Inside_SENR3290

SENR3290 April 1986 FLUID POWER SYMBOLS D11N Tractor Hydraulic System 74Z1-UP © 1986 Caterpillar All Rights Reserved Printed in U.S.A. SENR3290 16 Page, (Dimensions: 34 inches x 24 inches) BASIC COMPONENT SYMBOLS MAIN AUX. PUMP:

VARIABLE and PUMP or MOTOR FLUID CONDITIONER SPRING CONTROL VALVES RESTRICTION LINE RESTRICTION 2-SECTION PUMP PRESSURE COMPENSATED (FIXED) VARIABILITY SPRING LINE RESTRICTION PRESSURE HYDRAULIC PNEUMATIC LINE RESTRICTION ATTACHMENT (ADJUSTABLE) (VARIABLE) COMPENSATION ENERGY TRIANGLES VARIABLE and PRESSURE COMPENSATED VALVES VALVE ENVELOPES VALVE PORTS ONE POSITION TWO POSITION THREE POSITION TWO-WAY THREE-WAY FOUR-WAY CONTROL VALVES A B A B P T P T NORMAL POSITION SHIFTED POSITION INFINITE POSITION CHECK VALVES BASIC SPRING SHUTTLE PILOT SYMBOL LOADED CONTROLLED FLUID STORAGE RESERVOIRS VENTED PRESSURIZED RETURN ABOVE FLUID LEVEL RETURN BELOW FLUID LEVEL MEASUREMENT PRESSURE TEMPERATURE FLOW ROTATING SHAFTS UNIDIRECTIONAL BIDIRECTIONAL COMBINATION CONTROLS SOLENOID SOLENOID SOLENOID SOLENOID and SERVO THERMAL DETENT or MANUAL and PILOT PILOT or MANUAL MANUAL CONTROL SYMBOLS PUSH-PULL LEVER MANUAL SHUTOFF GENERAL MANUAL PUSH BUTTON PEDAL SPRING PILOT CONTROL SYMBOLS RELEASED PRESSURE REMOTE SUPPLY PRESSURE EXTERNAL RETURN INTERNAL RETURN SIMPLIFIED COMPLETE INTERNAL SUPPLY PRESSURE ACCUMULATORS SPRING LOADED GAS CHARGED CROSSING AND JOINING LINES LINES CROSSING LINES JOINING HYDRAULIC AND PNEUMATIC CYLINDERS SINGLE ACTING DOUBLE ACTING HYDRAULIC PUMPS FIXED VARIABLE DISPLACEMENT DISPLACEMENT NON-COMPENSATED UNIDIRECTIONAL BIDIRECTIONAL HYDRAULIC MOTORS FIXED VARIABLE DISPLACEMENT DISPLACEMENT NON-COMPENSATED UNIDIRECTIONAL BIDIRECTIONAL INTERNAL PASSAGEWAYS INFINITE THREE TWO POSITIONING POSITION POSITION FLOW IN ONE PARALLEL CROSS FLOW ALLOWED IN DIRECTION FLOW FLOW EITHER DIRECTION

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