CHAPTER 4 MAINTENANCE INSTRUCTIONS
4-1 Maintenance concept. Because EMS has solid-state electronic construction, system should remain trouble-free
with reasonable care. However, EMS is essentially a microprocessor with various sensors and it may become
unserviceable if any internal elements or sensing devices are damaged. If system requires maintenance beyond that
specified in paragraphs 4-5 through 4-18, Intermediate Direct Support/Intermediate General Support (IDS/IGS)
maintenance unit provides skilled electronics technicians to accomplish this work according to information provided in
manufacturer's manual In Appendix B, their knowledge of electronic microprocessors and sensors and, if necessary,
additional guidance received from manufacturer's technical representative.
41.1 Unit level maintenance on EMS equipment is performed onboard by barge crewmembers whenever possible.
4-1.2 IDS/IGS maintenance is provided by a shore-based area support maintenance unit. This unit also determines if
depot support maintenance is required.
4-1.3 Intermediate support maintenance is accomplished by replacement of components or major end items.
4-1.4 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.
4-1.5 Maintenance Allocation Chart (MAC) is in Appendix C of TM 55-1930-209-14&P-18. For maintenance of other
equipment onboard, consult appropriate manual 4-2 Maintenance Instructions. Maintenance instructions are presented in
the following sections: Appendix C, Preventive maintenance; paragraph 4-4, Troubleshooting; and paragraphs 4-5
through 4-18, Maintenance procedures.
4-3 Preventive maintenance checks and services. See TM 55-1930-209-14&P-11, Appendix C for preventive
maintenance checks and services for the equipment monitoring system. See TM 55-1930-20914&P-19 for complete
preventive maintenance checks and services for all systems on the ROWPU Barge.
Unit level troubleshooting procedures are In Table 4-1
Additional troubleshooting procedures for use by IDS/IGS maintenance unit are in PMS II Maintenance Manual In
Table 4-1. Troubleshooting Procedures
Electric Power not
Batteries not charged
Connect batteries or replace
20A fuse in battery charger
circuit 13P13 fuse box
Main power switch off or
Turn switch ON or test and repair or
replace switch (paragraph 4-11)
Replace batteries (paragraph 4-16)
Test and repair or replace battery
charger (paragraph 4-15)