MAINTENANCE 21.2 TORQUE LIST Unless otherwise specified, tighten the metric bolts and nuts to the torque shown in the table. The tightening torque is determined by the width across the flats (b)of the nut and bolt. If it is necessary to replace any nut or bolt, always use a genuine Komatsu part of the same size as the part that was replaced. N NOTE: Use caution and proceed slowly when tightening panels or other parts having tightening fixtures made of plastic, as excessive tightening torque will damage the plastic parts.
3-21 WA320-3MC Thread diameter of bolt (mm) (a) Width across flat (mm) (b) N lbft 6 8 10 12 14 10 13 17 19 22 13.2 ± 1.4 31.4 ± 2.9 65.7 ± 6.8 112 ± 9.8 177 ± 19 97.3 ± 1.03 23.2 ± 2.1 48.5 ± 5.0 82.6 ± 7.2 131 ± 14 16 18 20 22 24 24 27 30 32 36 279 ± 29 383 ± 39 549 ± 58 745 ± 78 927 ± 98 206 ± 21 282 ± 29 405 ± 43 549 ± 58 684 ± 72 27 30 33 36 39 41 46 50 55 60 1320 ± 140 1720 ± 190 2210 ± 240 2750 ± 290 3280 ± 340 973 ± 100 1270 ± 140 1630 ± 180 2030 ± 210 2420 ± 250