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KOMATSU PC450-8 PC450LC-8 PC450LCD-8 PC450LCHD-8 HYDRAULIC EXCAVATOR SHOP MANUAL – PDF DOWNLOAD
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KOMATSU PC450-8 PC450LC-8 PC450LCD-8 PC450LCHD-8 HYDRAULIC EXCAVATOR SHOP MANUAL – PDF DOWNLOAD
SERIAL NUMBERS
PC450-8 K50001and up
PC450LC-8 K50001and up
PC450LCD-8 K50001and up
PC450LCHD-8 K50001and up
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Description
KOMATSU PC450-8 PC450LC-8 PC450LCD-8 PC450LCHD-8 HYDRAULIC EXCAVATOR SHOP MANUAL – PDF DOWNLOAD
FILE DETAILS:
KOMATSU PC450-8 PC450LC-8 PC450LCD-8 PC450LCHD-8 HYDRAULIC EXCAVATOR SHOP MANUAL – PDF DOWNLOAD
Language : English
Pages : 1054
Downloadable : Yes
File Type : PDF
SERIAL NUMBERS
PC450-8 K50001and up
PC450LC-8 K50001and up
PC450LCD-8 K50001and up
PC450LCHD-8 K50001and up
IMAGES PREVIEW OF THE MANUAL:
TABLE OF CONTENTS:
KOMATSU PC450-8 PC450LC-8 PC450LCD-8 PC450LCHD-8 HYDRAULIC EXCAVATOR SHOP MANUAL – PDF DOWNLOAD
00 Index and foreword......................................................................... 3 Index..................................................................................... 3 Composition of shop manual............................................................ 4 Table of contents..................................................................... 6 00 Index and foreword......................................................................... 15 Foreword and general information.......................................................... 15 Safety notice......................................................................... 16 How to read the shop manual........................................................... 21 Explanation of terms for maintenance standard......................................... 23 Handling electric equipment and hydraulic component................................... 25 How to read electric wire code........................................................ 37 Precautions when carrying out operation............................................... 40 Method of disassembling and connecting push-pull type coupler......................... 43 Standard tightening torque table...................................................... 46 Conversion table...................................................................... 50 01 Specification.............................................................................. 57 Specification and technical data.......................................................... 57 Specification dimension drawings...................................................... 58 Specifications........................................................................ 60 Weight table.......................................................................... 62 Table of fuel, coolant and lubricants................................................. 64 10 Structure, function and maintenance standard............................................... 67 Engine and cooling system................................................................. 67 Engine related parts.................................................................. 68 Radiator, oil cooler and aftercooler.................................................. 69 10 Structure, function and maintenance standard............................................... 71 Power train............................................................................... 71 Power train........................................................................... 72 Final drive........................................................................... 74 Sprocket.............................................................................. 76 Swing machinery....................................................................... 78 Swing circle.......................................................................... 80 10 Structure, function and maintenance standard............................................... 83 Undercarriage and frame................................................................... 83 Track frame and recoil spring......................................................... 84 Idler................................................................................. 86 Carrier roller........................................................................ 88 Track roller.......................................................................... 89 Track shoe............................................................................ 90 10 Structure, function and maintenance standard............................................... 95 Hydraulic system, Part 1.................................................................. 95 Hydraulic equipment layout drawing.................................................... 96 Hydraulic tank and filter............................................................. 98 Hydraulic pump........................................................................ 100 10 Structure, function and maintenance standard............................................... 125 Hydraulic system, Part 2.................................................................. 125 Control valve......................................................................... 126 CLSS.................................................................................. 138 Functions and operation by valve...................................................... 142 Merge-divider valve................................................................... 157 Attachment circuit selector valve..................................................... 182 Holding valve......................................................................... 184 10 Structure, function and maintenance standard............................................... 191 Hydraulic system, Part 3.................................................................. 191 Valve control......................................................................... 192 PPC valve............................................................................. 194 Solenoid valve........................................................................ 210 PPC accumulator....................................................................... 212 Return oil filter..................................................................... 213 Centre swivel joint................................................................... 214 Travel motor.......................................................................... 215 Swing motor........................................................................... 