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John Deere 13.5L PowerTech PSX 6135 - Torque

An industrial diesel engine that makes 617 horsepower and 1,962 lb-ft of torque

Apr 10, 2015
Photographers: Courtesy of Manufacturer
While John Deere is well known all over the globe for its green-and-yellow farm equipment, the company also makes high-output PowerTech diesel engines for industrial uses that range from generating power to running heavy equipment such as oilfield drills and fire pumps. One of the company’s most powerful engines is the twin-turbocharged 13.5L PowerTech PSX 6135HFC95, which makes 617 peak horsepower at 1,900 rpm and 1,962 lb-ft of torque at just 1,600 rpm. The all-iron inline-six is 5 feet long, 5 feet tall, and weighs 3,699 pounds, producing that much output while meeting modern emission requirements without the use of diesel exhaust fluid.
Induction is handled by a low-pressure fixed turbo and a high-pressure variable-geometry turbo in sequence with the intake charge running through an air-to-air intercooler. The cylinder head is a one-piece cast design that uses a heavy-duty, gray iron alloy material designed to resist the stress of heat and pressure. The four valves per cylinder are operated by a large-diameter camshaft mounted inside the head that’s made of high-carbon steel with induction-hardened lobes and journals with minimal wear points to increase life and reduce noise.
The block is also gray iron, and it has internal webbing for structural strength and noise reduction. It holds full-floating steel pistons and a dynamically-balanced crankshaft that’s constructed of heat-treated, high-carbon forged steel, with bearing caps that are machined while fastened to the block for precise crankshaft alignment. Integrated into the front geartrain is an oil pump that provides up to 48-gpm of oil flow at 2,100 rpm. It’s hooked to a large plate-style oil cooler that receives 100 percent of the coolant flow while the water pump is a gear-driven modular unit that’s independent of the fan and mounted on the passenger side of the engine along with the fuel and oil filters for ease of maintenance.
While the powerplant uses electronic unit injection instead of a common-rail fueling setup, diesel is still introduced at pressures of up to 33,000 psi. This powerful injection system, along with cooled exhaust gas recirculation, a diesel oxidation catalyst, and a large diesel particulate filter (DPF) allow the engine to meet tough emissions standards. In fact, the engine is able to meet the requirements of California Air Resources Board, EPA Interim Tier 4, and EU Stage III B without needing to use diesel exhaust fluid. When we say the DPF is large, that’s no joke – the soot filter on the John Deere 6135HFC95 is more than 3 feet in length, measures 16 inches in diameter, and weighs almost 375 pounds.
Photo 2/2   |   John Deere 135l Powertech Psx 6135
Engine: John Deere PowerTech PSX 6135HFC95
Engine layout: Inline six-cylinder
Displacement: 13.5L (824ci)
Power: 617 hp @ 1,900 rpm
Torque: 1,962 lb-ft @ 1,600 rpm
Bore x Stroke: 5.20x6.50 inches (132x165 millimeters)
Valvetrain: Single overhead camshaft and 4 valves per cylinder
Compression ratio: 15.3:1
Induction: Sequential fixed- and variable-geometry turbochargers
Injection system: Electronic unit injection at 33,000 psi
Aftercooling: Air-to-air intercooler
Oil change interval: 500 hours
Head Material: Cast gray iron alloy
Block Material: Cast gray iron
Crankshaft material: Forged steel
Camshaft material: Forged steel
Engine length: 5 feet 1 inches
Engine width: 3 feet 2 inches
Engine height: 5 feet 1 inch
Engine weight: 3,699 pounds (1,678 kilograms)
Emissions systems: Cooled exhaust gas recirculation, oxidation catalyst, and diesel particulate filter
Emissions compliance: CARB certified, EPA Interim Tier 4, and EU Stage III B


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