8
Snap-on Tools Corporation Kenosha, WI 53141-1410
WIRE FEED PRESSURE ROLL ADJUST-
MENT
OPERATION
The following operating instruc-
tions and detailed setup procedures
enable an operator without previous
experience to produce quality fu-
sion welds. It is recommended that
an operator without prior experi-
ence with this equipment, first
practice on scrap metal of the same
type and thickness as the material
to be welded.
The wire feed pressure roll is
adjusted to the proper setting at
the factory, prior to delivery. It
may be necessary to readjust the
setting as components "seat in" or
when changing to a different diame-
ter wire. To check for proper roll
pressure, hold the torch in one hand
and the wire between two fingers of
the other hand. Pull the torch
trigger. If the wire continues to
feed when firm pressure is applied
to the wire, the pressure roll
adjusting nut should be backed off
until the feed rolls start to slip.
If the wire will not feed with very
little pressure applied, the pres-
sure roll adjusting nut should be
tightened.
OPERATING SEQUENCE
Make sure that the pieces of
metal to be welded are free of
grease, dirt, paint and scale.
Use a wire brush to remove paint
and scale. Paint must be com-
pletely removed to bare metal.
Grease and oil could burn and
cause a fire or safety hazard.
Failure to clean the metal prop-
erly will result in erratic and
porous welds.
Install the unit as directed in
the installation instructions
and make sure the work clamp is
firmly attached to a cleaned
area on the workpiece to be
welded.
Open the shielding gas cylinder
valve. Press the torch trigger
and listen for gas flow.
CAUTION
The welding wire will feed
when the trigger is actu-
ated. Take care that the
wire is not directed to hit
yourself or anything that
is common to the work cable
on the welder.
WORK (GROUND) CABLE
Uncoil the work (ground) cable
and plug it into the negative (-)
terminal on the machine.
1.
2.
3.
PRESSURE
ROLL ARM
PRESSURE
ROLL
PRESSURE ROLL
ADJUSTING NUT
DRIVE
ROLL
FIG. 10. PRESSURE ROLL ADJUSTMENT
