Kobelco SK210LC-9 Shop Manual Download Page 7

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21.1.2

UNLOAD VALVE CONTROL

(1) On starting any one of operations, the control pilot secondary pressure switches spools and

enters in respective low pressure sensors.

(2) The output voltage of low pressure sensor is input to mechatro controller and the mechatro

controller processes pilot signal and outputs command according to the input voltage to each

unload pressure proportional valve.

(3) Each unload pressure proportional valves output pilot secondary pressure according to the

command output by mechatro controller and switches each unload spools.

(4) With this operation, the bleed opening according to lever manipulated movement is obtained,

consequently the pump pressure which is used to actuate each actuators are delivered and

makes each actuator start operating.

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21. MECHATRO CONTROLLER

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21-6

Summary of Contents for SK210LC-9

Page 1: ...E G OPT 1 2 3 4 5 6 7 SPECIFICATIONS SECTION MAINTENANCE SECTION SYSTEM SECTION DISASSEMBLY SECTION TROUBLESHOOTING ENGINE SECTION PROCEDURE OF INSTALLING OPTIONS SECTION Book Code No S5YN0046E04 0 1...

Page 2: ...ANTI CAVITATION CONTROL 21 16 21 1 9 SWING PRIORITY CONTROL 21 18 21 1 10 TRAVEL STRAIGHT CONTROL 21 20 21 1 11 PRESSURE RELEASE CONTROL 21 22 21 1 12 N B SWITCH CONTROL OPTION 21 24 21 1 13 OPTION CO...

Page 3: ...ks First edition June 2013 SK210LC 9 YQ13 10001 S5YN2146E01 NA October 2013 SK210LC 9 YQ13 10001 North America Europe 21 MECHATRO CONTROLLER 21 2 Copyright 2015 Kobelco Construction Machinery Co Ltd A...

Page 4: ...zes the mechatro system and the function of the mechatro controller related apparatuses Regarding the conditions before and after each conversion refer to the hydraulic system and the electric system...

Page 5: ...SUMMARY OF MECHATRO CONTROL SYSTEM 21 1 1 MECHATRO CONTROL SYSTEM IN GENERAL 21 MECHATRO CONTROLLER 21 4 Copyright 2015 Kobelco Construction Machinery Co Ltd All rights reserved S5YN0046E03 0109CsCsh...

Page 7: ...ach unload pressure proportional valve 3 Each unload pressure proportional valves output pilot secondary pressure according to the command output by mechatro controller and switches each unload spools...

Page 9: ...ned 2 P Q control 1 The output voltage of high pressure sensor provided on each pump line is input to mechatro controller and the mechatro controller processes pilot signal and operates the command ac...

Page 11: ...lot proportional valve secondary pressure according to the command output by mechatro controller and changes P1 and P2 pump delivery rate and switches P1 and P2 unload pressure control valve 4 With or...

Page 13: ...trols recirculation rate and conflux rate The other proportional valves output proportional secondary pressure according to command from mechatro controller These proportional valves change the delive...

Page 14: ...l valve and P2 unload proportional valve 4 And also outputs command according to input pressure output by potentiometer to reverse proportional valve for arm 2 spool 5 Each proportional valves output...

Page 16: ...ot proportional valve secondary pressure according to the command output by mechatro controller and changes P1 and P2 pump delivery rate and switches P1 and P2 unload pressure control valves 4 With or...

Page 18: ...nload valves and travel straight valve of control valve 5 The tandem passage is connected to P2 port because of the travel straight valve switched and P1 pump delivery oil confluxes P2 pump delivery o...

Page 20: ...ve outputs pilot proportional valve secondary pressure according to the command output by mechatro controller and changes P1 and P2 pump delivery rate and switches P1 and P2 unload spool travel straig...

Page 22: ...ng to the high priority select pressure in the attachment system operating Boom arm bucket swing option pilot pressure during operation 2 P1 unload proportional valve Outputs switching pressure accord...

