John Deere 4024TF270 Specifications
| Engine Model: John Deere PowerTech 4024TF270 |
| Engine Type: 4-stroke in-line 4-cylinder turbocharged liquid-cooled diesel |
| Total Displacement: 149 cu.in (2.4 L) |
| Rated Engine Power: 66 Hp (49 kW) at 2800 rpm |
| Fuel System Type: Direct Injection |
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The John Deere PowerTech 4024TF270 is a
2.4-liter, inline-four turbocharged diesel engine from the 4000 series
family, a line of powerplants engineered for compact industrial,
construction, and agricultural applications. The TF designation
indicates a turbocharged configuration with a fixed-geometry
turbocharger, distinguishing it from naturally aspirated or
variable-geometry variants within the same displacement class. This
engine was developed to meet the demand for a compact, durable, and
serviceable power unit capable of delivering reliable torque in
space-constrained equipment such as skid steer loaders, compact track
loaders, and industrial compressors.
The 4024TF270 is characterized by its cast iron cylinder block and
cylinder head, an overhead valve (OHV) valvetrain with two valves per
cylinder, and a mechanical direct injection fuel system. The engine
employs replaceable wet cylinder liners and a five-main-bearing
crankshaft, features that prioritize rebuildability and longevity in
commercial service.
Unlike electronically controlled diesel engines of the same era, the
4024TF270 retains a mechanical injection pump - Stanadyne or Denso
rotary type - which simplifies field service and eliminates reliance on
electronic control modules for basic operation. Its power rating of 49
kW at 2,800 rpm provides a balance of output and fuel efficiency suited
to intermittent and continuous industrial duty cycles.
The 4024TF270 is a four-stroke, water-cooled, turbocharged inline-four
diesel engine configured for industrial and off-highway applications.
Its compact dimensions and robust construction prioritize durability and
service access in confined equipment compartments.
Engine Type: Inline-4, 4-cycle, water-cooled, turbocharged diesel
Displacement: 2,430 cc (149.0 cu.in)
Bore and Stroke: 86.4 mm (3.40 in) x 103.9 mm (4.09 in)
Compression Ratio: 19.1:1
Valvetrain: OHV, 8-valve (2 valves per cylinder) with pushrods
Aspiration: Turbocharged, fixed-geometry (TF)
Fuel System: Mechanical direct injection, rotary distribution pump
Firing Order: 1-3-4-2
Rotation (facing flywheel): Counterclockwise
Rated Speed: 2,800 rpm
Low Idle Speed: 950 rpm
Rated Power: 49 kW (66 hp) at 2,800 rpm
Peak Torque: 206 Nm (152 lb-ft) at 1,800 rpm
Torque Rise: 20% from rated speed to peak torque
The cylinder block is manufactured from high-strength gray cast iron
using a deep-skirt design, where the cylinder walls extend below the
crankshaft centerline to provide structural rigidity under the high
cylinder pressures of turbocharged diesel operation. The block features
a closed-deck configuration, ensuring the cylinder bores are fully
supported by the water jacket structure at the top deck surface for
superior head gasket sealing.
Replaceable wet cylinder liners are employed, allowing for engine
rebuilding through liner replacement without reboring the block. The
liners are of the flange-top design, pressed into the block with a
controlled protrusion above the deck surface to ensure proper head
gasket compression. The block incorporates five main bearing webs with
two-bolt main bearing caps, each machined in situ with the block for
precise alignment. A large-capacity cast aluminum or stamped steel oil
pan is bolted to the lower crankcase.
Block Material: Cast iron
Liner Type: Replaceable, wet liners with flange top
Bore Diameter: 86.4 mm (3.40 in)
Main Bearing Caps: Cast iron, two-bolt design
The cylinder head is constructed from cast iron, matching the thermal
expansion characteristics of the block to ensure reliable head gasket
sealing across the wide temperature range of diesel operation. The head
utilizes a cross-flow design with the intake manifold on one side and
the exhaust manifold on the opposite side. The OHV valvetrain operates
eight valves - two per cylinder - via hydraulic or mechanical tappets,
pushrods, and forged steel rocker arms. Valve clearance is set manually
using adjustment screws on the rocker arms, a system requiring periodic
maintenance.
