Komatsu PC750-7 BACKHOE, Shop Manual

Page 1: ...p PC800SE 7 40001 and up This shop manual may contain attachments and optional equipment that are not available in your area Please consult your local Komatsu distributor for those items you may requi...

Page 2: ...GENERAL 2 CONTENTS No of page 01 GENERAL 01 1 10 STRUCTURE FUNCTION AND MAINTENANCE STANDARD 10 1 20 TESTING AND ADJUSTING 20 1 30 DISASSEMBLY AND ASSEMBLY 30 1 90 OTHERS 90 1 Find manuals at https b...

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Page 9: ...and other clothes suited for welding work 4 When carrying out any operation with two or more workers always agree on the operating procedure before starting Always inform your fellow workers before s...

Page 10: ...trical fires 17 When removing piping stop the fuel or oil from spilling out If any fuel or oil drips onto the floor wipe it up immediately Fuel or oil on the floor can cause you to slip or can even st...

Page 11: ...tion may contain hydraulic circuit diagrams electric circuit diagrams and mainte nance standards TESTING AND ADJUSTING This section explains checks to be made before and after performing repairs as we...

Page 12: ...h item 3 Additional pages Additional pages are indicated by a hyphen and number after the page number File as in the example Example 10 4 10 4 1 10 4 2 10 5 REVISED EDITION MARK When a manual is revis...

Page 13: ...load with one rope alone but sling with two or more ropes symmetrically wound onto the load k Slinging with one rope may cause turning of the load during hoisting untwisting of the rope or slipping o...

Page 14: ...ressure from hydraulic tank 2 Hold adapter 1 and push hose joint 2 into mating adapter 3 See Fig 1 The adapter can be pushed in about 3 5 mm Do not hold rubber cap portion 4 3 After hose joint 2 is pu...

Page 15: ...ght until sliding pre vention ring 1 contacts contact surface a of the hexagonal portion at the male end 2 Hold in the condition in Step 1 and push until cover 3 contacts contact surface a of the hexa...

Page 16: ...ree bond 1735 790 129 9140 50 g Polyethylene container Quick hardening type adhesive Cure time within 5 sec to 3 min Used mainly for adhesion of metals rubbers plastics and woods Aron alpha 201 790 12...

Page 17: ...Adhesive for cab glass Used as primer for cab side Using limit 4 months SUNSTAR GLASS PRIMER 580 SUPER 20 ml Glass container Used as primer for glass side Using limit 4 months SUNSTAR PAINT PRIMER 435...

Page 18: ...4 7 27 34 59 74 98 123 153 190 1 2 1 5 2 8 3 5 6 7 5 10 12 5 15 5 19 5 16 18 20 22 24 24 27 30 32 36 235 285 320 400 455 565 610 765 785 980 23 5 29 5 33 41 46 5 58 62 5 78 80 100 27 30 33 36 39 41 46...

Page 19: ...iameter Width across flat Tightening torque Nm kgm mm mm Range Target 02 03 04 05 06 10 12 14 14 20 24 33 42 Varies depending on type of connector 35 63 3 5 6 5 84 132 8 5 13 5 128 186 13 0 19 0 363 4...

Page 20: ...g torque mm Nm kgm 6 8 10 12 14 8 0 2 10 0 2 12 0 2 24 0 4 36 0 5 0 81 0 0 20 1 02 0 0 20 1 22 0 0 20 2 45 0 0 41 3 67 0 0 51 Thread diameter Tightening torque inch Nm kgm 1 16 1 8 1 4 3 8 1 2 3 4 1 3...

Page 21: ...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 Priori ty Circuits...

Page 22: ...by 10 move the decimal point one place to the left to convert it to 55 mm 2 Carry out the same procedure as above to convert 55 mm to 2 165 inches 3 The original value 550 mm was divided by 10 so mult...

Page 23: ...3 819 0 315 0 709 1 102 1 496 1 890 2 283 2 677 3 071 3 465 3 858 0 354 0 748 1 142 1 536 1 929 2 323 2 717 3 110 3 504 3 898 0 1 2 3 4 5 6 7 8 9 0 10 20 30 40 50 60 70 80 90 0 22 05 44 09 66 14 88 1...