Page 24: ...ure release control to ECU and fixes engine speed to pressure release control speed 3 Outputs maximum command to P1 and P2 unload valves and each pilot secondary pressure fixes P1 and P2 unload valves...

Page 26: ...han above error display is output to gauge cluster 2 Breaker circuit 1 Select breaker mode through select switch 2 Breaker display appears on gauge cluster 3 The return oil from the breaker passes thr...

Page 28: ...P1 and P2 pump proportional valves P1 and P2 unload pressure proportional valves and travel straight proportional valve 4 Each proportional valves output pilot proportional valve secondary pressure a...

Page 29: ...AY Electro hydraulic conversion information is displayed on the multi display of the gauge cluster 1 Controls 2 Gauge cluster 21 MECHATRO CONTROLLER 21 28 Copyright 2015 Kobelco Construction Machinery...

Page 30: ...uel consumption value is 90 or less of the fuel consumption value of relief operation at H mode the green mark turns on common logic in each mode 21 3 Screen selection by work mode select switch The m...

Page 31: ...er mode switch 3 to select Breaker mode from attachment modes And selected Breaker mode is indicated Depending on the attachment employed select the applicable mode from Digging Nibbler and Breaker Be...

Page 32: ...nd Breaker the settings of 10 patterns are available Both Nibbler are set in conditions SET 6 as factory default in the above table at shipping Both Breaker are set in conditions SET 1 as factory defa...

Page 33: ...6 and select desired set number To set desired set number press NEXT ARROW SWITCH 7 8 Using switch UP ARROW SWITCH 5 or DOWN ARROW SWITCH 6 set the desired flow rate Then press menu switch 2 and the c...

Page 34: ...y c Press NEXT ARROW SWITCH 7 and BREAKER SETTING d is displayed 7 There are 10 steps from SET 1 to SET 10 Using switch UP ARROW SWITCH 5 or DOWN ARROW SWITCH 6 and select desired set number To set de...

Page 35: ...NG MODE to NIBBLER MODE or BREAKER MODE The flow rate indication screen b appears 3 When the display is flow rate indication screen b press Menu Switch to enter into USER MENU display c 4 Move cursor...

Page 36: ...ilter 500 Hr Hydraulic oil filter 1 000 Hr Hydraulic oil 5 000 Hr 1 Remaining time display to the engine oil change This display shows the remaining time of INTERVAL REMAINING TIME EXCHANGE DAY 21 8 M...

Page 37: ...AINING TIME EXCHANGE DAY 4 Remaining time display to the coming hydraulic oil change This display shows the remaining time of INTERVAL REMAINING TIME EXCHANGE DAY For the setting procedure of maintena...

Page 38: ...NSUMPTION as display c and press RIGHT arrow switch And Fuel Efficiency Graph display d appears 3 The graph indicates the fuel consumption from 12 hours ago to now in a 2 hour intervals And the values...

Page 39: ...eration 1 1 Clock display function Current time is displayed 1 2 Self diagnosis display When abnormality is detected on mechatro system like sensor proportional valve etc this displays error code 1 3...

Page 40: ...oil 3 Failure history display function Stores abnormality occurred on mechatro system in the past and displays in order of recent occurrence 4 Mechatro adjustment display Displays procedure for adjus...

Page 41: ...P switch 3 or DOWN switch 4 point the cursor to SERVICE ADJUST 1 display b Press NEXT switch 5 and SERVICE ADJUST 1 2 c is displayed 4 Using UP switch 3 or DOWN switch 4 point the cursor to CAMERA 1 S...

Page 42: ...5 Setting of camera Make sure that CAMERA 1 SETTING in SERVICE ADJUSTMENT1 2 screen is ON and CAMERA 2 and CAMERA 3 SETTING are OFF Check the setting No Parts Parts Normal condition Corrective action...

Page 43: ...and pin No refer to the section C 1 Mechatro controller explained later Electric circuit diagram or harness is available to identify wire No and wire color 2 I O configuration 3 Self diagnosis display...

