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Built to deliver an improved customer experience, the new 4-tonne, Cat® 304, and 5-tonne, Cat 305 CR, Next Generation Mini Hydraulic Excavators deliver more power to the pumps, higher bucket breakout forces, and deeper standard digging depths to increase performance by up to 20% over their E2 series counterparts. Their industry-leading grease intervals and extended filter service life, combined with common components throughout the line and flat, easy-to-replace side panels, deliver up to 10% lower owner and operating costs.
The new 304 and 305 CR models are the final machines to be reengineered to the Cat next-generation mini hydraulic excavator line concept. From the 1.5- to 10-tonne class models, all 17 – 20 Cat mini hydraulic excavators in the range (depending on region) offer common features and consistent controls layout to simplify training and operator adaptation.
New 304 increases stability
Built with a new reduced radius design, the 304 features a narrow, 1700-mm (66.9-in) track width, 254 mm (10 in) slimmer than the 304 E2, for more versatility and access to confined spaces. While narrower, the new 304 design increases the performance, balance, and stability of the 4-tonne class model. Its reduced radius allows for greater stability, both 360-degree and when traveling with loads, while its extra counterweight option takes the model to an even higher level of stability.
Compact performance of the 305 CR
The new engine on the 5-tonne class Cat 305 CR Excavator delivers nearly 9% greater power to increase machine performance. Hydraulic system improvements provide higher breakout forces – 49.2 kN (11,061 lbf) bucket, 28.3 kN (6,362 lbf) standard stick, and 25.2 kN (5,665 lbf) long stick – to improve digging efficiency in hard rock applications. It also offers 140 mm (5.6 in) deeper dig depths than the 305 E2, giving it more application flexibility. Its compact radius swing reduces overhang when working to the side, while its 1980-mm (78-in) track width and new extra counterweight option help to optimize stability and lift performance in confined spaces.
Both excavator models now offer an angle dozer blade option to optimize machine flexibility in backfilling and finish grading applications. In addition to offering ample above- and below-grade travel with standard float function for easy clean-up, the angle blade moves 45 degrees left or right of center. Increasing efficiencies and reducing operator interaction with final grading, angle blade movement is controlled by the right-hand joystick, while the left joystick handles machine drive.
Tailoring machine weight to job requirements, interchangeable counterweight packages offer the balance between low ground pressure and lifting performance. Their industry-exclusive Cat Stick Steer System simplifies machine control by allowing the operator to switch from conventional lever/foot-pedal steering controls to low-effort joystick operation. Two travel speed ranges and standard cruise control facilitate moving around the job site with minimum operator interaction.
Meeting U.S. EPA Tier 4 Final and EU Stage V emission standards, the turbocharged Cat C1.7 Turbo engine delivers higher power than the previous C2.4 engine. Standard auto-idle, auto engine shutdown, and efficient load-sensing hydraulics with variable displacement pumps help to lower fuel usage at the site for more affordable operation. High main-relief pressures, coupled with flow rates, generate the hydraulic capacity for high digging and lifting forces and more efficient use of a range of attachments. Complete with quick-disconnect lines, the standard auxiliary system provides the choice of one-way, two-way, or continuous flow.
Next-generation comfort, savings
Common to most Cat next-generation mini hydraulic excavators, the sealed and pressurized cab enclosure is available with heating and/or air conditioning for all-weather climate control. The cab’s large glass areas plus skylight afford all-around visibility. The large display with an advanced touchscreen option provides intuitive machine function control and easy monitoring of critical operating parameters. A canopy option is available in some regions.
Daily maintenance checks for the 304 and 305 CR are quickly made from ground level through side doors. Expanded use of common parts throughout the line plus their damage-resistant exterior construction help to reduce parts inventory investment and lower repair costs. Increased service intervals mean these excavators spend more time on the job and less time in the shop.
Original article published on gxcontractor.com