TM-9-2350-358-BD M109A6 Battlefield Damage Assessment and Repair Download
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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