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154
Revision A
Figure 6.9: Hydraulic Fitting
1.
Check the components to ensure that the sealing surfaces
and the fitting threads are free of burrs, nicks, scratches,
and any foreign material.
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Figure 6.10: Hydraulic Fitting
2.
Apply hydraulic system oil to O-ring (B).
3.
Align the tube or hose assembly so that the flat face of
sleeve (A) or (C) comes in full contact with O-ring (B).
4.
Thread tube or hose nut (D) until it is hand-tight. The nut
should turn freely until it bottoms out.
5.
Torque the fittings according to values in Table
NOTE:
If applicable, hold the hex flange on fitting body (E) to
prevent the rotation of the fitting body and the hose when
tightening fitting nut (D).
6.
Use three wrenches when assembling unions or joining two
hoses together.
7.
Check the final condition of the fitting.
Table 6.10 O-Ring Face Seal (ORFS) Hydraulic Fittings
SAE Dash Size
Thread Size (in.)
Tube O.D. (in.)
Torque Value
10
Nm
lbf·ft
-3
Note
11
3/16
–
–
-4
9/16
1/4
25
–
28
18
–
21
-5
5/16
–
–
-6
11/16
3/8
40
–
44
29
–
32
-8
13/16
1/2
55
–
61
41
–
45
-10
1
5/8
80
–
88
59
–
65
-12
1 3/16
3/4
115
–
127
85
–
94
-14
7/8
–
–
-16
1 7/16
1
150
–
165
111
–
122
-20
1 11/16
1 1/4
205
–
226
151
–
167
10.
Torque values and angles shown are based on lubricated connection as in reassembly.
11.
O-ring face seal type end not defined for this tube size.
