© ESAB AB 1999
- 8 -
bg03d1ea
6.2
Replacing the air filter
In order to protect the pneumatic motor of the welding gun from impurities the PKB
guns are provided with an air filter.
The filter is fitted in the gun housing in the groove between the two O-rings where
the gas hose is connected.
When a new filter is to be fitted the outer ring must first be removed.
S
Make sure the filter is properly fixed before the O-ring is fitted.
6.3
Replacing the wire guide
a
Inlet nozzle
f
Shielding gas inlet
b
Compression gland
g
Compressed-air inlet
c
Wire guide
h
O-rings
(inside the tube)
d
O-rings
i
Outlet nozzle
e
Inlet end
S
Undo the locking screws on the welding hose connections to the wire feed unit
and the gun, then pull out the welding hose.
S
Pull out the inlet nozzle (
a
) and screw out the compression gland (
b
) on the inlet
side and the outlet nozzle (
i
) on the gun side.
S
Withdraw the wire guide (
c
) from the inlet end. Make sure the o-rings (
d
) in the
connecting piece come along.
S
Fit the new wire guide. Stretch out the welding hose and check that the o-rings at
the end of the gun are properly fitted in the grooves. Taper the end of the wire
guide using a file.
S
Insert the new guide through the gun connection. If this proves troublesome,
lubricate the end of the wire guide with a little oil or silicon grease.
S
Fasten the inlet nozzle (
i
) with screws at the gun end of the welding hose.
S
Adjust the length of the guide (
c
) at the inlet end (
e
) of the welding hose. Cut the
guide so as to include an excess length of six mm per metre hose, e.g. for a
five-metre welding hose the wire guide is to be cut 30 mm outside the inlet end
of the hose.
S
Insert the o-rings round the wire guide and then fasten the compression gland
(
b
) with screws.
S
Press in the inlet nozzle (
a
).
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