Operating Instructions
Contents
1. 6 3 TAKING INTO AT 7 31 SETTING UP ASSEMBLY CONNECTING UP essen eene enne 7 3 2 TAKING esse 7 OPERATION WEE 8 41 EE 8 AD LOWERING deu d edens 8 4 3 ADJUSTING THE LOWERING SPEED cccccsesssssceeccceeeeeeesssssnceseeceeeesesssssseesseeeeeess 9 4 4 ADJUSTMENT OF THE LIFTING END STOP SWITCH WHEN ON HAND 10 5 TAKING OUT 11 67 INSPECTION 12 6 1 INSPECTION BEFORE THE FIRST USE ssssscssceeeeeeeesssssceesseeeeeesessssssesseeeeeeess 12 6 2 ee 12 E eet RE 13 7 7 1 7 2 7 3 7 4 7 5 7 6 7 7 7 8 7 9 8 8 1 8 2 8 3 8 4 8 5 8 6 8 7 9 9 1 9 2 9 3 10 Operating Instructions INSPECTION SERVICE 14 MAINTENANCE PLAN nasse Rs Soe oe ok 16 cas sot bts Bal is Sect cs 16 Ee e 16 MAINTENANCE THE 5 17 OIL CHANGE INTERVALS ee 17 CHECKING THEOILEEVER Saas 18 ON H NGE A A TE Cou Se 18 BLEEDING THE 5 18 CONTROL OF THE HYDRAULIC 19 FAULT EINDING eu 20 ELECTRIC MOTOR2. O z 880 0E OL z5 2 28 3 H18 185881 YIe LE Bunuerpag O Z 880 0E OL LS g 0600 022 8 75 07 IYAOEZ Ste 518 O E 574 OE EA S 0600 022 8 75 07 JVAOEC Ste ey ste ay g 0 Sr2 OE ZA 7 8 110 ADEE ZMNO 7 Z 10425 982 1570 43710 edung gt Oe LA E 48 QW vg 779 37 vg 7 Z1Ny9S 10 VON ALGFLO 77 37 8g jevtg y o l LD MAE 7 7 E adundat The apAy pr LH L 43 1843 1229 Bunuystezeg uar jaurn d 1 0 td 18 N A03 AWS AN Haftschilder Art Nr 10 33 334 10 33 358 10 33 242 10 33 237 max 1000 kg Tal EC Declaration of Conformity Conforming to EC Directives Machines 98 37 EG appendix 1 A EC Directives Electromagnetic compatibility 89 336 EWG EC Directives Low voltage 73 23 EWG Gruse Maschinenbau GmbH amp Co KG Dibbetweg 32 31855 Aerzen Germany declare in general responsibility that the product ELS 1 10 5 convered by this declaration confirms to the Health and Safety rules laid down by the directives above The following Norms were used for the proper implemention of the EC Directives on Health and Safety DIN EN ISO 12100 1 2003 DIN EN ISO 12100 2 2003 DIN EN 294 1992 DIN EN 349 1993 BGR 500 2004 DIN EN 1570 1998 DIN EN 1570 A1 2004 DIN EN 60204 1 1997 BGV A3
3. 1997 DIN EN 61000 6 2 2001 DIN EN 61000 6 4 2001 Gruse Maschinenbau GmbH amp Co KG Kraft 2007 10 19
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5. cable is defect Replace cable 21 Operating Instructions 8 7 Lifting machine sinks strongly by placement of load e Bleed hydraulic system e Drive table repeatedly 2 3 sec against the mechanical end stop Air in hydraulic system Hydraulic feed hose too long e Hoses of more than 3m only tables whose pump is from table to pump outside the table should be avoided 22 Operating Instructions 9 General 9 1 Transport Damage All deliveries are to be insured by the customer We must turn down any possible claims concerning transport responsibility Our responsibility is restricted to the hand over of the machine in brand new condition to the shipping agent Should you discover any damage to the machine do not use it and contact the shipping agent concerning the damage 9 2 Warranty Every machine is covered by a 12 months warranty against material faults and incorrect assembly The warranty covers all parts that are returned post free within twelve months for inspection The parts will then be inspected by us to determine whether the parts were damaged under normal use The warranty will be declared void if the parts are found to have been overloaded handled incorrectly or that replacement parts have been assembled incorrectly Ordering of spare parts Please give the following details when ordering Type Load Year of construction Serial Number Part description Order Number The addres
6. e Secure positioning of the machine e Avoid crush and shear zones between the machine and it s Surroundings e Ensure that the workplace remains clean and clear of obstacles 1 10 Conduct In An Emergency Footpump E Hydraulic Release the pump Release the raise lower lower pedal push button immediately immediately Switch of atthe mains remove the plug Secure against further By raised load support the load carrying component Operating Instructions 1 11 Picture Symbols Safety and Operational hints on the Lifting Table 6 4 2 3 4 5 gt e a m Nn nn L mme Sp 2 EE A lt 1 T C AN 1 2 3 4 5 1 Prohibited Stepping on Lifting of personnel with the exception of lifting tables intended for this purpose on the basis of certain preparations and safety provisions Accumulation of weight forbidden Prohibited Staying Grasping under an unsecured table Load must be evenly distributed surface load a N Lower the table onto the inspection support when carrying out repair and maintenance work alone You will find the maximum permissible load at the appendix of these instruction Operating Instructions 2 Safety Facilities 2 1 2 2 2 3 2 4 2 5 2 6 2 7 Inspection Support The unloaded machine should be lowered onto the inspection support before all repair and maintenance
