Maintenance
Section 5
Page 29
MSD SABER SERIES SHEARS
WELD-IN TIP MAINTENANCE
continued
6.
Apply build up to the worn areas (see General Rules
for Build Up and Hardsurfacing). Peen each pass vigor-
ously to relieve weld stress and remove slag.
7.
To hardsurface the built up area, apply single pass-
es, side by side. Peen each pass.
8.
When welding is complete, grind the tip smooth
and square with wear plate and cutting blades. Check
it again with the straight edge and build-up template.
9.
To check the fi t of the tip, close the shear until the
piercing tip begins to enter the lower shear (see
Fig-
ure 5-29
). The piercing tip should fi t squarely into the
lower jaw.
10.
When fi nished reworking the tip, work harden it
by peening the welded area until it is shiny or until the
peener cannot dent the weld anymore (approximately
fi ve minutes).
11.
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).
12.
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 cooled.
Check temperature frequently during this procedure.
Maintain 400-450ºF (200-230ºC). Do not exceed 450º
(230ºC).
FIGURE 5-28
LINE UP TEMPLATE
WITH BLADE EDGES
UPPER BUILD-UP
TEMPLATE
FIGURE 5-29
CHECK FOR CLOSE
AND SQUARE FIT
NOTICE
