Instructions For Electrical Welding - Volvo FM Handbook

Instructions for electrical welding

These instructions generally apply to all types of
electric welding work on vehicles.
Welding must be carried out with great accuracy to
achieve a satisfactory joint. Great care must be taken
to avoid damage, personal injuries and accidents.
When carrying out welding, it is important that the
following measures are taken in order to avoid
personal injuries or damage to the vehicle:
• The welder must have sufficient knowledge of
welding on vehicles. For this reason, a trade
education is necessary
• It is important to prepare the welding area carefully.
Heat sensitive parts such as cabling and air ducting
shall be protected or removed
• The welding area and the location of the welding
machine's earth connection must be clean. I.e. paint,
corrosion, oil, grease and dirt etc shall be removed.
• The cable clip should be in contact with the
material to be welded to prevent damage to any
electrical components. The connecting clip must
also make good contact with the material being
welded. This is to prevent damaging electrical
components. If two parts are to be welded together,
it is essential that both of these are connected to the
welding machine's earth connection.
• Ensure that no electrical casings (e.g. the control
unit) come into contact with the welding electrode
or the welding machine's earth connection.
• A direct current is generally used for welding
• When carrying out welding in a cab, the airbag
should be disconnected to avoid personal injuries
• When carrying out welding in a cab, put the starter
key in stop mode and disconnect connectors to
instrument cluster and other control units
After completed welding — paint the welded area.
Maintenance 547