7. qualified person e use the check list on the following page e make a photo copy of the list e note top right on the check list Lfd N check list number machine type serial number e cross each point when it is in order e put the machine back into use only when each point has been crossed e when completed put the check list into the appendix of these operating instructions 12 Operating Instructions 6 3 Check List Machine Type Mechanical OO 00000000 Cylinder pins secure All lever pins secure Inspection strut in order when on hand Wheel brakes in order when on hand Machine clean Stickers intact and readable Welded construction undamaged Machine holds the load in the maximum raised position for at least 10 minutes Protective folding screen undamaged when on hand All bolted connections tight Hydraulic 00000 No leaks in the hydraulic system Oil level correct No damage to the hoses see 7 5 Lowering speed correctly adjusted Flow control valve secured when on hand Electric 000000 Cable connections tight Cables secured No damage to cables Contact rail in order when on hand Battery is clean and in order when on hand All functions inspected without query Inspection date Inspector signature 13 Operating Instructions 7 Inspection Service Work should only be carried out on t
8. work see section 7 Aperture restriction in cylinder inlet Restricts the oil flow by the rupture of a hydraulic hose Lowering Brake Valve when on hand Fixed adjusted limitation of the oil flow lowering speed One Way Flow Restriction Valve when on hand Adjustable restriction of the oil flow lowering speed Attention adjustment is dependent on load Folding Screen when on hand Prevents grasping under the raised table Securing Device On Wheels transportable machines only The securing device brake prevents the unintentional movement of the machine Contact Frame when on hand The contact frame stops the lowering of the table when it comes in contact with an obstacle Raise the table with the raise button and remove the obstacle then complete the lowering process Operating Instructions 3 Taking into use For technical details see dimension sheet in appendix 3 1 Setting up Assembly Connecting Up 230 V 400 V During intallation of the lifting table it is important that the base frame when on hand in the area of the fixed bearings and the runner wheels is adequately supported with appropriate packing plates Danger Failure to comply with this instruction will result in loss of machine warranty Before taking into use it will be necessary to remove the crane parts when onhand which tighten the under frame together with the top frame Position the machine on a firm level underground The mach
9. DOES NOT BN EE 20 LIFTING MACHINE DOES 20 OLLOS He D 20 LIFTING MACHINE DOES NOT REACH MAXIMUM 21 LIFTING MACHINE WILL NOT COMPLETELY 21 CONTACT BOARD DOES NOT STOP THE TABLE SINKING 21 LIFTING MACHINE SINKS STRONGLY BY PLACEMENT OF LOAD 22 GENERALLA 23 TRANSPORT Re 23 WARRANTY ata AAN 29 ORDERING OF SPARE PARTS 23 APPENDIX QE 24 DIMENSION SHEET SPARE PART LIST HYDRAULIC SCHEMA ELECTRIC SCHEMA EC DECLARATION OF CONFORMITY Operating Instructions 1 Safety 1 1 Safety Hints in these Instruction Draws attention to the fact that disregard for these instructions could lead to serious or even deadly consequences Danger Draws attention to the fact that disregard of these instructions could under certain circumstances lead to injuries Z2 Caution Indicates that disregard of these instructions could lead to the damage of the machine or goods on the T machine e Work that is indicated by this symbol must be 1 carried out by competent tradesman electrician 1 industry fitter 1 2 Dangers of this machine This machine is equipped with safe
