Hyundai HL770 Wheel Loader Service & Repair Manual

0-1 FOREWORD 1. STRUCTURE This service manual has been prepared as an aid to improve the quality of repairs by giving the serviceman an accurate understanding of the product and by showing him the correct way to perform repairs and make judgements. Make sure you understand the contents of this manual and use it to full effect at every opportunity. This service manual mainly contains the necessary technical information for operations performed in a service workshop. For ease of understanding, the manual is divided into the following sections. Structure and function This group explains the structure and function of each component. It serves not only to give an understanding of the structure, but also serves as reference material for troubleshooting. Operational checks and troubleshooting This group explains the system operational checks and troubleshooting charts correlating problem to remedy. Tests and adjustments This group explains checks to be amide before and after performing repairs, as well as adjustments to be made at completion of the checks and repairs. Disassembly and assembly This section explains the order to be followed when removing, installing, disassembling or assembling each component, as well as precautions to be taken for these operations. The specifications contained in this shop manual are subject to change at any time and without any advance notice. Contact your HYUNDAI distributor for the latest information.

0-2 Revised edition mark( ) When a manual is revised, an edition mark is recorded on the bottom outside corner of the pages. Revisions Revised pages are shown at the list of revised pages on the between the contents page and section 1 page. Symbols So that the service manual can be of ample practical use, important places for safety and quality are marked with the following symbols. 2. HOW TO READ THE SERVICE MANUAL Distribution and updating Any additions, amendments or other changes will be sent to HYUNDAI distributors. Get the most up-to-date information before you start any work. Filing method See the page number on the bottom of the page. File the pages in correct order. Following examples shows how to read the page number. Example 1 3 - 3 Section number (3. Power train system) Consecutive page number for each section. Additional pages : Additional pages are indicated by a hyphen(-) and number after the page number. File as in the example. 1. 2. 3. Symbol Item Remarks Special safety precautions are necessary when performing the work. Extra special safety precautions are necessary when performing the work because it is under internal pressure. Special technical precautions or other precautions for preserving standards are necessary when performing the work. Safety Caution 10 - 4 10 - 4 - 1 10 - 4 - 2 10 - 5 Added pages

0-3 3. CONVERSION TABLE Method of using the Conversion Table The Conversion Table in this section is provided to enable simple conversion of figures. For details of the method of using the Conversion Table, see the example given below. Example Method of using the Conversion Table to convert from millimeters to inches Convert 55mm into inches. Locate the number 50 in the vertical column at the left side, take this as , then draw a horizontal line from . Locate the number 5 in the row across the top, take this as , then draw a perpendicular line down from . Take the point where the two lines cross as . This point gives the value when converting from millimeters to inches. Therefore, 55mm = 2.165 inches. Convert 550 mm into inches. The number 550 does not appear in the table, so divide by 10(move the decimal point one place to the left) to convert it to 55mm (Carry out the same procedure as above to convert 55mm to 2.165 inches. The original value (550mm) was divided by 10, so multiply 2.165 inches by 10(move the decimal point one place to the right) to return to the original value. This gives 550mm = 21.65 inches. 1. 2. (1) (2) (3) (1) (2) (3) Millimeters to inches 1mm = 0.03937 in 0 1 2 3 4 5 6 7 8 9 0 0.039 0.079 0.118 0.157 0.197 0.236 0.276 0.315 0.354 10 0.394 0.433 0.472 0.512 0.551 0.591 0.630 0.669 0.709 0.748 20 0.787 0.827 0.866 0.906 0.945 0.984 1.024 1.063 1.102 1.142 30 1.181 1.220 1.260 1.299 1.339 1.378 1.417 1.457 1.496 1.536 40 1.575 1.614 1.654 1.693 1.732 1.772 1.811 1.850 1.890 1.929 50 1.969 2.008 2.047 2.087 2.126 2.165 2.205 2.244 2.283 2.323 60 2.362 2.402 2.441 2.480 2.520 2.559 2.598 2.638 2.677 2.717 70 2.756 2.795 2.835 2.874 2.913 2.953 2.992 3.032 3.071 3.110 80 3.150 3.189 3.228 3.268 3.307 3.346 3.386 3.425 3.465 3.504 90 3.543 3.583 3.622 3.661 3.701 3.740 3.780 3.819 3.858 3.898

