TM 55-4920-438-13&P
SECTION III. PRINCIPLES OF OPERATION
1-8. After the shelter has been erected, the operator personnel will unbolt selected items of equipment. These items will
be relocated to preselected positions on the expanded side of the shelter. (See para.,1-7c.,d.). The selected items,
when moved, will not be secured (bolted) in place. This allows the shop personnel a certain flexibility in the event long or
bulky materiel must be repaired within the shelter. The recommended locations were selected for the proper utilization of
floor space and maximum safety for the operating personnel.
Four people are needed when moving or lifting the Environmental Control Units (ECUs). Each
unit weighs approximately 270 pounds. Trying to move or lift an ECU without help can cause
serious injury to personnel.
1-9. The two ECUs are positioned on special fold down shelves, when the shop is in the operational mode. Power is
provided by a 208V cable located inside the shelter next to each shelf. Both ECUs can be easily removed for service or
repair.
1-10. Detailed instructions for unbolting equipment and the recommended sequence for relocation is contained in
Chapter 2, Section II. The procedures for striking the shelter and preparing the Power Train Shop for transport or storage
are contained in Chapter 2, Section III.
1-11. Electrical power to operate the Power Train Shop is provided by an auxiliary generator or a commercial power
source. A power distribution panel (PDP) is used between the power source and the power entry panel of the shelter.
Overload protection is by circuit breaker. The circuit breaker panel is located inside the shelter next to the personnel
entrance door.
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