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11. Operating Instructions ELS 1 10 5 Serial N 70774 Date 2007 07 These operating instructions are a component part of the lifting machine They must be made available at all times for the operators information The operating instructions are to be delivered on sale of the machine Operating Instructions Contents 09 2004 1 SAPETY E 1 11 SAFETY HINTS IN THESE INSTRUCTION een 1 1 2 EREECHEN 1 1 3 REGULATORY APPLICATION 2 1 4 DANGER THROUGH ACCESSORIES enne nnne nennen 2 1 5 2 1 6 SOURCE OF DANGER a 3 1 7 el ET ele 4 1 8 PERSONAL SAFETY EQUIPMENT ccccccccscsssssseeeeeececceeccasseseeeeeeeeeeseccassesseeeees 4 1 9 SAFETY MEASURES IN THE WORK PLAGE 4 1 10 CONDUCT IN AN EMERGENCY dle e dt it te 4 1 11 PICTURE SYMBOLS n YR XP FE LC OE YE 5 2 SAFETY EIERE 6 ET We 6 2 2 APERTURE RESTRICTION IN CYLINDER INLET esee 6 2 3 LOWERING BRAKE VALVE WHEN ON HAND 6 2 4 ONE WAY FLOW RESTRICTION VALVE WHEN ON HAND 6 2 5 FOLDING SCREEN WHEN ON HAND Essen 6 2 6 X SECURING DEVICE ON WHEELS TRANSPORTABLE MACHINES ONLY 6 2 7 CONTACT FRAME WHEN ON HAND
12. dead mans operation e Observe the lettering picture symbols 4 1 Lifting 4 2 Lowering Operating Instructions 4 3 Adjusting the lowering speed when on hand Never grasp the table during the raising or lowering process Danger The lowering speed of the lifting device must not exceed 150 mm s The recommended lowering speed is 50 mm s Note It is not possible to use the maximum lowering speed allowed with some units due to their design An adjustment of the lowering speed should not be necessary adjusted at works Should an adjustment be necessary e g through replacement of the flow control valve then the following should be observed The one way flow control valve can be found on the pressure outlet of the hydraulic pump raise load loosen securing screw adjust valve as required securing screw tighten the securing screw lower the load measure the lowering rate with a stopwatch if necessary repeat the above procedure Operating Instructions 4 4 Adjustment of the lifting end stop switch when on hand Never grasp the table during the raising or lowering process Danger Select the contact point of the electrical switch so that the roller does not come into contact I with the mechanical end stop The end stop switch is there to limit the lifting of the table The switch can usually be found on the fixed pivot end of the table This position can change in the case of a special constructio
13. dix Operating Instructions 1 6 Source of Danger Where Scissors arms Scissors arms underframe Mechanic Crush and shear points Loss of limbs life Hydraulic components e g hoses What Because of damage oil could be sprayed out under high pressure Burns and contamination to the eyes Where Operating pedals Lifting Lowering Foot Pump Slipping off pedal Injury to the leg Current carrying components Current Touch Life threatening Work on the electrical and hydraulic components 7 should only be carried out by a competent tradesman Never remove alter take out of service the safety facilities Always secure that the machine is out of service when Setting up The alteration of the employment requirements The alteration of the operating procedure Maintenance Servicing Repair danger Operating Instructions 1 7 Qualified Operators The operator must be over 18 years old be instructed in the operation of the machine have proved to the firm that he is capable of operating the machine have clear and written instructions from the firm to operate the machine have read and understood the operating instructions must observe the operating instructions 1 8 Personal Safety Equipment For the operating of the machine e Safety shoes For cleaning maintenance repair e Safety shoes e Work gloves e Face protection 1 9 Safety Measures in the Work Place
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15. he Bauteile pnm 4 Wo gt Y1 p A Pos St ckzahl Benennung Best Nr Bemerkung Hydraulikaggregat 11 19 386 2 3kW 400V 50Hz Senkbremsventil 12 19 436 8 5 l min ventil 230 V AC 1 1 Leitungsbruch 10 19 292 sicherung Hydraulikzylinder 11 19 084 80 x 250 mm Hub 4 Dichtungssatz f r 50 97 091 80 mm Zylinder Hydraulikbauteile Se St ck Art Nr DN B I 1 10 19 103 1050 8 M 16x1 5 SW 19 M 16x1 5 SW 19 L Einstellbare T Verschraubung St ck Art Nr Baureihe DN A B 1 12 19 240 L 8 M 16x1 5 M 16x1 5 B B x i Gerade Einschraub Verschraubung T B St ck Art Nr Baureihe DN A B in 1 12 19 265 L 8 1 4 M 16x1 5 w al 1 12 19 267 L 8 M 14x1 5 M 16x1 5 Gerader Einschraubstutzen MES St ck Art Nr Baureihe DN A B 1 12 19 235 L 8 1 4 M 16x1 5 bel 1 12 19 258 L 8 3 8 M 16x1 5 Winkel Schwenkverschraubung St ck Art Nr Baureihe DN A B 2 12 19 261 L 8 3 8 M 16x1 5 Steckkupplung Messanschluss A St ck Art Nr Baureihe DN A 1 12 19 434 L 8 M 16x1 5 Magnetventil St ck Art Nr A B Bemerkung 5 1 10 19 463 1 4 1 4 598 2006 230V 19 W 0 1 Senkbremsventil p5 St ck Art Nr A Bemerkung 12 19 436 8 5 l min Leitungsbruchsicherung St ck Art Nr A SpaltmaB Bemerkung 1 10 19
