Stanley MSD 1000, Руководство по безопасности, эксплуатации и техническому обслуживанию

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Maintenance Section 5 Page 27
MSD SABER SERIES SHEARS
UPPER SHEAR BUILD UP AND HARDSURFACING
1. Apply a bead of hardsurface rod on top of each of the underlayment beads. It is important to use an air
operated slag peener on each pass to relieve weld stress.
2. To determine how much build up is required along the blade seats, place a straightedge across the blades.
Repeat steps 4 and 5 to build this area fl ush with the blade (see Figure 5-23 ).
3. If necessary, build-up along the top and front edges of the secondary blade seat fl ush with the blade (see
Figure 5-24 ). The blade should not stick out beyond the edge of the seat in this area.
4. To hardsurface the area alongside the upper blades, establish the pattern with three or four passes of
build-up. These beads should run parallel to the blades from behind the Saber Tip to approximately the mid-
point of the primary blade (see
Figure 5-25 ).
5. Apply hardsurfacing on top of each of the underlayment beads. Do not apply hardsurface directly to the
parent material. It is important to use an air operated slag peener on each pass of weld to relieve stress.
6. If the temperature within 6" (150 mm) of the weld area has dropped below 400°F (200°C) during the weld
process, post heat this area to 400°F (200°C).
7. Wrap with a heat blanket and allow the welded area to cool slowly to the ambient temperature. The shear
should not be put back into service until it has cooled completely.
STAGGER WELDS
GRAIN DIRECTION
FIGURE 5-23 FIGURE 5-24 FIGURE 5-25
BUILD UP AREA FLUSH
WITH BLADE
BUILD UP AREA FLUSH
WITH BLADES
•
Keep the outside passes at least 1/4 " (6 mm) back from the blade seat and outer edges.
•
Stagger the ends of the welds and do not end a weld adjacent to a blade bolt hole.
•
Use a grinder to taper the ends of each weld down to the base material. Grind marks should go with the
grain.
•
Do not undercut the ends of the weld with the grinder.
NOTICE