MacDon M155 Operators Manual - Manual (Page 271)

MAINTENANCE AND SERVICING
5.2.3 Metric Bolt Specifications Bolting into Cast Aluminum
Table 5.9 Metric Bolt Bolting into Cast Aluminum
Bolt Torque
8.8
(Cast Aluminum)
10.9
(Cast Aluminum)
Nominal
Size
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 5.4: Bolt Grades
A - Nominal Size
5.2.4 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 the flared surfaces.
3. Torque the fitting nut (E) to the specified number
of 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 5.5: Hydraulic Fitting
A - Flare B - Flare Seat
C - Tube D - Body
E - Nut
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Revision A