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hydraulic power combines with larger digging arm and bucket cylinders to yield 17 percent

higher digging arm forces and 12 percent higher bucket forces on machines with the standard

(reach) boom and arm configuration. For units in the mass excavation configuration, digging arm

forces also are up by 17 percent and bucket forces by 5 percent. The net result is shorter cycle

times and increased bucket fill factors.

Also new in the 374D implement hydraulic circuits are electrically controlled regeneration

valves, which assure positive response from the boom and digging arm cylinders. In addition to

further reducing cycle times, the new valves yield an estimated fuel saving of more than 2

percent. Also saving fuel is the hydraulically driven, variable-speed cooling fan.

Buckets, undercarriage, serviceability

A new line of buckets for the 374D are designed for added strength and durability to

accommodate the higher digging forces of the new machine. Bucket types include general duty,

heavy duty, severe duty and extreme duty. All Cat buckets feature K Series GET (Ground

Engaging Tools). Work tools for the 374D extend the machine application into such operations

as demolition, scrap processing and quarry work.

Undercarriage improvements include redesigned track links that operate with less stress,

improved carrier rollers, longer recoil springs for extended service life and new forged idlers for

improved durability. The new idlers are positioned lower to promote added stability, and a 6-inch

(160-mm) track-gauge increase further enhances the stable work platform.

In addition, the carbody (the structure mounting the machine upper to the track assemblies) is

reinforced at the roller-frame interface, and a new bolt pattern is used at the connection point.

The boom foot, skirt and counterweight mounting area also have been strengthened for longer

service life and increased durability.

To facilitate routine maintenance, the 374D uses protected fluid drain ports and self contained

hoses, spin-on filters, an integral pre-cleaner in the air cleaner (with electronic restriction

sensing), testing ports in all pressure circuits and pressurized fluid sampling ports to assure

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reliable samples. Also, the Electronic Power Control (EPC) is now located in the air-cleaner

compartment, allowing the cab floor to be washed without risk of damage to the EPC, although

the EPC and electrical terminals are weather-proof. For the operator's convenience, fluid levels

can be checked electronically at start-up.

Operator comfort and safety

For the operator's convenience and comfort, the height of the joystick consoles is now adjustable,

and the response of the joystick control levers can be adjusted to the operator's preference

through the monitor. The control pattern changer, also accessible through the monitor, allows

operators to select preferred lever functions.

The monitor provides a full-color graphic display with comprehensive machine information

(including fuel consumption) presented in either an English or ISO format. The monitor also

displays images from the optional rearview camera.

To diminish heat and noise in the cab, the hydraulic control valve, pumps and reservoir are

positioned away from the operator station. Metal-grating catwalks, 20-inches (500-mm) wide,

are located on each side of the upper structure to provide safe access to maintenance points. The

rear window, made of tempered glass, can be removed as a secondary exit.

Standard halogen lights provide exceptional jobsite illumination but can be replaced with

optional High Intensity Discharge lights on the boom and upper cab if more illumination is

required. Lights are time delayed to allow safe exit from the machine at night. As an added

safety measure, travel, swing and implement functions are locked out when the counterweight

removal system is activated.

Basic Specifications

374D 365C

Operating weight 156,819 lb (71 132 kg) 145,000 lb (66 000 kg)

Engine power (net) 476 hp (355 kW) 404 hp (302 kW)Max. hydraulic flow 232 gal (880 L) 218 gal (800 L)

Max. dig depth 31.7 ft (9.65 m) 31.0 ft (9.64 m)

Drawbar pull 110,718 lb (493 kN) 111,056 lb (494 kN)# # #

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CAT, CATERPILLAR, their respective logos, Caterpillar Yellow and the PowerEdge trade dress, as well as corporate and product identity used herein, are

trademarks of Caterpillar and may not be used without permission.

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The 374D combines added

horsepower, stronger hydraulics

and greater operating weight to

boost overall performance,whether trenching, loading,

lifting or handling attachments

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Cat 374D operating in a quarry

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Sharon Holling Amber Santor

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