Flare-Type Hydraulic Fittings - MacDon R116 Unloading And Assembly Instructions

11.6.4 Flare-Type Hydraulic Fittings

1. Check flare (A) and flare seat (B) for defects that might
cause leakage.
2. Align tube (C) with fitting (D) and thread nut (E) onto
fitting without lubrication until contact has been made
between flared surfaces.
3. Torque fitting nut (E) to specified number of flats from
finger tight (FFFT) or to a given torque value in
Table 11.11, page 213.
4. Use two wrenches to prevent fitting (D) from rotating.
Place one wrench on fitting body (D), and tighten
nut (E) with other wrench to torque shown.
5. Assess final condition of connection.
Table 11.11 Flare-Type Hydraulic Tube Fittings
SAE Dash Size Thread Size (in.)
-2
-3
-4
-5
-6
-8
-10
-12
-14
-16
-20
-24
-32
-40
5. Torque values shown are based on lubricated connections as in reassembly.
214713
Nm
5/16–24 4–5
3/8–24 7–8
7/16–20 18–19
1/2–20 19–21
9/16–18 30–33
3/4–16 57–63
7/8–14 81–89
1-1/16–12 113–124
1-3/16–12 136–149
1-5/16–12 160–176
1-5/8–12 228–250
1-7/8–12 264–291
2-1/2–12 359–395
—
3–12
REFERENCE
C
Figure 11.17: Hydraulic Fitting
Torque Value 5
lbf·ft
3–4
5–6
13–14
14–15
22–24
42–46
60–66
83–91
100–110
118–130
168–184
195–215
265–291
—
213
B
A
E
Flats from Finger Tight (FFFT)
Swivel Nut or
Tube
—
—
2-1/2
2
2
2
1-1/2
1-1/2
1-1/2
1-1/2
1
1
1
1
D
Hose
—
—
2
2
1-1/2
1-1/2
1-1/2
1-1/4
1-1/4
1
1
1
1
1
Revision A