Outstanding performance and durability
John Deere-designed and -manufactured diesel engines provide excellent torque, fuel efficiency, and durability.
High-pressure common-rail and engine control unit (5105M only)
The high-pressure common rail (HPCR) and engine control unit (ECU) fuel system provides variable common-rail pressure, multiple injections, and higher injection pressures, up to 1600 bar (23,000 psi). It also controls fuel injection timing and provides precise control for the start, duration, and end of injection.
The HPCR fuel system and ECU allow for multiple fuel injections. The number of fuel injections, based on speed and load, help contribute to lower combustion temperatures and lower noise levels.
The electronic engine controls of the 4.5 PowerTech E engine monitor critical engine functions providing warning and/or shutdown to prevent costly engine repairs. Snapshot diagnostic data can be retrieved using commonly available diagnostic service tools.
NOTE: The 5085M and 5095M Tier 3 models have a PowerTech M engine (mechanical fuel system).
Turbocharged, air-to-air aftercooled
Turbocharged engines supply more air to the combustion chamber since the air is pre-compressed. The increased amount of air allows a corresponding increase in fuel injection which results in greater engine performance.
Air-to-air aftercooling is the most efficient method of cooling intake air to help reduce engine emissions while maintaining low-speed torque, transient response time, and peak torque. Air-to-air aftercoolers allow engines to meet emissions regulations with better fuel economy.
Heavy-duty cylinder block
The heavy-duty cylinder block provides greater strength and rigidity, which is what allows these tractors to perform in ditches, ravines, and other less-than-ideal conditions.
Statically- and dynamically-balanced crankshaft reduces engine vibration. The operator's body absorbs less vibration allowing them to stay attentive and consistent throughout the work day.
High-ring piston design reduces the non-usable air in the combustion area of the cylinders for improved fuel efficiency and combustion so operators receive the most power from every engine stroke. Ni-resist inserts reduce ring groove wear, which would lead to less effective combustion, so operators have an engine that is proactive for performance.
Tee-pee connecting rods and keystone-shaped top rings
Tee-pee connecting rods provide increased strength and durability of both the connecting rod and the pistons, which allows operators to run in a wide array of conditions.
Keystone-shaped top rings move slightly in the groove to clean the carbon deposits, conditioning the tractor to remain ready to work. Plasma-coated for reduced drag on cylinder wall and increasing overall tractor life.
Wet-type cylinder liners
Cylinder liners dissipate heat to prevent cylinder distortion and rapid ring wear, allowing operators to see consistent performance. Certified John Deere technicians can easily restore engine to the original specifications after many hours of hard operation. This extends the years of performance. The wet-type cylinder liners are not available on the 5075M 5-cylinder engine.
Full-pressure lubrication system
Full-pressure lubrication system ultimately protects your wallet from maintenance costs. The underside of each piston and piston pin is sprayed with cooled and filtered oil, which eliminates excessive heat for longer life. The full-flow filter allows the cleanest fuel to be delivered to the engine for maximum performance and filter bypass so the tractor will never be starved for oil due to an exhausted filter.
Engine oil cooler
Engine oil cooler provides additional engine oil cooling, allowing operators to run in severe applications, reducing the likelihood that the engine will overheat.
Operate safely with the neutral start switch and electric fuel shutoff
A neutral start switch ensures operator and bystander safety, the right-hand gear shift lever must be in the park or neutral position for the engine to start.
Electric fuel shutoff allows the operator to easily turn the tractor off with the key, just like an automobile. A solenoid on the injection pump permits using a key instead of a push-pull cable to shut off the engine. The electric fuel shutoff does not allow bypass starting. If an attempt is made to bypass start the tractor, through the use of electronics, the electric fuel shutoff will not allow the engine to start.
Dry-type air cleaner
A dry-type air cleaner has a dual-element design for added engine protection against dust or debris from entering the combustion chamber, ensuring performance time opposed to shop time. Reaching the filter for service is easy, the operator simply unlatches three clips. A restriction indicator light on the dash alerts the operator when servicing is required to save potential engine repairs.
Single-element fuel filter
A single-element fuel filter partners up with the hand primer and water sediment bowl to deliver the complete package. John Deere designed specifically to meet the needs of John Deere tractors, the fuel filter provides a hand primer to prime the system for an easy fix for any operator who gets busy working and forgets to fuel up. The water separator stores water separated from the fuel to protect from the cost of replacing the fuel injection pump due to water contamination.
Automotive-style poly-V fan drive belt
The automotive-style fan drive belt drives the fan, water pump, and alternator. The belt features a self-adjusting spring tensioner, which eliminates service tasks, the need for a wrench, and extends the life of the belt because it is always in the correct adjustment.
The use of biodiesel fuel up to 20% (B20) concentration is approved. Biodiesel fuel needs to meet ASTM PS 121 or DIN 51606 specifications. A local fuel supplier can provide specifications.