O-ring face seal (orfs) hydraulic fittings – MacDon FD75 OM User Manual
Page 268
O-Ring Face Seal (ORFS) Hydraulic Fittings
To tighten O-ring face seal (ORFS) hydraulic fittings, follow these steps:
1.
Check components to ensure that the sealing surfaces
and fitting threads are free of burrs, nicks, and
scratches or any foreign material.
Figure 6.14: Hydraulic Fitting
2.
Apply hydraulic system oil to the O-ring (B).
3.
Align the tube or hose assembly so that the flat face
of the 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 fitting further to the torque value in the table
shown in the opposite column.
NOTE:
If applicable, hold the hex on the fitting body (E)
to prevent rotation of fitting body and hose when
tightening the fitting nut (D).
6.
When assembling unions or two hoses together, three
wrenches will be required.
7.
Check the final condition of the fitting.
Figure 6.15: Hydraulic Fitting
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