Section IV. Maintenance instructions
2-15.1 Maintenance concept
2-15.1.1 Unit level and Intermediate Direct Support/Intermediate General Support (IDS/IGS) maintenance on radio
communications system equipment is performed onboard by barge crew members whenever possible.
2-15.1.2 Any IDS/IGS maintenance beyond capability of crew members is provided by a shore-based area support
maintenance unit. This unit also determines if depot support maintenance is required.
2-15.1.3 Intermediate support maintenance is accomplished by replacement of components or major end items.
2-15.1.4 Unless other Intermediate support procedures are directed, IDS/IGS maintenance normally is provided by an
Army Transportation Corps floating craft intermediate support maintenance unit serving terminal operating area
Components to be disposed of are processed by this unit.
2-15.1 5 Maintenance Allocation Chart (MAC) is in TM 55-1930-209-14&P-18 For maintenance of other equipment
onboard, consult appropriate manual.
2-15.2 Maintenance instructions. Maintenance instructions are presented in paragraphs 2-16, Preventive
maintenance checks and services, Appendix C, Troubleshooting, and 2-18, Maintenance procedures.
2-16 Preventive maintenance checks and services. See TM 55-1930-209-14&P-12, Appendix C for preventive
maintenance checks and services for the communications system. See TM 55-1930-209-14&P-19 for complete
preventive maintenance checks and services for all ROWPU Barge Systems.
2-17.1 Army radio. Perform troubleshooting in TM 11-5820-401-10-1, TM 11-5820-401-20-1, and TM 11-6130-233-12
2-17.2 Commercial marine radios. Troubleshoot commercial marine radio as given in Table 2-3. Additional
troubleshooting is in manufacturer's service manual/instructions listed in Section VI and contained in Appendix B Table 2-
3 lists only common malfunctions that may occur during operation if a malfunction occurs that is not listed and the cause
is not readily apparent, request IDS/IGS maintenance assistance.
2-17.3 Walkie-talkies. Troubleshoot walkie-talkies as given in Table 2-4.
2-18 General maintenance. Maintenance for the system consists of disassembling, repairing/replacing, and
reassembling items listed in the Repair Parts List in TM 55-1930-209-14&P-18. When performing maintenance, be sure
to observe precautions listed in manufacturer's manuals/instructions and the following:
Always use new seals and gaskets, same as original, before reassembling components that have been
disassembled for repair. Carefully install so as not to damage during assembly.
When replacing gaskets, make sure mating surfaces are clean and free of old gasket material, adhesive, oil, or
grease. These precautions will ensure a leak-proof joint.
When replacing O-rings, make sure all surfaces are clean and free of dirt, grit or foreign material. Prior to
installation, apply a thin coat of silicone grease to O-ring for ease of assembly. Protect O-rings by applying tape
over threads, sharp corners and edges of components in which the O-ring will be placed.