Komatsu 170-3 Series, Shop Manual, Page: 16 / 454

FOREWORD STANDARD TIGHTENING TORQUE
00-14
TIGHTENING TORQUE FOR 102 AND 114 ENGINE SERIES
1) BOLT AND NUTS
Use these torques for bolts and nuts (unit: mm) of Cummins Engine.
2) EYE JOINTS
Use these torques for eye joints (unit: mm) of Cummins Engine.
3) TAPERED SCREWS
Use these torques for tapered screws (unit: inch) of Cummins Engine.
TIGHTENING TORQUE TABLE FOR HOSES (TAPER SEAL TYPE AND FACE SEAL TYPE)
!
Tighten the hoses (taper seal type and face seal type) to the following torque, unless otherwise specified.
!
Apply the following torque when the threads are coated (wet) with engine oil.
Thread diameter Tightening torque
mm Nm kgm
6
8
10
12
10 ± 2
24 ± 4
43 ± 6
77 ± 12
1.02 ± 0.20
2.45 ± 0.41
4.38 ± 0.61
7.85 ± 1.22
Thread diameter Tightening torque
mm Nm kgm
6
8
10
12
14
8 ± 2
10 ± 2
12 ± 2
24 ± 4
36 ± 5
0.81 ± 0.20
1.02 ± 0.20
1.22 ± 0.20
2.45 ± 0.41
3.67 ± 0.51
Thread diameter Tightening torque
inch Nm kgm
1 / 16
1 / 8
1 / 4
3 / 8
1 / 2
3 / 4
1
3 ± 1
8 ± 2
12 ± 2
15 ± 2
24 ± 4
36 ± 5
60 ± 9 0.31 ± 0.10
0.81 ± 0.20
1.22 ± 0.20
1.53 ± 0.20
2.45 ± 0.41
3.67 ± 0.51
6.12 ± 0.92
Nominal size
of hose
Width across
flats
Tightening torque (Nm {kgm})
Taper seal
type
Face seal type
Range Target
Thread size
(mm)
Nominal thread
size - Threads per
inch, Thread series
Root diameter
(mm) (Reference)
02 19
34 – 54 {3.5 – 5.5} 44 {4.5} –
– 18UN
14.3
34 – 63 {3.5 – 6.5} 44 {4.5} 14 – –
03
22 54 – 93 {5.5 – 9.5} 74 {7.5} –
– 16UN
17.5
24 59 – 98 {6.0 – 10.0} 78 {8.0} 18 – –
04 27 84 – 132 {8.5 – 13.5} 103 {10.5} 22
– 16UN
20.6
05 32 128 – 186 {13.0 – 19.0} 157 {16.0} 24 1 – 14UNS 25.4
06 36 177 – 245 {18.0 – 25.0} 216 {22.0} 30
1 – 12UN
30.2
(10) 41 177 – 245 {18.0 – 25.0} 216 {22.0} 33 – –
(12) 46 197 – 294 {20.0 – 30.0} 245 {25.0} 36 – –
(14) 55 246 – 343 {25.0 – 35.0} 294 {30.0} 42 – –
9
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16
11
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16
13
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16
3
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16
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