5 Series E34 525td (M51) TOUR
41 00 ...
Welding and soldering steel parts
Important!
Comply with the following topics from "Body, General":
Safety regulations.
Handling electrical/electronic equipment, airbags and restraint systems.
A. Welding steel parts:
1. General information
-
The following procedures are used for repairs:
•
MAG welding (Metal Active Gas welding)
•
Resistance pressure spot welding (referred to in the following and in the repair instructions as spot welding).
-
Take the number and location of weld spots and MAG weld seams from the separated part. Replace areas
inaccessible to spot-welding tongs with MAG plug/spot welds at the same distance. Diameter of bores for
plug/spot welds 8 mm.
-
In the case of emissions extraction, observe a minimum distance of 30 cm for MAG welding during the welding
process. Otherwise the inert gas would be drawn off.
-
Follow the equipment manufacturer's instructions for use.
2. Work materials
-
MAG welding:
•
Steel welding apparatus (refer to Workshop Equipment Planning CD, Chapter 7).
•
Steel welding wire - G3SI1 (SG2) or alternatively G4SI1 (SG3)
•
Welding mask
•
Gas bottle containing inert gas (82 % argon, 18 % CO
2
)
-
Resistance pressure spot welding:
•
Spot-welding apparatus (refer to Workshop Equipment Planning CD, Chapter 7).
•
Protective goggles
3. Preparations for MAG and spot-welding
-
Remove the paint coating in an area of approx. 30 mm around the weld seam or spot.
•
The zinc coating underneath must be removed during the MAG welding operation.
•
It is not necessary to remove the zinc coating underneath during spot-welding.
-
Remove the paint coating on the reverse side of the weld seam or spot.
RA Welding and soldering steel parts
BMW AG - TIS
23.01.2013 07:57
Issue status (12/2007) Valid only until next DVD is issued
Copyright
Page - 1 -