0-4 Millimeters to inches 1mm = 0.03937 in 0 1 2 3 4 5 6 7 8 9 0 0.039 0.079 0.118 0.157 0.197 0.236 0.276 0.315 0.354 10 0.394 0.433 0.472 0.512 0.551 0.591 0.630 0.669 0.709 0.748 20 0.787 0.827 0.866 0.906 0.945 0.984 1.024 1.063 1.102 1.142 30 1.181 1.220 1.260 1.299 1.339 1.378 1.417 1.457 1.496 1.536 40 1.575 1.614 1.654 1.693 1.732 1.772 1.811 1.850 1.890 1.929 50 1.969 2.008 2.047 2.087 2.126 2.165 2.205 2.244 2.283 2.323 60 2.362 2.402 2.441 2.480 2.520 2.559 2.598 2.638 2.677 2.717 70 2.756 2.795 2.835 2.874 2.913 2.953 2.992 3.032 3.071 3.110 80 3.150 3.189 3.228 3.268 3.307 3.346 3.386 3.425 3.465 3.504 90 3.543 3.583 3.622 3.661 3.701 3.740 3.780 3.819 3.858 3.898 Kilogram to Pound 1kg = 2.2046lb 0 1 2 3 4 5 6 7 8 9 0 2.20 4.41 6.61 8.82 11.02 13.23 15.43 17.64 19.84 10 22.05 24.25 26.46 28.66 30.86 33.07 35.27 37.48 39.68 41.89 20 44.09 46.30 48.50 50.71 51.91 55.12 57.32 59.5. 61.73 63.93 30 66.14 68.34 70.55 72.75 74.96 77.16 79.37 81.57 83.78 85.98 40 88.18 90.39 92.59 94.80 97.00 99.21 101.41 103.62 105.82 108.03 50 110.23 112.44 114.64 116.85 119.05 121.25 123.46 125.66 127.87 130.07 60 132.28 134.48 136.69 138.89 141.10 143.30 145.51 147.71 149.91 152.12 70 154.32 156.53 158.73 160.94 163.14 165.35 167.55 169.76 171.96 174.17 80 176.37 178.57 180.78 182.98 185.19 187.39 189.60 191.80 194.01 196.21 90 198.42 200.62 202.83 205.03 207.24 209.44 211.64 213.85 216.05 218.26

0-5 Liter to U.S. Gallon 1 = 0.2642 U.S.Gal 0 1 2 3 4 5 6 7 8 9 0 0.264 0.528 0.793 1.057 1.321 1.585 1.849 2.113 2.378 10 2.642 2.906 3.170 3.434 3.698 3.963 4.227 4.491 4.755 5.019 20 5.283 5.548 5.812 6.6076 6.340 6.604 6.869 7.133 7.397 7.661 30 7.925 8.189 8.454 8.718 8.982 9.246 9.510 9.774 10.039 10.303 40 10.567 10.831 11.095 11.359 11.624 11.888 12.152 12.416 12.680 12.944 50 13.209 13.473 13.737 14.001 14.265 14.529 14.795 15.058 15.322 15.586 60 15.850 16.115 16.379 16.643 16.907 17.171 17.435 17.700 17.964 18.228 70 18.492 18.756 19.020 19.285 19.549 19.813 20.077 20.341 20.605 20.870 80 21.134 21.398 21.662 21.926 22.190 22.455 22.719 22.983 23.247 23.511 90 23.775 24.040 24.304 24.568 24.832 25.096 25.631 25.625 25.889 26.153 Liter to U.K. Gallon 1 = 0.21997 U.K.Gal 0 1 2 3 4 5 6 7 8 9 0 0.220 0.440 0.660 0.880 1.100 1.320 1.540 1.760 1.980 10 2.200 2.420 2.640 2.860 3.080 3.300 3.520 3.740 3.950 4.179 20 4.399 4.619 4.839 5.059 5.279 5.499 5.719 5.939 6.159 6.379 30 6.599 6.819 7.039 7.259 7.479 7.969 7.919 8.139 8.359 8.579 40 8.799 9.019 9.239 9.459 9.679 9.899 10.119 10.339 10.559 10.778 50 10.998 11.281 11.438 11.658 11.878 12.098 12.318 12.528 12.758 12.978 60 13.198 13.418 13.638 13.858 14.078 14.298 14.518 14.738 14.958 15.178 70 15.398 15.618 15.838 16.058 16.278 16.498 16.718 16.938 17.158 17.378 80 17.598 17.818 18.037 18.257 18.477 18.697 18.917 19.137 19.357 19.577 90 19.797 20.017 20.237 20.457 20.677 20.897 21.117 21.337 21.557 21.777