227 Hydraulic cylinder.................................................................... 236 10 Structure, function and maintenance standard............................................... 239 Work equipment............................................................................ 239 Work equipment........................................................................ 240 Dimensions of components.............................................................. 242 10 Structure, function and maintenance standard............................................... 247 Cab and its attachments................................................................... 247 Air conditioner piping................................................................ 248 10 Structure, function and maintenance standard............................................... 251 Electrical system......................................................................... 251 Engine control........................................................................ 252 Electronic control system............................................................. 263 Monitor system........................................................................ 289 Sensor................................................................................ 317 KOMTRAX terminal system............................................................... 320 10 Structure, function and maintenance standard............................................... 323 Auto Grease system........................................................................ 323 Outline of Auto Grease System......................................................... 324 20 Standard value table....................................................................... 339 Standard service value table.............................................................. 339 Standard value table for engine related parts......................................... 340 Standard value table for chassis related parts........................................ 341 30 Testing and adjusting...................................................................... 351 Testing and adjusting, part 1............................................................. 351 Tools for testing, adjusting and troubleshooting...................................... 353 Measuring engine speed................................................................ 357 Measuring air boost pressure.......................................................... 358 Measuring exhaust temperature......................................................... 359 Measuring exhaust gas color........................................................... 360 Adjusting valve clearance............................................................. 361 Measuring compression pressure........................................................ 363 Measuring blow-by pressure............................................................ 365 Measuring engine oil pressure......................................................... 366 Handling fuel system parts............................................................ 367 Releasing residual pressure from fuel system.......................................... 367 Measuring fuel pressure............................................................... 368 Handling during cylinder cut-out operation............................................ 369 Handling during no injection cranking operation....................................... 369 Measuring fuel return rate and leakage................................................ 370 Bleeding air from fuel circuit........................................................ 373 Checking fuel circuit for leakage..................................................... 374 Checking and adjusting fan belt and alternator belt................................... 375 Checking and adjusting air conditioner compressor belt tension........................ 376 Measuring swing circle bearing clearance.............................................. 377 Checking and adjusting track shoe tension............................................. 378 Measuring and adjusting oil pressure in work equipment, swing, and travel circuits.... 379 Measuring control circuit basic pressure.............................................. 383 Checking and adjusting pump PC control circuit oil pressure........................... 384 Checking and adjusting pump LS control circuit oil pressure........................... 387 Measuring solenoid valve output pressure.............................................. 392 Measuring PPC valve output pressure................................................... 395 Adjusting play of work equipment and swing PPC valves................................. 396 Inspecting locations of hydraulic drift of work equipment............................. 397 Releasing residual pressure from hydraulic circuit.................................... 399 Measuring oil leakage amount.......................................................... 400 Bleeding air from various parts....................................................... 403 30 Testing and adjusting...................................................................... 407 Testing and adjusting, Part 2............................................................. 407 Special functions of machine monitor.................................................. 408 30 Testing and adjusting...................................................................... 465 Testing and adjusting, Part 3............................................................. 465 Handling voltage circuit of engine controller......................................... 466 Preparation work for troubleshooting of electrical system............................. 467 Procedure for testing diodes.......................................................... 472 Pm Clinic service..................................................................... 473 Undercarriage troubleshooting report.................................................. 479 40 Troubleshooting............................................................................ 481 Failure code table and fuse locations..................................................... 481 Failure codes table................................................................... 482 Fuse locations........................................................................ 485 40 Troubleshooting............................................................................ 489 General information on troubleshooting.................................................... 