MacDon M155 - Flare-Type Hydraulic Fittings; Metric Bolt Specifications Bolting into Cast Aluminum

REFERENCE
Metric Bo lt Speci fications Bolting into Cast Aluminum
Table 8.9 Metric Bolt Bolting int o C ast A luminum
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 8.9
:BoltGrades
Flare-Type Hydrau lic Fittings
1. Check flare (A) a
nd flare seat (B) for defects that might
cause leakage
.
2. Aligntube(C)
with fitting (D) and thread nut (E) onto
fitting withou
t lubrication until contact has been made
between the fla
red s urfaces.
3. Torque the fit
ting nut (E) to the specified number of
flats from fing
er tight (FFFT) or to a given torque value
in Table 8.10
Flare-Type Hydraulic Tube Fittings, page
459.
4. Use two wren
ches to prevent fitting (D) from rotating.
Place one wr
ench on the fitting body (D) and tighten
nut ( E) with
the other wrench to the torque shown.
5. Assess the
final condition of the connection.
Figure 8.10: Hydraulic Fitting
147649 458 Revision A