Komatsu WA470-6, Shop Manual

Page 1: ...is our policy to improve our products whenever it is possible and practical to do so We reserve the right to make changes or improvements at any time without incurring any obligation to install such c...

Page 2: ...1 10 STRUCTURE FUNCTION AND MAINTENANCE STANDARD 10 1 20 STANDARD VALUE TABLES 20 1 30 TESTING AND ADJUSTING 30 1 40 TROUBLESHOOTING 40 1 50 DISASSEMBLY AND ASSEMBLY 50 1 60 AIR CONDITIONER 60 1 90 D...

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Page 18: ...FOREWORD 00 2 16 1 WA470 6 WA480 6 12 MEMORANDA...

Page 19: ...o the ground If this is not possible insert the safety pin or use blocks to prevent the work equipment from falling In addition be sure to lock all the control levers and hang warning signs on them 3...

Page 20: ...le all parts again in their original places Replace any damaged part with new parts When installing hoses and wires be sure that they will not be damaged by contact with other parts when the machine i...

Page 21: ...structure but also serves as reference material for troubleshooting In addition this section gives the judgement standards when inspecting disassembled parts STANDARD VALUE TABLE This section explains...

Page 22: ...each item 3 Additional pages Additional pages are indicated by a hyphen and numbered after the page number File as in the example Example REVISED EDITION MARK 00 When a manual is revised an edition m...

Page 23: ...ith two or more ropes the force subjected to each rope will increase with the hanging angles The table below shows the variation of allowable load kg when hoist ing is made with two ropes each of whic...

Page 24: ...rarily is called the standard size and the range of difference from the standard size is called the tolerance The tolerance with the symbols of or is indicated on the right side of the standard size T...

Page 25: ...rference is in the standard range 4 Repair limit and allowable value or allowable dimension The size of a part changes because of wear and deformation while it is used The limit of changed size is cal...

Page 26: ...s wiring harnesses are more likely to be affected by the direct effects of rain water heat or vibration Furthermore during inspection and repair operations they are frequently removed and installed ag...

Page 27: ...the same time if water does enter it is difficult for it to be drained Therefore if water should get into the connector the pins will be short cir cuited by the water so if any water gets in immediate...

Page 28: ...nnectors apart Never pull with one hand B When removing from clips Both the connector and clip have stoppers which are engaged with each other when the connector is installed C When removing a connect...

Page 29: ...to make it too hot as this will cause short cir cuits If there is any damage or breakage replace the connector B Insert the connector securely Align the position of the connector correctly and then in...

Page 30: ...onnection Right figure A Push in female connector 2 horizontally until the lock clicks Arrow 1 B Since locks a and b may not be set completely push in female connector 2 while moving it up and down un...

Page 31: ...the risk that oil in the air may cause defective contact so remove all oil and water from the compressed air before blowing with air B Dry the inside of the connector with a dryer If water gets inside...

Page 32: ...lding on the body disconnect all wir ing harness connectors connected to the controller Attach an arc welding ground close to the welding point 6 Points to remember when troubleshooting electric circu...

Page 33: ...use unit exchange Disassembly and maintenance of hydraulic equipment should be car ried out in a specially prepared dustproof workshop and the perfor mance should be checked with special test equipmen...

Page 34: ...will mix with the new oil and will shorten the life of the hydraulic oil 6 Flushing operations After disassembling and assembling the equipment or changing the oil use flushing oil to remove the cont...

Page 35: ...ng to the following procedure 1 Slide lock L1 to the right 2 While pressing lock L2 pull out connector 1 toward you 3 Even if lock L2 is pressed connector 1 cannot be pulled toward you if part A does...

Page 36: ...3 in the direction of the arrow 114 engine see graphic 107 engine see graphic If the lock is on the underside use flat head screwdriver 1 since you cannot insert your fingers 2 While pressing up lock...

Page 37: ...ines 4 While pressing lock E of the connector pull out connector 5 in the direction of the arrow Injection pressure control valve of fuel supply pump PCV SUMITOMO 2 Speed sensor of fuel supply pump G...

Page 38: ...ccording to the following procedure A Turn housing H1 in the direction of the arrow When the connector is unlocked housing H1 becomes heavy to turn B Pull out housing H1 in the direction of the arrow...

Page 39: ...d hoses with tags to show their installation position to prevent any mistake when installing Check the number and thickness of the shims and keep in a safe place When raising components be sure to use...

Page 40: ...connecting wiring connectors clean the connector to remove all oil dirt or water then connect securely When using eyebolts check that there is no deformation or deterioration screw them in fully and a...

Page 41: ...ING SYSTEM Cylinder Head in the Disassembly and Assembly section 3 Checking engine piping for damage and looseness Intake and exhaust system Check the piping for damage the mounting bolts and nuts for...

Page 42: ...l flows out prepare an oil receiving container CONNECTION 00 1 Hold the hose adapter 1 or hose 5 and insert it in the mating adapter 3 aligning them with each other Do not hold the rubber cap portion...

Page 43: ...ce a of the hexagonal portion at the male end 2 Hold in the condition in Step 1 and turn the lever 4 to the right clockwise 3 Hold in the condition in Steps 1 and 2 and pull out the whole body 2 to di...

Page 44: ...tion at the male end 2 Hold in the condition in Step 1 and push until the cover 3 contacts surface a of the hexagonal portion at the male end 3 Hold in the condition in Steps 1 and 2 and pull out the...

Page 45: ...790 129 9040 250 g Polyethylene container Used as sealant for machined holes Holtz MH 705 790 126 9120 75 g Tube Used as heat resisting sealant for repairing engine Three bond 1735 179 129 9140 2 g Po...

Page 46: ...ing type Used as sealant for flywheel housing intake manifold oil pan thermostat housing etc Three bond 1211 790 129 9090 100 g Tube Used as heat resisting sealant for repairing engines Molybdenum dis...

Page 47: ...7 34 19 91 25 07 10 17 59 74 43 51 54 57 12 19 98 123 72 28 90 72 14 22 153 190 112 84 140 13 16 24 235 285 173 32 210 20 18 27 320 400 236 02 295 02 20 30 455 565 335 59 416 72 22 32 610 765 449 91 5...

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Page 49: ...mm mm Range Target 08 08 14 5 88 8 82 4 33 6 50 7 35 5 42 10 10 17 9 8 12 74 7 22 9 39 11 27 8 31 12 12 19 14 7 19 6 10 84 14 45 17 64 13 01 14 14 22 19 6 24 5 14 45 18 07 22 54 16 62 16 16 24 24 5 3...

Page 50: ...nal etc 5 65 0 32 5 23 4 6 37 Charging and signal 15 84 0 45 13 36 7 0 59 Starting Glow plug 40 85 0 80 42 73 11 4 135 Starting 60 127 0 80 63 84 13 6 178 Starting 100 217 0 80 109 1 17 6 230 Starting...

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