489 Points to remember when troubleshooting............................................... 490 Sequence of events in troubleshooting................................................. 491 Checks before troubleshooting......................................................... 492 Classification and troubleshooting steps.............................................. 493 Information in troubleshooting table.................................................. 494 Wiring table for connector pin numbers................................................ 499 T-adapter box and T-adapter table..................................................... 531 40 Troubleshooting............................................................................ 537 Troubleshooting by failure code (Display of code), Part 1................................. 537 Failure code [A000N1] Eng. Hi Out of Std.............................................. 539 Failure code [AA10NX] Air cleaner Clogging............................................ 540 Failure code [AB00KE] Charge Voltage Low.............................................. 542 Failure code [B@BAZG] Eng Oil Press. Low.............................................. 544 Failure code [B@BAZK] Eng Oil Level Low............................................... 546 Failure code [B@BCNS] Eng. Water Overheat............................................. 548 Failure code [B@BCZK] Eng Water Level Low............................................. 550 Failure code [B@HANS] Hydr Oil Overheat............................................... 552 Failure code [CA111] EMC Critical Internal Failure.................................... 553 Failure code [CA115] Eng Ne and Bkup Speed Sens Error................................. 553 Failure code [CA122] Chg Air Press Sensor High Error.................................. 554 Failure code [CA123] Chg Air Press Sensor Low Error................................... 556 Failure code [CA131] Throttle Sensor High Error....................................... 558 Failure code [CA132] Throttle Sensor Low Error........................................ 560 Failure code [CA135] Eng Oil Press Sensor High Error.................................. 562 Failure code [CA141] Eng Oil Press Sensor Low Error................................... 564 Failure code [CA144] Coolant Temp Sens High Error..................................... 566 Failure code [CA145] Coolant Temp Sens Low Error...................................... 568 Failure code [CA153] Chg Air Temp Sensor High Error................................... 570 Failure code [CA154] Chg Air Temp Sensor Low Error.................................... 572 Failure code [CA187] Sens Supply 2 Volt Low Error..................................... 574 Failure code [CA221] Ambient Press Sens High Error.................................... 576 Failure code [CA222] Ambient Press Sens Low Error..................................... 578 Failure code [CA227] Sens Supply 2 Volt High Error.................................... 580 Failure code [CA234] Eng Overspeed.................................................... 581 Failure code [CA238] Ne Speed Sens Supply Volt Error.................................. 582 Failure code [CA263] Fuel Temp Sensor High Error...................................... 584 Failure code [CA265] Fuel Temp Sensor Low Error....................................... 586 Failure code [CA271] IMV/PCV1 Short Error............................................. 587 Failure code [CA272] IMV/PCV1 Open Error.............................................. 588 Failure code [CA273] PCV2 Short Error................................................. 590 Failure code [CA274] PCV2 Open Error.................................................. 591 Failure code [CA322] Inj #1 Open/Short Error.......................................... 592 Failure code [CA323] Inj #5 Open/Short Error.......................................... 594 Failure code [CA324] Inj #3 Open/Short Error.......................................... 596 Failure code [CA325] Inj #6 Open/Short Error.......................................... 598 Failure code [CA331] Inj #2 Open/Short Error.......................................... 600 Failure code [CA332] Inj #4 Open/Short Error.......................................... 602 40 Troubleshooting............................................................................ 605 Troubleshooting by failure code (Display of code), Part 2................................. 605 Failure code [CA342] Calibration Code Incompatibility................................. 607 Failure code [CA351] Injectors Drive Circuit Error.................................... 608 Failure code [CA352] Sens Supply 1 Volt Low Error..................................... 610 Failure code [CA386] Sens Supply 1 Volt High Error.................................... 612 Failure code [CA441] Battery Voltage Low Error........................................ 614 Failure code [CA442] Battery Voltage High Error....................................... 616 Failure code [CA449] Rail Press Very High Error....................................... 618 Failure code [CA451] Rail Press Sensor High Error..................................... 622 Failure code [CA452] Rail Press Sensor Low Error...................................... 624 Failure code [CA553] Rail Press High Error............................................ 626 Failure code [CA554] Rail Press Sensor In Range Error................................. 627 Failure code [CA559] Rail Press Low Error............................................. 628 Failure code [CA689] Eng Ne Speed Sensor Error........................................ 630 Failure code [CA731] Eng Bkup Speed Sens Phase Error.................................. 632 Failure code [CA757] All Persistent Data Lost Error................................... 634 Failure code [CA778] Eng Bkup Speed Sensor Error...................................... 636 Failure code [CA1228] EGR valve servo error 1......................................... 638 Failure code [CA1625] EGR valve servo error 2......................................... 639 Failure code [CA1633] KOMNET Datalink Timeout Error................................... 640 Failure code [CA2185] Throt Sens Sup Volt High Error.................................. 642 Failure code [CA2186] Throt Sens Sup Volt Low Error................................... 643 Failure code [CA2249] Rail Press Very Low Error....................................... 644 Failure code [CA2271] EGR valve lift sensor high error................................ 646 Failure code [CA2272] EGR valve lift sensor low error................................. 