JD 755D Crawler Dozer Sports Increased Power, Visibility

Tue May 08, 2007 - National Edition
Construction Equipment Guide

John Deere’s new 755D crawler loader features increased horsepower, tipping load, visibility and serviceability.

“This loader has incredible performance, but it’s also easy to operate and fast to service. It’s ideal for loader applications that require a lot of power for faster loading and transport,” said Dan Drescher, product marketing manager, John Deere Construction & Forestry Company.

A Tier III-certified, turbocharged, charge-air-cooled, 6.8 L, six-cylinder John Deere 6068H engine features a wet sleeve design and produces 181 hp (135 kW) at 1,800 rpm. The hydrostatic transmission is controlled by a single lever and enables the 755D to provide power management, infinite speed control, power turns, counter-rotation and braking.

A transmission-only decelerator operation provides full power to the hydraulics while slowing the tracks. The 755D loader provides new, adjustable transmission rates — the technician quickly adjusts the rate by using a laptop. Drawbar pull is increased by 18 percent.

The cool-on-demand cooling system also was updated. Five fin per inch radiator resists plugging and cleans easily, while the hydraulically driven fan reduces wear and adjustment of the drive belts.

The operator’s station features numerous improvements that enhance comfort and productivity, according to the manufacturer.

Large access doors — 4 in. (10 cm) wider than the previous model — provide easy entry and exit. Operator comfort is further enhanced by increased airflow and defrosting from 10 adjustable vents and dual-sided sliding windows.

A redesigned, front-mounted monitor features audible and visual warning lights, illuminated gauges and a high-visibility screen. Visibility to the bucket is the best in the industry. Activation of the return to dig, boom float and boom height kickout functions are effortless, according to the manufacturer.

The hydraulic system provides increased productivity, with load-sensing hydraulics that deliver predictable response, regardless of the load. A single hydraulic pilot control levers results in less operator fatigue and better control. An optional ripper pins directly to the frame for enhanced durability.

With 101 in. (257 cm) of track on the ground, this machine has increased maneuverability. A 100-in. (254 cm), 3.14-cu.-yd. (2.4 cu m) bucket is standard, with a 2.62-cu.-yd. (2 cu m) bucket optional.

New, unitized track frames have outside-mounted final drives. The NeverGrease bucket pivot pins never need lubing and weight distribution has been redesigned, with a standard 2,090-lb. (948 kg) counterweight for increased tipping load.

Servicing the 755D is quick and simple. Daily and periodic service points are grouped, and lockable service doors provide wide-open access to dipsticks, sight gauges, fill tubes and filters.

The cab tilts rearward with the removal of four bolts, and service intervals are generous, with 500 hours for engine oil and hydraulic/transmission filter changes, 1,000 hours for final drive and duo cone oil, and 2,000 hours for transmission oil.

Double final drive seals provide an early warning system in case of oil loss. Remote ports test system pressures, and onboard diagnostics allow quick diagnosis and rapid repair.

For more information, visit www.johndeere.com.

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