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KOMATSU PW118MR-8 HYDRAULIC EXCAVATOR SHOP MANUAL WEBM008801 – PDF
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KOMATSU PW118MR-8 HYDRAULIC EXCAVATOR SHOP MANUAL WEBM008801 – PDF DOWNLOAD
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Description
KOMATSU PW118MR-8 HYDRAULIC EXCAVATOR SHOP MANUAL WEBM008801 – PDF DOWNLOAD
FILE DETAILS:
KOMATSU PW118MR-8 HYDRAULIC EXCAVATOR SHOP MANUAL WEBM008801 – PDF DOWNLOAD
Language : English
Pages : 986
Downloadable : Yes
File Type : PDF
SERIAL NUMBERS 30471 and up
IMAGES PREVIEW OF THE MANUAL:
TABLE OF CONTENTS:
KOMATSU PW118MR-8 HYDRAULIC EXCAVATOR SHOP MANUAL WEBM008801 – PDF DOWNLOAD
00 Index and foreword.................................................................................... 3 Table of contents.................................................................................... 4 Foreword and general information..................................................................... 12 Safety notice.................................................................................... 12 How to read the shop manual...................................................................... 17 Explanation of terms for maintenance standard.................................................... 19 Handling of hydraulic components................................................................. 21 Method of disconnecting and connecting push-pull type coupler.................................... 23 Handling of electric equipment................................................................... 26 How to read electric wire code................................................................... 36 Precautions when performing work................................................................. 39 Standard tightening torque table................................................................. 42 List of abbreviation............................................................................. 46 Conversion table................................................................................. 50 Shop Manual.......................................................................................... 55 01 Specification......................................................................................... 55 Contents............................................................................................. 56 Specifications....................................................................................... 57 Specifications drawing........................................................................... 57 Specifications................................................................................... 59 Table of weight.................................................................................. 62 Table of fuel, coolant and lubricants............................................................ 64 Shop Manual.......................................................................................... 65 10 Structure and function................................................................................ 65 Contents............................................................................................. 66 Engine and cooling system............................................................................ 68 Engine mount..................................................................................... 68 PTO.............................................................................................. 69 Cooling system................................................................................... 70 Power train.......................................................................................... 72 Power train overview............................................................................. 72 Front axle....................................................................................... 73 Transmission..................................................................................... 77 Rear axle........................................................................................ 79 Steering system.................................................................................. 84 Steering unit.................................................................................... 88 Priority valve................................................................................... 89 Swing circle..................................................................................... 90 Swing machinery.................................................................................. 91 Hydraulic system..................................................................................... 92 Hydraulic tank and filter........................................................................ 92 Hydraulic pump................................................................................... 94 Control valve....................................................................................106 CLSS.............................................................................................118 Function and operation by valve..................................................................122 PPC valve........................................................................................139 Brakes pump......................................................................................150 Swing motor......................................................................................151 Travel motor.....................................................................................157 Swivel joint.....................................................................................164 Solenoid valve...................................................................................166 PPC accumulator..................................................................................171 Holding valve....................................................................................172 Work equipment.......................................................................................177 Work equipment...................................................................................177 Dimensions of components.........................................................................180 Work equipment cylinder..........................................................................188 Shop Manual..........................................................................................193 20 Standard value table..................................................................................193 Contents.............................................................................................194 Standard value table.................................................................................195 Standard value table for engine..................................................................195 Standard value table for chassis.................................................................196 30 Testing and adjusting.................................................................................207 Contents.............................................................................................208 Testing and adjusting................................................................................209 Testing