CHAPTER 13 HANDLING EQUIPMENT PMCS
Section I. General system Information
13-1 Introduction. Chapter 13 contains Preventive Maintenance Checks and Services for the Reverse Osmosis Water
Purification Barges. Operating and maintenance procedures for the handling equipment are described in detail in TM 55-
1930-209-14&P-13. TM 55-1930-209-14&P-13, Appendix C also contains complete Preventive L Maintenance Checks
and Services for Handing Equipment.
13-2 Major components. Handling equipment for the ROWPU Barge consists of a bridge crane, bow crane, and trolley
hoist. Refer to Appendix A of TM 55-1930-209-14&P-20 for the Components of End Items List for this equipment.
13-3 Handling equipment description. The handling equipment is used for lifting, transporting, and repositioning
equipment and materials onboard the barge. This system includes a bridge crane, bow crane, and void 4 trolley hoist.
The bridge crane is installed in the reverse osmosis water purification unit (ROWPU) space, bow crane on the forward
weatherdeck, and the trolley hoist in void 4 starboard. The bridge crane is used also to load and off load supplies and
equipment through the deckhouse starboard sliding door. The bow crane is used primarily to unload and load the
workboat from the deckhouse top and to load and unload the shore winch from its carrying position in front of the bow
crane on the forward weatherdeck. The trolley hoist is used to lift or reposition equipment in void 4.
13-3.1 Bridge crane system. The bridge crane system, in the ROWPU space, lifts and transports heavy equipment and
materials, such as diesel generators and 55-gallon drums. The bridge crane is also used for loading and unloading
equipment and materials through the deckhouse starboard sliding door. Bridge crane major components (Figure 13-1)
include: two 5-ton capacity, motor-driven, overhead cranes with end truck assemblies; a manual, chain-operated, geared
trolley hoist; a cable reel located midway each system and an "I" beam rail system. The "I" beam rail system, over which
the cranes move, is suspended from the deckhouse structure by a series of support posts. Two crossover members
located between the port and starboard bridge cranes provide for transfer of the geared trolley hoist. A four-button, hand-
held electrical control is used for controlling fore and aft crane movement. Electric power is provided to the crane
through a cable that is extended or retracted by the cable reel as the crane moves forward or aft. Additionally, a 2-ton
electric hoist provides for lifting lighter loads. A jib rail provides a method for moving suspended loads through the barge
sliding door. The bridge crane system installation is shown on drawings listed in Appendix A.
13-3.2 Bow crane system. The bow crane is a hydraulically operated articulating boom crane with a maximum
outreach of approximately 47 feet. Maximum lift capacity at this extension is 2,425 pounds. Maximum lift is 41,895 at
an outreach of only 6 feet, 7 inches. The crane is corrosion-proof and suitable for operation in a marine
environment. The crane has five major assemblies: crane body, inner boom, outer boom, mounting base, and
hydraulic control unit. When not in daily use, bow crane must be placed in its traveling (stowed) configuration