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 117 of 219

TM 9-2350-274-BD

CHAPTER 9

TRACK AND SUSPENSIO N

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

9-1.

General.

The M 109 suspension works with torsion bar springs with seven individual y sprung dual

roadwheels on each side of the hull with four shock dampened roadwheel arms, one at

each corner. The track is a two double pin steel track adjusted by a rear mounted idler

assembly. Center guides are intergral to the track shoe and keep the track in position

by threading between the upper surfaces of the dual road wheels. The hull allows

clearance for the use of short tracking to recover or provide limited mobility.

9-2. Assessment Procedue.

- track,

. . . . . . . . . .

. . .

.

go to para 9-5

- roadwheels,

. . . . . . . . . . . . . . . . . .

go to para 9-5

- drive sprockets,

. . . . . . . . .

. . . . . . . . . . .

go to para 9-6

- roadwheel arms,

. . . . . . . . . . . . . . . . . . . .

go to para 9-7

- idler assembly,

. . . . . . . . . . . . . . . .

go to para 9-5

-shock absorbers, . . . . . . . . . . . . . . go to TM 9-2350-276-BD

9- 1