John Deere

John Deere 9RX 640

The John Deere 9RX 640 is an articulated crawler tractor in the 9R Series produced from 2021 onward. It features a powerful 13.6L 6-cylinder turbocharged aftercooled diesel engine delivering a gross rated power of 631.6 hp and a maximum of 681.2 hp. The tractor is equipped with an 18-speed full power shift transmission (e18) and articulated crawler drive with bull gear final drives. It has advanced hydraulics with closed center pressure/flow compensated system, multiple valve options, and high pump flow rates. The tractor hitch is a category IVN/IV with a rear lift capacity up to 20,000 lbs. Dimensions include a 162.5 inch wheelbase, 346.3 inch length, and a shipping weight of 56,320 lbs. Electrical system features a 250 amp alternator with optional 330 amp, three 12-volt batteries, and negative ground. The 9RX 640 is built in Waterloo, Iowa, USA, and had an original price of $896,199 in 2023.

Power631 hp

Founded2021 -

Model9RX 640

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Technical Specifications

Detailed specifications and technical data for John Deere 9RX 640

Power

Engine (max)	681.2 hp (508.0 kW)
PTO (claimed)	335 hp (249.8 kW)
Engine (gross)	631.6 hp (471.0 kW)

Engine

Note	During the first year of production the 9R 640 used a Cummins QSX15 engine.
Type	turbocharged aftercooled diesel
Model	John Deere JD14
Torque	2179 lb-ft (2954.7 Nm)
Cooling	liquid-cooled inline
Starter	electric
Cylinders	6-cylinder 24-valve
Emissions	Tier IV
Rated RPM	2100
Torque RPM	1550
Air cleaner	dry
Bore/Stroke	5.20x6.50 inches (132 x 165 mm)
Compression	15.9:1
Fuel system	electronic high-pressure common rail
Displacement	826.9 ci (13.6 L)
Oil capacity	67.6 qts (64.0 L)
Starter volts	12
Coolant capacity	59.7 qts (56.5 L)
Oil change interval	500 h
Rated Power (gross)	631.6 hp (471.0 kW)
Maximum Power (gross)	681.2 hp (508.0 kW)

Tracks

Width	30 inches (76 cm), 36 inches (91 cm)

Variants

9R 640	wheeled 4WD
9RX 640	articulated crawler

Dimensions

Gauge	87/120 inches (220/304 cm)
Length	346.3 inches (879 cm)
Wheelbase	162.5 inches (412 cm)
Height (cab)	146.3 inches (371 cm)
Shipping weight	56320 lbs (25546 kg)
Height (exhaust)	145.1 inches (368 cm)

Electrical

Ground	negative
Batteries	3
Battery volts	12
Charging amps	250
Charging system	alternator
Optional charging amps	330

Hydraulics

Type	closed center pressure/flow compensated
Valves	4 to 8
Pressure	2900 psi (200.0 bar)
SCV flow	35 gpm (132.5 lpm)
Pump flow	55 gpm (208.2 lpm)
Optional SCV flow	42 gpm (159.0 lpm) (Optional, 3/4 inch coupler)
Optional pump flow	110 gpm (416.4 lpm)

Mechanical

Cab	standard with air-conditioning
Drive	articulated-crawler
Brakes	Hydraulic wet disc brakes
Final drives	bull gear
Differential lock	electro-hydraulic front and rear
Articulated power steering	yes

Production