WELDING

TM 5-5420-279-23

WELDING

Tools and Equipment

A MIG welding set of 400 amps minimum capacity complete with hard and soft wire rollers of

appropriate diameter. The set should be fitted with the recommended Binzel 501D, or equivalent,

water cooled welding torch which will require cooling water and argon supplies. A weld table and

tools including wire cutters and a stainless steel wire brush will be required. Also a rotary

stainless steel wire brush and powered hand tool fitted with milling burrs. An over-head crane.

Fume extraction shall be provided at the welding facility, static or mobile systems may be used

together with respiratory welding helmets.

Safety

Preliminary Precautions

Before beginning any welding or cutting operations on the equipment, the safety precautions

listed below must be considered.

(1)

Remove all ammunition from, on, or about the vehicle or materiel.

(2)

Drain the fuel tank and close the fuel and oil tank shut off valves.

(3)

Have a fire extinguisher nearby.

(4)

Keep heat away from optical elements.

(5)

Be familiar with and observe the safety precautions prescribed in chapter 2 of

TC 9-237.

Weld Specification

A weld is specified by the type of joint, welding position and the welding conditions. For each

repair refer to the drawing requirements (Section 5) and related weld procedure (Section 6). All

welding is to conform to ISO 5817 (Steel) and ISO 10042 (Aluminum) at the moderate level for

repair.

CAUTION

Artificial ageing of alloy 232B is not permitted. Components repaired by welding will suffer

a serious loss of proof strength in the heat affected zone and this can only be restored by

natural ageing. Protective coatings such as zinc and paint must be applied as soon as

possible after repair. For a component to achieve 75% of its original proof strength it

should be stored in accordance with figure 2-1.

Appendix K Page 2