TM-9-2350-311-20-1

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

TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL FOR HULL, POWERPLANT, DRIVE CONTROLS, TRACKS, SUSPENSION, AND ASSOCIATED COMPONENTS

AUGUST 1994

TM-9-2350-311-20-1 - Page 937 of 1275

TM 9-2350-311 -20-1

10-8 TRACK TENSION —

CONTINUED

b. Adjusting

CAUTIO N

Do not allow track adjuster to extend more than 3.5 in. (8.9 cm). Remove a shoe to

shorten track if necessary.

1 Clean input pressure fitting (3).

2 Add grease until distance from top of third road wheel (2) to bottom of track (1) is 0.25 in. (6.4 mm).

3 To increase track tension, raise track (1) away from third road wheel (2).

4 To decrease track tension, slowly loosen bleed plug (4).

5 Allow lubricant to escape until track (1) hangs loose.

6 Clean off excess lubricant.

7 Tighten bleed plug (4).

8 Adjust track to desired tension. Increase track tension to achieve 0.25-in. (6.4-mm) measurement between

road wheel and track.

10-20