GROUP 2 TIGHTENING TORQUE
1. MAJOR COMPONENTS
Torque
No. Descriptions Bolt size
kgfÂm lbfÂft
1 Engine mounting bolt, nut M20 Ý 2.5 46.4 Ü 4.6 336 Ü 33
2 Radiator mounting bolt M16 Ý 2.0 29.7 Ü 4.5 215 Ü 32.5
Engine
3 Coupling mounting socket bolt M20 Ý 2.5 46 Ü 2.0 333Ü 14.5
4 Main pump housing mounting bolt M10 Ý 1.5 4.8 Ü 0.3 35 Ü 2.2
5 Main pump mounting bolt M20 Ý 2.5 44 Ü 0.6 318 Ü 47.7
6 Main control valve mounting nut M12 Ý 1.75 12.2 Ü 1.3 88.2 Ü 9.4
Hydraulic
7 system Fuel tank mounting bolt M20 Ý 2.5 45 Ü 5.1 325 Ü 36.8
8 Hydraulic oil tank mounting bolt M20 Ý 2.5 45 Ü 5.1 325 Ü 36.8
9 Turning joint mounting bolt, nut M16 Ý 2.5 29.7 Ü 4.5 215 Ü 32.5
10 Swing motor mounting bolt M20 Ý 2.5 58.4 Ü 6.4 422 Ü 46.2
11 Swing bearing upper part mounting bolt M24 Ý 3.0 94.5 Ü 10.5 683 Ü 75.9
Power
12 train Swing bearing lower part mounting bolt M24 Ý 3.0 94.5 Ü 10.5 683 Ü 75.9
system
13 Travel motor mounting bolt M20 Ý 2.5 57.9 Ü 8.7 419 Ü 62.9
14 Sprocket mounting bolt M20 Ý 2.5 57.9 Ü 8.7 419 Ü 62.9
15 Carrier roller mounting bolt, nut M16 Ý 1.5 31.3 Ü 4.7 226 Ü 33.9
16 Track roller mounting bolt M22 Ý 2.5 81.9 Ü 16.1 592 Ü 116
17 Under Track tension cylinder mounting bolt M22 Ý 1.5 87.2 Ü 12.5 602 Ü 90
carriage
18 Track shoe mounting bolt, nut (R450LC-7A, -#0066) M22 Ý 1.5 105 Ü 5.0 760 Ü 36
19 Track shoe mounting bolt, nut (R450LC-7A, #0067-) M24 Ý 1.5 140 Ü 5.0 1012 Ü 36
20 Track shoe mounting bolt, nut (R500LC-7A, -#0031) M22 Ý 1.5 105 Ü 5.0 760 Ü 36
21 Track shoe mounting bolt, nut (R500LC-7A, #0032-) M24 Ý 1.5 140 Ü 5.0 1012 Ü 36
22 Counter weight mounting bolt M42 Ý 4.5 390 Ü 40 2821 Ü 289
Center frame support & lower track mounting bolt
23 (R500LC-7A) M33 Ý 3.5 220 Ü 20 1591 Ü 145
Others
24 Cab mounting bolt M12 Ý 1.75 12.2 Ü 1.3 88.2 Ü 9.4
25 Operator's seat mounting bolt M 8 Ý 1.25 2.5 Ü 0.5 18.1 Ü 3.6
ö For tightening torque of engine and hydraulic components, see engine maintenance guide and
service manual.
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2. TORQUE CHART
Use following table for unspecified torque.
1) BOLT AND NUT - Coarse thread
8T 10T
Bolt size
kgf·m lbf·ft kgf·m lbf·ft
M 6×1.0 0.85 ~ 1.25 6.15 ~ 9.04 1.14 ~ 1.74 8.2 ~ 12.6
M 8×1.25 2.0 ~ 3.0 14.5 ~ 21.7 2.7 ~ 4.1 19.5 ~ 29.7
M10×1.5 4.0 ~ 6.0 28.9 ~ 43.4 5.5 ~ 8.3 39.8 ~ 60.0
M12×1.75 7.4 ~ 11.2 53.5 ~ 81.0 9.8 ~ 15.8 70.9 ~ 114
M14×2.0 12.2 ~ 16.6 88.2 ~ 120 16.7 ~ 22.5 121 ~ 163
M16×2.0 18.6 ~ 25.2 135 ~ 182 25.2 ~ 34.2 182 ~ 247
M18×2.0 25.8 ~ 35.0 187 ~ 253 35.1 ~ 47.5 254 ~ 344
M20×2.5 36.2 ~ 49.0 262 ~ 354 49.2 ~ 66.6 356 ~ 482
M22×2.5 48.3 ~ 63.3 349 ~ 458 65.8 ~ 98.0 476 ~ 709
M24×3.0 62.5 ~ 84.5 452 ~ 611 85.0 ~ 115 615 ~ 832
M30×3.0 124 ~ 168 898 ~ 1214 169 ~ 229 1223 ~ 1656
M36×4.0 174 ~ 236 1261 ~ 1704 250 ~ 310 1808 ~ 2242
(2) Fine thread
8T 10T
Bolt size
kgf·m lbf·ft kgf·m lbf·ft
M 8×1.0 2.2 ~ 3.4 15.9 ~ 24.6 3.0 ~ 4.4 21.7 ~ 31.8
M10×1.2 4.5 ~ 6.7 32.5 ~ 48.5 5.9 ~ 8.9 42.7 ~ 64.4
M12×1.25 7.8 ~ 11.6 56.4 ~ 83.9 10.6 ~ 16.0 76.7 ~ 116
M14×1.5 13.3 ~ 18.1 96.2 ~ 131 17.9 ~ 24.1 130 ~ 174
M16×1.5 19.9 ~ 26.9 144 ~ 195 26.6 ~ 36.0 192 ~ 260
M18×1.5 28.6 ~ 43.6 207 ~ 315 38.4 ~ 52.0 278 ~ 376
M20×1.5 40.0 ~ 54.0 289 ~ 391 53.4 ~ 72.2 386 ~ 522
M22×1.5 52.7 ~ 71.3 381 ~ 516 70.7 ~ 95.7 511 ~ 692
M24×2.0 67.9 ~ 91.9 491 ~ 665 90.9 ~ 123 658 ~ 890
M30×2.0 137 ~ 185 990 ~ 1339 182 ~ 248 1314 ~ 1796
M36×3.0 192 ~ 260 1390 ~ 1880 262 ~ 354 1894 ~ 2562
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2) PIPE AND HOSE
Thread size Width across flat(mm) kgf·m lbf·ft
1/4" 19 3 21.7
3/8" 22 4 28.9
1/2" 27 5 36.2
3/4" 36 12 86.8
1" 41 14 101
3) FITTING
Thread size Width across flat(mm) kgf·m lbf·ft
1/4" 19 4 28.9
3/8" 22 5 36.2
1/2" 27 6 43.4
3/4" 36 13 94.0
1" 41 15 109
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