16. he lifting table when it is unloaded and the issued inspection strut is in it s designated position The inspection strut can be found on or near the under frame Danger Operation e The unloaded scissor lift should be fully raised e position the strut in the lower pocket e hold the strut in a vertical position and lower the scissor lift Ensuring that the strut is in it s correct position Should it not be possible to raise the scissor lift using it s own drive then the platform should be raised using some suitable means hydraulic jack or crane The platform should be raised from the fixed pivot end It should be noted that a vacuum is produced in the cylinders when the scissor lift is raised using an external method and that they do not support the scissor lift hydraulically on a column of oil The scissor lift should be raised from the inspection strut using it s own hydraulic drive or an external hydraulic drive when service work is completed to ensure that the cylinders support the weight of the scissor lift LIFE THREATENING DANGER The inspection struts should never be removed by hammer blow or cutting before the lifting table has been raised from the service position using it s hydraulic drive An uncontrolled lowering of the scissor lift and platform could be the result Danger The inspection strut can be removed e by first raising the scissor lift a short distance e then remove the strut and
17. ine should be adjusted so that it is level Bolt the machine onto the concrete floor When the machine is to be connected into the factory ring main connect in a lockable mains switch to prevent unauthorised use This should only be performed by an electrician e Danger of stumbling because of cable e Damage to cable e g because of falling objects tools etc e It is forbidden to wind the cables around Danger mechanical components Every feed wire must be secured by 16 A Have you read the operating instructions and above all the safety points and above all understood them Then you can take the machine into use 3 2 Taking into use e Produce the electrical connection put the plug in e Check the motor rotation by three phase 400V Control by use of the red arrow on the motor casing when incorrect alter by changing the phases in the plug electrician only e Now you can take the machine into use An adequate and safe connection of the earth cable to the workpiece must be guaranteed when using a lifting table as a welding station Operating Instructions 4 Operation e No personnel should be within the danger zone when raising or lowering the table e Observe the picture symbols on the lifting machine Danger Short jerky raising and lowering is forbidden IS The machine then begins to oscillate and damage to the machine could be a result e Operate the machine with the remote cable push button control
18. m the tank Fill up with oil For volumes see dimension sheet in appendix Replace the breather bung Bleed the hydraulic system 7 8 Bleeding the hydraulic system Lower the table without a load onto the Loosen the bleed screws on the cylinder one or 1 9 inspection strut two turns e When no bleed screws are on hand the cylinders are so constructed as to bleed themselves e Operate the pump raise until oil is discharged from the bleed screws without air bubbles Check the oil level e Top up when necessary 18 Operating Instructions 7 9 Control of the hydraulic hoses H Control the following A yearly check on the hydraulic hoses for a safe working condition is stipulated The check must be carried out by a qualified tradesman e Can the following damage be observed on the outer mantel of the hose rips kinks cuts unbending abrasions or splitting e Are there any deformities in the hose when under or not under pressure e Are there any leaks between the hoses and the fittings Is the hose coming out of the fitting e When there is any damage the hose should be changed e Depending on the requirements the hoses should be changed at the latest after six years 19 Operating Instructions 8 Fault Finding Work on the electrical and hydraulic components should h only be carried out by a competent tradesman Danger Observe the safety instructions 8 1 Electric motor does not r
