TM-9-2350-311-20-1 Maintenance Manual for Volume 1 M109 Hull Download
Page 46 of 1275
1-17 EQUIPMENT OPERATION AND DESCRIPTION — CONTINUED 1-17.9 Suspension System a. b. c. d. e. f. g. Torsion bar anchors (1) — secure the ends of the torsion bars (2). One anchor secures two torsion bars, one from the right and one from the left. Torsion bars (2) — secured at the anchor (1) and connected to the road wheel arm (3), the torsion bar acts like a spring for the road wheel and track. Road wheel arm (3) — connected to the torsion bar (2), the road wheel arm provides a pivot point between the torsion bar and the road wheel (4). Road wheels (4) — are suspended from the hull of the howitzer by road wheel arms (3). There are seven road wheels per side located between the sprocket and idler wheel. The road wheels have two wheel halves separated by a valley to allow track centerguides to pass between the halves. Shock absorbers (5) — handle differences in the terrain over which the vehicle operates. They are located in the front and back of the vehicle (road wheels 1 and 7). Bump stops (6) — keep shock absorbers (5) from moving beyond their limits. Idler arm assembly (7) and track adjuster (8) — the idler arm assembly consists of an idler arm with an idler wheel attached, all rotating within the idler arm housing. The angle of the idler arm and wheel is determined by the length of the track adjuster. The track tension may be increased or decreased by adding or removing GAA grease to or from the track adjuster. 1-32 TM 9-2350-311-20-1