MacDon DWA - Flare-Type Hydraulic Fittings

215626 114 Revision A
6.1.4 Flare-Type Hydraulic Fittings
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Figure 6.10: Hydraulic Fitting
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 6.10,
page 114.
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 6.10 Flare-Type Hydraulic Tube Fittings
SAE Dash Size
Thread Size (in.)
Torque Value
9
Flats from Finger Tight (FFFT)
Nm
lbf·ft Tube
Swivel Nut or
Hose
-2
5/16–24
4–5
3–4
——
-3
3/8–24
7–8
5–6
——
-4
7/16–20
18–19 13–14
2 1/2
2
-5
1/2–20
19–21 14–15 2 2
-6
9/16–18
30–33 22–24 2
1 1/2
-8
3/4–16
57–63 42–46 2
1 1/2
-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
11
-24
1 7/8–12
264–291 195–215
11
-32
2 1/2–12
359–395 265–291 1 1
-40 3–12
——
11
REFERENCE
9. Torque values shown are based on lubricated connections as in reassembly.