Attachment Build-Up And Hardsurfacing - Labounty CP 80 Safety, Operation & Maintenance Manual

CONCRETE PULVERIZERS
ATTACHMENT BUILD UP
AND
HARDSURFACING
If desired, additional areas of the lower and upper
jaws may be built up and hardsurfaced to increase
their life. Stanley LaBounty recommends that only
certain areas of the attachment be hardsurfaced.
Hardsurfacing applied to non-approved areas can
cause serious damage to the attachment and limit
its performance. See fi gure 5-7 for approved surfac-
es. Hardsurface these areas only when there will be
adequate time for them to cool slowly before they
are put back into service. Use the following process
to build-up and hardsurface the desired area.
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. Preheat the area to approximately 200ºF (100ºC)
to remove moisture then heat the area to be built
up to 300-400ºF (150-200ºC). Do not exceed 450ºF
(230ºC). Use a temperature stick to test the area
frequently to avoid overheating and damaging the
attachment. Temperature sticks are available from
Stanley LaBounty.
3. Using AWS E7018 welding rod or equivalent, make
side-by-side passes until the area is covered. Stress
relieve and remove slag after each pass by peening
vigorously. Continue to do this until the profi le of the
area matches the template.
NOTICE
Check the temperature often during this procedure
to maintain 300-400ºF (150-200ºC). Do not exceed
450ºF (230ºC).
Page 12 Section 5 Maintenance
• 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 fl ammable material from the area.
• Have a fi re extinguisher nearby during all cutting
and welding operations. Clean areas to be cut or
welded of oil and fl ammable materials. Protect all
fl ammable areas from sparks.
• Do all work in a well ventilated area. Dispose of
paint and solvent properly.
FIGURE 5-7