648 Failure code [CA2351] EGR valve solenoid operation short circuit...................... 650 Failure code [CA2352] EGR valve solenoid operation disconnect......................... 652 Failure code [CA2555] Grid Htr Relay Volt High Error.................................. 654 Failure code [CA2556] Grid Htr Relay Volt Low Error................................... 656 Failure code [D110KB] Battery Relay Drive S/C......................................... 658 Failure code [DA25KP] 5V sensor power supply output 1 abnormality..................... 660 Failure code [DA2RMC] Pump Comm. Abnormality.......................................... 664 Failure code [DA2SKQ] Model Selection Abnormality..................................... 666 40 Troubleshooting............................................................................ 669 Troubleshooting by failure code (Display of code), Part 3................................. 669 Failure code [DA2RMC] CAN discon (Pump con detected).................................. 672 Failure code [DHPAMA] F Pump Press Sensor Abnormality................................. 674 Failure code [DHPBMA] R Pump Press Sensor Abnormality................................. 676 Failure code [DHS3MA] Arm Curl PPC Sen. Abnormality................................... 678 Failure code [DHS4MA] Bucket Curl PPC Press Sensor Abnormality........................ 680 Failure code [DW43KA] Travel Speed Sol. Disc.......................................... 682 Failure code [DW43KB] Travel Speed Sol. S/C........................................... 684 Failure code [DW45KA] Swing Brake Sol. Disc........................................... 686 Failure code [DW45KB] Swing Brake Sol. S/C............................................ 690 Failure code [DW91KA] Travel Junction Sol. Disc....................................... 692 Failure code [DW91KB] Travel Junction Sol. S/C........................................ 694 Failure code [DWJ0KA] Merge-divider Sol. Disc......................................... 696 Failure code [DWJ0KB] Merge-divider Sol. S/C.......................................... 698 Failure code [DWK0KA] 2-stage Relief Sol. Disc........................................ 700 Failure code [DWK0KB] 2-stage Relief Sol. S/C......................................... 702 Failure code [DXA0KA] PC-EPC Sol. Disc................................................ 704 Failure code [DXA0KB] PC-EPC Sol. S/C................................................. 706 Failure code [DXE0KA] LS-EPC Sol. Disc................................................ 708 Failure code [DXE0KB] LS-EPC Sol. S/C................................................. 710 Failure code [DXE4KA] Service Current EPC Disc........................................ 712 Failure code [DXE4KB] Service Current EPC S/C......................................... 713 Failure code [DY20KA] Wiper Working Abnormality....................................... 714 Failure code [DY20MA] Wiper Parking Abnormality....................................... 716 Failure code [DY2CKB] Washer Drive Short.............................................. 718 Failure code [DY2DKB] Wiper Drive (For) Short......................................... 720 Failure code [DY2EKB] Wiper Drive (Rev) Short......................................... 722 40 Troubleshooting............................................................................ 725 Troubleshooting of electrical system (E-mode)............................................. 725 Before carrying out troubleshooting of electrical system.............................. 728 Information contained in troubleshooting table........................................ 730 E-1 Engine does not start............................................................. 731 E-2 Auto-decelerator does not operate................................................. 734 E-3 Automatic warming-up system does not operate...................................... 736 E-4 Preheater does not operate........................................................ 738 E-5 All work equipment, swing, and travel mechanism do not move....................... 740 E-6 Power maximizing function does not operate........................................ 742 E-7 Machine monitor does not display at all........................................... 744 E-8 Machine monitor does not display some items....................................... 746 E-9 Contents of display by machine monitor are different from applicable machine...... 746 E-10 Fuel level monitor was lighted in red while engine running....................... 747 E-11 Engine coolant temperature gauge does not indicate normally...................... 748 E-12 Hydraulic oil temperature gauge does not indicate normally....................... 750 E-13 Fuel level gauge does not indicate normally...................................... 751 E-14 Swing lock monitor does not indicate normally.................................... 752 E-15 When monitor switch is operated, monitor displays nothing........................ 754 E-16 Windshield wiper and window washer do not operate................................ 756 E-17 Machine push-up function does not operate normally............................... 760 E-18 Monitoring function fails to display “boom raise” normally....................... 762 E-19 Monitoring function fails to display “boom lower” normally....................... 764 E-20 Monitoring function fails to display “arm IN” normally........................... 766 E-21 Monitoring function fails to display “arm OUT” normally.......................... 768 E-22 Monitoring function fails to display “bucket CURL” normally...................... 770 E-23 Monitoring function fails to display “bucket DUMP” normally...................... 772 E-24 Monitoring function fails to display “swing” normally............................ 774 E-25 Monitoring function fails to display “travel” normally........................... 776 E-26 Monitoring function fails to display “travel differential pressure” normally..... 778 E-27 Monitoring function fails to display “service” normally.......................... 780 E-28 KOMTRAX system does not operate normally......................................... 782 E-29 Air conditioner does not operate................................................. 784 E-30 Travel alarm does not sound or does not stop sounding............................ 786 E-31 Horn does not sound.............................................................. 788 40 Troubleshooting............................................................................ 791 Troubleshooting of hydraulic and mechanical system (H-mode)............................... 791 System chart for hydraulic and mechanical system...................................... 