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5 Damage prevention
5.2 Welding work
MITSUBISHI FUSO body/equipment mounting directives for FE Issue date: 20. 10. 2020
! Only print out complete sections from the current version
The following safety measures must be observed to
prevent damage to welding parts;
• Do not weld any item to the frame to hold it
temporarily.
• Clean parts thoroughly with a wire brush and dry
them off before welding.
• Make sure the paint is completely removed, before
welding a painted part.
• Use a low hydrogen type welding electrode. The
welding electrode absorbs moisture when it is
used, so it is necessary to dry it thoroughly before
use.
• When welding, maintain the optimum welding
speed and conditions for the preservation of the
welding electrode.
• Maintain the welding current at the optimum value
for safety.
• Make several short welding beads rather than one
long bead.
• Make symmetrical beads to limit shrinkage.
• Avoid more than 3 welds at any one point.
• Avoid welding in strain hardened zones.
• When connecting the ground cable of the arc
welder, make sure to disconnect the negative
terminal from the battery. The ground of the
welder should be connected to the side rail near
the welded part. Never connect around the
transmission, propeller shaft, front and rear axles,
etc.
• When performing welding work on the chassis,
take proper measure to prevent the tubes,
harnesses, rubber parts, springs, etc. from heat or
spatter.
• Do not cool parts off with water after welding.
1 Deposited metal cracking
2Toe crack
3 Blow hole
4 Slag inclusion
5Under cut
6Poor penetration
i Additional information
Additional information on welded connections can
be found in Section 6 "Modifications to the basic
vehicles" É 6.1. and Section 8 "Electrics/elec-
tronics" É 8.1.
a Risk of accident and injury
Before performing electric of arc welding as part of
vehicle repair operation, disconnect the negative (-)
cable from the battery. The ground cable of the
welding machine should be connected to a point as
close to the welding area as possible.
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