0-6 kgm to lb ft 1kg m = 7.233lb ft 0 1 2 3 4 5 6 7 8 9 7.2 14.5 21.7 28.9 36.2 43.4 50.6 57.9 65.1 10 72.3 79.6 86.8 94.0 101.3 108.5 115.7 123.0 130.2 137.4 20 144.7 151.9 159.1 166.4 173.6 180.8 188.1 195.3 202.5 209.8 30 217.0 224.2 231.5 238.7 245.9 253.2 260.4 267.6 274.9 282.1 40 289.3 396.6 303.8 311.0 318.3 325.5 332.7 340.0 347.2 354.4 50 361.7 368.9 376.1 383.4 390.6 397.8 405.1 412.3 419.5 426.8 60 434.0 441.2 448.5 455.7 462.9 470.2 477.4 484.6 491.8 499.1 70 506.3 513.5 520.8 528.0 535.2 542.5 549.7 556.9 564.2 571.4 80 578.6 585.9 593.1 600.3 607.6 614.8 622.0 629.3 636.5 643.7 90 651.0 658.2 665.4 672.7 679.9 687.1 694.4 701.6 708.8 716.1 100 723.3 730.5 737.8 745.0 752.2 759.5 766.7 773.9 781.2 788.4 110 795.6 802.9 810.1 817.3 824.6 831.8 839.0 846.3 853.5 860.7 120 868.0 875.2 882.4 889.7 896.9 904.1 911.4 918.6 925.8 933.1 130 940.3 947.5 954.8 962.0 969.2 976.5 983.7 990.9 998.2 10005.4 140 1012.6 1019.9 1027.1 1034.3 1041.5 1048.8 1056.0 1063.2 1070.5 1077.7 150 1084.9 1092.2 1099.4 1106.6 1113.9 1121.1 1128.3 1135.6 1142.8 1150.0 160 1157.3 1164.5 1171.7 1179.0 1186.2 1193.4 1200.7 1207.9 1215.1 1222.4 170 1129.6 1236.8 1244.1 1251.3 1258.5 1265.8 1273.0 1280.1 1287.5 1294.7 180 1301.9 1309.2 1316.4 1323.6 1330.9 1338.1 1345.3 1352.6 1359.8 1367.0 190 1374.3 1381.5 1388.7 1396.0 1403.2 1410.4 1417.7 1424.9 1432.1 1439.4

