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 184 of 775
TM 9-2350-311-10
Table 2-1. PREVENTIVE MAINTENANCE CHECKS AND SERVICES
FOR M109 SELF-PROPELLED HOWITZER - CONTINUED
Location
Item Interval
Item to Check/
Crewmember
No.
Service
Not Fully Mission
Procedure
Capable If:
76 *
Fire Control Instru-
CHIEF OF SECTION AND CREW
ments
Perform fire control alinement tests and measure-
Howitzer fails fire
ments.
control aline-
ment.
*Fire control alinement tests are performed by the section crew members under the supervision of the battery
executive officer, chief of firing battery, and artillery mechanic. These tests are performed at the discretion of the
unit commander, Suggested intervals for these tests are as follows.
1. Once each year if the cannon is used for non-firing training.
2. Once every 3 months if the cannon is fired.
3. As soon as possible after extensive use.
4. Following accidents.
5. After traveling over extremely rough terrain.
6. When fire control mounts have been replaced.
7. When the cannon fires inaccurately for no apparent reason.
8. When the cannon tube is replaced.
2-88
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