engine speed.............................................................................209 Testing exhaust temperature......................................................................210 Checking exhaust gas colour......................................................................211 Adjusting valve clearance........................................................................212 Testing compression pressure.....................................................................214 Testing blow-by pressure.........................................................................216 Testing engine oil pressure......................................................................217 Handling fuel system parts.......................................................................218 Releasing residual pressure from fuel system.....................................................218 Testing fuel pressure............................................................................219 Testing fuel return rate and fuel leakage........................................................220 Bleeding air from fuel circuit...................................................................222 Checking fuel circuit for leakage................................................................224 Testing and adjusting alternator belt tension....................................................225 Measuring the swing circle axial clearance.......................................................226 Checking and regulating pressure in the hydraulic circuits.......................................227 Testing and adjusting oil pressure in work equipment and travel circuits.........................228 Testing and adjusting swing and blade/outrigger circuit oil pressure.............................230 Testing control circuit basic pressure...........................................................232 Testing and adjusting oil pressure in pump PC control circuit....................................233 Testing LS differential pressure and adjusting LS valve..........................................235 Testing solenoid valve output pressure...........................................................237 Testing main pump flow rate......................................................................240 Testing and adjusting steering circuit oil pressure..............................................241 Testing the braking system pressure..............................................................243 Checking wear in the brake disks.................................................................246 Bleeding air from the brake lines................................................................247 Adjusting the parking brake......................................................................248 Travel hydraulic equipment checking procedure....................................................249 Testing and adjusting the automatic displacement control system in the travel motor..............250 Checking for leakages in the travel motor........................................................252 Checking and adjusting the speed of the travel propeller shaft...................................253 Adjustment of the speed sensor...................................................................255 Checking parts which cause hydraulic drift of work equipment.....................................256 Testing oil leakage..............................................................................258 Air bleeding from hydraulic circuits.............................................................260 Releasing residual pressure from the circuits....................................................263 Checking leakages in the steering cylinders......................................................264 Adjusting travel PPC valves clearance............................................................265 Wheel types set up...............................................................................266 Special functions of machine monitor.............................................................268 Handling voltage circuit of engine controller....................................................316 Preparation work for troubleshooting of electrical system........................................317 Procedure for testing diodes.....................................................................322 40 Troubleshooting.......................................................................................323 Contents.............................................................................................324 Failure code table and fuse locations................................................................328 Failure code table...............................................................................328 Failure code table of steering controller........................................................331 Fuse locations...................................................................................332 General information on troubleshooting...............................................................335 Points to remember when troubleshooting..........................................................335 Sequence of events in troubleshooting............................................................336 Checks before troubleshooting....................................................................337 Classification and procedures for troubleshooting................................................338 Information in troubleshooting table.............................................................339 Phenomena looking like troubles and troubleshooting Nos..........................................341 Connection table for connector pin numbers.......................................................344 T- branch box and T- branch adapter table........................................................380 Troubleshooting by failure code......................................................................383 Failure code [6B2JMA] – Travel hydraulic abnormality.............................................383 Failure code [2G00MA] – Brake oil pressure abnormality...........................................384 Failure code [989L00] Engine controller lock caution 1...........................................385 Failure code [989M00] Engine controller lock caution 2...........................................386 Failure code [989N00] Engine controller lock caution 3...........................................387 Failure code [AB00KE] Charge voltage low.........................................................388 Failure code [B@BAZG] Eng oil press. low.........................................................390 Failure code [B@BCNS] Eng coolant overheat.......................................................391 Failure code [B@HANS] Hyd. oil overheat..........................................................392 Failure code [CA111] ECM critical internal failure...............................................393 Failure code [CA115] Eng. Ne and Bkup speed sensor error.........................................396 Failure code [CA122] Charge air press sensor high error..........................................398 Failure code [CA123] Charge air press sensor low error...........................................400 Failure code [CA131] Throttle sensor high error..................................................402 