Page 46: ...switch ON keeping buzzer stop switch pressed Buzzer stop switch 2 After logo mark is displayed the screen changes in service diagnosis mode The service diagnosis screen Mode No 1 Screen No 1 is displa...

Page 47: ...y screen list is shown below The conditions for display are H mode engine low speed and lever to neutral position 1 Service diagnosis mode No 1 21 MECHATRO CONTROLLER 21 46 Copyright 2015 Kobelco Cons...

Page 50: ...21 2 Service diagnosis mode No 2 3 Service diagnosis mode No 3 21 MECHATRO CONTROLLER 21 49 Copyright 2015 Kobelco Construction Machinery Co Ltd All rights reserved S5YN0046E03 0109CsCshWbYs...

Page 51: ...PSV P1 UL BPC P2 UL BPC BOOM RAISE BOOM LOWER ENG SPEED POWER SHIFT 11 0 to 16 0 M 11 0 to 16 0 M 560 to 750 mA 560 to 750 mA 360 mA 360 mA 3 0 M 0 0 M 1970 to 2030 0 mA 3 Service diagnosis data list...

Page 52: ...2 D 3 D 6 B 3 B 4 B 1 B 7 G 3 P1 PRES P2 PRES P1 PSV P2 PSV P1 UL BPC P2 UL BPC S TRAVEL ARM IN 2 ARM OUT ARM IN BOOM RAISE SWING ENG SPEED POWER SHIFT 33 0 to 35 8 M 33 0 to 35 8 M 415 to 525 mA 415...

Page 53: ...0 mA Operation No 10 Swing in full lever operation relief H mode Hi idle Operation No 11 Swing in full lever operation in operation H mode Hi idle No 24 ARM SWING No 24 ARM SWING C 1 C 2 E 1 E 2 D 1...

Page 54: ...3 0 M 0 0 M 1970 to 2030 0 mA Operation No 14 Bucket dump in full lever operation relief H mode Hi idle Operation No 15 Bucket dump in full lever operation in operation H mode Hi idle No 25 BUCKET No...

Page 55: ...0 mA Conflux switch is OFF Relief set pressure is value of shipping Operation No 18 Travel right in full lever operation travel idling H mode Hi idle Operation No 19 Travel left in full lever operati...

Page 56: ...arrow switch to move the item down 6 Turn the starter key switch OFF and the display is disappeared 21 21 2 4 TROUBLE HISTORY DIAGNOSIS The items of error detected by mechatro controller self diagnos...

Page 57: ...lter 1 000 Hr Hydraulic oil 5 000 Hr 1 The engine oil change time is displayed on the multi display by 500 hours as a warning but the buzzer does not sound 2 The fuel filter change time is displayed o...

Page 59: ...or to SWITCH STATUS Press RIGHT arrow switch to enter into SWITCH STATUS display d 3 Using UP or DOWN arrow switch move the cursor to AUTO IDLE STOP as display e 4 Press RIGHT arrow switch to enter in...

Page 60: ...or UP move cursor to CLOCK SETTING display Press NEXT to select CLOCK SETTING display d 3 Using switch DOWN or UP select YEAR MONTH DAY HOUR MINUTE display Press NEXT to select desired item 4 Using s...

Page 61: ...NEXT to select SCREEN SETTING display d 3 Move cursor to CONTRAST display d on SCREEN SETTING display Press NEXT to select desired value 4 Using cursor and get the desired values Step of adjustable ra...

Page 62: ...G display d 3 Using UP or DOWN arrow switch move the cursor to Brightness day as display e 4 Press RIGHT arrow switch and the display becomes as display f The background color of the value turns to be...

Page 63: ...display d 3 Using UP or DOWN arrow switch move the cursor to Brightness night as display e 4 Press RIGHT arrow switch and the display becomes as display f The background color of the value turns to b...

Page 64: ...mitation combination of return selector adjustment Engine speed ON OFF of engine rpm display Auto acceleration Adjustment the type of the engine speed of auto deceleration runs up abruptly Change of s...

