TM-9-2350-358-BD
HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A6
TECHNICAL MANUAL; OPERATOR’S, UNIT, AND DIRECT SUPPORT SUPPORT MAINTENANCE
MARCH 1994
TM-9-2350-358-BD - Page 260 of 343
TM 9-2350-358-BD
12-7.
BORE EVACUATOR DAMAGE - CONTINUED
Materials/Tools:
•
Welding equipment
•
Grinder
•
Sheet metal, 1/4-inch thick (size dependent on damage) (scavenge from available source)
•
Wire brush
Procedural Steps:
1.
Use acetylene torch and grinder to cut and remove any burrs or protruding metal edges from damaged bore
evacuator.
2.
Clean any blocked gas ports, if accessible.
3.
Measure and record dimensions of damaged area (items B and C).
4.
Use acetylene torch to cut a patch from sheet metal 1/4 to 1/2-inch larger than damaged area (Items A and D).
5.
Shape patch to fit curve of bore evacuator.
6.
Wire brush both mating surfaces.
CAUTION
If arc welding cab, ground welding equipment to cab only.
Parts of slipring and race bearings can
be damaged from high currents conducted between hull and cab.
If welding equipment is not
grounded correctly.
12-8
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