Replacing The Wire Liner - Helvi UNIMIG 298+T2E Manual De Uso

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Loosen and lower the plastic knob (A) (Fig.9). Open the

pressure arm (B) of the feeder. Extract the wire from the

torch liner (E).

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When the wire is disconnected, grasp it with pliers so that it

cannot exit from the spool. If necessary, straighten it before

inserting it in the wire input guide (C). Insert the wire on the

lower roll (D) and in the torch liner (E).

WARNING: keep the torch straight. When feeding a

new wire through the liner, make sure the wire is cut

cleanly (no burrs or angles) and that at least 2 cm

from the end is straight (no curves). failure to follow

these instructions could cause damage to the liner.

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Lower the pressure arm (B) and place the knob (A). Tighten

slightly. If tightened too much, the wire gets locked and

could cause motor damage. If not tighten enough, the rolls

will not feed the wire.

WARNING: When changing the wire diameter being

used, or replacing the wire feed roll, be sure that

the correct groove for the wire diameter selected

is inside, closest to the machine. The wire is driven

by the inside groove. feed rolls are marked on the

side identifying the groove nearest that side.

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Close the side panel of the machine. Connect the power

supply cable to the power output line. Turn on the switch.

Press the torch switch. The wire fed by the wire feeding mo-

tor at variable speed must slide through the liner. When it

exits from the torch neck, release the torch switch. Turn off

the machine. Mount the contact tip and the nozzle.

When checking the correct exit of the wire from the torch do not bring your face

near the torch, you may run the risk to be wounded by the outgoing wire. Do not

bring your fingers close to the feeding mechanism when working! The rolls, when

moving, may crush the fingers. Periodically, check the rolls. Replace them when

they are worn and compromise the regular feeding of the wire.

8.0

Before performing this procedure, ensure the gas and electrical supplies are di-

sconnected.

The procedure to follow for

replacing the wire liner depends

upon the torch connection type of

your welder.

•

Open the side panel. Loo-

sen and lower the plastic

knob (A) and release the

pressure arm (B) (Fig. 9).

Cut the wire (in the case it is

installed) grasp it with pliers

so that it cannot exit from

the spool and fix it on the

suitable hole in the reel. Re-

move the nozzle and con-

tact tip. Remove with pliers

the wire from the hose and

torch assembly.

If the torch is already mounted connected and has a gas valve on the handle (fig. 10):

•

Remove the screws (1-2) securing the torch support bracket (3).

-ENGLISH-