Caterpillar Hydraulic Manual (EN)

RENR9586-11 October 2016 FLUID POWER SYMBOLS 330D, 336D, 336D 2 and 340D 2 Hydraulic System Excavator and 336D MHPU 336D: 336D MHPU: 336D2: 340D2: 330D: NBD1-UP EAH1-UP FFK1-UP MEY1-UP J6D1-UP PRF1-UP WRK1-UP MPL1-UP ZML1-UP EFT1-UP JBT1-UP KKT1-UP PGW1-UP HHK1-UP WBC1-UP WDC1-UP YCF1-UP XBH1-UP LAM1-UP ELR1-UP FAR1-UP NBN1-UP TLY1-UP GGH1-UP Note A: Refer to Parts Manual for your specific machine. Note B: Available on NBD and MEY. Without Heavy Lift and Fine Swing © 2016 Caterpillar, All Rights Reserved Printed in U.S.A. HYDRAULIC SYMBOLS (ELECTRICAL) ELECTRICAL SYMBOLS TABLE G M TRANSDUCER (FLUID) ELECTRIC MOTOR TRANSDUCER (GAS / AIR) GENERATOR RENR9586-11 16 Page, (Dimensions:

34 inches x 24 inches) PRESSURE SWITCH ELECTRICAL WIRE PRESSURE SWITCH (ADJUSTABLE) TEMPERATURE SWITCH ELECTRICAL SYMBOLS (ELECTRICAL) PRESSURE SWITCH TEMPERATURE SWITCH LEVEL SWITCH FLOW SWITCH WIRE NUMBER IDENTIFICATION CODES ELECTRICAL SCHEMATIC EXAMPLE HYDRAULIC SCHEMATIC EXAMPLE CURRENT STANDARD CURRENT STANDARD HARNESS IDENTIFICATION CODE THIS EXAMPLE INDICATES WIRE 135 IN HARNESS “AG” WIRE WIRE COLOR CIRCUIT NUMBER IDENTIFICATION 325-AG135 PK-14 CIRCUIT NUMBER IDENTIFICATION WIRE COLOR WIRE GAUGE 325-PK PREVIOUS STANDARD WIRE WIRE COLOR 325-PK-14 CIRCUIT NUMBER IDENTIFICATION WIRE GAUGE (EXAMPLE VALVE) 23 19 20 21 4 17 18 8 24 103 3 6 2 15 14 9 101 102 11 26 1 16 22 11 26 5 7 10 25 13 12 MACHINE COMPONENT LOCATIONS COMPONENT LOCATIONS Description Part Number Machine Location Schematic Location Accumulator - Hydraulic (Pilot Oil) 164-6981 1 B-6 Cylinder Gp - Boom NOTE A 2 G-3 Cylinder Gp - Bucket NOTE A 3 G-10 Cylinder Gp - Stick NOTE A 4 G-9 Filter Gp - Oil (Case Drain) 126-2075 5 A-6 Filter Gp - Oil (Hydraulic Return) 188-4140 6 A-9 Filter Gp - Oil (Pilot) 158-8987 7 A-5 Manifold Gp - Control (Pilot Oil) 215-5037 8 B-8 Motor Gp - Piston 234-4638 9 A-10 Motor Gp - Swing 200-3373 10 G-8 Motor Gp - Travel 271-6376 11 G-5, G-7 Pump Gp - Piston (Hydraulic Fan) 259-0815 12 B-4 Pump Gp - Piston (Main) 283-6116 13 B-3 Swivel Gp 234-4440 14 F-6 Valve Gp - Check (Oil Cooler Bypass) 190-7745 15 B-10 Valve Gp - Load Control (Boom Drift Red, Relief Line) 255-5683 16 E-3 Valve Gp - Load Control (Stick Drift Red, Relief Line) 255-5680 17 E-7 Valve Gp - Main Control 285-1536 18 D-2 Valve Gp - Pilot Control (Left Joystick) 270-5951 19 D-10 Valve Gp - Pilot Control (Right Joystick) 270-5952 20 D-9 Valve Gp - Pilot (Travel) 270-5947 21 E-10 Valve Gp - Pressure Reducing (Boom, Swing Priority) 232-4102 22 B-6 Valve Gp - Shuttle 185-0462 259-7732 23 24 C-10 B-6 Valve