TM-9-2350-311-10

HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5

TECHNICAL MANUAL; OPERATOR’S MANUAL

NOVEMBER 1994

TM-9-2350-311-10 - Page 456 of 775

TM 9-2350-311-10

3-6

ARMAMENT AND CAB MAINTENANCE — CONTINUED

3-6.7

Muzzle Brake and Bore Evacuator (11578385) — Continued

b. installation

Bore evacuator weighs approximately 210 pounds (95 kg). Use caution to avoid injury to

personnel.

1

Before installing bore evacuator (10), clean and lubricate (item 14, Appx G).

NOTE

•

Never replace check balls with standard bearing balls.

• Valve ring should be replaced if cracked or deformed. Notify unit maintenance for

replacement.

2

Install ten check balls (14) and slide valve ring (13) rearward.

3

Slide bore evacuator (10) rearward on cannon tube (6) and screw bore evacuator into position.

3-56 Change 2