O-Ring Boss Hydraulic Fittings - Adjustable - MacDon M155 Unloading And Assembly Instructions

Table 8.10 Flare-Type Hydraulic Tube Fittings (continued)
Thread Size (in.)
SAE Dash Size
-12
-14
-16
-20
-24
-32
-40
8.1.5 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, refer to the value specified in the procedure instead.
1. Inspect O-ring (A) and seat (B) for dirt or 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. Ensure that O-ring (A) is NOT on the threads. Adjust
O-ring (A) if necessary.
4. Apply hydraulic system oil to O-ring (A).
8. Torque values shown are based on lubricated connections as in reassembly.
262320
Nm
1 1/16–12 113–124
1 3/16–12 136–149
1 5/16–12 160–176
1 5/8–12 228–250
1 7/8–12
264–291
2 1/2–12
359–395
—
3–12
REFERENCE
Torque Value 8
lbf·ft
83–91
100–110
118–130
168–184
195–215
265–291
—
B
Figure 8.11: Hydraulic Fitting
278
Flats from Finger Tight (FFFT)
Swivel Nut or
Tube
Hose
1 1/2 1 1/4
1 1/2 1 1/4
1 1/2 1
1 1
1 1
1 1
1 1
C
D
A
Revision A