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 187 of 343

TM 9-2350-358-BD

8-11.

SPROCKET AND HUB ASSEMBLY BOLTS, SHEARED

General Information:

The sprocket and hub assembly is secured to the final drive hub with 8 bolts.

At least 4 of the 8 mounting bolts are

required to remount the sprocket and hub assembly.

If the sprocket and hub assembly is remounted with a reduced

number of bolts, the bolts should be spaced evenly.

If these bolts come loose, they will wear and eventually shear off

causing the sprocket, hub assembly, and track to drop off.

Option 1:

Substitute bolts.

Limitations:

Reduced mobility.

Personnel/Time Required:

•

3 soldiers

•

3.0 hours

Materials/Tools:

•

Vice-grips

•

Hammer

•

Chisel

•

4 each hub bolts (scavenged from available source)

References:

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

Procedural Steps:

1.

Break track.

2.

Remove broken final drive hub bolts.

3.

Remount the sprocket and hub assembly with replacement or remaining bolts (minimum of four).

8-7