TM-9-2350-277-34

CARRIER M113A3, M577A3, M1059A3, M1064A3, M1068A3 AND M58

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL

TM-9-2350-277-34 - Page 129 of 871

TM 9-2350-277-34

PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS), INCLUDING

LUBRICATION INSTRUCTIONS — Continued

0014 00

7)

MULTI-PASS WELDING.

Make sure edges of weld pool fuse right. Watch weld pool rather than arc. Any

oscillating of weaving motion should be slight, smooth, and slow. Brush material with clean stainless steel

wire brush after each pass. On small weldments, lower amperage slightly after each pass if welding members

become too hot.

CAUTION

Heat distortion during welding will damage aluminum castings. Do not attempt to repair

aluminum castings by welding.

c.

ALUMINUM CASTINGS

1)

FINAL DRIVE CASTING.

Welding in final drive aluminum casting is not authorized. Do not attempt to

weld on final drive housing assembly.

d.

MAGNESIUM CASTINGS

WARNING

Magnesium may catch on fire if welded or exposed to high temperatures. Do not weld on

magnesium castings or expose them to high temperatures.

WARNING

Fine particles of magnesium can catch fire and burn you. Be very careful when filing or

grinding on magnesium. Use grinding equipment marked FOR MAGNESIUM GRINDING

ONLY. Keep a Class D fire extinguisher close by.

WARNING

Water and foam type fire extinguishers will cause magnesium fires to flare up. Use a Class D

fire extinguisher or a sodium chloride base dry powder to fight magnesium fires.

0014 00-10

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