BIG 30 Diesel

Transformer T2

Installed Onto

Base Mounting

Strip

Right Front Cover

Of Unit

And BIG 30A DIESEL

Transformer T2 Installation

Figure 3-1. Location For Transformer T2 Installation

B. Transformer And Lower Panel Installation

C. Electrical Connections

ST-145 421

1.Locate and install supplied transformer T2 onto the welding generator as follows:

a.For BIG 30 DIESEL and BIG 30A DIESEL mod- els: Install T2 onto the right front portion of the base mounting strip at the prepunched hole lo- cations (see Figure 3-1). Secure T2 with the four supplied 1/4-20 x 3/4 in. screws, flat wash- ers, lockwashers, and nuts on BIG 30 DIESEL, but do not use flat washers and nuts on BIG 30A DIESEL.

b.For BIG 40 DIESEL, BIG 40G, and BIG 50 DIE- SEL models: Install the supplied mounting bracket onto T2, and secure bracket with the four supplied 1/4-20 x 3/4 in. screws, lock wash- ers, and flat washer. Mount T2 with bracket onto fuel tank and reactor Z1 support angles (see Figure 3-5) with T2 located below right front cor- ner of fuel tank. Secure mounting bracket to support angles with the three supplied 1/4-20 x 1/2 in. self-tapping screws.

IMPORTANT: To ease CV-2 electrical connections, re- move weld output terminal mounting bracket from left front upright Also, before securing CV-2 panel after in- stallation, check for clearance between lugs of preinstalled cables on the AC/DC Selector switch termi- nals and any welding generator components. Reposi- tion lugs at switch terminals as necessary to prevent contact between parts.

2.Install and secure the supplied CV-2 panel onto the welding generator with the hardware re- moved in Step 7 of Section A.

1.Disconnect cable 30 from rear of Negative weld output terminal.

2.Install a 6 in. (152 mm) long piece of supplied in- sulated tubing onto cable 30 disconnected in Step 1.

IMPORTANT: If unit is equipped with dc meters, con- nect negative (black) voltmeter lead at the connection point where cables 30 join together. Be sure that the voltmeter lead is installed last on top of the two cable ter- minal lugs.

3.Reconnect cable 30 to switch S1 cable 30 and se- cure with a supplied 1/4-20 x 1/2 in. flange screw and nut (see Figure 3-2).

4.Slide the installed tubing over connections, and secure with two supplied nylon cable ties (see Figure 3-2).

5.Disconnect cable 19 from rear of Positive weld output terminal.

6.Install the remaining 6 in. (152 mm) long piece of insulated tubing onto cable 19 disconnected in Step 5.

7.Reconnect cable 19 to switch S1 cable 19, and secure with a supplied 1/4-20 x 1/2 in. flange screw and nut (see Figure 3-2).

8.Slide the installed tubing over connection, and secure with two supplied nylon cable ties (see Figure 3-2).

9.Connect cable 28 from switch S1 to rear of Nega- tive weld output terminal (see Figure 3-2).

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