19. n table The end stop switch is adjusted by shifting it s position in the slotted rail Loosen fixing screws Adjust switching position Tighten fixing screws Check adjustment If necessary repeat the above procedure until correct Befestigungsschrauben Endschalter Langlochschiene Festpunkt Befestigungsschraube fixing screw Endschalter End stop switch Langlochschiene Slotted rail Festpunkt Fixed pivot 10 Operating Instructions 5 Taking out of use machine maintenance with cleaning for end of work inspection repair battery charging remove load footpump put inspection strut lower machine into position lower onto inspection strut fold up the foot pedal remove load put inspection strut into position lower machine lower onto inspection strut battery main switch into off position remove load put inspection strut into position lower machine lower onto inspection strut remove mains plug and or mains switch off 11 Operating Instructions 6 Inspection 6 1 Inspection before the first use 1 The machine is tested by the manufacturer before delivery Machines that are delivered not ready for use should be inspected by a qualified person in the following aspects correct construction correctness for use 6 2 Regular testing 1 Regular testing of machines at intervals of at the longest one year should be carried out by a
20. ndling and disposal of mineral oils is covered by laws Dispose of old oil at an authorised disposal unit Information can be found from the responsible authority Be careful not to spill any hydraulic oil Make precautions to catch any spilt oil oil resistant covers drip tray etc This machine is filled with bio oil on synthetic base This oil is not mixable with water The biological removable hydraulic oil is mixable with mineral oil but then it will loosen his biological removability The following or equivalent can be used Total Biohydran TMP 46 inthis machine BP Biohyd SE 46 e Fuchs Plantohyd 46S Esso Hydraulicoil HE 46 Total Equivis UVS 46 Shell Naturell HF E 46 7 5 Change Intervals The oil must be changed after the first 50 working hours thereafter at intervals of 500 hours or at the latest every 2 years 17 Operating Instructions 7 6 Checking the oil level Raise the table into its uppermost position Read the position in the oil gauge pipe The level must be at least in the lower quarter of the pipe When necessary top up the oil Breather bung Oil gauge pipe 77 Oil Change Lower the table without load onto its inspection strut Position a drip tray under the hydraulic cylinder Loosen the hose on the cylinder and lay into the e e e drip tray e Operate the pump raise until no more oil is discharged from the hose Reconnect the hose Remove the breather bung fro
21. return it to it s stowed position The operator should under no circumstances be positioned within the lifting table when performing this task 14 Operating Instructions Possible methods of using the inspection strut oh 75 A EST Dia 1 Inspection strut between upper and lower frame 6 TOA S ENN if Hj 9 0 Dia 2 Inspection strut between scissor arms Abb 3 Inspection strut between roller and frame 15 Operating Instructions 7 1 Maintenance Plan Check Bushes Every 250 hours 7 3 top up change 7 2 Cleaning Secure that the machine is out of use Danger Clean your machine regularly especially the stickers picture symbols on the machine when the stickers are no longer readable please order new ones order number see spare parts lists working areas of the rollers 7 3 Mechanical The machine is delivered with maintenance free bushes Therefore the bushes only have to be checked regularly 250 working hours for wear 16 Operating Instructions 7 4 Maintenance of the hydraulics Danger Hydraulic oil can cause irritation and skin rashes Avoid prolonged skin contact and wash the skin thoroughly after contact Wear protective clothing see chapter 1 8 Protect the environment The ha
