Labounty CP 80 Safety, Operation & Maintenance Manual page 39

CONCRETE PULVERIZERS
TOOTH BUILD-UP
AND HARDSURFACING
continued
5. Start hardsurfacing the tooth by applying parallel passes of AWS E7018 build-up running the length of the
tooth (fi gure 5-6). These single passes should be 1/2" (13 mm) apart and will serve as an underlayment for the
hardsurface rod.
NOTICE
DO NOT apply the hardsurface directly to the parent material.
6. Apply a bead of Amalloy 814H rod or equivalent directly on top of each of the underlayment beads. It is impor-
tant to use an air-operated slag peener on each pass of weld to relieve stress.
7. Taper the ends of each hardsurface bead by grinding in line with the cutting edges. Do not undercut the weld
with the grinder.
8. When welding and grinding is complete, peen the welded area until it is shiny or until your peener cannot dent
the weld anymore (typically fi ve to ten minutes). This will harden the welded area.
9. When fi nished, be sure to cover the reworked teeth with a heat blanket to allow them to cool slowly.
HARDSURFACE BEADS
0.50" (13 MM)
FIGURE 5-6
Maintenance Section 5 Page 11