TM-9-2350-358-BD

HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A6

TECHNICAL MANUAL; OPERATOR’S, UNIT, AND DIRECT SUPPORT SUPPORT MAINTENANCE

MARCH 1994

TM-9-2350-358-BD - Page 207 of 343

TM 9-2350-358-BD

10-9.

TORSION BAR, BROKEN - CONTINUED

4.

Remove roadwheels.

5.

Remove broken torsion bar.

6.

Tie up disabled roadwheel arm (para 10-5).

7.

Reconnect track.

8.

Record the BDAR action taken.

When mission is complete, as soon as practical, repair the equipment/system

using standard maintenance procedures.

SECTION IV.

TRACK ADJUSTER

/

IDLER WHEEL ASSEMBLY

10-10. GENERAL

The track adjuster and idler wheels are used to provide the tension to the track.

The idler bearing unit housing provide the

hub for the inner and outer idler wheels to rotate on.

If damaged, tension on the track will be lost.

Mobility can be restored

by short tracking to the number 7 roadwheel position, which will require the removal of track shoes to provide limited track

tension.

10-11. TRACK ADJUSTER, DAMAGED

General Information:

Damage to the track adjuster will probably include damage to the idler wheels.

Whether damaged or not, this procedure

will allow mobility to be restored to the vehicle.

Option 1:

Fix damaged track adjuster.

Limitations:

•

Steering capability nay be degraded.

•

Reduced speed.

Personnel/Time Required:

•

2 soldiers

•

1.5 hours

Materials/Tools:

•

Chain hoist

•

Welding equipment

References:

TM 9-2350-314-20-1-2

Procedural Steps:

1.

Remove fender on damaged side.

2.

Connect chain hoist between stowage basket hinge and bracket on idler arm.

10-9