The direct injection combustion system features a centrally located
injector and a bowl-in-piston combustion chamber design that promotes
efficient air-fuel mixing. The valves are seated on hardened steel
inserts pressed into the cylinder head, with valve seats ground to a
45-degree angle for optimal sealing. The cylinder head is secured to the
block using a multi-step torque sequence to ensure uniform clamping
force distribution.
Head Material: Cast iron
Combustion Chamber: Direct injection with bowl-in-piston design
Valve Configuration: OHV, 2 valves per cylinder
Valve Diameter (Intake): 34.0 mm (1.34 in)
Valve Diameter (Exhaust): 30.0 mm (1.18 in)
Valve Stem Diameter: 8.0 mm (0.31 in)
Valve Seat Angle: 45 degrees
Valve Clearance (Cold, Intake): 0.20-0.30 mm (0.008-0.012 in)
Valve Clearance (Cold, Exhaust): 0.30-0.40 mm (0.012-0.016 in)
The 4024TF270 employs a mechanical direct injection fuel system with a
rotary distribution injection pump - Stanadyne or Denso depending on
production date and application. The injection pump is mounted on the
side of the cylinder block and driven by the engine’s gear train. The
pump performs three functions: generating injection pressure, metering
the precise quantity of fuel, and distributing fuel to each cylinder in
the correct firing order. A mechanical governor regulates fuel delivery
based on engine speed and load.
High-pressure steel injection lines connect the pump to nozzle-type
injectors mounted in the cylinder head. Each injector contains a
spring-loaded nozzle that opens at a predetermined pressure to atomize
fuel directly into the piston bowl combustion chamber. A manual primer
pump is integrated into the fuel system to facilitate bleeding air after
filter changes. A fuel filter with an integrated water separator is
mounted in the fuel supply line.
Injection Type: Mechanical direct injection
Injection Pump: Rotary distribution pump (Stanadyne or Denso)
Injection Timing: 12-14 degrees before top dead center
Injection Pressure (nozzle opening): 20.0-22.0 MPa (2,900-3,190 psi)
Fuel Requirement: Diesel fuel with minimum cetane number of 45
Fuel Filter: Replaceable cartridge type with water separator
The lubrication system is a fully pressurized, wet-sump design utilizing
a gear-type oil pump mounted to the front of the crankshaft. The oil
pump draws lubricant from a stamped steel or cast aluminum oil pan
through a mesh strainer and circulates it through a full-flow,
replaceable oil filter before entering the main oil gallery.
From the gallery, pressurized oil is distributed to the crankshaft main
bearings, connecting rod bearings, camshaft bearings, and timing gear
train. A pressure relief valve maintains system pressure within
operational limits to prevent over-pressurization during cold starts.
The oil pan incorporates a drain plug for service access. The system is
designed for the sustained load conditions of industrial and
construction equipment.
Oil Type: Diesel-rated SAE 15W-40 (API CH-4, CI-4, or higher)
Oil Capacity (with filter): 8.5 liters (9.0 US qt)
Oil Pressure (at rated speed): 276-345 kPa (40-50 psi)
Oil Pressure (at idle): 69 kPa (10 psi) minimum
Oil Pump Type: Gear-type, crankshaft-driven
The cooling system is a pressurized, liquid-cooled design engineered to
manage the thermal load of a turbocharged diesel engine in compact
industrial equipment. A cross-flow radiator with a mechanical or
electric fan provides cooling capacity. A centrifugal-type water pump,
driven by the accessory belt, circulates coolant through the cylinder
block, cylinder head, and the turbocharger bearing housing on certain
configurations.
A wax-pellet thermostat regulates coolant flow to maintain optimal
operating temperature, with a bypass circuit that allows rapid warm-up.
The cooling system is designed for the confined engine compartments
common in skid steer and compact track loader applications. A coolant
recovery tank is integrated to maintain system pressure and prevent
coolant loss.
