Caterpillar Hydraulic System Manual (EN)

FLUID POWER SYMBOLS RENR9536-01 March 2005 2 3 4 8 9 10 18 1 13 11 5 21 20 330C Excavator Hydraulic System 12 6 7 15 16 22 19 17 MSD00100-UP 14 20 2 3 4 10 8 9 18 13 11 5 21 1 Variable Gauge Undercarriage Machine Component Locations © 2005 Caterpillar All Rights Reserved Printed in U.S.A.

Electrical Symbols Table Hydraulic Symbols (Electrical) M VALVE GP TRACTION CONTROL 244-6346 MOTOR GP PISTON 9Q-5697 Transducer (Fluid) Transducer (Gas / Air) Generator Electric Motor (10) Straight travel solenoid valve (11) Right travel control valve (12) Attachment control valve (13) Bucket control valve (variable gauge undercarriage) (15) Boom 1 control valve (16) Stick II control valve (18) Straight travel control valve (21) Boom II control valve (22) Stick I control valve (24) Swing control valve (25) Left travel control valve (28) Line relief valve (boom cylinder rod end) (30) Line relief valve (stick cylinder head end) (32) Main relief valve (34) Line relief valve (bucket cylinder rod end) (45) Right body (46) Left body (31) Swing parking brake (solenoid valve) (35) Pilot oil manifold SEL VALVE RENR9536-01 16 Page, BJS Electrical Wire Pressure Switch Pressure Switch (Adjustable) Temperature Switch 1 CYLINDER GP 233-8502 Electrical Symbols (Electrical) INTERNAL VIEW 3 T Pressure Symbol Temperature Symbol Level Symbol Flow Symbol MAIN CONTROL VALVE 2 Wire Number Identification Codes (1) Return Filter (2) Pilot Filter (3) Case Drain Filter FILTERS 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 Identification Number Wire Color Wire Gauge 325-PK Previous Standard Wire Wire Color (2) Makeup port (3) Relief valve (6) Swing motor (8) Relief valve (10) Makeup line (33) Fan Pump (34) Pressure tap (35) Relief valve (fan pump) 325-PK-14 Circuit Number Identification Wire Gauge B A SWING MOTOR FAN PUMP Variable Gauge Undercarriage (EXAMPLE VALVE) COMPONENT LOCATIONS Description Part Number Machine Location Schematic Location CYLINDER GP - VAR GAUGE UNDERCARRIAGE 233-8502 1 F-1, F-2, G-1, G-2 FILTER GP - CASE DRAIN 126-2075 2 A-5 FILTER GP - HYD (PILOT) 158-8987 3 A-5 FILTER GP - RETURN 188-4140 4 A-7 MOTOR GP -PISTON 9Q-5697 5 G-5, G-6 MOTOR GP -PISTON (FAN) 191-5611 6 A-9 MOTOR GP -PISTON (SWING) 200-3373 7 G-8 PUMP GP - DOUBLE PISTON (LINK) 250-2564 8 B-3 PUMP GP - GEAR (FAN) 194-8384 9 B-3 SCREEN GP 188-4067 10 A-5 SWIVEL GP 166-3088 11 F-6 VALVE GP - CHECK 190-7745 12 A-9 VALVE GP - CUSHION CROSSOVER RELIEF 158-9085 13 F-8 VALVE GP - PILOT 158-8250 14 E-10 VALVE GP - PILOT (LEFT UNIT) 216-6750 15 C-10 VALVE GP - PILOT (RIGHT UNIT) 216-6751 16 C-9 VALVE GP - PRESSURE REDUCING 232-4102 17 B-5 VALVE GP - FAN DRIVE PUMP RELIEF 200-3312 18 B-4 VALVE GP - SEL 215-5037 19 B-8 VALVE GP - SHUTTLE 185-0462 20 C-10 VALVE GP - TRACTION CONTROL 244-6346 21 F-5, F-6 VALVE GP - MAIN CONTROL 258-0290 22 D-3 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 MEASUREMENT PRESSURE TEMPERATURE FLOW ROTATING SHAFTS UNIDIRECTIONAL BIDIRECTIONAL FLUID STORAGE RESERVOIRS VENTED PRESSURIZED RETURN ABOVE FLUID LEVEL RETURN BELOW FLUID LEVEL 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 Tap Locations Pressure, Sampling, and Sensor Tap Number Description Schematic Location M1L LEFT TRAVEL MOTOR (M1 ) PRESSURE GAUGE F-6 M1R RIGHT TRAVEL MOTOR (M1) PRESSURE GAUGE F-6 M4 FAN RELIEF VALVE PRESSURE TAP B-4 ML LEFT TRAVEL MOTOR (M) PRESSURE GAUGE F-7 MR RIGHT TRAVEL MOTOR (M) PRESSURE GAUGE F-5 PC PILOT FILTER SAMPLING TAP A-5 PG PILOT FILTER PRESSURE TAP A-5 CYLINDER GP 233-8502

