O-Ring Boss (Orb) Hydraulic Fittings - MacDon R85 Operator's Manual

Table 7.10 Flare-Type Hydraulic Tube Fittings
Tube Size
SAE No.
O.D. (in.)
3 3/16
4 1/4
5 5/16
6 3/8
8 1/2
10 5/8
12 3/4
14 7/8
16 1

7.2.5 O-Ring Boss (ORB) Hydraulic Fittings

1. Inspect O-ring and seat for dirt or obvious defects.
2. On angle fittings, back off the lock nut until washer (A)
bottoms out at top of groove (B) in fitting.
3. Hand-tighten fitting until back up washer (A) or washer
face (if straight fitting) bottoms on part face (C) and
O-ring is seated.
4. Position angle fittings by unscrewing NO MORE THAN
one turn.
5. Tighten straight fittings to torque shown.
6. Tighten angle fittings to torque shown in table
O-Ring Boss (ORB) Hydraulic Fittings (Adjustable),
page 99, while holding body of fitting with a wrench.
1. Torque values shown are based on lubricated connections as in reassembly.
169455
MAINTENANCE AND SERVICING
Nut Size
Thread
Across
Size (in.)
Flats (in.)
3/8 7/16
7/16 9/16
1/2 5/8
9/16 11/16
3/4 7/8
7/8 1
1-1/16 1-1/4
1-3/8 1-3/8
1-5/16 1-1/2
7.11
Torque Value
ft·lbf N·m
6 8
9 12
12 16
18 24
34 46
46 62
75 102
90 122
105 142
Figure 7.6
A - Fitting
D - O-Ring
98
Flats From Finger
1
Tight (FFFT)
Flats
1
1
1
1
1
1
3/4
3/4
3/4
B - Lock Nut C - Washer
E - Groove F - Seat
Turns
1/6
1/6
1/6
1/6
1/6
1/6
1/8
1/8
1/8
Rev. E