MacDon A40D - O-Ring Boss Hydraulic Fittings - Adjustable

262334 238 Revision A
Table 7.10 Flare-Type Hydraulic Tube Fittings (continued)
SAE Dash Size
Thread Size (in.)
Torque Value
6
Flats from Finger Tight (FFFT)
Nm
lbf·ft Tube
Swivel Nut or
Hose
-12
1 1/16–12
113–124 83–91
1 1/2 1 1/4
-14
1 3/16–12
136–149 100–110
1 1/2 1 1/4
-16
1 5/16–12
160–176 118–130
1 1/2
1
-20
1 5/8–12
228–250 168–184
11
-24
1 7/8–12
264–291 195–215 1 1
-32
2 1/2–12
359–395 265–291 1 1
-40 3–12
——
11
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.
1003431
A
B
C
D
Figure 7.11: Hydraulic Fitting
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 that it 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).
REFERENCE
6. Torque values shown are based on lubricated connections as in reassembly.