SP000016General Maintenance Procedures
Page 6
WELDING PRECAUTIONS AND
GUIDELINES
IMPORTANT
To avoid accidents, personal injury and the possibility of
causing damage to the machine or to components, welding
must only be performed by properly trained and qualified
personnel, who possess the correct certification (when
required) for the specific welding fabrication or specialized
repair being performed.
WARNING
Structural elements of the machine may be built from a
variety of steels. These could contain unique alloys or may
have been heat treated to obtain particular strength
characteristics. It is extremely important that welding
repairs on these types of steel are performed with the
proper procedures and equipment. If repairs are performed
incorrectly, structural weakening or other damage to the
machine (that is not always readily visible) could be
caused. Always consult DOOSAN After Sales Service
before welding on integral components (loader arm, frames,
car body, track frames, turntable, attachment, etc.) of the
machine. It is possible that some types of structurally
critical repairs may require Magnetic Particle or Liquid
Penetrant testing, to make sure there are no hidden cracks
or damage, before the machine can be returned to service.
CAUTION
Always perform welding procedures with the proper safety
equipment on hand. Adequate ventilation and a dry work
area are absolutely essential. Keep a fire extinguisher
nearby and always wear protective clothing and the
recommended type of eye protection.
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