Page 24: ...700 20 341 22 983 25 625 2 113 4 755 7 397 10 039 12 680 15 322 17 964 20 605 23 247 25 889 2 378 5 019 7 661 10 303 12 944 15 586 18 228 20 870 23 511 26 153 0 1 2 3 4 5 6 7 8 9 0 10 20 30 40 50 60 7...

Page 25: ...62 0 1034 3 1106 6 1179 0 1251 3 1323 6 1396 0 28 9 101 3 173 6 245 9 318 3 390 6 462 9 535 2 607 6 679 9 752 2 824 6 896 9 969 2 1041 5 1113 9 1186 2 1258 5 1330 9 1403 2 36 2 108 5 180 8 253 2 325 5...

Page 26: ...92 2034 2176 2318 2460 2603 2745 2887 3030 3172 3314 3456 56 9 199 1 341 4 483 6 625 8 768 1 910 3 1053 1195 1337 1479 1621 1764 1906 2048 2190 2333 2475 2617 2759 2901 3044 3186 3328 3470 71 1 213 4...

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Page 28: ...the measuring units are indicated with Internatinal System of units SI As for reference conventionally used Gravitational System of units are indicated in parentheses Example N kg Nm kgm MPa kg cm2 kP...

Page 29: ...PC750 800 7 01 1 SPECIFICATION DRAWINGS 01 2 SPECIFICATIONS 01 4 WEIGHT TABLE 01 10 FUEL COOLANT AND LUBRICANTS 01 14 01 GENERAL...

Page 30: ...01 2 PC750 800 7 GENERAL SPECIFICATION DRAWINGS 3 SPECIFICATION DRAWINGS BACKHOE SPECIFICATION DIMENSIONS WORKING RANGES...

Page 31: ...4 300 4 300 4 300 4 300 4 300 G Track overall length mm 5 810 5 810 6 330 5 810 5 810 H Length of track on ground mm 4 500 4 500 5 020 4 500 4 500 Min ground clearance mm 840 840 840 840 840 Working...

Page 32: ...01 3 1 PC750 800 7 GENERAL SPECIFICATION DRAWINGS 3 LOADING SHOVEL SPECIFICATION DIMENSIONS WORKING RANGES...

Page 33: ...0 E Height of machine cab mm 3 560 F Tail swing radius mm 4 245 G Track overall length mm 5 810 H Length of track on ground mm 4 500 Min ground clearance mm 840 Working range Unit PC750 7 Loading shov...

Page 34: ...ble grouser shoe width 710 mm kN kg rpm deg km h deg kPa kg cm2 333 4 34 000 6 8 16 Low speed 2 8 High speed 4 2 35 101 01 1 03 430 5 43 900 6 8 16 Low speed 2 8 High speed 4 2 35 102 97 1 05 Dimensio...

Page 35: ...ouble grouser 47 on each side Hydraulic system Hydraulic pump Type Delivery Set pressure l min MPa kg cm2 Variable displacement piston type HPV95 95 HPV95 95 gear type SAR80 8 Piston type 490 490 gear...

Page 36: ...Ground pressure standard double grouser shoe width 810 mm kN kg rpm deg km h deg kPa kg cm2 333 4 34 000 6 8 16 Low speed 2 8 High speed 4 2 35 86 3 0 882 Dimensions Overall length Overall width Over...

Page 37: ...ble grouser 51 on each side Undercarriage Hydraulic pump Type Delivery Set pressure l min MPa kg cm2 Variable displacement piston type HPV95 95 HPV95 95 gear type SAR80 8 Piston type 490 490 gear type...

Page 38: ...shoe width 710 mm kN kg rpm deg km h deg kPa kg cm2 362 8 37 000 6 8 16 Low speed 2 8 High speed 4 2 35 106 89 1 09 430 5 43 900 6 8 16 Low speed 2 8 High speed 4 2 35 105 91 1 08 Dimensions Overall...

Page 39: ...h side Assembly type double grouser 47 on each side Hydraulic system Hydraulic pump Type Delivery Set pressure l min MPa kg cm2 Variable displacement piston type HPV95 95 HPV95 95 gear type SAR80 8 Pi...

Page 40: ...eability Ground pressure standard double grouser shoe width 610 mm kN kg rpm deg km h deg kPa kg cm2 476 3 48 600 6 8 16 Low speed 2 8 High speed 4 2 35 124 1 26 Dimensions Overall length Overall widt...

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