Komatsu A63001, Shop Manual

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FOREWORD STANDARD TIGHTENING TORQUE
00-12
2
WB156-5
12
STANDARD TIGHTENING TORQUE
00
STANDARD TIGHTENING TORQUE OF BOLTS AND NUTS
00
The following charts give the standard tightening torques of bolts and nuts. Exceptions are given in DISASSEMBLY AND
ASSEMBLY.
Thread diameter of bolt Width across flats
mm mm N·m lbf ft
6 10 13.2 ±1.4 9.7 ±1.0
8 13 31.4 ±2.9 23.2 ±2.1
10 17 65.7 ±6.8 48.5 ±5.0
12 19 112 ±9.8 82.6 ±7.2
14 22 177 ±19 130.5 ±14.0
16 24 279 ±29 205.8 ±23.4
18 27 383 ±39 282.5 ±28.8
20 30 549 ±58 404.9 ±42.8
22 32 745 ±78 549.5 ±57.5
24 36 927 ±98 683.7 ±72.3
27 41 1320 ±140 973.6 ±103.2
30 46 1720 ±190 1268.6 ±140.1
33 50 2210 ±240 1630.0 ±177.0
36 55 2750 ±290 2028.3 ±213.9
39 60 3280 ±340 2419.2 ±250.8
Thread diameter of bolt Width across flats
mm mm N·m lbf ft
6 10 7.85 ±1.95 5.75 ±1.4
8 13 18.6 ±4.9 13.7 ±3.6
10 14 40.2 ±5.9 29.6 ±4.4
12 27 82.35 ±7.85 60.7 ±5.8