Page 65: ...TRO CONTROL EQUIPMENT 1 C 1 Mechatro controller 1 Outside view 2 List of connectors 21 MECHATRO CONTROLLER 21 64 Copyright 2015 Kobelco Construction Machinery Co Ltd All rights reserved S5YN0046E03 01...

Page 70: ...cluster Mechatro controller CAN communication White 21 2 Gauge cluster symbol C 2 1 General view 2 Connector CN 600 Harness side 3 Connector CN 601 Harness side 4 Function a It processes signals by c...

Page 71: ...elect switch 8 Digging mode switch 9 Nibbler mode switch 10 Breaker mode switch 11 Up arrow switch 12 Down arrow switch 13 Next arrow switch 14 Back arrow switch 15 Back light LED 5 Summary of display...

Page 76: ...1 4 High pressure sensor LS52S00015P1 5 Low pressure sensor LC52S00019P1 21 MECHATRO CONTROLLER 21 75 Copyright 2015 Kobelco Construction Machinery Co Ltd All rights reserved S5YN0046E03 0109CsCshWbYs...

Page 78: ...COLOR CODING STANDARD FOR HYDRAULIC CIRCUITS 22 8 22 4 NEUTRAL CIRCUIT 22 8 22 5 TRAVEL CIRCUIT 22 10 22 6 BUCKET CIRCUIT 22 12 22 7 BOOM CIRCUIT 22 14 22 8 SWING CIRCUIT 22 18 22 9 ARM CIRCUIT 22 20...

Page 79: ...edition June 2013 SK210LC 9 YQ13 10001 S5YN2246E01 NA Revision October 2013 SK210LC 9 YQ13 10001 S5YN2246E02 North America Europe 22 HYDRAULIC SYSTEM 22 2 Copyright 2015 Kobelco Construction Machinery...

Page 80: ...circuits are built up with the following functions and features in order to achieve easy operability safety mass volume handling and low fuel consumption 22 HYDRAULIC SYSTEM 22 3 Copyright 2015 Kobel...

Page 81: ...8K2075 10 Pilot valve travel YN30V00105F2 11 Inline filter YN50V00020F1 Y 457400 12 Suction strainer LQ50V00004F1 13 Solenoid valve assy YN35V00047F3 8KWE5A 30 14 Filter element YN52V01016F3 FZ1F183S0...

Page 85: ...s transformed to the rise of output voltage corresponding to the pressure input by the low pressure sensor Mechatro controller signal processes this change of voltage resulting in rise of command curr...

Page 86: ...TRAL CIRCUIT Positive control function at safety lock lever down unlocked position 22 HYDRAULIC SYSTEM 22 9 Copyright 2015 Kobelco Construction Machinery Co Ltd All rights reserved S5YN0046E03 0109CsC...

Page 87: ...PCb and PCa ports switches the unloading spool in CLOSE side 22 5 2 2 SPEED TRAVEL SOLENOID COMMAND CIRCUIT AND AUTO 1st SPEED RETURN FUNCTION 1 Purpose Change travel motor speed with switch 2 Princip...

Page 88: ...22 TRAVEL CIRCUIT Travel 2nd speed RH LH simultaneous operation 22 HYDRAULIC SYSTEM 22 11 Copyright 2015 Kobelco Construction Machinery Co Ltd All rights reserved S5YN0046E03 0109CsCshWbYs...

Page 89: ...in STD specification travel bucket swing arm proportional voltage from low pressure sensor inputs in mechatro controller and then the engine speed returns to the dial set position corresponding to the...

Page 90: ...Bucket digging Travel straight conflux Auto accelation and Standby flow rate constant control 22 HYDRAULIC SYSTEM 22 13 Copyright 2015 Kobelco Construction Machinery Co Ltd All rights reserved S5YN004...

Page 91: ...ircuit and parallel circuit Since P1 unloading valve is closed the boom spool is moved and bypass circuit is closed the oil opens load check valve LCb through parallel circuit and flows into boom spoo...

Page 93: ...ver is at neutral the drain line on the lock valve CRb poppet spring chamber is closed which causes the poppet closed The result is that the oil returning from the boom cylinder head H to the boom spo...

