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Case 921E Boasts Productivity, Maintenance Improvements

Thu April 05, 2007 - National Edition
Construction Equipment Guide

Case Construction Equipment has upgraded the 921E wheel loader to join its E Series line, with an electronically controlled engine that provides increased efficiency, a new cab that offers greater operator comfort and visibility, and easier maintenance.

The new Case wheel loader also delivers a larger payload of 5.75 cu. yds. (4.4 cu m).

“The operator environment on 921E has been designed with ergonomics and operator comfort in mind and includes plenty of user-friendly controls, creature comforts and productivity features,” said Dave Wolf, brand marketing manager of Case Construction Equipment. “At Case, we know from experience that a comfortable operator is more alert, responsive and productive.”

The 921E has easy access to fluid-level sight gauges, centralized grease fittings and all checks are made from ground level. A one-piece electric lift hood replaces six access panels and gives operators and technicians easy access to the entire engine area.

Case Tier III Adjustable Power

The Case 921E wheel loader is powered by a fully electronic Tier III-certified engine that incorporates the new common-rail fuel-injection system, which allows air and fuel to mix in nearly equal proportions for a cleaner burn.

On this new wheel loader, operators can match power and fuel economy to their application. They can choose between three power curves — max, standard and economy power — and four work modes — max, standard, economy and auto.

For high-production activities such as aggregates operations that require high breakout force and fast cycling, the operator may choose to use maximum power at all times.

For operations that involve hauling of lighter materials, economy mode will complete the task with the greatest fuel efficiency.

In auto mode, the electronically controlled engine adjusts between power curves to move the maximum amount of material per pound of fuel.

At max performance, the six-cylinder engine on the 921E boasts 297 net hp (221 kW). The 921E offers multiple idle settings to reduce fuel consumption. When the machine is idling, it will automatically reduce the engine RPMs from 900 to 600.

Quiet, Comfortable Cab

The new cab allows for maximum adjustments to increase the operator’s comfort and productivity.

“We can match the cab environment to the operator’s size and preferences, with a tilt steering column, infinitely adjustable seat, arm rests and control placement,” Wolf said. “Operators will also appreciate the increased roominess and better visibility from the cab.”

The 921E shares the same recently redesigned cab as the 721E and 821E. Isolation mounted, the spacious cab is among the quietest in the industry. Numerous strategically located air diffusers throughout the cab provide maximum air circulation for faster, more thorough heating and cooling.

Operators familiar with the 721E and 821E will find that the 921E offers the same interface so it’s easy to switch from one machine to the other. The 921E offers the same ergonomic layout, combined with large switches and simplified displays that use analog gauges.

Floor-to-ceiling glass in the front, along with a sloping rear engine compartment, gives the operator a panoramic view, with maximum visibility both forward and to the rear.

“The operator has a clear, direct view to the front tires and to the bucket edge,” Wolf said. “The increased visibility to the attachment and work site makes for more productive and efficient operation.”

The standard single-lever joystick loader control with forward-neutral-reverse quick shuttle switch and transmission downshift button puts all the controls at the operator’s fingertips. A digital display records real-time data, shows diagnostic information and allows programming of operational modes.

An in-cab cooler box keeps food and drinks cool during a long, hard day on the job, and a lockable storage compartment keeps the operator’s personal items secure. The cab door and right-hand windows swing back 180 degrees for maximum cross ventilation, or the right-hand cab window can be opened slightly to temper the cab.

Maintenance, Serviceability

Easy servicing increases machine usage and lowers ownership costs.

“The easier it is to perform daily maintenance and service, the more likely it’s going to get done,” said Dave Wolf, Case brand marketing manager. “That’s why we designed the Case 921E wheel loader with best-in-class maintainability, including ground-line service checks.

“Just as on our other Case E Series wheel loaders, the only tool required for service checks is a rag to wipe oil off the dipstick,” Wolf said.

The electrically actuated rear hood provides easy access to the engine and all daily maintenance checkpoints.

The 921E features a new cooling package with improved access for cleaning. It has a swing-out condenser for easier maintenance and cleaning.

More Material Retention

Case has redesigned the bucket on the 921E for higher productivity and increased life, extending the bolt-on cutting edge to accommodate larger loads and creating a fine edge for easier penetration into the pile. The skid plates on the 921E are bolted on for easier repair and replacement. The bottom floor plate on the bucket is set at a 5-degree angle, and the hinge pins are raised up out of the dirt and debris for longer life and improved mixing and filling of material.

Ride Control, an option on the 921E wheel loader, provides increased material retention while reducing shocks on the machine and reducing operator fatigue. Ride Control can be set for full-time mode or auto mode, which kicks in when roading above 3 mph (4.8 kmh).

The Case 921E also features limited-slip axles on the front and rear, to automatically transfer power from the wheel that’s slipping to the wheel that’s gripping.

“These machines have all the traction needed to continue to work efficiently, regardless of conditions,” Wolf said.

Outboard planetary and wet-disc brakes provide ease of serviceability and machine stability because the weight is outside the frame rather than inside.

The 921E features a redesigned counterweight with a lower profile that’s less subject to damage.

Ideally suited to heavy-duty hauling applications, such as road and quarry work, the 921E has an operating weight of 50,034 lbs. (22,695 kg) and an increased bucket capacity of up to 5.75 cu. yds. (4.4 cu m).

In addition to the 921E, the Case E Series wheel loaders include the 721E, 721E/XT and 821E. Case also offers the 521D/XT and the 621D/XT/XR wheel loaders, along with a full line of compact wheel loaders.

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