O-Ring Boss (Orb) Hydraulic Fittings - MacDon D65 Operator's Manual

Table 6.10 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

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 the following
table, while holding body of fitting with a wrench.
11. Torque values shown are based on lubricated connections as in re-assembly.
169594
MAINTENANCE AND SERVICING
Nutsize
Threadsize
across flats
(in.)
(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
Torque value
ft·lbf Nm
6 8
9 12
12 16
18 24
34 46
46 62
75 102
90 122
105 142
Figure 6.8
A - Fitting
D - O-ring
120
Flats from finger
11
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. C