Failure code [CA132] Throttle sensor low error...................................................404 Failure code [CA144] Coolant temp. sensor high error.............................................406 Failure code [CA145] Coolant temp. sensor low error..............................................408 Failure code [CA153] Charge air temp. sensor high error..........................................410 Failure code [CA154] Charge air temp. sensor low error...........................................412 Failure code [CA155] – Charge air temperature high speed derate..................................413 Failure code [CA187] Sensor sup. 2 volt. low error...............................................414 Failure code [CA221] Ambient air press. sensor high error........................................416 Failure code [CA222] Ambient air press. sensor low error.........................................418 Failure code [CA227] Sensor sup. 2 volt. high error..............................................419 Failure code [CA234] Eng. overspeed..............................................................420 Failure code [CA238] Ne speed sensor sup. volt. error............................................422 Failure code [CA271] IMV/PCV1 short error........................................................424 Failure code [CA272] IMV/PCV1 open error.........................................................425 Failure code [CA322] Injector #1 (L #1) system open/short error..................................426 Failure code [CA324] Injector #3 (L #3) system open/short error..................................428 Failure code [CA331] Injector #2 (L #2) system open/short error..................................430 Failure code [CA332] Injector #4 (L #4) system open/short error..................................432 Failure code [CA342] – Calibration code incompatibility..........................................434 Failure code [CA351] Inj. drive circuit error....................................................435 Failure code [CA352] Sensor sup. 1 volt. low error...............................................438 Failure code [CA386] Sensor sup. 1 volt. high error..............................................440 Failure code [CA435] Abnormality in engine oil pressure switch...................................442 Failure code [CA441] Battery voltage low error...................................................443 Failure code [CA442] Battery voltage high error..................................................444 Failure code [CA449] Rail press. very high error.................................................445 Failure code [CA451] Rail press. sensor high error...............................................446 Failure code [CA452] Rail press. sensor low error................................................448 Failure code [CA488] – Charge air temperature high torque derate.................................449 Failure code [CA553] Rail press. high error......................................................450 Failure code [CA559] Rail press. low error.......................................................451 Failure code [CA689] Eng. Ne speed sensor error..................................................454 Failure code [CA731] Eng. Bkup speed sensor phase error..........................................456 Failure code [CA757] All persistent data lost error..............................................457 Failure code [CA778] Eng. Bkup speed sensor error................................................458 Failure code [CA1633] KOMNET datalink timeout error..............................................460 Failure code [CA2185] Throttle sens. sup. volt. high error.......................................462 Failure code [CA2186] Throttle sens. sup. volt. low error........................................464 Failure code [CA2249] Rail press. very low error.................................................465 Failure code [CA2311] Abnormality in IMV solenoid................................................466 Failure code [D110KB] Battery relay drive short..................................................468 Failure code [D19JKZ] Personal code relay abnormality............................................470 Failure code [D862KA] GPS antenna discon.........................................................472 Failure code [DA22KK] Pump solenoid power low error..............................................474 Failure code [DA25KP] 5 V sensor 1 power abnormality.............................................477 Failure code [DA26KP] 5 V sensor 2 power abnormality.............................................480 Failure code [DA2RMC] CAN discon (Pump controller detected)......................................482 Failure code [DAF8KB] – Short circuit in camera power supply.....................................484 Failure code [DAFGMC] GPS module error...........................................................486 Failure code [DAFRMC] CAN discon (Monitor detected)..............................................488 Failure code [DDP4KX] – Disconnection in travel PPC pressure switch..............................490 Failure code [DDWCKZ] – Disconnection in direction control switches..............................492 Failure code [DLT4KA] – Disconnection in transmission speed sensor...............................494 Failure code [DFB1KZ] Service lever pot. 1 abnormality...........................................496 Failure code [DFB2KZ] Service lever pot. 2 abnormality...........................................498 Failure code [DFB3L8] Service lever1 potentio error..............................................500 Failure code [DFB4L8] Service lever2 potentio error..............................................502 Failure code [DFB5KZ] Service lever sPot. 1 abnormality..........................................504 Failure code [DFB6KZ] Service lever sPot. 2 abnormality..........................................506 Failure code [DGH2KB] Hydr oil sensor short......................................................508 Failure code [DH10KS] – Abnormality in 24V sensor power source...................................509 Failure code [DHPAMA] Pump press sensor abnormality..............................................510 Failure code [DHS5KX] Travel PPC sensor abnormality..............................................512 Failure code [DHX1MA] Overload sensor abnormality................................................514 Failure code [DV20KB] Travel alarm ground short..................................................515 Failure code [DW43MA] – Travel speed High abnormality............................................516 Failure code [DW43MA] – Travel speed Low abnormality.............................................517 Failure code [DW45KA] Swing brake sol discon.....................................................518 Failure code [DW45KB] Swing brake sol short......................................................520 Failure code [DW4AKB] – SUS lock Sol Short Circuit...............................................522 Failure code [DW4AKA] – SUS lock Sol Open Circuit................................................524 Failure code [DW4CKB] – PPC lock relay Short circuit.............................................526 Failure code [DW4CKA] – PPC lock relay Open Circuit..............................................528 Failure code [DW9KKA] Travel Forward Solenoid Open Circuit.......................................530 