0.006-0.014 (0.15-0.35)
Piston Skirt Outer Diameter, in (mm) ............... 3.382-3.383 (85.90-85.93)
Piston to Cylinder Wall Clearance, in (mm) ............... 0.0031-0.0047 (0.080-0.120)
Piston Pin Outer Diameter, in (mm) ............... 1.181-1.182 (30.00-30.01)
Piston Pin to Connecting Rod Bushing Clearance, in (mm) ............... 0.0006-0.0012 (0.015-0.030)
Piston Pin to Piston Pin Bore Clearance, in (mm) ............... 0.0002-0.0006 (0.005-0.015)
Top Ring Groove Side Clearance, in (mm) ............... 0.0024-0.0040 (0.060-0.102)
Second Ring Groove Side Clearance, in (mm) ............... 0.0016-0.0032 (0.040-0.082)
Oil Ring Groove Side Clearance, in (mm) ............... 0.0012-0.0028 (0.030-0.070)
Top Ring End Gap, in (mm) ............... 0.010-0.018 (0.25-0.45)
Second Ring End Gap, in (mm) ............... 0.014-0.024 (0.35-0.60)
Oil Ring End Gap, in (mm) ............... 0.010-0.020 (0.25-0.50)
Intake Valve Stem Outer Diameter, in (mm) ............... 0.312-0.313 (7.92-7.95)
Exhaust Valve Stem Outer Diameter, in (mm) ............... 0.311-0.312 (7.90-7.93)
Intake Valve Guide Inner Diameter, in (mm) ............... 0.315-0.316 (8.00-8.03)
Exhaust Valve Guide Inner Diameter, in (mm) ............... 0.315-0.316 (8.00-8.03)
Intake Valve Stem to Guide Clearance, in (mm) ............... 0.0016-0.0031 (0.040-0.080)
Exhaust Valve Stem to Guide Clearance, in (mm) ............... 0.0024-0.0039 (0.060-0.100)
Intake Valve Face Recess Depth, in (mm) ............... 0.024-0.039 (0.60-1.00)
Exhaust Valve Face Recess Depth, in (mm) ............... 0.024-0.039 (0.60-1.00)
Valve Spring Free Length, in (mm) ............... 1.85 (47.0)
Camshaft Journal Diameter (№1), in (mm) ............... 1.965-1.966 (49.91-49.94)
Camshaft Journal Diameter (№2), in (mm) ............... 1.946-1.947 (49.43-49.46)
Camshaft Journal Diameter (№3), in (mm) ............... 1.926-1.927 (48.92-48.95)
Camshaft Journal Diameter (№4), in (mm) ............... 1.906-1.907 (48.41-48.44)
Camshaft End Play, in (mm) ............... 0.003-0.009 (0.08-0.23)
Camshaft Bearing Clearance, in (mm) ............... 0.001-0.004 (0.025-0.102)
Cam Lobe Lift (Intake), in (mm) ............... 0.268 (6.81)
Cam Lobe Lift (Exhaust), in (mm) ............... 0.265 (6.73)
Rocker Arm Shaft Outer Diameter, in (mm) ............... 0.748-0.749 (19.00-19.02)
Rocker Arm Bushing Inner Diameter, in (mm) ............... 0.751-0.752 (19.07-19.10)
Crankshaft Gear to Camshaft Gear Backlash, in (mm) ............... 0.002-0.006 (0.050-0.152)
Camshaft Gear to Injection Pump Gear Backlash, in (mm) ............... 0.002-0.007 (0.050-0.178)

