The John Deere 490E is an excavator, or digger -- a large industrial vehicle used by workers to remove earth and rock. Common excavator applications include digging foundations, preparing ground for laying roads and digging mines. More specifically, the John Deere 490E is a hydraulic excavator, meaning it uses cylinders containing pressurized fluids to power its arm and bucket.
The John Deere 490E has a width of 8.8 feet, a measurement from the outside of one of the excavator’s army tank-style wheel tracks to the outside of its other track. It has a length of 9.4 feet from the front of the tracks to the back of the tracks and a height of 8.8 feet, as measured from the ground to the top of the cab. The bottom of the 490E -- excluding its wheel tracks -- has a ground clearance of 1.4 feet.
An excavator’s bucket is the large scoop at the end of its extension arm. The John Deere 490E excavator has a bucket with a capacity of 1.6 cubic yards, or 43.2 cubic feet. The greater an excavator’s bucket capacity, the greater the amount of materials it can scoop in a single pass.
The loading height of an excavator is the maximum height its arm can extend with its bucket positioned concavely, for scooping or loading. The John Deere 490E has a loading height of 20.1 feet.
In contrast to loading height, the cutting height of an excavator is the maximum height its arm can extend with its bucket positioned convexly, for cutting or performing other non-scooping functions. The John Deere 490E has a cutting height of 27.9 feet.
The John Deere 490E has a reach of 26.7 feet. An excavator’s reach measures how far its arm can extend out horizontally with its bucket resting on the ground.
"Digging depth" can refer to two different excavator specifications: maximum digging depth (how far down an excavator can dig while digging straight down) and maximum vertical wall digging depth (how far down an excavator can dig while keeping its bucket flush up against a wall or other structure that sits perpendicular to the ground). The John Deere 490E has a maximum digging depth of 18.3 feet and a maximum vertical wall digging depth of 16.3 feet.
At the core of the John Deere 490E is a four-cylinder, turbocharged model 4045T engine. The engine has a maximum power output of 90 horsepower, an engine displacement of 276 cubic inches and a maximum torque of 252 foot-lbs.
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