卡特988H装载机液压系统油路图

UNIDIRECTIONAL
UNIDIRECTIONAL
FLOW IN ONE DIRECTION PARALLEL FLOW CROSS FLOW FLOW ALLOWED IN EITHER DIRECTION
BIDIRECTIONAL
BIDIRECTIONAL
Implement System
52 53 54 55 56 57 58 59 60 61 62 63 64 65 66A 66B 67A 67B 67C 68A 68B 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 VALVE-GP-CONTROL VALVE GP-PRESSURE CONT VALVE GP-SHUTTLE VALVE GP-RELIEF VALVE GP-RELIEF VALVE GP-RELIEF VALVE GP-RELIEF VALVE GP-RELIEF ACTUATOR GP VALVE-FLOAT VALVE ACTUATOR GP VALVE VALVE GP-RELIEF CYL GP-LIFT CYL GP-LIFT (LOGGER) CYL GP-TILT CYL GP-TILT (LOGGER) CYL GP-TILT(HIGH LIFT) CYL GP-LIFT CYL GP LIFT(LOGGER) PUMP GP-IMPLEMENT IMPELLER COIL AS. VALVE GP-CHECK VALVE GP-CHECK VALVE GP-SOLENOID VALVE GP-SOLENOID FILTER VALVE GP-BALL VALVE GP VALVE GP-SOLENOID ORIFICE ADAPTER SENSOR GP VALVE GP-SHUTTLE VALVE GP-CHECK ACCUMULATOR 212-8746 212-8721 6E-4286 4T1860 125-9349 117-0161 117-0161 117-0160 117-0159 143-8912 217-6719 100-6731 6E-1291 217-6720 102-4156 172-5481 173-8613 168-6943 231-1955 191-3468 152-1644 173-8612 168-6942 216-8978 146-8990 148-2350 9T-3096 104-7108 151-7455 149-2610 166-4647 112-1817 9T-9552 152-8340 8J-6815 204-7143 143-9176 141-1481 207-1810 219-7983 178-1602 173-6753 9T-5134 149-2610 230-3633 229-0659 260-3160 D8 D8 D7 D8 D7 D7 C6 C7 C8 C8 D7 C6,C7 D7 E8 E8 E7 E7 E7 E6 E6 B7 B7 B7 D8 B8 B8 B8 B6 B8 C6 C6 C6 B7 B7 B5 B5 D5 F8 F7 F8 F8 F7 F6 F8 D8
SPRING (ADJUSTABLE)
LINE RESTRICTION (VARIABLE)
PRESSURE COMPENSATION
HYDRAULIC PNEUMATIC ENERGY TRIANGLES
LINE RESTRICTION
VARIABLE and PRESSURE COMPENSATED
Schematic Location
B3 B3 B2,B3 B2,B3 B2 B2 B4 F2,F3 C2 C2 E2 C2 C3 D3 D4 D4 D4 D4 D4 D3 D3 E4 E4 C4 C4 C3 C3 C3 B1 C1 C2 C2 C1 B1 B2 C3 C2 C1 B1 B1 C4 C4 B2 B2 E2 F3 F3 F2 F1 F1 F4,E4
LINES CROSSING
LINES JOINING
SINGLE ACTING
DOUBLE ACTING
HYDRAULIC PUMPS
The accumulator charging valve (11) is located on the right side of the machine between the hydraulic tank (2) and the rear frame. The brake pressure switch (45) sends a signal to the Caterpillar Monitoring System. 29. Brake/pilot pump 91. Axle cooling pumps The ride control accumulator (85) is mounted horizontally along the inside of the front right side of the frame, to the rear of the front axle housing.
ONE POSITION
TWO POSITION
THREE POSITION
TWO-WAY
THREE-WAY
FOUR-WAY
CONTROL VALVES
CHECK VALVES
79
AB
AB
P T NORMAL POSITION
P T SHIFTED POSITION
INFINITE POSITION
Component Locations
Item
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51
FIXED DISPLACEMENT VARIABLE DISPLACEMENT NON-COMPENSATED
HYDRAULIC MOTORS
FIXED DISPLACEMENT VARIABLE DISPLACEMENT ຫໍສະໝຸດ BaiduON-COMPENSATED
INTERNAL PASSAGEWAYS
INFINITE POSITIONING THREE POSITION TWO POSITION
PRESSURE
TEMPERATURE
FLOW
UNIDIRECTIONAL
BIDIRECTIONAL
988H Wheel Loader Hydraulic System
BXY 1-UP 409 1-UP
FLUID STORAGE RESERVOIRS
VENTED
PRESSURIZED
RETURN ABOVE FLUID LEVEL
RENR6219 July 2005
FLUID POWER SYMBOLS
BASIC COMPONENT SYMBOLS
MAIN AUX.