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10 9 8 7 6 5 4 3 2 MOTOR GP CYLINDER GP PISTON VAR GAUGE (TRAVEL) MOTOR GP UNDERCARRIAGE 9Q-5697 TRAVEL MOTOR (LEFT) TRAVEL MOTOR (RIGHT) PISTON 233-8502 G (TRAVEL) SWING MOTOR 9Q-5697 PG MOTOR GP DB PISTON (SWING) ML M1L M1R MR C C1 C1 C 200-3373 M M M1 M1 M PRESSURE PRESSURE GAUGE PRESSURE VALVE GP GAUGE GAUGE CUSHION CROSSOVER RELIEF (ANTI-REACTION) 158-9085 DR DR1 DR1 DR F BR CYLINDER GP B A BR1 BR1 VAR GAUGE V V1 V1 V VALVE GP UNDERCARRIAGE TRACTION CONTROL 233-8502 VALVE GP 244-6346 VA TRACTION CONTROL 244-6346 UN VALVE GP PILOT 158-8250 SWIVEL 166-3088 TRAVEL(L) TRAVEL(R) E BR5 BR2 AR2 aL3 BL2 AL2 BL1 aL1 Di4 Pi4 aR1 BR1 AR1aR2 aR3 BR3 AR3 aR4 Pi1 AR4 BR4 R1 AR5 aR5 R3 T AL4 aL4 BL3 R2 AL3 aL2 AL1 R R L E F T E V E R S E V E R S E E VALVE VALVE GP MAIN PILOT (LEFT UNIT) 258-0 216-6750 STRAIGHT TRAVEL CONTROL VALVE GP VALVE D PILOT (RIGHT UNIT) 216-6751 CHECK VALVES MAIN RELIEF VARIABLE VALVE GAUGE SWING UC F F SWING R I G H T TR (A LV )EL O R W A R D ST TR RAA VI EG LHT O R W A R D TR (A RV )EL ATCH V UNA DR EI RA CB AL RE R IG AA GU EGE HR bL3 aL3 RIGHT LEFT aR3 bR3 aR4 bR4 HL bL4 Di2 Pi2 bL3 Pi3 Di3 bL2 bL1 DST PL PR bR1 bR2 bR3 bR4 Di1 bR5 C A1 A2 A3 A4 A5 A6 A7 A8 RENR9536-01 B1 B2 B3 B4 C B5 B6 B7 B8 BJS A2 B1 A1 A4 PUMP GP S4 GEAR (FAN) 194-8384 PUMP GP 2, VALVE GP B2 DOUBLE PISTON FAN DRIVE (LINK) M4 PUMP RELIEF Color P2 P1 250-2564 200-3312 B VALVE GP R3 R1 PILOT PRESSURE A3 SHUTTLE P1 P2 Pi1 Pi2 PSA1 PSA2 185-0462 NO.1 NO2.

NO.3 PAC NEGATIVE Page, VALVE GP (TRAVEL) (SWING (LOCK) VALVE GP FLOW IM SEL PARKING) PRESSURE C PO RN ET SR SO UL RE X2 P HI Y 215-5037 REDUCING IM SCREEN GP 232-4102 X3 TR SU 188-4067 PILOT DR FILTER GP PUMP ST 16 VALVE GP A B HYD (PILOT) M2 AT CHECK FILTER GP 158-8987 S A2 RP IA 190-7745 C CASE DRAIN DRIVE J2 LE 126-2075 PUMP SW G CO DR1 DR2 DR3 DR4 DR5 DR6 PIN VA D TOUT R4 I PD UL ME P CO M1 SH F E OUT IN A1 J1 A M3 T THIS SC MOTOR GP PISTON PG PC NEGATIVE FLOW CONTROL PRESSURE Part #: 190 (FAN) X1 Part #:

