Caterpillar solicited customer input when designing the new Cat® M318F and M320F Wheel Excavators. Heading the list of characteristics considered important were initial quality and reliability, low operating costs, operator comfort and safety, simplicity of operation and maintenance, durability, and environmental friendliness. The new models are designed around those goals, while retaining the best features of predecessor models, including the Cat Smartboom™, ride control, load-sensing hydraulics, dedicated swing pump, hydraulically driven cooling fan, large working envelope, and configuration/work-tool versatility.
Comfort and Safety
The new models include a completely new ROPS-compliant operator's cabin featuring higher pressurization, larger door with added glass, new windshield with parallel wipers, new mirrors (with a heated option), new rain visor and light protectors, a larger skylight and a standard rear-view camera housed in the redesigned counterweight, as well as a right-side camera with a separate in-cab monitor. Various other improvements have also been made to raise the comfort and safety level of the cabin.
The standard lighting package for the new models now includes a counterweight light (enhancing the rearview camera function at night), three cabin-mounted lights, and light on the boom. Standard LED lights replace the previous halogen lighting.
Easy to operate, maintain and service
An automatic system, when enabled by the operator, senses machine parameters and locks the axle-oscillation function and sets the service brakes, readying the machine to dig. This feature reduces operator fatigue by removing the need to constantly press the brake pedal and results in added productivity. A new travel-lock system, engaged via the switch panel, combines implement-stop and swing-lock functions. Cruise control is a standard feature. The M318F and M320F also incorporate a PIN-code anti-theft system.
A new blade for the M318F and M320F has a redesigned profile, allowing the blade to remain parallel to the ground at any height and assisting material to roll more easily in front of the blade.
The engine is longitudinally mounted with the cooling package forward of the engine, resulting in easy, ground-level access to routine maintenance points. An electric fuel-priming pump eliminates filling filters before installation. All the radiators are now grouped in the same compartment and the condenser can be tilted with no tool for ease of cleaning. Electrical and hydraulic components are now grouped in specific areas for ease of service and an automatic centralised greasing device (Auto-lube) is standard allowing operators to remain focused on the job.
Fuel Efficiency and Sustainability
The Cat C7.1 ACERT™ engine is rated at 169 horsepower (126 kW), meets USA EPA Tier 4 Final/EU Stage IV emission standards and features refinements that yield added torque and faster response to changes in load.
The C7.1 ACERT engine integrates an emissions after-treatment system, which requires no attention other than periodically replenishing the diesel-exhaust-fluid (DEF) tank. Emissions technology includes the Cat NOx-reduction system, selective catalytic reduction, diesel oxidation catalyst, diesel particulate filter (DPF), and high-pressure/common-rail fuel system. The DPF passively regenerates (burns away collected soot), requiring no intervention by the operator and causing no interruption in the work cycle.
The optional Cat Bio HYDO™ Advanced hydraulic oil and bio-diesel (up to 20% mixed with Ultra Low Sulfur Diesel Fuel) can be used without reducing the life of the systems.
Eco Modes have been refined and reduce the engine speed with no reduction of power providing reduced fuel consumption with no compromise in performance.
A new electronic control hydraulic system combined with new medium-pressure and fan pumps enhances hydraulic response and reduce overall load on the engine for greater fuel efficiency.
The design of the engine and the after-treatment system results in low fluid consumption for new models, conserving both fuel and DEF to lower operating costs. Depending on the application, fuel consumption for the new models can be as much as 10% lower than that of predecessor models.
Adapted from press release by Katherine Guenioui
Read the article online at: https://www.worldcement.com/product-news/19092014/new-design-for-cat-m318f-and-m320f-wheel-excavators-522/