TM-9-2350-274-BD
M109/M110/M578 VEHICLES HOWITZER, MEDIUM, SELF-PROPELLED FULL-TRACKED
TECHNICAL MANUAL; OPERATORS, ORGANIZATIONAL DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE
JANUARY 1984
TM-9-2350-274-BD - Page 128 of 219
TM 9-2350-274-BD
ARMAMENT AND FIRE CONTROL SYSTEM
SECTION II. Armament BDAR
10-4. BORE EVACUATOR DAMAGE
General Information
As a round is propelled through the gun tube, gas pressure is forced inside the bore evacuator. As the
round leaves the tube, bore evacuator pressure rushes out behind the round, exhausting excessive smoke
and fumes. If the evacuator is damaged or leaks, this pressure is lost, causing excessive smoke and fumes
to enter the turret as the breech block opens. This procedure repairs puncture damage to the bore
evacuator.
Limitations:
●
None
Personnel/Time Required:
●
1 soldier
●
1 hour
Other Option(s):
●
Open turret hatches and turn on turret blower.
Option 1: Fabricated clamp repair.
Material/Tools:
●
Acetylene torch.
●
Abestos paper or other suitable fire resistant material.
●
Grinder.
●
Hexagon head nut, 3/8-inch (as required).
●
Lockwashers (as required).
●
Machine screws, 3/8-inch (as required).
●
Sheet metal, 1/4-inch thick, about 21-inches long and wide enough to overlap damage.
Procedural Steps:
1. Use acetylene torch and grinder to cut and remove any burrs or protruding metal edges that may effect
air-tight seal.
■
10-4.2
Change 1
Back to Top
