John Deere 4045HF285 Specifications
| Engine Model: John Deere PowerTech Plus 4045HF285 |
| Engine Type: 4-stroke in-line 4-cylinder turbocharged liquid-cooled diesel |
| Total Displacement: 275 cu.in (4.5 L) |
| Rated Engine Power: 99-173 Hp (74-129 kW) at 2000-2400 rpm |
| Fuel System Type: Common Rail Direct Injection |
____________________________________________________________________________________
The John Deere 4045HF285 is a 4.5-liter,
4-cylinder diesel engine from the PowerTech Plus family. This model
represents a high-performance industrial variant engineered for Tier 4
Interim / Stage IIIB emissions compliance. The HF285 designation
indicates a high-power density configuration, utilizing advanced
technologies to deliver substantial output from a compact, naturally
balanced inline-four architecture.
A key engineering feature is the use of replaceable wet-type cylinder
liners, distinguishing this engine from parent-bore designs and allowing
for service life extension. The combination of a high-pressure common
rail (HPCR) fuel system, a full-authority electronic control unit (ECU),
and a robust cylinder block makes this powerplant suitable for sustained
operation in construction, agricultural, and industrial environments
where reliability under variable loads is mandatory.
Engine Type: 4-cycle, inline, 4-cylinder diesel
Displacement: 4.5 L (275 cu.in)
Bore x Stroke: 106 mm x 127 mm (4.19 in x 5.00 in)
Aspiration: Turbocharged with air-to-air aftercooling
Valvetrain: 4 valves per cylinder (16 total)
Compression Ratio: 17.0:1
Cylinder Liners: Replaceable wet-type, centrifugally cast iron
Rated Power (Intermittent): 74-129 kW (99-173 hp) at 2000-2400 rpm
Peak Torque: Up to 635 Nm (468 lb-ft) at 1400 to 1600 rpm
Rated Speed: 2000 to 2400 rpm
Low Idle Speed: 850 to 950 rpm, adjustable via ECU programming
Emissions Standard: EPA Tier 4 Interim / EU Stage IIIB
The cylinder block is manufactured from high-strength gray cast iron
using a deep-skirt design. This configuration extends the block walls
below the crankshaft centerline, providing superior rigidity and
reducing bore distortion under high cylinder pressures. The block
accepts four individual replaceable wet-type cylinder liners. These
liners are centrifugally cast for uniform material density and are
replaceable without removing the engine from the equipment frame.
The water jacket surrounds the entire liner length, providing even
cooling distribution. The block incorporates an integrated crankcase
ventilation gallery and mounting bosses for ancillary equipment such as
hydraulic pumps and air compressors. Six main bearing bulkheads with
cross-bolted caps on the lower bedplate reinforce the bottom end.
The cylinder head is a single-piece, heat-treated aluminum alloy
casting. The overhead camshaft design uses a four-valve-per-cylinder
arrangement, with two intake and two exhaust valves. Valves are arranged
in a cross-flow pattern, with intake ports on one side and exhaust ports
on the opposite side to optimize volumetric efficiency and thermal
management. The intake valves are 37 mm (1.46 in) in diameter, while the
exhaust valves are 32 mm (1.26 in) in diameter.
Exhaust valves are filled with sodium to conduct heat away from the
valve face to the stem guide. The valve actuation system uses
roller-type cam followers and hydraulic lash adjusters, eliminating the
requirement for periodic valve clearance checks. The cylinder head
gasket is a multi-layer steel (MLS) design, employing three layers of
embossed stainless steel with a Viton coating for sealing high cylinder
pressures.
The fuel system is a high-pressure common rail (HPCR) system with full
electronic control. A gear-type high-pressure pump, driven directly from
the front gear train, generates fuel pressures up to 1800 bar (26,107
psi). This pressurized fuel feeds a common rail accumulator mounted
centrally on the cylinder head. Solenoid-actuated injectors are used,
with each injector calibrated specifically to its cylinder.
The engine control unit (ECU) commands injection events across multiple
stages per combustion cycle: up to five pilot injections for noise
reduction, a main injection for power delivery, and post-injections for
diesel particulate filter regeneration. The system utilizes a fuel
temperature sensor, a rail pressure sensor, and an inlet metering valve
to regulate pressure precisely. A fuel cooler is integrated into the
return line for applications operating in high ambient temperatures.
The lubrication system is a forced-feed, full-flow pressurized system
using a high-efficiency gear-type oil pump. The pump is mounted
externally on the front timing gear cover and driven directly by the
crankshaft gear. Oil is drawn through a suction strainer positioned
within the oil pan. The oil filter is a spin-on, full-flow type with a
cellulose-synthetic media rated for 15-micron particle capture. An
integral bypass valve opens at a differential pressure of 2.1 bar (30
psi) to maintain flow if the filter becomes restricted.
The system includes a water-cooled oil cooler, mounted to the side of
the cylinder block, which uses engine coolant to stabilize oil
temperature. A piston cooling gallery directs pressurized oil through
nozzle jets that spray the underside of each piston crown. Oil pan
capacities range from 12.0 to 14.7 L (12.7 to 15.5 qt) based on pan
depth and equipment mounting angle requirements. Operating oil pressure
at rated speed is 2.4 to 3.4 bar (35 to 50 psi).
