Labounty 513914, Руководство по безопасности, эксплуатации и техническому обслуживанию

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Maintenance Section 5 Page 15
MOBILE DEMOLITION PROCESSORS
TOOTH BUILD UP
AND HARDSURFACING
If desired, Swift-Lock Teeth can be built up and hard-
surfaced to increase their life. Depending on the
situation, it may be more cost-effective to replace
the teeth when they become worn rather than build
them up.
It is necessary to build up and hardsurface the teeth
when there is adequate time for them to cool slowly
before they are put back into service.
Use the following process to build up and hardsur-
face the teeth:
1. Clean all dirt and grease from the areas to be built
up. If any old hardsurfacing still exists, remove it
down to the base metal by grinding.
2. Place the build-up template (supplied by LaBoun-
ty) along the tooth to determine the amount of
build-up required (Figure 5-7).
3. Preheat the tooth to about 200º F (100º C) to
remove moisture. Preheat the area to be built up to
300º - 400º F (150º - 200º C). DO NOT exceed 450º F
(230º C). Use a temperature stick to test the area
frequently, because overheating can harm the tooth.
Temperature sticks are available from LaBounty.
4. Using AWS E7018 welding rod or equivalent,
make side-by-side passes down the face of the
cutting edge until the area is covered. Stress relieve
and remove slag after each pass by peening vigor-
ously. Continue to do this until the profile of the
tooth matches the template as closely as possible.
Grind the edges square to match the template
profile.
• Remove paint before welding or heating.
Hazardous fumes can be generated when paint is
heated.
• When sanding or grinding paint, do not breathe
the dust. Wear an approved respirator.
• If you use solvent or paint stripper, remove the
stripper with soap and water before welding.
Remove solvent or paint stripper containers and
other flammable material from the area.
• Have a fire extinguisher nearby during all
cutting and welding operations. Clean areas to
be cut or welded of oil and flammable materials.
Protect all flammable areas from sparks.
• Do all work in a well-ventilated area. Dispose of
paint and solvent properly.
• Check the temperature often during this
procedure to maintain 300-400ºF (150-200ºC), but
DO NOT exceed 450ºF (230ºC).
FIGURE 5-7
BUILD-UP TEMPLATE