Cat Boosts Energy, Pace on New 304, 305 CR Compact Excavators

Finishing its household of Subsequent Technology compact hydraulic excavators, Caterpillar unveiled the reengineered 304 and 305 CR.  

Cat says each machines ship as much as a 20 % improve in efficiency with as much as 10 % decrease proudly owning and working prices in contrast with earlier fashions. 

“The expertise we’ve put in these machines provides us a base for rising and increasing the providing even additional,” says Greg Worley, Cat product professional. “We don’t finish right here. We’ll proceed to develop and develop these machines with a few of these applied sciences you see within the bigger Caterpillar world.”

Cat now presents 17 compact excavator fashions ranging from the 1.5- to 10-ton dimension class. Widespread options and a constant management format throughout the vary make coaching and operation simpler, the producer says.

Earlier than we dig into the variations, let’s check out a few of the commonalities between the 2 machines.

Efficiency Enhancements

Each new machines can journey quicker, carry extra and multifunction higher in comparison with E2 collection. This is because of a brand new engine and hydraulic system enhancements.

Assembly Tier 4 Remaining and EU Stage V emissions requirements, the Cat C1.7 Turbo engine delivers extra energy than the earlier C2.4 engine. Gasoline utilization is lowered via customary auto-idle, auto-engine shutdown and environment friendly load-sensing hydraulics with a variable displacement pump.

Excessive main-relief pressures, paired with movement charges, generate the hydraulic capability for prime digging and lifting forces and extra environment friendly use of a spread of attachments. Full with quick-disconnect strains, the usual auxiliary system gives the selection of one-way, two-way or steady movement.

Contained in the Cab

If the cab appears acquainted, that’s as a result of it’s the identical one on different Subsequent Gen fashions.

“Contained in the cab, seat ahead – the screens, the console, the controls, the sample changer – all the pieces is frequent via the vary of our machines from the 1.5- to the 10-ton,” says Worley. “Operators aren’t available like they was once. Commonality is nice as you’re transferring from one machine to a different.”

The sealed and pressurized cab enclosure is out there with heating and/or air-con. A cover possibility is out there in some areas.

The Subsequent Technology LCD monitor options a big show. An superior possibility presents an intuitive touchscreen and digicam monitoring.

As with different Subsequent Gen fashions, the 304 and 305 CR function cruise management and stick steer to assist cut back operator fatigue, improve productiveness and transfer across the jobsite extra simply. With the push of a button, operators can activate stick steer and swap from standard lever/foot-pedal steering controls to joystick operation.

Angle blade uptake has doubled on compact excavators with the addition of stick steer, Worley says. “You possibly can put the blade in your proper hand and use it similar to a small dozer or track-type tractor. Folks can now do higher grading and ending with this angle blade.” The angle blade strikes 45 levels left or proper of heart.

Every day upkeep checks for the 304 and 305 CR are rapidly made out of floor stage via aspect doorways.Gear WorldService and Upkeep

The 304 and 305 CR provide as much as 10 % decrease whole value of possession versus earlier fashions due to decrease upkeep and restore prices. These value financial savings are achieved via:

Prolonged service intervalsParts commonality throughout modelsFlat, easy-to-fix panelsGround-level service accessCost-effective upkeep components

Whereas cab models function an upward exhaust, main design adjustments had been made to reroute the exhaust on the cover models. This alteration was made as extra info has change into obtainable on Tier 4 Remaining engines. “On the cover machines, we carry the exhaust again via the counterweight,” Worley says. “If you’re in landscaping and dealing across the machine you don’t need that sound and exhaust close to the operator, so we’ve taken it down away from them.”

304 now lowered radius – not compact radius

Don’t evaluate the brand new 304 to the E2 collection, Cat says; it’s a utterly redesigned mannequin. Cat moved away from the compact-radius design to improve stability and stability on the 4-ton machine.

The tracks return to 67 inches broad, 10 inches slimmer than the 304 E2, a dimension that simply matches in tight areas and on trailers. Monitor choices embrace a rubber belt or metal observe.

Operators will discover higher digging and trenching, as nicely as the power to hold heavy hundreds with out tipping ahead. “It makes it a higher machine by making it a lowered radius,” says Worley. “With out altering any hydraulics, your backfill is tremendously improved.”

With no further counterweight, the 304 has a 14-inch overhang. With the non-compulsory 496-pound counterweight, the overhang is 18 inches.

The machine maintains 40 mm pins, so operators can use the identical attachments and couplers as earlier fashions.

305 CR “a real 5-ton machine”

An improve to the 305 E2, the 305 CR delivers almost 9 % extra energy with 11,061 kilos of bucket breakout power, 6,362 kilos of ordinary stick digging power and 5,665 kilos of lengthy stick digging power. It additionally presents 5.6 inches deeper dig depths than the 305 E2, giving it extra software flexibility.

The 305 CR presents 78-inch tracks for added stability and comes in three choices: a rubber belt, metal observe or metal observe with rubber pads. “The metal observe with rubber pads provides you the most effective of each worlds,” says Worley. “You can soar the curbs and have the power and sturdiness of a metal observe. It additionally provides a number of low-down weight to this machine, so that you don’t really need the additional counterweight with any such configuration since you’ve received some naturally built-in weight.”

So, when ought to the additional counterweight possibility be used? Think about including it in case you’re utilizing a heavy attachment configuration, like a tiltrotate system. The TRS6 is appropriate with the 305 CR. The machine maintains 45 mm pins for compatibility with earlier attachments.

Sneak peek: Extra expertise, attachments coming

Cat additionally previewed a few of the applied sciences from bigger machines that might be trickling right down to the smaller fashions.

By the top of the yr, excavators from the 3.5- to 10-ton vary might be Cat Grade succesful. Whereas the grade management expertise is not going to be manufacturing unit put in, it will likely be obtainable as an aftermarket equipment via Cat/Sitech dealerships.

Grade with superior 2D contains hardware, sensors and a devoted monitor for grade plan creation, enhancing and viewing. Grade with 3D contains GNSS receivers and antennas. A website radio is required for each 2D and 3D. Increase swing is not going to be supported by the system.

Tiltrotate techniques will even be obtainable for 3.5- to 4-ton machines within the first quarter of 2022. The brand new TRS4 might be Cat Grade supported for tilt, however not rotation.  

Fast Specs

Mannequin304305 CREngineCat® C1.7 TurboCat® C1.7 TurboNet energy45 hp45 hpGross energy48.4 hp48.4 hpMin. weight with cab8,875 lb11,234 lbMax. weight with cab9,867 lb12,688 lbTail swing radiusReducedCompactDig depth customary126.4 in 134.6Dig depth lengthy138.2 in144.5 in

*Internet energy marketed is the facility obtainable on the flywheel when the engine is supplied with fan at minimal pace, air consumption system, exhaust system, and alternator.