HYDRAULICS
8C-7
Table 8C-2: Replacement o-rings for o-ring Boss
Fittings
NOTE:
O-rings should be lubricated with the fluid to be
used in the system prior to assembly, see
Figure 8C-2.
Figure 8C-2. Boss Fitting O-ring Installation
Table 8C-3: O-ring Boss Torque Recommendations
ORS (FACE SEAL) FITTINGS
Face seal fittings have o-ring grooves machined into
the flat male face. This o-ring and flat surface mate
against the mating fittings machine face.
The swivel nut can be retracted to inspect the o-ring
and fitting face without removal of tubes or compo-
nents, see Figure 8C-3.
Figure 8C-3. ORS (Face Seal) Fitting
ABC
Tubing O.D.
or Hose I.D.
Thread Size
Jacobsen
Part No.
1/8 5/16-24 459290
3/16 3/8-24 459291
1/4 7/16 339896
5/16 1/2-20 459293
1/2 3/4-16 339898
5/8 7/8-14 339899
3/4 1 1/16-12 339900
7/8 1 3/16-12 459296
1 1 5/18-12 339901
1 1/4 1 5/8-12 339902
1 1/2 1 7/8-12 339903
2 2 1/2-12 459300
B
A
SAE Dash
Size
Thread
Size
Tube O.D.
Torque
In-lbs
3 3/8-24 0.188 96-120
4 7/16-20 0.250 168-192
5 1/2-20 0.312 216-240
6 9/16-18 0.375 288-312
8 3/4-16 0.500 600-720
10 7/8-14 0.625 864-960
12 1 1/16-12 0.750 1500-1620
14 1 3/8-12 0.875 1920-2160
16 1 5/16-12 1.000 2400-2640
20 1 5/8-12 1.250 2520-3360
24 1 7/8-12 1.500 3240-4320
Flat Face
O-Ring
O-Ring
Groove
Metal Seal
Backup
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