215916 504 Revision A
8.1.3 O-Ring Boss Hydraulic Fittings – Adjustable
The standard torque values are provided for adjustable hydraulic fittings. If a procedure specifies a different torque value
for the same type and size of fitting found in this topic, use the value specified in the procedure instead.
Figure 8.6: Hydraulic Fitting
1. Inspect O-ring (A) and seat (B) for dirt or obvious defects.
2. Back off lock nut (C) as far as possible. Ensure that
washer (D) is loose and is pushed toward lock nut (C) as far
as possible.
3. Check that O-ring (A) is NOT on the threads. Adjust
O-ring (A) if necessary.
4. Apply hydraulic system oil to O-ring (A).
Figure 8.7: Hydraulic Fitting
5. Install fitting (B) into the port until backup washer (D) and
O-ring (A) contact part face (E).
6. Position the angle fittings by unscrewing no more than
one turn.
7. Turn lock nut (C) down to washer (D) and tighten it to the
torque value indicated in the table. Use two wrenches, one
on fitting (B) and the other on lock nut (C).
8. Check the final condition of the fitting.
Table 8.6 O-Ring Boss (ORB) Hydraulic Fittings – Adjustable
SAE Dash Size
Thread Size (in.)
Torque Value
30
Nm
lbf·ft (*lbf·in)
-2
5/16–24
6–7 *53–62
-3
3/8–24
12–13 *106–115
REFERENCE
30. Torque values shown are based on lubricated connections as in reassembly.
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