22. ruck working max 180 bar Anordnung Aggregat positioning of drive unit innerhalb inside lf llmenge oil filling ea 2 Olsorte kind of hydraulic ot Bio l biooil Hydraulikzylinder hydraulic 1 x 80 x 250 mm Hub stroke 71 9166 G OlL L 574 119 399A ipusBeJ1isqies gn tuosuy 3 S 499 194980 Stuckliste Mechanische Bauteile 14 Nr Beme 1 Schere au en 5011272 1 Schere inneen 504122 Fest und 10 16 160 45 x 70 geg em Laufrole mon 4299474 4 Zylinderbolzen 50 82 064 40 x 110 6kt Schraube 12 51 081 ISO 4017 M10x30 8 8 Benennung Best rkun 12 40 425 DIN 128 A10 FSt 6kt Schraube 12 50 281 ISO 4014 M8x80 8 8 Sicherungsmutter 12 55 042 DIN 985 M8 8 55 57 231 DIN 668 S235JRG2K 40x621 St ckzahl ___1 t 8 4 f 8 Stuckliste Mechanische Bauteile lt gt 2 Pos St ckzahl Benennung Best Nr Bemerkung 50 02 556 1500 x 800 mm 50 02 375 1500 x 750 mm 1 Inspektionsstiitze 56 67 295 Kontaktleiste Art Nr 12 55 038 L 25 mm 12 55 039 L 40 mm 12 23 028 12 15 539 12 16 521 12 23 503 10 28 084 19 27 661 Stuckliste Hydraulisc
23. s for ordering is to be found on the cover of this operating instructions 23 Operating Instructions 10 Appendix 24 Technische Daten Technical ratings ELS 1 10 5 Mechanik Mechanics Traglast maxload 1000 kg Belastungsart nature of Flachenlast surface load Bauh he building height 200 mm Nutzhub effective stroke 1000 mm Tischplatte Ma e platform 5 x 1500 x 800 mm Glattblech plain sheet Unterrahmen bottom frame 1500 x 750 mm Hubzeit belastet lifting time ca 13 sec Senkzeit belastet sinking time ca 12 sec Gewicht weight ca 290 kg Elektrik Electric Leistung Hydraulikaggregat power 2 3 kW Stromaufnahme current consumption 55A Schutzart enclosure IP 55 Betriebsspannung operating voltage 400 V Steuerspannung control voltage 230 V Steuerung control system Totmann Handtaster 3m Deadman hand switch 3m Hydraulik Hydraulic Betriebsd
24. ty devices and is put through safety and quality control tests but there is a threat of danger by incorrect operation and misuse for the operator or other people in the vicinity for the machine and goods The danger zone is contained within the outer limits of the machine All personnel concerned with the Installation Setting Up Operation Maintenance Repair of the machine must have read and fully understood the operating instructions Operating Instructions 1 3 Regulatory Application Applications e Lifting of weights until maximum load e Working on the raised platform e Hand Forklifts Transporting of loads in the lowered position Prohibited e Lifting and transportation of personnel with the exception of lifting tables intended for this purpose on the basis of certain preparations and safety provisions e Setting up and operation of machines in the open Exception machines specially constructed for this purpose e Alterations and rebuilds of the machine Positioning of the load e Load should not overhang the platform e Unintentional shifting of the load should be prevented 1 4 Danger through accessories When the following Rollers Conveyer Belts other transport facilities are used the safety devices on the machine must not be made in operational through their use The danger zone is enlarged through the use of accessories 1 5 Emissions See dimension sheet in appen
25. un Current supply broken Check e Feed line e Fuse e Circuit breaker Motor is faulty Exchange hydraulic pump 8 2 Lifting machine does not lift Motor rotates in the wrong direction Check the motor rotation by three phase 400V Control by use of the red arrow on the motor casing when incorrect alter by changing the phases in the plug electrician only 8 3 Oilloss Leaks in the hydraulic system e re tighten fittings e replace cylinder seals e exchange cylinder e exchange hoses 20 Operating Instructions 8 4 Lifting machine does not reach maximum height Cause Cure Oil level too low see point 8 3 e top up oil 8 5 Lifting machine will not completely lower Cause Cure Machine is blocked by inspection strut Raise table and remove inspection strut Obstructions dirt in the rollers Clean working surfaces working ee Contact board has been activated Raise table remove by an obstacle obstacle and test the function of the contact board Contact board switch is defect Exchange switch Magnet lowering valve defect Exchange valve The neutral is incorrectly or not Check feed connected only 230 V 400 V 8 6 The contact board does not stop the table sinking Contact board is defect e g bent Exchange contact board The fixing screws of the contact re tighten screws board switch are loose and align contact board switch Contact board switch is defect Exchange switch Contact board switch
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