214603 458 Revision A
O-Ring Face Seal (ORFS) Hydraulic Fittings
Figure 8.14: Hydraulic Fitting
1. Check components to ensure that sealing surfaces and
fitting threads are free of burrs, nicks, scratches, or any
foreign material.
Figure 8.15: 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 8.13, page
458.
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 8.13 O-Ring Face Seal (ORFS) Hydraulic Fittings
SAE Dash Size Thread Size (in.) Tube O.D. (in.)
Torque Value
47
Nm
lbf·ft
-3 Note
48
3/16
––
-4
9/16 1/4
25–28 18–21
-5
Note
48
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
47. Torque values and angles shown are based on lubricated connection as in reassembly.
48. O-ring face seal type end not defined for this tube size.
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