0-7 kg/cm 2 to lb/in 2 1kg/cm 2 = 14.2233lb/in 2 0 1 2 3 4 5 6 7 8 9 14.2 28.4 42.7 56.9 71.1 85.3 99.6 113.8 128.0 10 142.2 156.5 170.7 184.9 199.1 213.4 227.6 241.8 256.0 270.2 20 284.5 298.7 312.9 327.1 341.4 355.6 369.8 384.0 398.3 412.5 30 426.7 440.9 455.1 469.4 483.6 497.8 512.0 526.3 540.5 554.7 40 568.9 583.2 597.4 611.6 625.8 640.1 654.3 668.5 682.7 696.9 50 711.2 725.4 739.6 753.8 768.1 782.3 796.5 810.7 825.0 839.2 60 853.4 867.6 881.8 896.1 910.3 924.5 938.7 953.0 967.2 981.4 70 995.6 1010 1024 1038 1053 1067 1081 1095 1109 1124 80 1138 1152 1166 1181 1195 1209 1223 1237 1252 1266 90 1280 1294 1309 1323 1337 1351 1365 1380 1394 1408 100 1422 1437 1451 1465 1479 1493 1508 1522 1536 1550 110 1565 1579 1593 1607 1621 1636 1650 1664 1678 1693 120 1707 1721 1735 1749 1764 1778 1792 1806 1821 1835 130 1849 2863 1877 1892 1906 1920 1934 1949 1963 1977 140 1991 2005 2020 2034 2048 2062 2077 2091 2105 2119 150 2134 2148 2162 2176 2190 2205 2219 2233 2247 2262 160 2276 2290 2304 2318 2333 2347 2361 2375 2389 2404 170 2418 2432 2446 2460 2475 2489 2503 2518 2532 2546 180 2560 2574 2589 5603 2617 2631 2646 2660 2674 2688 200 2845 2859 2873 2887 2901 2916 2930 2944 2958 2973 210 2987 3001 3015 3030 3044 3058 3072 3086 3101 3115 220 3129 3143 3158 3172 3186 3200 3214 3229 3243 3257 230 3271 3286 3300 3314 3328 3343 3357 3371 3385 3399 240 3414 3428 3442 3456 3470 3485 3499 3513 3527 3542