Coolant Type: Ethylene-glycol based antifreeze with corrosion inhibitors
Coolant Capacity (engine only): 4.1 liters (4.3 US qt)
Thermostat Opening Temperature: 82 °C (180 °F)
Thermostat Full-Open Temperature: 95 °C (203 °F)
Radiator Cap Pressure: 69-103 kPa (10-15 psi)
Water Pump Type: Centrifugal, belt-driven
| Intake and Exhaust Systems |
Intake System: Air is drawn through a heavy-duty dry-type paper element
air filter with a restriction indicator before entering the turbocharger
compressor. Compressed air passes through an optional air-to-air
intercooler on certain equipment configurations before entering the
intake manifold.
Exhaust System: Cast iron exhaust manifold with integrated turbocharger
mounting flange. The exhaust system is designed for industrial
applications with provisions for spark arrestor mufflers where
required.
Turbocharger: Fixed-geometry, single-scroll turbocharger with a
wastegate control system. The turbocharger is mounted on the exhaust
manifold and is oil-cooled only (no water cooling). Maximum boost
pressure is approximately 0.7-0.9 bar (10-13 psi).
Timing Drive: The camshaft and injection pump are driven directly by a
train of precision-cut gears from the crankshaft. The gear train is
housed in a cast iron front cover and requires no periodic replacement.
This gear-driven system provides permanent timing synchronization and
eliminates belt or chain service intervals.
Overall Length: 651 mm (25.6 in)
Overall Width: 503 mm (19.8 in)
Overall Height: 769 mm (30.3 in)
Dry Weight (complete engine): 231 kg (509 lb)
Oil Change Interval: 250 hours under normal operating conditions.
Oil Change Interval: 150 hours under severe conditions.
Oil Filter Change: At every oil change.
Engine Coolant Replacement: 1,000 hours or 12 months.
Fuel Filter Replacement: 500 hours or as indicated by water separator
inspection.
Fuel Water Separator Drain: Every 100 hours to remove accumulated water.
Intake Valve Clearance: 0.20-0.30 mm (0.008-0.012 in) cold.
Exhaust Valve Clearance: 0.30-0.40 mm (0.012-0.016 in) cold.
Valve Clearance Adjustment: Inspect and adjust every 500 hours.
Air Filter Replacement: As indicated by restriction indicator; inspect
every 100 hours.
Drive Belt Inspection: Every 250 hours for tension, cracking, and
glazing.
Cylinder Head Bolts, 1st pass: 40 Nm (30 lb-ft).
Cylinder Head Bolts, 2nd pass: 60 Nm (44 lb-ft).
Cylinder Head Bolts, 3rd pass: 80 Nm (59 lb-ft) + 90° rotation.
Main Bearing Cap Bolts, 1st pass: 30 Nm (22 lb-ft).
Main Bearing Cap Bolts, 2nd pass: 50 Nm (37 lb-ft) + 90° rotation.
Connecting Rod Cap Bolts, 1st pass: 30 Nm (22 lb-ft).
Connecting Rod Cap Bolts, 2nd pass: 45 Nm (33 lb-ft) + 90° rotation.
Rocker Arm Shaft Bolts: 25-30 Nm (18-22 lb-ft).
Intake Manifold Bolts: 20-25 Nm (15-18 lb-ft).
Exhaust Manifold Nuts: 25-30 Nm (18-22 lb-ft).
Oil Pan Bolts: 15-20 Nm (11-15 lb-ft).
Water Pump Bolts: 20-25 Nm (15-18 lb-ft).
Injection Pump Mounting Nuts: 25-30 Nm (18-22 lb-ft).
Injection Line Nuts: 20-25 Nm (15-18 lb-ft).
Flywheel Bolts: 95 Nm (70 lb-ft).
Crankshaft Pulley Bolt: 200-250 Nm (148-184 lb-ft).
The John Deere 4024TF270 engine was utilized across a range of compact
construction, industrial, and agricultural equipment, serving as a power
unit for original equipment manufacturers and John Deere’s own equipment
lines.
John Deere Skid Steer Loaders: 317, 320 models.
John Deere Compact Track Loaders: 319, 323 models.
John Deere Compact Utility Tractors: 4-Series and select 5-Series
applications.
Sullair Portable Air Compressors: 185-250 CFM compressor models.
Ingersoll Rand Portable Air Compressors: Light tower and compressor
applications.
Light Towers: Various manufacturer applications requiring 49 kW power
rating.
Industrial Power Units: Stationary and mobile industrial equipment.
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