794 Information contained in troubleshooting table........................................ 796 H-1 All work equipment lack power, or travel and swing speeds are slow................ 798 H-2 Engine speed sharply drops or engine stalls....................................... 800 H-3 No work equipment, swing or travel move........................................... 801 H-4 Abnormal noise is heard from around hydraulic pump................................ 801 H-5 Auto-decelerator does not work.................................................... 802 H-6 Fine control mode does not function or responds slow.............................. 802 H-7 Boom moves slowly or lacks power.................................................. 803 H-8 Arm moves slowly or lacks power................................................... 804 H-9 Bucket moves slowly or lacks power................................................ 805 H-10 Work equipment does not move in its single operation............................. 805 H-11 Work equipment has a bit too fast hydraulic drift................................ 806 H-12 Work equipment has big time lag.................................................. 808 H-13 Other work equipment moves when relieving single circuit......................... 808 H-14 Power max. switch does not operate............................................... 808 H-15 Machine push-up function does not operate........................................ 809 H-16 In compound operation of work equipment, speed of part loaded more is low........ 810 H-17 When machine swings and raises boom simultaneously, boom rising speed is low..... 810 H-18 When machine swings and travels simultaneously, travel speed lowers largely...... 810 H-19 Machine deviates during travel................................................... 811 H-20 Travel speed is low.............................................................. 812 H-21 Machine is not steered well or steering power is low............................. 813 H-22 Travel speed does not change or travel speed is low or high...................... 814 H-23 Travel system does not move (only one side)...................................... 815 H-24 Upper structure does not swing................................................... 816 H-25 Swing acceleration or swing speed is low......................................... 818 H-26 Upper structure overruns remarkably when it stops swinging....................... 820 H-27 Large shock is made when upper structure stops swinging.......................... 821 H-28 Large sound is made when upper structure stops swinging.......................... 821 H-29 Hydraulic drift of swing is large................................................ 822 H-30 Attachment circuit is not changed................................................ 823 H-31 Oil flow in attachment circuit cannot be controlled.............................. 823 40 Troubleshooting............................................................................ 825 Troubleshooting of engine (S-mode)........................................................ 825 Method of using troubleshooting chart................................................. 827 S-1 Starting performance is poor...................................................... 830 S-2 Engine does not start............................................................. 832 S-3 Engine does not pick up smoothly.................................................. 836 S-4 Engine stops during operations.................................................... 837 S-5 Engine does not rotate smoothly................................................... 838 S-6 Engine lacks output (or lacks power).............................................. 839 S-7 Exhaust smoke is black (incomplete combustion).................................... 840 S-8 Oil consumption is excessive (or exhaust smoke is blue)........................... 841 S-9 Oil becomes contaminated quickly.................................................. 842 S-10 Fuel consumption is excessive.................................................... 843 S-11 Oil is in coolant (or coolant spurts back or coolant level goes down)............ 844 S-12 Oil pressure drops............................................................... 845 S-13 Oil level rises (Entry of coolant or fuel)....................................... 846 S-14 Coolant temperature becomes too high (overheating)............................... 848 S-15 Abnormal noise is made........................................................... 849 S-16 Vibration is excessive........................................................... 850 40 Troubleshooting............................................................................ 853 Troubleshooting of Auto Grease system..................................................... 853 50 Disassembly and assembly................................................................... 861 General information on disassembly and assembly........................................... 861 How to read this manual............................................................... 862 Coating materials list................................................................ 864 Special tools list.................................................................... 867 Sketches of special tools............................................................. 871 50 Disassembly and assembly................................................................... 875 Engine and cooling system................................................................. 875 Removal and installation of fuel supply pump assembly................................. 876 Removal and installation of fuel injector assembly.................................... 880 Removal and installation of engine front seal......................................... 886 Removal and installation of engine rear seal.......................................... 887 Removal and installation of cylinder head assembly.................................... 890 Removal and installation of radiator assembly......................................... 899 Removal and installation of hydraulic oil cooler assembly............................. 901 Removal and installation of aftercooler assembly...................................... 903 Removal and installation of engine and hydraulic oil pump assembly.................... 904 50 Disassembly and assembly................................................................... 913 Power train............................................................................... 