Installation Instructions for Hydraulic Hoses and
Fittings
When removing or installing the hydraulic hoses and
fittings with O-ring, it is necessary to operate as per
the torque specified in the following table.
Hose fittings
Thread
Torque Nm
M10×1
15
M12×1.5
25
M14×1.5
35
M16×1.5
50
M18×1.5
70
M22×1.5
125
M27×2
145
M33×2
210
Hoses
Thread
Torque Nm
M12×1.5
15
～
17
M14×1.5
18
～
21
M16×1.5
25
～
28
M18×1.5
35
～
39
M22×1.5
45
～
50
M27×1.5
85
～
94
M30×2
110
～
121
M36×2
130
～
143
Tightening Procedures
1.
Replace the O-ring. It is necessary to replace the
O-ring if the seal has been damaged. The O-ring
shall not be reused if the pipe fitting or the hose
has between tightened.
2.
Lubricate the O-ring before installation.
3.
Ensure to place and fix the O-ring properly.
4.
Align the hose nut to the pipe fitting, and tighten
the nut.
5.
Tighten the nut or the pipe fitting as per the
torque specified in the above table.
6.
Perform all machine functions and inspect hoses,
hose fittings and relevant components to confirm
that no leakage occurs.
3
GTJZ0407SE
Maintenance Manual
