Flare-type hydraulic fittings, Table 6.9 metric bolt bolting into cast aluminum – MacDon FD75 OM User Manual
Page 263
Metric Bolt Specifications Bolting into Cast Aluminum
Table 6.9 Metric Bolt Bolting into Cast Aluminum
Bolt Torque
8.8
(Cast Aluminum)
10.9
(Cast Aluminum)
Nominal
Size (A)
ft·lbf
N·m
ft·lbf
N·m
M3
1
M4
2.6
4
M5
5.5
8
M6
6
9
9
12
M8
14
20
20
28
M10
28
40
40
55
M12
52
70
73
100
M14
M16
Figure 6.9: Bolt Grades
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 the flared surfaces.
3.
Torque the fitting nut (E) to the specified number of
flats from finger tight (FFFT) or to a given torque value
shown in the following table.
4.
To prevent the fitting (D) from rotating, use two
wrenches. Place one wrench on the fitting body (D)
and tighten the nut (E) with the other wrench to the
torque shown.
5.
Assess the final condition of the connection.
Figure 6.10: Hydraulic Fitting
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Revision A