O-Ring Boss Hydraulic Fittings - Non-Adjustable; O-Ring Face Seal Hydraulic Fittings - MacDon M155 Unloading And Assembly Instructions

8.1.6 O-Ring Boss Hydraulic Fittings – Non-Adjustable
The standard torque values for non-adjustable hydraulic fittings are provided. 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.
1. Inspect O-ring (A) and seat (B) for dirt or defects.
2. Ensure that O-ring (A) is NOT on the threads. Adjust
O-ring (A) if necessary.
3. Apply hydraulic system oil to the O-ring.
4. Install fitting (C) into the port until the fitting is hand-tight.
5. Torque fitting (C) according to values in Table
280.
6. Verify the final condition of the fitting.
Table 8.12 O-Ring Boss (ORB) Hydraulic Fittings – Adjustable and Non-Adjustable
SAE Dash Size
-2
-3
-4
-5
-6
-8
-10
-12
-14
-16
-20
-24
-32

8.1.7 O-Ring Face Seal Hydraulic Fittings

The standard torque values are provided for O-ring face seal 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.
Torque values are shown in the Table
10. Torque values shown are based on lubricated connections as in reassembly.
262320
REFERENCE
8.12, page
Thread Size (in.)
5/16–24
3/8–24
7/16–20
1/2–20
9/16–18
3/4–16
7/8–14
1 1/16–12
1 3/16–12
1 5/16–12
1 5/8–12
1 7/8–12
2 1/2–12
8.13, page 281.
280
C
Figure 8.13: Hydraulic Fitting
Torque Value
Nm
10–11
18–20
29–32
32–35
40–44
70–77
115–127
183–201
237–261
271–298
339–373
414–455
509–560
A
B
10
lbf·ft (*lbf·in)
*89–97
*159–177
21–24
24–26
30–32
52–57
85–94
135–148
175–193
200–220
250–275
305–336
375–413
Revision A