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| Caterpillar's PM620 And PM622 Cold Planers  Caterpillar Inc. announced the availability of the PM620 and PM622 Cold Planers. The machines are high-production, highly maneuverable half-lane milling machine that perform controlled full-depth removal of asphalt and concrete pavements in a single pass. Operating weight for the PM620 is approximately 33 330 kg (73,260 lb) and the PM622 is approximately 33 900 kg (74,580 lbs). Transport weight for the PM620 is approximately 29 400 kg (64,680 lb), and the PM620 is approximately 30 000 kg (66,140 lb). Engine The PM620 and PM622 are powered by a Cat C18 ACERT engine, a turbocharged, 6-cylinder diesel engine that provides 470 kW (630 hp) of gross power. The C18 engine meets regional emission requirements. In regions that require it, the engines meet U.S. EPA Tier 4 Final / EU Stage IV emission standards. For all other regions, the engine meets Tier 3 / Stage IIIA equivalent and China Nonroad Stage III emission standards. The engine is iso-mounted to reduce vibration and increase operator comfort. ... Undercarriage and Drive System The PM620 and PM622 utilize a four-post design. The leg posts feature an auto-leveling function that provides smooth height adjustment without stepping. The machines are fully hydrostatically driven by two variable displacement propel pumps supplying oil to variable displacement motors on each track. Drive motors are piston-type and automatically control displacement to provide maximum torque for work or greater speed for moving around the job site. A propel lever/steering joystick provides infinite control of the travel speed within the range. The machines have a robust propel system with a diagonal cross flow design that provides exceptional traction. The pumps drive opposing track motors, front to back and side to side, to ensure the machine has power across the center of gravity of the machine. In extreme conditions, automatic traction control minimizes slippage by providing more power to tracks that grip. ... Operator's Environment The operator's station features dual operating controls, including joystick steering/propel lever, upper conveyor controls and rear track steering controls. Ergonomic instrumentation layout has been designed for comfort and ease of use. A touchscreen display is visible in day or night conditions, and keypads are backlit for comfortable low light operation. Keypad controls are positioned within easy reach for the operator. A large storage locker is standard. Options that add comfort for the operator include suspension seats and a hydraulically operated canopy. The canopy can quickly deploy and retract to a storage position without disrupting operation. The canopy can be equipped with optional front and rear windscreens that protect the entire width of the operator station. ... Cutting System The cutting chamber features a design that streamlines material flow, reduces wear on the chamber, and has enhanced flush cutting capability. Side plates move via independent hydraulic cylinders that are equipped with position sensors. This ensures that the side plates float at the proper level, and eliminates binding. It also eliminates the need for a wire (yo-yo) sensor by enabling the entire length of the side plate to function as an averaging ski for grade matching. A hydraulically operated anti-slab device prevents slabbing of the road surface. It also protects the collecting conveyor and ensures an optimum discharge opening to the rotor chamber. The chamber also features a right side hinged door to provide service access to the rotor. The moldboard, side plates and anti-slab device all feature raise, lower, float and hold functions. ... Cat Grade Control Option The PM620 and PM622 can be equipped with integrated Cat Grade Control. The 2D-capable/3D-ready grade and slope system automatically controls rotor depth and cross slope to a preset cutting depth, and can be enhanced for full 3D control with the addition of optional equipment. The base system is fully integrated with the machine, providing easier, more precise operation and better system protection. The system can be configured with contacting or non-contacting grade sensors including Cat sonic sensors and mounting hardware, the side plate position or optional inboard ski. The machine can be set up to control grade on both sides using any combination of sensors. Or, the machine can be set up to control grade on one side of the machine and slope on the other. The system allows you to change the sensor arrangement during operation with simple commands, as work site application requires. ... Conveyor System The collecting conveyor is driven by a high-torque hydraulic motor to ensure maximum efficiency. A large chamber discharge opening clears out the cutter box quickly to maintain high production. The seamless collector belt features 32 mm (1.25") high cleats and is 850 mm (33.5") wide to clear out the cutter box effectively and control fine particles. An optional grease tensioning system uses a grease cylinder to adjust tension and tracking on the belt rather than an adjustable screw. The cylinder makes the adjustment easier and reduces crew exposure to the spinning belt. A traditional screw adjustment design is also available. ... Optional Equipment Options include a diamond bit cutting drum and bits, a self-powered canopy, canopy windscreens, additional touchscreen displays, Cat Grade Control, inboard averaging ski with position sensing cylinder, suspension seats, remote cameras, additional water spray system, dust abatement vacuum system, a rotor turning attachment, a high-pressure wash down system, bucket trays for cutter bit bucket storage, a high capacity water tank refilling pump and an electric refueling pump. ... Serviceability Large doors open wide to provide excellent access to the engine, emissions package, air filter, hydraulic components and daily service points. The computerized monitoring system includes Electronic Control Modules (ECMs) that continually monitor system pressures and engine conditions with multiple modes of operation. The system can provide self-diagnostics and provide fault code to the touchscreen display. The machines feature long service intervals to reduce owning and operating costs. Engine oil service is every 500 hours, and hydraulic oil service is every 3,000 hours if oil sampling is not conducted, up to 6,000 hours if scheduled oil sampling occurs. ... write your comments about the article :: © 2016 Construction News :: home page |