MSD 7R SHEARS
Scheduled Maintenance
Section 6 Page 3
UPPER SHEAR BUILD UP AND
HARDSURFACING
CONTINUED
It is important to use an air operated slag peener on
each pass of weld to relieve stress. Be sure to grind
off in line with cutting edges.
7.
To determine how much build-up is required along
the blade seats, place a square or straight edge in a
cross section to the blades. Repeat steps 3 and 4 to
buildup this area (see figure 6-3).
8.
To hardsurface the area, from behind the pierc-
ing tip to approximately the midpoint of the primary
blade, apply 3 or 4 beads of Amalloy 814 in single
passes running the length of the shear (figure 6-4)
9.
Hardsurface should end approximately at the
midpoint of the primary blade. Stagger the ends of
the welds.
DO NOT
end welds within 1” (25 mm)
of bolt holes.
DO NOT
undercut ends of weld. Taper
ends of welds into the base metal with grind marks
going with the grain.
FIGURE 6-3
FIGURE 6-4
STAGGER WELDS
NOTICE
GRAIN
