General Guidelines For Build-Up And Hardsurfacing - Labounty CP 80 Safety, Operation & Maintenance Manual

CONCRETE PULVERIZERS
GENERAL GUIDELINES FOR BUILD UP AND HARDSURFACING
The steel used in LaBounty attachments is stronger and more durable than ever. However, this steel requires
special attention during maintenance. Pay particular attention to the preheat and post-heat instructions and
follow them exactly. Review the following guidelines for build-up and hardsurfacing the attachment—detailed
instructions on maintaining specifi c areas of the attachment are on the following pages. Contact your Stanley
LaBounty dealer or the Stanley LaBounty Service department for further information.
PREHEAT
Preheat the general surrounding area to at least 200°F (100°C) to remove moisture from the base material.
Before ANY thermal process is applied to the concrete pulverizer steel, including welding, tack welding, torch
cutting, and air-arcing, preheat the area within 6" (150 mm) of the local area to a minimum of 400°F (200°C)
and a maximum of 450°F (230°C). Preheat must be uniform throughout the material thickness and maintained
until all welding has been completed. Avoid cyclic heating and large temperature swings. Preheating may be
done by localized gas torches or thermal strip blankets.
POST HEAT
If preheat has dropped below 400°F (200°C) within 6" (150 mm) of the weld area, post heat to 400° (200°C)
and wrap with heat blanket to allow it to cool slowly to the ambient temperature. Plan to perform build-up and
hardsurfacing at the end of the day or when there will be adequate time for the welded areas to cool before
putting the attachment back into service.
HANDLING AND STORAGE OF WELD MATERIALS
Follow the weld manufacturer's handling and storage instructions closely. Make sure the electrodes or wire
are free of moisture. Moisture can cause cracks and porosity in the weld and possibly the base metal beneath
the weld.
WELD QUALITY
Quality and attention to detail in welding can signifi cantly affect the life of the attachment. Stanley LaBounty
strongly recommends that only qualifi ed and certifi ed welders perform this work. Make sure the weld con-
sumables and base material are clean, dry, and free of grease, paint, dirt, or any other foreign substance that
may harm the weld.
NOTICE
Preheat and post-heat instructions must be followed
exactly. Failure to do so can compromise warranty
coverage.
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