Tightening Torques

Cylinder Head Cap Screws (Step 1), lb-ft (Nm) ............... 52 (70)
Main Bearing Cap Bolts (Step 1), lb-ft (Nm) ............... 37 (50)
Main Bearing Cap Bolts (Step 2), lb-ft (Nm) ............... 74 (100)
Connecting Rod Bolts (Step 1), lb-ft (Nm) ............... 20 (27)
Connecting Rod Bolts (Step 2), lb-ft (Nm) ............... 55 (75)
Flywheel Mounting Screws (Step 1), lb-ft (Nm) ............... 30 (40)
Flywheel Mounting Screws (Step 2), lb-ft (Nm) ............... 85 (115)
Flywheel Housing Cap Screwsl, lb-ft (Nm) ............... 37 (50)
Crankshaft Pulley Vibration Damper Bolt, lb-ft (Nm) ............... 96 (130)
Camshaft Thrust Plate Retaining Screws, lb-ft (Nm) ............... 26 (35)
Camshaft Drive Gear Mounting Hub Bolt, lb-ft (Nm) ............... 59 (80)
Rocker Arm Shaft Support Brackets Bolts, lb-ft (Nm) ............... 26 (35)
Rocker Arm Adjustment Locknut, lb-ft (Nm) ............... 20 (27)
Cylinder Head Rocker Arm Valve Cover Screws, lb-ft (Nm) ............... 11 (15)
Oil Pan Base Drain Plug Fastener Screw, lb-ft (Nm) ............... 37 (50)
Oil Pan Mounting Frame Cap Screws, lb-ft (Nm) ............... 26 (35)
Oil Pump Assembly Back Cover Bolts, lb-ft (Nm) ............... 11 (15)
Oil Pump Body to Cylinder Block Mounting Screws, lb-ft (Nm) ............... 26 (35)
Oil Pressure Regulator Plug Housing Cap Nut, lb-ft (Nm) ............... 33 (45)
Oil Cooler Core Matrix Housing Screws, lb-ft (Nm) ............... 26 (35)
Water Pump Assembly to Block Screws, lb-ft (Nm) ............... 26 (35)
Thermostat Housing Cover Cap Screws, lb-ft (Nm) ............... 26 (35)
Electronic Unit Pump EUP Mounting Nuts, lb-ft (Nm) ............... 22 (30)
Fuel Injection Nozzle Clamping Bracket Bolt, lb-ft (Nm) ............... 26 (35)
Fuel High Pressure Lines Delivery Flare Nut, lb-ft (Nm) ............... 22 (30)
Fuel Transfer Supply Pump Cap Screws, lb-ft (Nm) ............... 15 (20)
Fuel Filter Header Base Bracket Bolts, lb-ft (Nm) ............... 26 (35)
Exhaust Manifold Retention Nuts (Step 1), lb-ft (Nm) ............... 15 (20)
Exhaust Manifold Retention Nuts (Step 2), lb-ft (Nm) ............... 33 (45)
Intake Manifold Header Plenum Bolts, lb-ft (Nm) ............... 26 (35)
Turbocharger Turbine Housing to Block Nuts, lb-ft (Nm) ............... 33 (45)
Turbocharger Oil Feed Supply Hose Pipe Union, lb-ft (Nm) ............... 18 (25)
Turbocharger Oil Return Drain Line Screws, lb-ft (Nm) ............... 11 (15)
Alternator Pivot Mount Bracket Support Bolt, lb-ft (Nm) ............... 37 (50)
Alternator Belt Tension Adjusting Bracket Screw, lb-ft (Nm) ............... 22 (30)
Electric Starter Flange Assembly Mounting Bolts, lb-ft (Nm) ............... 59 (80)
Engine Front Mounting Bracket Base Steel Bolts, lb-ft (Nm) ............... 74 (100)
Engine Rear Support Mounting Base Lug Bolts, lb-ft (Nm) ............... 74 (100)
Crankcase Breather Valve Assembly Screws, lb-ft (Nm) ............... 7 (10)
Crankshaft Rear Oil Seal Housing Screws, lb-ft (Nm) ............... 11 (15)
Timing Gear Case Cover Cap Screws (M8), lb-ft (Nm) ............... 26 (35)
Timing Gear Case Cover Cap Screws (M10), lb-ft (Nm) ............... 48 (65)
Flywheel Housing Cover Access Port Plug, lb-ft (Nm) ............... 7 (10)
Oil Pressure Sensor Sender Switch Unit, lb-ft (Nm) ............... 11 (15)
Coolant Temperature Sensor Sender Unit, lb-ft (Nm) ............... 15 (20)
Camshaft Crankshaft Position Sensors, lb-ft (Nm) ............... 7 (10)
Intake Air Temperature Sensor, lb-ft (Nm) ............... 15 (20)
Exhaust Gas Temperature Probe Fitting Nut, lb-ft (Nm) ............... 22 (30)
Electronic Control Unit Frame Mount Screws, lb-ft (Nm) ............... 7 (10)
Fuel Injection Harness Internal Connector Nut, lb-ft (Nm) ............... 11 (15)
Belt Tensioner Spring Arm Pivot Assembly Bolt, lb-ft (Nm) ............... 37 (50)
Fan Drive Pulley Assembly Centered Nut, lb-ft (Nm) ............... 59 (80)
Piston Cooling Oil Jet Nozzle Core Screws, lb-ft (Nm) ............... 11 (15)
Oil Suction Tube Screen Strainer Flange Bolts, lb-ft (Nm) ............... 11 (15)

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