Page 94: ...22 BOOM CIRCUIT Boom down operation Prevention of natural boom falling 22 HYDRAULIC SYSTEM 22 17 Copyright 2015 Kobelco Construction Machinery Co Ltd All rights reserved S5YN0046E03 0109CsCshWbYs...

Page 95: ...leased if the swing parking solenoid is de excited only when the secondary operating pressure in the swing and arm in actions acts upon any of the low pressure sensors SE 5 7 3 The swing parking solen...

Page 97: ...nd is flowed into arm 1 spool 2 On the other hand P1 pump delivery oil flows in P1 port of C V 2 and the flows in travel straight section and travel right tandem path Then because arm 2 spool was swit...

Page 98: ...CUIT Arm in Light load operation Arm variable recirculation Anti cavitation function 22 HYDRAULIC SYSTEM 22 21 Copyright 2015 Kobelco Construction Machinery Co Ltd All rights reserved S5YN0046E03 0109...

Page 99: ...ion and reduce rod pressure 3 Operation 1 P2 pump delivery oil flows in the travel left section through P2 port of C V 2 and branched off in by pass circuit and parallel circuit Consequently the arm s...

Page 100: ...M CIRCUIT Arm in Heavy load operation Arm confluence recirculation cut function 22 HYDRAULIC SYSTEM 22 23 Copyright 2015 Kobelco Construction Machinery Co Ltd All rights reserved S5YN0046E03 0109CsCsh...

Page 101: ...ows through arm 1 spool and confluences with P1 delivery oil opens lock valve of arm lock valve CRar with free flow and is flowed into arm cylinder rod R side through Ba port of C V 2 3 On the other h...

Page 103: ...P2 tandem circuit and travel straight spool 2 The delivery oil flowed into P1 parallel circuit of P1 pump opens check valve CP1 and LCb and flows in boom spool which exerts on boom up operation The d...

Page 104: ...BINED CIRCUIT Boom up Travel forward 1st speed operation Travel straight function 22 HYDRAULIC SYSTEM 22 27 Copyright 2015 Kobelco Construction Machinery Co Ltd All rights reserved S5YN0046E03 0109CsC...

Page 105: ...pressure flowing to arm cylinder and give a priority of the delivery of P2 pump to swing operation 3 Operation 1 The swing main circuit operates with P2 pump flow But on P2 pump circuit side the flow...

Page 106: ...22 COMBINED CIRCUIT Swing Arm in operation swing priority function 22 HYDRAULIC SYSTEM 22 29 Copyright 2015 Kobelco Construction Machinery Co Ltd All rights reserved S5YN0046E03 0109CsCshWbYs...

Page 107: ...mp flow rate to the minimum 2 Unloading proportional valves PSV D PSV B output secondary pressure and the secondary pressure flows in PCb PCa ports of C V 2 and switches the P1 P2 unloading valves to...

Page 108: ...22 PRESSURE DRAIN RELEASE CIRCUIT At pressure release mode 22 HYDRAULIC SYSTEM 22 31 Copyright 2015 Kobelco Construction Machinery Co Ltd All rights reserved S5YN0046E03 0109CsCshWbYs...

Page 110: ...PERATORS CONTROLS 23 33 23 5 5 UPPER ELECTRIC ASSY 23 35 23 5 6 UPPER HARNESS ASSY 23 36 23 5 7 UPPER HARNESS ASSY FLOOR PLATE 23 70 23 5 8 HARNESS ASSY REAR CAMERA 23 88 23 5 9 HARNESS ASSY OVER LOAD...

Page 111: ...edition June 2013 SK210LC 9 YQ13 10001 S5YN2346E01 NA Revision October 2013 SK210LC 9 YQ13 10001 S5YN2346E02 North America Europe 23 ELECTRICAL SYSTEM 23 2 Copyright 2015 Kobelco Construction Machiner...

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Kobelco SK210LC-9, Shop Manual, Page: 7 / 135

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