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318
Revision A
7.1.7
O-Ring Face Seal Hydraulic Fittings
1001376
Figure 7.14: Hydraulic Fitting
1.
Check components to ensure that sealing surfaces and
fitting threads are free of burrs, nicks, scratches, or any
foreign material.
1001377
A
B
C
D
E
Figure 7.15: Hydraulic Fitting
2.
Apply hydraulic system oil to O-ring (B).
3.
Align tube or hose assembly so that flat face of sleeve (A)
or (C) comes in full contact with O-ring (B).
4.
Thread tube or hose nut (D) until hand-tight. The nut
should turn freely until it is bottomed out.
5.
Torque fittings according to values in Table
NOTE:
If applicable, hold hex on fitting body (E) to prevent
rotation of fitting body and hose when tightening fitting
nut (D).
6.
Use three wrenches when assembling unions or joining two
hoses together.
7.
Check final condition of fitting.
Table 7.13 O-Ring Face Seal (ORFS) Hydraulic Fittings
SAE Dash Size
Thread Size (in.)
Tube O.D. (in.)
Torque Value
17
Nm
lbf·ft
-3
Note
18
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
–
–
17.
Torque values and angles shown are based on lubricated connection as in reassembly.
18.
O-ring face seal type end not defined for this tube size.
