RENR9980 16 Page RENR9980 May 2006 330D Excavator Hydraulic System B6H1-UP JLP1-UP HAS1-UP EDX1-UP T2Y1-UP © 2006 Caterpillar All Rights Reserved Printed in U.S.A. Hydraulic Symbols (Electrical) Electrical Symbols Table 325-AG135 PK-14 Circuit Identification Number Wire Color Wire Gauge Harness identification code This example indicates wire 135 in harness "AG". 325-PK-14 Wire Gauge Wire Color Circuit Number Identification Wire Number Identification Codes Current Standard Previous Standard Electrical Schematic Example Hydraulic Schematic Example 325-PK Wire Color Circuit Number Identification B A Wire Wire (EXAMPLE VALVE) Current Standard Transducer (Fluid) Transducer (Gas / Air) G Generator Electrical Wire Pressure Switch M Electric Motor Pressure Switch (Adjustable) Temperature Switch T Pressure Symbol Temperature Symbol Level Symbol Flow Symbol Electrical Symbols (Electrical) ONE POSITION TWO POSITION THREE POSITION VENTED PRESSURIZED RETURN ABOVE FLUID LEVEL RETURN BELOW FLUID LEVEL LINES CROSSING LINES JOINING TWO-WAY THREE-WAY FOUR-WAY SPRING CONTROL VALVES RESTRICTION LINE RESTRICTION (FIXED) 2-SECTION PUMP MAIN AUX. SPRING (ADJUSTABLE) VARIABILITY LINE RESTRICTION (VARIABLE) LINE RESTRICTION VARIABLE and PRESSURE COMPENSATED PRESSURE COMPENSATION PUMP: VARIABLE and PRESSURE COMPENSATED ENERGY TRIANGLES HYDRAULIC PNEUMATIC MEASUREMENT PRESSURE TEMPERATURE FLOW ROTATING SHAFTS UNIDIRECTIONAL BIDIRECTIONAL PUSH-PULL LEVER PEDAL GENERAL MANUAL PUSH BUTTON SPRING MANUAL CONTROL SYMBOLS HYDRAULIC MOTORS FIXED DISPLACEMENT VARIABLE DISPLACEMENT NON-COMPENSATED UNIDIRECTIONAL BIDIRECTIONAL HYDRAULIC PUMPS FLUID STORAGE RESERVOIRS CROSSING AND JOINING LINES VALVE ENVELOPES VALVE PORTS BASIC COMPONENT SYMBOLS FLUID CONDITIONER PUMP or MOTOR FLUID POWER SYMBOLS FIXED DISPLACEMENT VARIABLE DISPLACEMENT NON-COMPENSATED UNIDIRECTIONAL BIDIRECTIONAL VALVES PILOT CONTROL SYMBOLS RELEASED PRESSURE EXTERNAL RETURN INTERNAL RETURN REMOTE SUPPLY PRESSURE SIMPLIFIED COMPLETE INTERNAL SUPPLY PRESSURE ACCUMULATORS SPRING LOADED GAS CHARGED SOLENOID or MANUAL SOLENOID and PILOT SOLENOID and PILOT or MANUAL COMBINATION CONTROLS SOLENOID SERVO THERMAL DETENT HYDRAULIC AND PNEUMATIC CYLINDERS DOUBLE ACTING SINGLE ACTING BASIC SYMBOL SPRING LOADED CHECK VALVES TWO POSITION INFINITE POSITIONING FLOW IN ONE DIRECTION FLOW ALLOWED IN EITHER DIRECTION THREE POSITION CROSS FLOW PARALLEL FLOW INTERNAL PASSAGEWAYS NORMAL POSITION AB PT AB PT SHIFTED POSITION INFINITE POSITION CONTROL VALVES ATTACHMENT MANUAL SHUTOFF SHUTTLE PILOT CONTROLLED Heavy Lift and Fine Swing Description Part Number Machine Location Schematic Location ACCUMULATOR - HYDRAULIC (PILOT OIL) 164-6981 1 B-6 CYLINDER GP - BOOM 2 G-3 CYLINDER GP - BUCKET 3 G-10 G-9 CYLINDER GP - STICK 4 FILTER GP - OIL (HYDRAULIC RETURN) 188-4140 5 A-9 FILTER GP - OIL (PILOT) 158-8987 6 A-5 FILTER GP - OIL (CASE DRAIN) 126-2075 7 MANIFOLD GP - CONTROL (PILOT OIL) 215-5037 B-8 8 MOTOR GP - PISTON 234-4638 A-10 9 PUMP GP - PISTON (HYDRAULIC FAN) 259-0815 B-4 12 A-6 10 MOTOR GP - SWING 200-3373 11 G-8 MOTOR GP - TRAVEL 271-6376 13 G-5, G-7 14 PUMP GP - PISTON (MAIN) 283-6116 234-4440 15 B-3 F-6 SWIVEL GP 16 204-2819 17 F-5, F-7 VALVE GP - PILOT (TRAVEL) 270-5947 18 E-10 VALVE GP - SHUTTLE 185-0462 19 C-10 VALVE GP - CHECK (OIL COOLER BYPASS) 190-7745 20 B-10 VALVE GP - LOAD CONTROL (STICK DRIFT RED, RELIEF LINE) 255-5680 21 E-7 VALVE GP - LOAD CONTROL (BOOM DRIFT RED, RELIEF LINE) 255-5683 22 E-3 VALVE GP - MAIN CONTROL 285-1540 23 259-7732 B-6 24 VALVE GP - SWING CUSHION (FINE SWING) VALVE GP - TRAVEL COUNTERBALANCE 158-9090 F-8 26 VALVE GP - SOLENOID (HEAVY LIFT) 121-6303 B-6 25 D-2 27 VALVE GP - PILOT CONTROL (LEFT JOYSTICK) 270-5951 D-10 VALVE GP - PILOT CONTROL (RIGHT JOYSTICK) 270-5952 D-9 VALVE GP - PRESSURE REDUCING (BOOM, SWING PRIORITY) 232-4102 B-6 COMPONENT LOCATIONS MACHINE COMPONENT LOCATIONS Tap Locations Pressure, Sampling, and Sensor Tap Number Description Schematic Location AA Pilot Filter Pressure Test Port A-6 BB Drive Pump Pressure Test Port B-2 CC Power Shift Pressure Test Port A-2 SOS Hydraulic Oil Sampling Port A-5 DD Idler Pump Pressure Test Port A-2 NOTE A NOTE A NOTE A Note A: Refer to Parts Manual for your specific machine. 19 21 20 2 14 3 5 16 27 11 12 9 27 11 26 10 22 25 13 7 4 6 23 17 18 15 8 24 1 Pump Compartment (A) Delivery line (Drive Pump) (B) Delivery line (IdlerPump) (C) Drive Pump (D) Idler Pump 11 27 18 16 9 D C A B 17 7 5 6 10 26 14 MOTOR GP - PISTON (TRAVEL) FILTER GP MOTOR GP - SWING & SWIVEL VALVE GP - MAIN CONTROL PUMP GP - PISTON (MAIN) SOS AA BB CC