Failure code [DW9KKB] Travel forward speed sol short.............................................532 Failure code [DW9LKA] Travel reverse Solenoid Open Circuit.......................................534 Failure code [DW9LKB] Travel reverse solenoid short circuit......................................535 Failure code [DWB2KB] – Outrigger Sol. Short circuit right.......................................536 Failure code [DWB2KA] – Outrigger Sol. Open Circuit Right........................................538 Failure code [DWB3KB] – Outrigger Sol. Short Circuit left........................................540 Failure code [DWB3KA] – Outrigger sol. Open Circuit left.........................................542 Failure code [DWB4KB] – Outrigger blade sol. short circuit.......................................544 Failure code [DWB4KA] – Outrigger blade sol. open circuit........................................546 Failure code [DXA8KA] PC-EPC sol discon..........................................................548 Failure code [DXA8KB] PC-EPC sol short...........................................................550 Failure code [DXE7KA] Service current EPC2 open circuit..........................................552 Failure code [DXE7KB] Service current EPC2 short circuit.........................................554 Failure code [DXE8KA] Service current EPC3 open circuit..........................................556 Failure code [DXE8KB] Service current EPC3 short circuit.........................................558 Failure code [DXE9KA] Service current EPC4 open circuit..........................................560 Failure code [DXE9KB] Service current EPC4 short circuit.........................................562 Failure code [DXEAKA] Service current EPC1 open circuit..........................................564 Failure code [DXEAKB] Service current EPC1 short circuit.........................................566 Failure code [DY20KA] Wiper working abnormality..................................................568 Failure code [DY20MA] Wiper parking abnormality..................................................570 Failure code [DY2CKA] Washer drive open circuit..................................................572 Failure code [DY2CKB] Washer drive short circuit.................................................574 Failure code [DY2DKB] Wiper drive (fwd) short circuit............................................576 Failure code [DY2EKB] Wiper drive (rev) short circuit............................................578 Troubleshooting by failure code steering controller..................................................581 Failure code 0E3 Hydraulic gear valve sol short circuit..........................................582 Failure code 0E4 Hydraulic gear valve sol disconnection..........................................584 Failure code 0E5 Low speed gear valve sol short circuit..........................................586 Failure code 0E6 Low speed gear valve sol disconnection..........................................588 Failure code 0E7 High speed gear valve sol short circuit.........................................590 Failure code 0E8 High speed gear valve sol disconnection.........................................592 Failure code 0E9 High speed state short circuit..................................................594 Failure code 1E0 High speed state disconnection..................................................596 Failure code 1E1 Round valve sol short circuit...................................................598 Failure code 1E2 Round valve sol disconnection...................................................600 Failure code 1E3 Round valve sol short circuit...................................................602 Failure code 1E4 Round valve sol disconnection...................................................604 Failure code 1E5-1E7 2WS or LOCK valve sol short circuit.........................................606 Failure code 1E6-1E8 2WS and LOCK valve sol disconnection........................................608 Failure code 1E9 4WS valve sol short circuit.....................................................610 Failure code 2E0 4WS valve sol disconnection.....................................................612 Failure code 2E1 Enable transm. state short circuit Gnd..........................................614 Failure code 2E2 Hydr. gear state short circuit Gnd..............................................616 Failure code 2E3 F-N-R Abnormality error.........................................................618 Failure code 2E5 Gear engaged open circuit.......................................................620 Failure code 2E6 Speed sensor open circuit.......................................................622 Failure code 2E7 High/low speed Abnormality error................................................624 Failure code 2E8 Solenoid power supply error.....................................................626 Failure code 2E9 Wiper intermittent open circuit.................................................627 Failure code 3E0 Wiper continuos short circuit...................................................628 Failure code 3E1 Wiper continuos open circuit....................................................629 Failure code 3E2 Wiper intermittent short circuit................................................630 Failure code 3E3 Can Bus communication error.....................................................632 Troubleshooting of electrical system.................................................................635 Before carrying out troubleshooting of electrical system.........................................635 Information in troubleshooting table.............................................................638 E-1 When starting switch is turned ON, machine monitor displays nothing..........................640 E-2 Engine does not start (Engine does not turn).................................................643 E-3 Preheater does not operate...................................................................646 E-4 Automatic warm-up system does not operate (in cold season)...................................648 E-5 All work equipment, swing, and travel mechanism do not move or cannot be locked..............650 E-6 Precaution lights up while engine is running.................................................652 E-7 Emergency stop item lights up while engine is running........................................655 E-8 Engine coolant temperature gauge does not indicate normally..................................656 E-9 Hydraulic oil temperature gauge does not indicate normally...................................658 E-10 Fuel level gauge does not indicate normally.................................................661 E-11 Contents of display by machine monitor are different from applicable machine................663 E-12 Machine monitor does not display some items.................................................664 E-13 Function switch does not work...............................................................665 E-14 Auto-decelerator does not operate normally..................................................666 E-15 Working mode does not change................................................................667 E-16 Alarm buzzer cannot be stopped..............................................................669 E-17 Windshield wiper and window washer do not operate...........................................670 