43 K J 12 32 8 2
8. 8. 2. 32. 12. 43. F. K. J. 33. Front brake accumulator Rear brake accumulator Hydraulic tank Pilot relief valve Pilot filter Vacuum breaker relief valve Pilot pressure tap Rear Accumulator Pressure tap Front Accumulator Pressure tap S.O.S tap
29 45 91 2 85
PUSH-PULL LEVER
MANUAL SHUTOFF
GENERAL MANUAL
PUSH BUTTON
PEDAL
SPRING
PILOT CONTROL SYMBOLS
RELEASED PRESSURE REMOTE SUPPLY PRESSURE
EXTERNAL RETURN
Description
TANK AS. TANK GP SCREEN AS. SCREEN GP SCREEN TUBE-BAFFLE VALVE GP-PILOT ACCUMULATOR GP COOLER
Part Number Steering and Brake System
152-3870 153-3602 9T-9227 7J-2656 178-0182 1U-1570 143-2855 220-1432 164-0058 6E-1454 133-7102 115-2129 150-7585 133-8608 133-8609 4T-1860 6E-6188 6E-4286 9T-7419 1T-0936 6E-3986 2U-7345 135-3288 133-8173 149-4617 146-7571 153-9624 176-7520 176-7521 177-8924 189-8628 186-6218 139-3544 8C-3446 3G-8607 166-4647 6E-5566 213-5268 9T-3752 228-3636 228-3638 207-0695 9T-3096 104-7108 133-1963 220-0812 220-2948 175-3244 200-0866 169-8258 106-1774 174-4312 174-1552 131-0427 212-8712
ATTACHMENT
VALVE ENVELOPES
VALVES
VALVE PORTS
VALVE GP-COOLER BYPASS VALVE GP-BRAKE FILTER GP PUMP GP-SUPPLEMENTAL STER VALVE GP-STER VALVE GP-SHUTTLE VALVE GP-RELIEF VALVE GP-PRESS REDUCING VALVE GP-RELIEF PLUG-ORIFICE VALVE GP-RELIEF VALVE GP-DIVERTER CYLINGER GP-RIGHT CYLINGER GP-LEFT VALVE GP-CHECK VALVE GP-NEUTRALIZER PUMP GP-STEER VALVE GP-COMP VALVE GP-COMP PUMP GP-BRAKE/PILOT VALVE GP VALVE GP VALVE GP-RELIEF VALVE - FLUID SAMPLING VALVE GP-CHECK FILTER VALVE GP-SELECTOR MOTOR GP-PISTON VALVE GP-CHECK PUMP GP-FAN VALVE GP-COMP VALVE-CHECK VALVE-CHECK VALVE GP-BREAKER & RELIEF TANK GP-EXPANSION SWITCH AS.-PRESSURE VALVE GP CONTROL GP-FOOT BRAKE VALVE GP-BRAKE SWITCH AS.-PRESSURE BRAKE GP-PARK-B SENSOR GP-TEMP
33
PUMP or MOTOR FLUID CONDITIONER SPRING
CONTROL VALVES
RESTRICTION
LINE RESTRICTION (FIXED)
2-SECTION PUMP
PUMP: VARIABLE and PRESSURE COMPENSATED
VARIABILITY
78 8 29
The ride control solenoid (79) is located in the front frame behind and above the front axle housing. The ride control solenoid is an ON/OFF solenoid. When the ride control solenoid is energized the head end of the lift cylinders are connected to the ride control accumulator to absorb the shock that occurs when roading the machine. The ride control solenoid is a part of the ride control valve group (78).
BASIC SYMBOL
SPRING LOADED
SHUTTLE
PILOT CONTROLLED
F
MEASUREMENT
ROTATING SHAFTS
The brake/pilot pump (29) is mounted to the right rear side of the pump drive. The brake/pilot pump supplies oil flow to the brake hydraulic system and pilot oil to the steering hydraulic system and the implement hydraulic system.
INTERNAL RETURN
SIMPLIFIED
COMPLETE
INTERNAL SUPPLY PRESSURE
ACCUMULATORS
CROSSING AND JOINING LINES
HYDRAULIC AND PNEUMATIC CYLINDERS
SPRING LOADED
GAS CHARGED
RETURN BELOW FLUID LEVEL
COMBINATION CONTROLS
11
SOLENOID
SOLENOID or MANUAL
SOLENOID and PILOT
SOLENOID and PILOT or MANUAL
SERVO
THERMAL
DETENT
MANUAL CONTROL SYMBOLS