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 123 of 219

TM 9-2350-274-BD

CHAPTER 10

ARMAMENT AND FIRE CONTROL SYSTE M

BDAR FIXES SHALL BE USED ONLY IN COMBAT

AT THE DISCRETION OF THE COMMANDER

AND SHALL BE REPAIRED BY STANDARD MAINTENANCE PROCEDURES

AS SOON AS PRACTICABLE AFTER THE MISSION IS COMPLETED.

SECTION I. General

10-1. General.

Armament and fire control systems are two classes of equipment. Fire control. systems are essentially aids

to improve the accuracy and speed of armament firing operations. All armament systems provide manual

back up devices should the power controlled systems fail. This chapter provides information primarily

intended to overcome armament system failures, Fire control systems, because of their complexity, do not

lend themselves to BDAR procedures. Refer to the standard TMs for fire control repairs.

7-2.

Assessment Procedure.

-cannon assembly, . . . . . . . . . . . . go to para 10.4 and 10-5

-sighting system, . . . . . . . . . . . .

. go to standard maintenance TMs

-hull turret race . . . . . . . . . . . .

. . go to standard maintenance TMs

-breech assembly, . . . . . . . . . . . . . go to para 10-5,10-5.1

-traversing gear box, . . . . . . . . . .

. go to standard maintenance TMs

-elevation cylinder, . . . . . . . . . .

. . go to standard maintenance TMs

-hydraulic system, . . . . . . . . . . . . go to TM 9-2350-276-BD

Change 1

10-1