Komatsu D155A-6 Assembly Instruction Manual page 20

3. Tightening torque for hydraulic hose connecting nut
For the connecting nuts installed to the hydraulic hose adapters in relatively low pressure systems, apply
tightening torque in Table 4.
Outside diameter
of hose
(mm)
Approx. 6
Approx. 10
Approx. 13
Approx. 16
Approx. 20
Note : When connecting hoses, take care not to twist them.
Width across
flatse.
(mm)
19
22
24
27
32
36
Table 4
Tightening torque
Range
35 – 63 {3.5 – 6.5}
54 – 93 {5.5 – 9.5}
59 – 98 {6.0 – 10.0}
84 – 132 {8.5 – 13.5}
128 – 186 {13.0 – 19.0}
177 – 245 {18.0 – 25.0}
15
Tightening torque
Unit: Nm {kgm}
Target
44 {4.5}
74 {7.5}
78 {8.0}
103 {10.5}
157 {16.0}
216 {22.0}