The cooling system is a sealed, pressurized system with a centrifugal
water pump driven by the engine’s accessory drive belt. The thermostat
is a wax-pellet design with a rated opening temperature of 82°C (180°F)
and a fully open position at 95°C (203°F). The system uses a cross-flow
radiator configuration with a separate coolant reservoir for degassing.
Coolant flow direction routes through the cylinder block first, up
through the wet liners into the cylinder head, and then through the
external oil cooler before returning to the radiator. A coolant
temperature sensor at the cylinder head outlet provides data to the ECU
for fuel rate and EGR control. The engine-only coolant capacity is 8.5 L
(9.0 qt). A coolant filter with a corrosion inhibitor additive cartridge
is available for severe-duty applications.
Timing Drive: A front-mounted gear train drives the camshaft,
high-pressure fuel pump, oil pump, and water pump. All gears are
case-hardened steel with helical cut teeth for quiet operation. No
timing chains or belts are used.
Crankcase Ventilation: A closed crankcase ventilation (CCV) system
routes blow-by gases through a cyclone separator to remove oil mist. The
cleaned gases are returned to the intake air system upstream of the
turbocharger.
Turbocharger: A fixed-geometry turbocharger with a wastegate is used.
The wastegate is pneumatically actuated and controlled by the ECU via a
solenoid valve to limit maximum boost pressure. Maximum boost pressure
at rated power is 2.2 bar (32 psi) gauge.
Electrical System: Available in 12-volt or 24-volt configurations. The
12-volt system uses a 120-amp alternator and a 1.8 kW starter motor. The
24-volt system uses a 75-amp alternator and a 3.5 kW starter motor. Glow
plugs are ceramic-type, powered by a separate controller that pre-heats
for a maximum of 8 seconds at 0°C (32°F).
Exhaust Aftertreatment: The engine is equipped with a diesel oxidation
catalyst (DOC) and a diesel particulate filter (DPF). A regeneration
switch permits operator-initiated parked regeneration. No selective
catalytic reduction (SCR) is required for Tier 4 Interim compliance.
Dry Weight: 491 kg (1082 lb)
Length (front to rear): 867 mm (34.1 in)
Width (extreme, including exhaust manifold): 625 mm (24.6 in)
Height (from oil pan rail to rocker cover top): 1027 mm (40.4 in)
Engine Oil Capacity (with filter): 12.0 to 14.7 L (12.7 to 15.5 qt).
Recommended Oil Grade: SAE 15W-40 (API CK-4 or CJ-4) for most
conditions.
Recommended Oil Grade: SAE 10W-30 for cold climates below -15°C (5°F).
Coolant Capacity (engine only): 8.5 L (9.0 qt).
Oil Change Interval: 500 hours under standard duty.
Oil Change Interval: .250 hours for severe duty.
Fuel Filter Replacement: 500 hours or as indicated by restriction gauge.
Valve Clearance: Hydraulic lash adjusters; no manual adjustment.
Coolant Replacement Interval: 2000 hours or 2 years.
Crankcase Breather Service: 500 hours for cyclone separator cleaning.
Oil Pressure at Low Idle (minimum): 1.0 bar (15 psi) at operating
temperature.
Cylinder Head Bolts (M12 x 1.75), Stage 1: 60 Nm (44 lb-ft).
Cylinder Head Bolts (M12 x 1.75), Stage 2: 100 Nm (74 lb-ft) + 180°
turn.
Connecting Rod Bolts (M10), Stage 1: 30 Nm (22 lb-ft).
Connecting Rod Bolts (M10), Stage 2: 58 Nm (43 lb-ft) + 90° turn.
Main Bearing Cap Bolts (M12), Stage 1: 40 Nm (30 lb-ft).
Main Bearing Cap Bolts (M12), Stage 2: 60 Nm (44 lb-ft).
Flywheel Bolts (M12 x 1.25): 120 Nm (89 lb-ft)
Camshaft Bearing Cap Bolts: 25 Nm (18 lb-ft)
Injector Clamp Bolts: 30 Nm (22 lb-ft)
Turbocharger Mounting Nuts: 45 Nm (33 lb-ft)
Oil Pump Mounting Bolts: 28 Nm (21 lb-ft)
Water Pump Bolts: 25 Nm (18 lb-ft)
Construction: John Deere 310L and 310SL Backhoe Loaders; John Deere 50G,
60G, and 75G Excavators; John Deere 672G Motor Grader; Wacker Neuson
SW28 and SW32 Wheel Loaders.
Industrial: Multiquip DCA-125USJ Generator Sets; MEC 4069RT and 4569RT
Rough Terrain Scissor Lifts; Skyjack SJ63 and SJ85 Telescopic Boom
Lifts; Asphalt zipper AZ-480 and AZ-500 attachments.
Agriculture: John Deere 4066M Compact Utility Tractor; John Deere 5075E
and 5100E Utility Tractors; John Deere 4730 Self-Propelled Sprayer;
Krone Big M 420 Self-Propelled Mower Conditioner.
____________________________________________________________________________________
| Industrial Engines Technical Specifications |
| Car Engines Technical Specifications |
| Small Engines Technical Specifications |
| Outboard Engines Technical Specifications |
