TM-9-2350-311-34-2 Maintenance Manual for Volume 2 M109 Cab Download
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TM 9-2350-311-34-2 ELECTRICAL CONTACT SEGMENT RING This task covers: Inspection and Repair INITIAL SETUP Tools Metal bar (copper) (item 8, Appx B) Artillery and turret mechanic’s tool kit (SC 5180-95CL-A12) References Artillery field maintenance tool kit TM 9-2350-311-20-2 SC 4933-95-CL-A06) Equipment Condition Materials/Parts Vehicle MASTER switch to OFF (TM 9-2350-311-10) Adhesive (item 2, Appx B) CAB POWER switch to OFF (TM 9-2350-311-10) Epoxy adhesive (item 3, Appx B) Batteries disconnected (TM 9-2350-311-10) Inspection and Repair Personnel must wear safety glasses to avoid eye injury. NOTE See TM 9-2350-311-20-2 for removal and installation of electrical contact segment ring. Vehicles with three contact arm assemblies have an electrical contact segment ring consisting of two ring segments. Vehicles with five contact arm assemblies have one ring segment. Bus bars are the two wide polished metal contact strips on ring segment(s). Be careful not to damage polished metal surfaces on contact strips. 1 Clean bus bars (1) of ring segment(s) (2) with wire brush. Clean narrow polished metal contact strips (3). Adhesives can burn easily, can give off harmful vapors, and are harmful to skin and clothing. To avoid injury or death, keep away from open fire and use in well-ventilated area. If adhesive gets on skin or clothing, wash immediately with soap and water. 2 Inspect ring segment(s) (2) for cracks. Repair cracks with epoxy adhesive. 3 Inspect bus bars (1) and narrow polished metal contact strips (3) for looseness. Bond loose bus bars or nar- row polished metal contact strips to ring segment(s) (2) with epoxy adhesive. 8-2