Gp - Swing Cushion 158-9085 25 F-8 Valve Gp - Travel Counterbalance 204-2819 26 F-5, F-7 REVERSE FAN ATTACHMENT Motor Gp - Piston 242-6776 101 E-2 Valve Gp - Control (Reverse Fan) 234-4624 102 D-2 Valve Gp - Solenoid (Reversing Fan) 242-6880 103 E-1 BASIC COMPONENT SYMBOLS MAIN AUX PUMP OR MOTOR FLUID CONDITIONER SPRING CONTROL VALVES RESTRICTION LINE RESTRICTION PUMP PUMP (FIXED) (2 - SECTION) (VARIABLE & PRESSURE COMPENSATED) VARIABILITY SPRING LINE RESTRICTION PRESSURE HYDRAULIC PNEUMATIC LINE RESTRICTION ATTACHMENT (ADJUSTABLE) (VARIABLE) COMPENSATION ENERGY TRIANGLES (VARIABLE & PRESSURE COMPENSATED) VALVE ENVELOPES VALVES 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 & SERVO THERMAL DETENT OR MANUAL & PILOT PILOT OR MANUAL MANUAL CONTROL SYMBOLS PUSH - PULL LEVER MANUAL SHUTOFF GENERAL MANUAL PUSH BUTTON PEDAL SPRING RELEASED PRESSURE PILOT CONTROL SYMBOLS REMOTE SUPPLY PRESSURE EXTERNAL RETURN INTERNAL RETURN SIMPLIFIED COMPLETE INTERNAL SUPPLY PRESSURE ACCUMULATORS SPRING LOADED GAS CHARGED CROSSING & JOINING LINES LINES CROSSING LINES JOINING HYDRAULIC & PNEUMATIC CYLINDERS HYDRAULIC PUMPS FIXED VARIABLE DISPLACEMENT DISPLACEMENT NON-COMPENSATED UNIDIRECTIONAL BIDIRECTIONAL HYDRAULIC MOTORS FIXED VARIABLE DISPLACEMENT DISPLACEMENT NON-COMPENSATED UNIDIRECTIONAL BIDIRECTIONAL INTERNAL PASSAGEWAYS INFINITE POSITIONING 3 POSITION 2 POSITION FLOW IN ONE PARALLEL CROSS FLOW IN DIRECTION FLOW FLOW EITHER DIRECTION 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 B-2 DD Idler Pump Pressure Test Port A-2 SOS Hydraulic Oil Sampling Port A-5 BB A B SOS AA C 9 D CC Pump Compartment (A) Delivery line (Drive Pump) (B) Delivery line (IdlerPump) (C) Drive Pump (D) Idler Pump PUMP GP - PISTON (MAIN) 18 16 17 VALVE GP - MAIN CONTROL 10 14 25 MOTOR GP - SWING & SWIVEL 26 11 MOTOR GP - PISTON (TRAVEL) 5 6 7 FILTER GP B A

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1 2 3 4 5 6 7 8 9 10 SWING MOTOR TRAVEL MOTOR (LEFT) TRAVEL MOTOR (RIGHT) BUCKET CYLINDER STICK CYLINDER G R.C.V-C G AL3 BL3 AR3 BR3 STICK CONTROL & STICK CYLINDER CIRCUIT LINE PATTERNS F F VALVE GP PILOT (TRAVEL) 270-5947 TT TP TRAVEL(L) TRAVEL(R) E E T1 T5 BACK FWD BACK FWD VALVE GP SOLENOID (REVERSING FAN) 242-6880 T2 T4 T6 T3 DR1DR L3 L2 bR1 aR1 aL1 bL1 PRESSURE SWITCH PRESSURE SWITCH MOTOR GP 242-6776 A B Pi A B S S T R3 VALVE GP CONTROL (REVERSE FLOW) 234-4624 VALVE GP PILOT CONTROL (LEFT JOYSTICK) 270-5951 VALVE GP PILOT CONTROL (RIGHT JOYSTICK) 270-5952 D D P STICK JLP JLT JRP JRT *AVAILABLE ON NBD AND MEY OUT JL1 VALVE GP MAIN CONTROL 285-1536 RENR9586-11 16 Page, (Dimensions:

