Case D Series Excavators Feature Hydraulic Upgrades

April 23, 2015

The introductory lineup of D Series excavators includes the CX210D, CX250D, CX300D, and CX350D, as well as a long-reach CX250D LR.

Hydraulic system upgrades enable the units to attain cycle times up to 12 percent faster, according to Case. An electronically controlled pump, a larger control valve, and multiple sensors combine with the company’s Intelligent Hydraulic System and its four integrated control systems. Those four systems are: Boom Economy Control (BEC), which reduces rpm by using gravity during boom down and swing; Auto Economy Control (AEC), which lowers rpm during idle and automatically shuts down the engine after a preset idle time; Swing Relief Control (SWC), which reduces hydraulic power at the swing start; and Spool Stroke Control (SSC), which adjusts hydraulic pressure during digs. SSC also re-uses hydraulic fluid whenever possible to automatically improve cycle times and efficiency, Case says.

D Series excavators are Tier 4 Final and provide up to 14 percent greater fuel efficiency, the company says. The excavators combine CEGR, SCR and a DOC, and do not require a DPF.

The arm and boom are stronger than the C Series, giving the excavators as much as a 6 percent bump in breakout force, Case says. The undercarriage is built with thicker steel, and a single-slope design reduces dirt accumulation and eases cleaning.

Grease zerks have been banked together to enable simpler service access, and the excavators have hand rails and guard rails that meet ISO certification for safe access during servicing of the machine. (Brand marketing manager Philippe Bisson does a walk-around in the video below.)

The cab on the D Series is larger than the predecessor, and it is pressurized and iso-mounted to reduce noise and vibration. A fully adjustable operator station includes a standard heated air-ride seat and joystick controls that allow for smooth performance. Visibility is improved with large windows and up to three cameras that provide 270-degree viewing. The standard rearview camera feeds a 7-inch widescreen monitor, which can split into a three-way view incorporating two side-view cameras when those options are selected.

Cameras are included in the two optional LED light packages, which include six lights (two front, two rear, and one on each side) plus a side-view camera. The premium light package includes the upgraded Maximum View monitor that combines feeds from the three cameras.

Other standard features added to the D Series include Free Swing for improved craning, laying or lifting of offset loads; oil sample ports for quick sampling of engine and hydraulic oils; and an easy pattern selector for the operator’s preference of ISO or SAE controls.

The D Series excavators are covered under Case ProCare, which includes a three-year SiteWatch telematics subscription, a three-year/3,000-hour full-machine factory warranty, and a three-year/3,000-hour planned maintenance contract.

Case D Series Excavator Specifications

(full spec sheets and brochure can be downloaded below)


  • Operating weight: 48,973 pounds
  • Engine: Isuzu AR-4HK1X
  • Power, net: 160 horsepower @ 1,800 rpm
  • Max dig depth: 21 feet 10 inches
  • Dump height: 22 feet 4 inches
  • Bucket digging force: 31,923 lb.-ft.


  • Operating weight: 56,909 pounds
  • Engine: Isuzu AR-4HK1X
  • Power, net: 177 horsepower @ 2,000 rpm
  • Max dig depth: 24 feet 4 inches
  • Dump height: 23 feet 2 inches
  • Bucket digging force: 36,149 lb.-ft.


  • Operating weight: 67,271 pounds
  • Engine: Isuzu AQ-6HK1X
  • Power, net: 207 horsepower @ 1,800 rpm
  • Max dig depth: 24 feet 10 inches
  • Dump height: 24 feet 3 inches
  • Bucket digging force: 39,342 lb.-ft.


  • Operating weight: 82,483 pounds
  • Engine: Isuzu AQ-6HK1X
  • Power, net: 268 horsepower @ 1,900 rpm
  • Max dig depth: 26 feet 8 inches
  • Dump height: 24 feet 8 inches
  • Bucket digging force: 51,639 lb.-ft.

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