TEMPERATURE Fahrenheit-Centigrade Conversion. A simple way to convert a fahrenheit temperature reading into a centigrade temperature reading or vice verse is to enter the accompanying table in the center or boldface column of figures. These figures refer to the temperature in either Fahrenheit or Centigrade degrees. If it is desired to convert from Fahrenheit to Centigrade degrees, consider the center column as a table of Fahrenheit temperatures and read the corresponding Centigrade temperature in the column at the left. If it is desired to convert from Centigrade to Fahrenheit degrees, consider the center column as a table of Centigrade values, and read the corresponding Fahrenheit temperature on the right. 0-8 C F C F C F C F -40.4 -40 -40.0 -11.7 11 51.8 7.8 46 114.8 27.2 81 117.8 -37.2 -35 -31.0 -11.1 12 53.6 8.3 47 116.6 27.8 82 179.6 -34.4 -30 -22.0 -10.6 13 55.4 8.9 48 118.4 28.3 83 181.4 -31.7 -25 -13.0 -10.0 14 57.2 9.4 49 120.2 28.9 84 183.2 -28.9 -20 -4.0 -9.4 15 59.0 10.0 50 122.0 29.4 85 185.0 -28.3 -19 -2.2 -8.9 16 60.8 10.6 51 123.8 30.0 86 186.8 -27.8 -18 -0.4 -8.3 17 62.6 11.1 52 125.6 30.6 87 188.6 -27.2 -17 1.4 -7.8 18 64.4 11.7 53 127.4 31.1 88 190.4 -26.7 -16 3.2 -6.7 20 68.0 12.8 55 131.0 32.2 90 194.0 -26.1 -15 5.0 -6.7 20 68.0 12.8 55 131.0 32.2 90 194.0 -25.6 -14 6.8 -6.1 21 69.8 13.3 56 132.8 32.8 91 195.8 -25.0 -13 8.6 -5.6 22 71.6 13.9 57 134.6 33.3 92 197.6 -24.4 -12 10.4 -5.0 23 73.4 14.4 58 136.4 33.9 93 199.4 -23.9 -11 12.2 -4.4 24 75.2 15.0 59 138.2 34.4 94 201.2 -23.3 -10 14.0 -3.9 25 77.0 15.6 60 140.0 35.0 95 203.0 -22.8 -9 15.8 -3.3 26 78.8 16.1 61 141.8 35.6 96 204.8 -22.2 -8 17.6 -2.8 27 80.6 16.7 62 143.6 36.1 97 206.6 -21.7 -7 19.4 -2.2 28 82.4 17.2 63 145.4 36.7 98 208.4 -21.1 -6 21.2 -1.7 29 84.2 17.8 64 147.2 37.2 99 210.2 -20.6 -5 23.0 -1.1 35 95.0 21.1 70 158.0 51.7 125 257.0 -20.0 -4 24.8 -0.6 31 87.8 18.9 66 150.8 40.6 105 221.0 -19.4 -3 26.6 0 32 89.6 19.4 67 152.6 43.3 110 230.0 -18.9 -2 28.4 0.6 33 91.4 20.0 68 154.4 46.1 115 239.0 -18.3 -1 30.2 1.1 34 93.2 20.6 69 156.2 48.9 120 248.0 -17.8 0 32.0 1.7 35 95.0 21.1 70 158.0 51.7 125 257.0 -17.2 1 33.8 2.2 36 96.8 21.7 71 159.8 54.4 130 266.0 -16.7 2 35.6 2.8 37 98.6 22.2 72 161.6 57.2 135 275.0 -16.1 3 37.4 3.3 38 100.4 22.8 73 163.4 60.0 140 284.0 -15.6 4 39.2 3.9 39 102.2 23.3 74 165.2 62.7 145 293.0 -15.0 5 41.0 4.4 40 104.0 23.9 75 167.0 65.6 150 302.0 -14.4 6 42.8 5.0 41 105.8 24.4 76 168.8 68.3 155 311.0 -13.9 7 44.6 5.6 42 107.6 25.0 77 170.6 71.1 160 320.0 -13.3 8 46.4 6.1 43 109.4 25.6 78 172.4 73.9 165 329.0 -12.8 9 48.2 6.7 44 111.2 26.1 79 174.2 76.7 170 338.0 -12.2 10 50.0 7.2 45 113.0 26.7 80 176.0 79.4 172 347.0

SECTION 1 GENERAL FOLLOW SAFE PROCEDURE Unsafe work practices are dangerous. Understand service procedure before doing work; do not attempt shortcuts. WEAR PROTECTIVE CLOTHING Wear close fitting clothing and safety equipment appropriate to the job. WARN OTHERS OF SERVICE WORK Unexpected machine movement can cause serious injury. Before performing any work on the wheel loader, attach a Do Not Operate tag on the right side controller lever. USE HANDHOLDS AND STEPS Falling is one of the major causes of personal injury. When you get on and off the machine, always maintain a three point contact with the steps and handrails and face the machine. Do not use any controls as handholds. Never jump on or off the machine. Never mount or dismount a moving machine. Be careful of slippery conditions on platforms, steps, and handrails when leaving the machine. WARN DO NOT OPERATE 1-1 GROUP 1 SAFETY HINTS

PREPARE FOR EMERGENCIES Be prepared if a fire starts. Keep a first aid kit and fire extinguisher handy. Keep emergency numbers for doctors, ambulance service, hospital, and fire department near your telephone. PROTECT AGAINST FLYING DEBRIS Guard against injury from flying pieces of metal or debris; wear goggles or safety glasses. PROTECT AGAINST NOISE Prolonged exposure to loud noise can cause impairment or loss of hearing. Wear a suitable hearing protective device such as earmuffs or earplugs to protect against objectionable or uncomfortable loud noises. 1-2 WORK IN CLEAN AREA Before starting a job : Clean work area and machine. Make sure you have all necessary tools to do your job. Have the right parts on hand. Read all instructions thoroughly; do not attempt shortcuts.

Hyundai HL770 Wheel Loader Service & Repair Manual

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