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

Страница: 69 / 117

Maintenance Section 5 Page 31
MSD SABER SERIES SHEARS
WELD-IN TIP REPLACEMENT
continued
8. Once it is tacked in the proper position, preheat the tip area to a minimum of 400°F (200°C) and a maximum of
450°F (230°C).
9. Use the recommended build-up weld rod to fi ll the chamfered areas with multiple passes. Do the sides fi rst
and stress relieve each pass by peening. A weld is required on both sides of the tip (see Figure 5-33 ).
10. Weld the back and front to the upper shear, following the same procedure.
11. Grind the welds fl ush on the sides. The weld on the wear plate side should be ground fl ush with the front
wear plate.
12. If the temperature within 6" (150 mm) of the area has dropped below 400°F (200°C) during the weld process,
post heat this area to 400°F (200°C).
13. 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.
The upper shear must be grounded when
welding on the upper shear to prevent the
possibility of electric shock and arcing through
the cylinder or main pivot components.
Check temperature frequently during this procedure. Main-
tain 400-450ºF (200-230ºC). Do not exceed 450º (230ºC).
FIGURE 5-33
NOTICE