E-18 Swing holding brake does not operate normally...............................................673 E-19 Travel alarm does not sound or does not stop sounding.......................................674 E-20 Air conditioner does not operate normally (including air conditioner abnormality record)....675 E-21 While starting switch is in OFF position, service meter is not displayed....................688 E-22 Machine monitor cannot be set in service mode...............................................689 E-23 Monitoring function does not display lever control signal normally..........................690 E-24 KOMTRAX system does not operate normally....................................................712 Troubleshooting of hydraulic and mechanical system (H-mode)..........................................713 Information contained in troubleshooting table...................................................713 H-1 Speed or power of all work equipment, swing, and travel are low..............................714 H-2 Engine speed sharply drops or engine stalls..................................................715 H-3 No work equipment, travel and swing move.....................................................716 H-4 Abnormal noise is heard from around hydraulic pump...........................................717 H-5 Fine control performance or response of work equipment and travel is low.....................718 H-6 Speed or power of boom is low................................................................719 H-7 Speed or power of arm is low.................................................................720 H-8 Speed or power of bucket is low..............................................................721 H-9 Speed or power of boom swing is low..........................................................722 H-10 Speed or power of blade is low..............................................................723 H-11 Work equipment does not move in its single operation........................................724 H-12 Hydraulic drift of work equipment is large..................................................725 H-13 Time lag of work equipment is large.........................................................727 H-14 Work equipment loaded more is slower during compound operation..............................728 H-15 Boom RAISE speed is low in compound operation of swing + boom RAISE.........................729 H-16 Travel speed does not change or it is kept low or high......................................730 H-17 Machine does not swing......................................................................731 H-18 Swing acceleration, swing speed and swing power are low.....................................732 H-19 Excessive overrun when stopping swing.......................................................734 H-20 When upper structure stops swinging, it makes large shock...................................735 H-21 When upper structure stops swinging, it makes large sound...................................736 H-22 Hydraulic drift of swing is large...........................................................737 H-23 Flow rate in attachment circuit cannot be adjusted..........................................738 Troubleshooting of engine (S-mode)...................................................................739 Method of using troubleshooting chart............................................................739 S-1 Starting performance is poor.................................................................743 S-2 Engine does not start........................................................................744 S-3 Engine does not pick up smoothly.............................................................747 S-4 Engine stops during operations...............................................................748 S-5 Engine does not rotate smoothly..............................................................749 S-6 Engine lacks output (or lacks power).........................................................750 S-7 Exhaust smoke is black (incomplete combustion)...............................................751 S-8 Oil consumption is excessive (or exhaust smoke is blue)......................................752 S-9 Oil becomes contaminated quickly.............................................................753 S-10 Fuel consumption is excessive...............................................................754 S-11 Oil is in coolant (or coolant spurts back or coolant level goes down).......................755 S-12 Oil pressure drops..........................................................................756 S-13 Oil level rises (Entry of coolant or fuel)..................................................757 S-14 Coolant temperature becomes too high (overheating)..........................................758 S-15 Abnormal noise is made......................................................................759 S-16 Vibration is excessive......................................................................760 50 Disassembly and assembly..............................................................................761 Contents.............................................................................................762 How to read this manual..............................................................................764 Coating materials list...............................................................................766 Engine and cooling system............................................................................769 Removal and installation of fuel supply pump assembly............................................769 Removal and installation of fuel injector assembly...............................................771 Removal and installation of front oil seal.......................................................773 Removal and installation of rear oil seal........................................................775 Removal and installation of cylinder head assembly...............................................778 Removal and installation of radiator assembly....................................................785 Removal and installation of aftercooler assembly.................................................787 Removal and installation of work equipment oil cooler assembly...................................789 Removal and installation of engine and work equipment pump assembly..............................791 Removal and installation of fuel tank assembly...................................................796 Power train..........................................................................................799 Removal and installation of swing motor..........................................................799 Removal and installation of swing machinery......................................................800 Disassembly and assembly of swing machinery......................................................802 Removal and Installation of swing circle.........................................................811 Removal and installation of priority valve.......................................................812 Removal and installation of steering unit........................................................813 Undercarriage and frame..............................................................................815 Removal and installation of complete front