34 inches x 24 inches) C C VALVE GP SHUTTLE 185-0462 B1 B2 B3 B4 B5 B6 B7 B8 aR3 aR4 bR3 bR4 bL3 bL2 bL4 aL2 R.C.V-C B R.C.V-B PRESSURE SWITCH B C BB DRIVE PUMP PRESSURE TEST PORT B G A SLOW RETURN BYPASS PROPORTIONAL REDUCING VALVE R.C.V-A VALVE GP CHECK (OIL COOLER BYPASS) 190-7745 D E F CC POWER SHIFT PRESSURE TEST PORT OIL COOLER IDLER PUMP PRESSURE TEST PORT DD DR1 DR L3 L2 MANIFOLD GP CONTROL (PILOT OIL) 215-5037 FILTER GP OIL (CASE DRAIN) 126-2075 IN OUT A THIS SCHEMATIC IS FOR THE 330D, 336D, 336D2, AND 340D2 MOTOR GP PISTON 234-4638 RETURN T EXCAVATOR AND 336D MHPU HYDRAULIC SYSTEM A B A FILTER GP OIL (HYDRAULIC RETURN) 188-4140 AA PILOT FILTER SOS HYDRAULIC OIL PG PC WITHOUT HEAVY LIFT AND FINE SWING MEDIA NUMBER:

RENR9586-11 DRAIN SCHEMATIC PART NUMBER: 255-5865, CHANGE: 01, VERSION: HE Pi2 Components are shown installed on a fully operable machine with the key and engine off, transmission shifter in neutral and with parking brake set. Refer to the appropriate Service Manual for Troubleshooting, Specifications and Systems Operations. 1 10 Refer to the Parts Manual using a specific serial number prefix in SIS before ordering parts from this schematic.

LINES GROUP COLOR DESCRIPTIONS IMPLEMENT & LEFT TRAVEL PUMP OUTPUT PILOT PUMP OUTPUT IMPLEMENT & RIGHT TRAVEL PUMP OUTPUT FAN PUMP OUTPUT POWER SHIFT CONTROL CIRCUIT TRAVEL SPEED CONTROL CIRCUIT SUPPLY LINE DRAIN / RETURN LINE ATTACHMENT CONTROL CIRCUIT RIGHT TRAVEL CONTROL & RIGHT TRAVEL MOTOR CIRCUIT LEFT TRAVEL CONTROL & LEFT TRAVEL MOTOR CIRCUIT SWING CONTROL & SWING MOTOR CIRCUIT BOOM CONTROL & BOOM CYLINDER CIRCUIT BUCKET CONTROL & BUCKET CYLINDER CIRCUIT DR DR B1 DR A1 BR4 BP3 BPi BDr BP2 AR4 AR1 aR3 aR4 aR1 BR1 BR3 AR3 BR2 AR2 Pi4 aR2 Pi1 BP1 BT BOOM DRIFT REDUCTION AL4 (UP) BL3 R2 (IN) (L) (BACK) (CLOSE) (DOWN) BR4 R1 BR5 AR5 STICK(2) BOOM(2) STICK(1) (OUT) ( SWING R) MAIN RELIEF (OUT) ( FWD) (OPEN) (UP) Di2 Pi2 Pi3 bL3 Di3 DST bL2 bL1 bR2 D bR1 bR3 bR4 PL PR i1 bR5 B2 A1 P2 Pi1 P-IN PSA2 DR1 PSA1 TRAVEL SPEED (TRAVEL) NO.1               DR3 DR4 T1 TRAVEL BRAKE TRAVEL BRAKE Pressure Line Pilot / Load Sensing Pressure Drain / Return Lines Component Group Attachment Air Line CALLOUTS YY Taps (Pressure, Sampling, Sensor) by letter 1 Components by number AA Connections by letter         KET BOOM EN CLOSE DOWN UP EN CLOSE DOWN UP 4 JR2 JR3 JR1 4 A5 A6 A7 B D RIGHT PUMP I LEFT PUMP Psv a3 M2 a5   

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