Lincoln Electric IM724 manual GUN Installation, GAS Connection, Work Cable Installation

A-4 INSTALLATION A-4

Work Cable Installation

Refer to Figure A.2.

1.Open the wire feed section door on the right side of the SP-135T.

2.Pass the end of the work cable that has the termi- nal lug with the smaller hole through the Work Cable Access Hole (1) in the case front.

3.Route the cable under and around the back of the Wire Feed Gearbox (6).

4.For GMAW Only: Refer to Figure A.2. As deliv- ered, the machine is connected for positive elec- trode polarity. This is the appropriate configuration for the GMAW (MIG) process. To complete installa- tion, use the provided wing nut to connect the work cable’s terminal lug to the negative (–) output ter- minal (5) located above the Wire Feed Gearbox

(6). Make sure that both wing nuts are tight.

5.For Innershield Only: Refer to Figure A.4. To wire for negative polarity (required for the Innershield process), connect the short cable attached to the connector block (1) to the negative (–) output termi- nal (2) and the work cable (3) to the positive (+) terminal (4).

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3

2

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FIGURE A.4

GUN INSTALLATION

As shipped from the factory, the SP-135T is ready to feed .023" – .025" (0.6 mm) solid wire. If .030" (0.8

mm)solid wire is to be used, change the contact tip to the appropriate size.

NOTE: If .035" (0.9 mm) Innershield flux-cored wire is to be used, the .035” Innershield Welding kit is required (see ACCESSORIES section).

Connecting Gun Cable to the SP-135T

1.Refer to Figure A.2. Unplug the machine or turn power switch to the OFF “O” position.

2.Pass the insulated terminals of the gun trigger con- trol leads, one at a time, through the Gun Cable and Control Lead Access Slot (2) in the case front. The leads are to be routed under the Wire Feed Gearbox (6) and through the Cable Hanger (7) on the inner panel.

3.Insert the connector on the gun conductor cable through the Gun Cable Access Hole (2) in the SP- 135T case front. Make sure the connector is all the way in the brass connector block. Unscrew thumb- screw on the connector block a few turns if gun connector will not insert fully. Rotate the connector so control leads are on the underside and tighten the Thumbscrew (8) in the connector block.

4.Connect the gun trigger control lead terminals to the two insulated 1/4" (6.4 mm) tab terminal con- nector bushings located below the “Gun Trigger Connection” decal in the wire feed section (4). Either lead can go to either connector. Form the leads so that they are as close as possible to the inside panel.

CAUTION

If the gun trigger switch being used is other than that supplied with the SP-135T, the switch must be a normally open, momentary switch. The terminals of the switch must be insulated from the welding circuit. Malfunction of the SP-135T may result if this switch shorts to the SP-135T welding output circuit or is common to any electrical circuit other than the SP-135T trigger circuit.

GAS CONNECTION

When using the GMAW process, a cylinder of shield- ing gas, must be obtained. For more information about selecting gas cylinders for use with the SP-135T refer to the ACCESSORIES section.

SP-135T