215184 513 Revision A
12.2.6 O-Ring Face Seal Hydraulic Fittings
Figure 12.17: Hydraulic Fitting
1. Check components to ensure that sealing surfaces and
fitting threads are free of burrs, nicks, scratches, or any
foreign material.
Figure 12.18: 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 12.10, page
513.
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 12.10 O-Ring Face Seal (ORFS) Hydraulic Fittings
SAE Dash Size
Thread Size (in.) Tube O.D. (in.)
Torque Value
9
Nm
lbf·ft
-3 Note
10
3/16
––
-4
9/16 1/4
25–28 18–21
-5 Note
10
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
REFERENCE
9. Torque values and angles shown are based on lubricated connection as in reassembly.
10. O-ring face seal type end not defined for this tube size.
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