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HydraulicsThe 12M electro-hydraulics enable advanced machine controls with precise andpredictable movements.Balanced Flow. Hydraulic flow isproportioned to ensure all implementsoperate simultaneously with little effecton the engine or implement speeds.If demand exceeds pump capacity,all cylinder velocities are reduced bythe same ratio. The result is improvedproductivity in all applications.Consistent and Predictable Movement.PPPC valves have different flow ratesfor the head (red) and rod ends (blue)of the cylinder. This ensures consistentextension and retraction speeds foreach cylinder, and gives the operatora consistent and predictable responseevery time an implement controlis moved.Advanced Electro-Hydraulic System.The 12M incorporates a state-of-the-artelectro-hydraulic system. This technologyis the foundation for revolutionarychanges of the machine and implementcontrols. Advanced joystick controlsprovide unmatched controllability withprecise, predictable hydraulic movementsand the reliability you expect fromCaterpillar.Blade Float. Blade float is built into theblade lift control valves and is optionalfor some auxiliary hydraulic functions.The blade float feature allows the bladeto move freely under its own weight.By floating both cylinders, the bladecan follow the contours of the roadwhen removing snow. Floating onlyone cylinder permits the toe of theblade to follow a hard surface whilethe operator controls the slope withthe other lift cylinder.Cat ® XT Hose. Caterpillar hosetechnology allows high pressures formaximum power and reduced downtime.Intelligent routing minimizes exposureto damage. Hose clips prevent hoserubbing and excessive vibration forlower owning and operating costs.Independent Oil Supply. Large, separatehydraulic oil supply prevents crosscontaminationand provides proper oilcooling, which reduces heat build-upand extends component life.Load Sensing Hydraulics (PPPC).The time proven load-sensing systemand the advanced Proportional PriorityPressure-Compensating (PPPC, or“triple-PC”) electro-hydraulic valveson the 12M are designed to providesuperior implement control and enhancedmachine performance in all applications.Continuous matching of hydraulic flowand pressure to power demands createsless heat and reduces power consumption.Predictable movement13