GROUP 2 TIGHTENING TORQUE
1. MAJOR COMPONENTS
Torque
No. Descriptions Bolt size
kgf·m lbf·ft
1 Engine mounting bolt, nut M24 × 3.0 88.2±8.8 638±63.7
2 Radiator mounting bolt M20 × 2.5 57.9±8.7 419±62.9
Engine
3 Coupling mounting socket bolt M24 × 3.0 89.2±2.5 645±18.1
4 Main pump housing mounting bolt M 8 × 1.25 13.4±1.3 97±9.4
5 Main pump mounting bolt M24 × 3.0 80±8.0 579±57.9
6 Main control valve mounting nut M20 × 2.5 45±4.5 326±32.5
Hydraulic
7 Fuel tank mounting bolt M20 × 2.5 58±6.0 420±43.4
system
8 Hydraulic oil tank mounting bolt M20 × 2.5 58±6.0 420±43.4
9 Turning joint mounting bolt, nut M16 × 2.0 29.7±4.5 215±32.5
10 Swing motor mounting bolt M24 × 3.0 100±15 723±109
11 Swing bearing upper part mounting bolt M30 × 3.0 175±20 1266±145
Power
12 train Swing bearing lower part mounting bolt M30 × 3.0 175±20 1266±145
system
13 Travel motor mounting bolt M30 × 3.0 100±8.0 723±57.9
14 Sprocket mounting bolt M30 × 3.5 200±15 1447±109
15 Carrier roller mounting bolt, nut M20 × 2.5 57.9±8.7 419±62.9
16 Track roller mounting bolt M27 × 3.0 135±15 977±109
Under
17 Track tension body mounting bolt M20 × 2.5 57.9±6.0 419±43.4
carriage
18 Track shoe mounting bolt, nut 1 1/8"-12UNF 196.2±15.9 1419±115
18 Track guard mounting bolt M27 × 3.0 135±15 977±109
19 Counter weight mounting bolt M42 × 3.0 390±40 2821±289
20 Center frame support & lower track mounting bolt M36 × 3.0 280±30 2025±217
Others
21 Cab mounting bolt M12 × 1.75 12.8±3.0 92.6±21.7
22 Operator's seat mounting bolt M 8 × 1.25 4.05±0.8 29.3±5.8
※ For tightening torque of engine and hydraulic components, see each component disassembly and
assembly.
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2. TORQUE CHART
Use following table for unspecified torque.
1) BOLT AND NUT - Coarse thread
8T 10T
Bolt size
kg·m lb·ft kg·m lb·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
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
M18×2.5 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
kg·m lb·ft kg·m lb·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 (FLARE type)
Thread size (PF) Width across flat (mm) kgf·m lbf·ft
1/4" 19 4 28.9
3/8" 22 5 36.2
1/2" 27 9.5 68.7
3/4" 36 18 130
1" 41 21 152
1-1/4" 50 35 253
3) PIPE AND HOSE (ORFS type)
Thread size (UNF) Width across flat (mm) kgf·m lbf·ft
9/16-18 19 4 28.9
11/16-16 22 5 36.2
13/16-16 27 9.5 68.7
1-3/16-12 36 18 130
1-7/16-12 41 21 152
1-11/16-12 50 35 253
4) 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 9.5 68.7
3/4" 36 18 130
1" 41 21 152
1-1/4" 50 35 253
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