Komatsu PC500LC-10R, Shop Manual, Page: 66 / 758

Type of bolt A B
Nominal size -
threads per inch
Tightening torque ( Nm { kgm} ) Tightening torque ( Nm { kgm} )
Range Target Range Target
1-8UNC 883 to 1196 {90 to 122} 1040 {106} 245 to 333 {25 to 34} 284 {29}
1
1
/
8
-7UNC 1187 to 1608 {121 to 164} 1393 {142} 333 to 451 {34 to 46} 392 {40}
1
1
/
4
-7UNC 1598 to 2157 {163 to 220} 1873 {191} 451 to 608 {46 to 62} 530 {54}
1
1
/
2
-6UNC 2354 to 3177 {240 to 324} 2765 {282} 657 to 892 {67 to 91} 775 {79}
REMARK
Tighten the unified fine threaded bolts and nuts to the torque shown in the table below unless otherwise speci-
fied.
Type of bolt A B
Nominal size -
threads per inch
Tightening torque ( Nm { kgm} ) Tightening torque ( Nm { kgm} )
Range Target Range Target
1
/
4
-28UNF 14.7 to 19.6 {1.5 to 2} 17.7 {1.8} 3.9 to 4.9 {0.4 to 0.5} 4.41 {0.45}
5
/
16
-24UNF 34.3 to 39.2 {3.5 to 4} 34.3 {3.5} 7.8 to 9.8 {0.8 to 1} 8.8 {0.9}
3
/
8
-24UNF 53.9 to 68.6 {5.5 to 7} 61.8 {6.3} 14.7 to 19.6 {1.5 to 2} 16.7 {1.7}
7
/
16
-20UNF 83.4 to 108 {8.5 to 11} 96.1 {9.8} 24.5 to 29.4 {2.5 to 3} 26.5 {2.7}
1
/
2
-20UNF 127 to 167 {13 to 17} 147 {15} 34.3 to 49.0 {3.5 to 5} 41.2 {4.2}
9
/
16
-18UNF
186 to 245 {19 to 25} 216 {22} 49.0 to 68.6 {5 to 7} 58.8 {6}
5
/
8
-18UNF 255 to 343 {26 to 35} 294 {30} 73.5 to 98.1 {7.5 to 10} 83.4 {8.5}
3
/
4
-16UNF
441 to 598 {45 to 61} 520 {53} 127 to 167 {13 to 17} 147 {15}
7
/
8
-14UNF 716 to 961 {73 to 98} 843 {86} 196 to 265 {20 to 27} 226 {23}
1-14UNF 1020 to 1373 {104 to 140} 1196 {122} 284 to 382 {29 to 39} 333 {34}
1
1
/
8
-12UNF 1353 to 1844 {138 to 188} 1598 {163} 382 to 520 {39 to 53} 451 {46}
1
1
/
4
-12UNF
1804 to 2432 {184 to 248} 2118 {216} 510 to 686 {52 to 70} 598 {61}
1
1
/
2
-12UNF 2707 to 3658 {276 to 373} 3177 {324} 765 to 1030 {78 to 105} 892 {91}
STANDARD TIGHTENING TORQUE TABLE 00 INDEX AND FOREWORD
00-64 PC500LC-10R