913 Removal and installation of final drive assembly...................................... 914 Disassembly and assembly of final drive assembly...................................... 915 Removal and installation of swing motor and swing machinery assembly.................. 923 Disassembly and assembly of swing motor and swing machinery assembly.................. 924 Removal and installation of swing circle assembly..................................... 931 50 Disassembly and assembly................................................................... 933 Undercarriage and frame................................................................... 933 Disassembly and assembly of carrier roller assembly................................... 934 Disassembly and assembly of track roller assembly..................................... 936 Disassembly and assembly of idler assembly............................................ 937 Disassembly and assembly of recoil spring assembly.................................... 940 Removal and installation of sprocket.................................................. 942 Expansion and installation of track shoe assembly..................................... 943 Removal and installation of revolving frame assembly.................................. 945 Removal and installation of counterweight assembly.................................... 948 50 Disassembly and assembly................................................................... 951 Hydraulic system.......................................................................... 951 Removal and installation of centre swivel joint assembly.............................. 952 Disassembly and assembly of centre swivel joint assembly.............................. 954 Removal and installation of hydraulic tank assembly................................... 955 Removal and installation of control valve assembly.................................... 957 Disassembly and assembly of control valve assembly.................................... 960 Removal and installation of hydraulic pump assembly................................... 964 Removal and installation of oil seal in hydraulic pump input shaft.................... 967 Disassembly and assembly of work equipment PPC valve assembly......................... 968 Disassembly and assembly of travel PPC valve assembly................................. 969 Disassembly and assembly of hydraulic cylinder assembly............................... 970 50 Disassembly and assembly................................................................... 977 Work equipment............................................................................ 977 Removal and installation of work equipment assembly................................... 978 50 Disassembly and assembly................................................................... 983 Cab and its attachments................................................................... 983 Removal and installation of operator cab assembly..................................... 984 Removal and installation of operator cab glass (stuck glass).......................... 987 Removal and installation of front window assembly..................................... 997 Removal and installation of floor frame assembly......................................1004 50 Disassembly and assembly...................................................................1009 Electrical system.........................................................................1009 Removal and installation of air conditioner unit assembly.............................1010 Removal and installation of KOMTRAX communication modem assembly......................1013 Removal and installation of monitor assembly..........................................1014 Removal and installation of pump controller assembly..................................1016 Removal and installation of engine controller.........................................1018 90 Diagrams and drawings......................................................................1021 Hydraulic diagrams and drawings...........................................................1021 Hydraulic circuit diagram.............................................................1023 Hydraulic circuit diagram.............................................................1025 90 Diagrams and drawings......................................................................1029 Electrical diagrams and drawings..........................................................1029 Connector arrangement diagram 1.......................................................1031 Electrical circuit diagram K50001 - K50349 (1/5)......................................1033 Electrical circuit diagram K50001 - K50349 (2/5)......................................1035 Electrical circuit diagram K50001 - K50349 (3/5)......................................1037 Electrical circuit diagram K50001 - K50349 (4/5)......................................1039 Electrical circuit diagram K50001 - K50349 (5/5)......................................1041 Electrical circuit diagram K50350 - Up (1/5)..........................................1043 Electrical circuit diagram K50350 - Up (2/5)..........................................1045 Electrical circuit diagram K50350 - Up (3/5)..........................................1047 Electrical circuit diagram K50350 - Up (4/5)..........................................1049 Electrical circuit diagram K50350 - Up (5/5)..........................................1051
DESCRIPTION:
KOMATSU PC450-8 PC450LC-8 PC450LCD-8 PC450LCHD-8 HYDRAULIC EXCAVATOR SHOP MANUAL – PDF DOWNLOAD
General precautions
1) Before carrying out any greasing or repairs, read all the safety plates stuck to the machine. For the locations of the safety plates and detailed explanation of precautions, see the Operation and Maintenance Manual.
2) Decide 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 carrying out any operation, always wear safety shoes and helmet. Do not wear loose work clothes, or clothes with buttons missing.
A Always wear safety glasses when hitting parts with a hammer.
B. Always wear safety glasses when grinding parts with a grinder, etc.
4) When carrying out any operation with 2 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 signs in the operator’s compartment.
5) Only qualified workers must carry out 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 of them. Before starting work, thoroughly check the tools, machine, forklift, service car, etc.
7) If welding repairs are needed, always have a trained and experienced welder carry out the work. When carrying out 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.
S.S 28/12/24
