Komatsu PC88MR-10 Shop Manual page 52

00 Index and foreword
Foreword, safety and general information
Unless otherwise specified, tighten the unified fine threaded bolts and nuts to the torque shown in the table
below.
Type of bolt
Nominal No. -
threads per inch,
type of thread
1 / -28UNF
4
5 / -24UNF
16
3 / -24UNF
8
7 / -20UNF
16
1 / -20UNF
2
9 / -18UNF
16
5 / -18UNF
8
3 / -16UNF
4
7 / -14UNF
8
1,020 to 1,373 {104 to 140}
1-14UNF
1,353 to 1,844 {138 to 188}
1 1 / -12UNF
8
1,804 to 2,432 {184 to 248}
1 1 / -12UNF
4
2,707 to 3,658 {276 to 373}
1 1 / -12UNF
2
Table of tightening torque for O-ring boss piping joints
a Unless otherwise specified, tighten the pipe joint for O-ring boss to the torque shown in the table below.
Thread
diameter
Nominal No.
(mm)
02 14
18
03, 04
20
05, 06
24
00-50
A
Tightening torque (Nm {kgm})
Range
14.7 to 19.6 {1.5 to 2}
34.3 to 39.2 {3.5 to 4}
53.9 to 68.6 {5.5 to 7}
83.4 to 108 {8.5 to 11}
127 to 167 {13 to 17}
186 to 245 {19 to 25}
255 to 343 {26 to 35}
441 to 598 {45 to 61}
716 to 961 {73 to 98}
Width
across flats
(mm)
35 to 63 {3.5 to 6.5}
Varies
59 to 98 {6.0 to 10.0}
depending
on type of 84 to 132 {8.5 to 13.5}
connector.
128 to 186 {13.0 to 19.0}
Tightening torque (Nm {kgm})
Target
17.7 {1.8} 3.9 to 4.9 {0.4 to 0.5}
37.3 {3.8} 7.8 to 9.8 {0.8 to 1}
61.8 {6.3} 14.7 to 19.6 {1.5 to 2}
96.1 {9.8} 24.5 to 29.4 {2.5 to 3}
147 {15} 34.3 to 49.0 {3.5 to 5}
216 {22} 49.0 to 68.6 {5 to 7}
294 {30} 73.5 to 98.1 {7.5 to 10}
520 {53} 127 to 167 {13 to 17}
843 {86} 196 to 265 {20 to 27}
1,196 {122} 284 to 382 {29 to 39}
1,598 {163} 382 to 520 {39 to 53}
2,118 {216} 510 to 686 {52 to 70}
3,177 {324} 765 to 1,030 {78 to 105}
Tightening torque (Nm {kgm})
Range
B
Range Target
4.41 {0.45}
8.8 {0.9}
16.7 {1.7}
26.5 {2.7}
41.2 {4.2}
58.6 {6}
83.4 {8.5}
147 {15}
226 {23}
333 {34}
451 {46}
598 {61}
892 {91}
Target
44 {4.5}
78 {8.0}
103 {10.5}
157 {16.0}
PC88MR-10