244 191-5611 FILTER GP R2 Components RETURN off and trans 188-4140 10 9 8 7 6 5 4 3 2 1 DERS G CYLINDER GP VAR GAUGE UNDERCARRIAGE 233-8502 F AUGE IAGE E D INE PATTERNS Pressure Line C Pilot / Load Sensing Pressure Drain / Return Lines Component Group Attachment Air Line CALLOUTS Taps (Pressure, Sampling, Sensor) by letter Components by number Connections by letter B DESCRIPTIONS PUMP OUTPUT UMP OUTPUT L PUMP OUTPUT RCUIT UIT CING PILOT CONTROL CIRCUIT RIGHT TRAVEL MOTOR CIRCUIT EFT TRAVEL MOTOR CIRCUIT OTOR CIRCUIT UIT RIAGE CONTROL & CYLINDER CIRCUIT UIT IRCUIT A R THE 330C (HYDRAULIC SCHEMATIC) (LOWER - VARIABLE GAUGE) a fully operable machine with the key and engine l.

1 CYLINDER GP VAR GAUGE UNDERCARRIAGE 233-8502 CYLINDER GP VAR GAUGE UNDERCARRIAGE 233-8502 VA EXPAND CYLIN DERS CYLINDER GP VAR GAUGE UNDERCARRIAGE 233-8502 AUGE VA RIABLE G AUGE UN DERCARR IAGE GP CONTROL 290 L INE PATTERNS 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 IM LINES GROUP COLOR PLEMENT & LEFT TRAVEL DESCRIPTIONS PUMP OUTPUT PI HY LOT PUMP OUTPUT DRAULIC OIL COOLING P UMP OUTPUT IM TR PLEMENT & RIGHT TRAVE AVEL SPEED CONTROL CI L PUMP OUTPUT RCUIT SU DR ST PPLY LINE AIN / RETURN LINE EERING CIRCUIT AT TACHMENT CONTROL CIRC UIT PA RT OF A PRESSURE REDU CING PILOT CONTROL CIRCUIT RI LE SW CO GHT TRAVEL CONTROL & FT TRAVEL CONTROL & L ING CONTROL & SWING M NTROL & CYLINDER CIRC RIGHT TRAVEL MOTOR CIRCUIT EFT TRAVEL MOTOR CIRCUIT OTOR CIRCUIT UIT VA CO SH RIABLE GAUGE UNDERCAR NTROL & CYLINDER CIRC UTTLE VALVE CONTROL C RIAGE CONTROL & CYLINDER CIRCUIT UIT IRCUIT HEMATIC IS FO -7786 HE CHG09 -6370 - CHG01 are shown installed on mission shifter in neutra C C1 BL1 aL1 Di4 Pi4 aR1 BR3 AR3 aR BR5 4 Pi1 AR4 BR4 R1 AR5 aR5 aL3 BL2 AL2 T aL4 BL3 R2 AL3 AL4 SWING HL bL4 Di2 Pi2 bL3 Pi3 Di3 AL2 BL1 T aL4 BL3 R2 AL3 AL4 HL bL4 Di2 Pi2 BR2 AR2 BR1 AR1aR2 aR3 BR3 aL1 Di4 BR1 aR5 T AL4 aL4 BL3 R2 AL3 aL2 L E F T A L1 R E V E R S E R E V E R S E STRAIGHT TRAVEL CONTROL VALVE CHECK VALVES MAIN RELIEF VALVE HR STRAIGHT TRAVEL CONTROL VALVE CHECK VALVES MAIN RELIEF VALVE SWING R I TRAVEL G H (L) T STRAIGHT TRAVEL F O R W A R D TRAVEL (R) ATCH VARIABLE GAUGE UNDERCARRIAGE HL Di2 Pi2 bL3 Pi3 Di3 bL2 bL1 DST PL PR PR bR1 bR2 bR3 bR4 Di1 B1 P2 Pi1 P i2 PSA1 NO.1 N (TRAVEL) ( P NO.1 N (TRAVEL) ( P O2.

SWING ARKING) 5 DR6 TOU T IN OUT T aR3 bR3 aR4 bR4 A2 A3 A4 A A 5 A6 A7 A8 C B X2 NEGATIVE FLOW CONTROL PRESSURE PILOT PUMP DRIVE PUMP IDLE PUMP NEGATIVE FLOW CONTROL P X2 PILOT PUMP X3 M2 A2 J2 M1 A1 J1 M3

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