MacDon M155 2022 - O-Ring Boss Hydraulic Fittings - Adjustable

215676 470 Revision A
Table 8.10 Flare-Type Hydraulic Tube Fittings (continued)
SAE Dash Size
Thread Size (in.)
Torque Value
51
Flats from Finger Tight (FFFT)
Nm
lbf·ft Tube
Swivel Nut or
Hose
-10
7/8–14
81–89 60– 66
1 1/2 1 1/2
-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 1 1
-24
1 7/8–12
264–291 195–215 1 1
-32
2 1/2–12
359–395 265–291
11
-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, use the value specified in the procedure instead.
1003431
A
B
C
D
Figure 8.11: 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).
REFERENCE
51. Torque values shown are based on lubricated connections as in reassembly.