axle..................................................815 Removal and installation of complete rear axle...................................................817 Disassembly and assembly of axles................................................................819 Removal and installation of axle locking cylinders...............................................860 Removal and installation of the transmission.....................................................861 Disassembly and assembly of the transmission.....................................................863 Removal and installation of revolving frame......................................................873 Removal and installation of counterweight assembly...............................................876 Removal and installation of additional counterweight assembly....................................879 Hydraulic system.....................................................................................881 Removal and installation of travel motor.........................................................881 Disassembly and assembly of travel motor.........................................................883 Removal and installation of center swivel joint assembly.........................................889 Disassembly and assembly of center swivel joint assembly.........................................891 Removal and installation of hydraulic tank assembly..............................................892 Removal and installation of hydraulic pump assembly..............................................896 Removal and installation of control valve assembly...............................................899 Disassembly and assembly control valve...........................................................904 Removal and installation of brake pump...........................................................905 Removal and installation of travel PPC valve.....................................................907 Disassembly and assembly of work equipment PPC valve assembly....................................908 Removal and installation of boom swing cylinder assembly.........................................910 Removal and installation of cylinder for outriggers or blade.....................................913 Disassembly and assembly of hydraulic cylinder assembly..........................................915 Work equipment.......................................................................................921 Removal and installation work equipment assembly.................................................921 Removal and installation of boom swing bracket...................................................923 Removal and installation blade and outriggers....................................................926 Removal and installation blade and outriggers arms...............................................927 Cab and its attachment...............................................................................928 Removal and installation of operator cab assembly................................................928 Removal and installation of operator's cab glass (Stuck glass)...................................933 Removal and installation of front window assembly................................................943 Removal and installation of floor frame assembly.................................................944 Electrical system....................................................................................951 Removal and installation steering column assembly................................................951 Removal and installation of air compressor assembly..............................................952 Removal and installation of air conditioner condenser............................................954 Removal and installation of air conditioner unit assembly........................................956 Removal and installation of machine monitor assembly.............................................961 Removal and installation of pump controller assembly.............................................963 Removal and installation of engine controller assembly...........................................966 Removal and installation of KOMTRAX terminal assembly............................................967 90 Diagrams and drawings.................................................................................969 Contents.............................................................................................970 Hydraulic diagram....................................................................................971 Hydraulic diagram (1/2)..........................................................................971 Hydraulic diagram (2/2)..........................................................................973 Electrical diagram...................................................................................975 Electrical diagram (1/6).........................................................................975 Electrical diagram (2/6).........................................................................977 Electrical diagram (3/6).........................................................................979 Electrical diagram (4/6).........................................................................981 Electrical diagram (5/6).........................................................................983 Electrical diagram (6/6).........................................................................985
DESCRIPTION:
KOMATSU PW118MR-8 HYDRAULIC EXCAVATOR SHOP MANUAL WEBM008801 – PDF DOWNLOAD
General precautions
1) Before performing any greasing or repairs, read all the safety labels stuck to the machine. For the locations of the safety labels and detailed explanation of precautions, see the Operation and Maintenance Manual.
2) Locate a place in the repair workshop to keep tools and removed parts. Always keep the tools and parts in their correct places. Always keep the work area clean and make sure that there is no dirt, water, or oil on the floor. Smoke only in the areas provided for smoking. Never smoke while working.
3) When performing any operation, always wear safety shoes and helmet. Do not wear loose work clothes, or clothes with buttons missing.
A Always wear the safety glasses when hitting parts with a hammer.
B Always wear the safety glasses when grinding parts with a grinder, etc.
4) When performing any operation with two or more workers, always agree on the operating procedure before starting. Always inform your fellow workers before starting any step of the operation. Before starting work, hang UNDER REPAIR warning tag in the operator’s compartment.
5) Only qualified workers must perform the work and operation which require license or qualification.
6) Keep all tools in good condition, learn the correct way to use them, and use the proper ones. Before starting work, thoroughly check the tools, machine, forklift truck, service car, etc.
7) If welding repairs are needed, always have a trained and experienced welder perform the work. When performing welding work, always wear welding gloves, apron, shielding goggles, cap and other clothes suited for welding work.
8) Before starting work, warm up your body thoroughly to start work under good condition.
9) Avoid continuing work for long hours and take rests at proper intervals to keep your body in good condition and at the provided place.
S.S 21/12/24
