TM 55-1930-209-14&P-13
3-14
Bow crane shutdown procedures
CAUTION
To avoid damage to bow crane and its hydraulic control system, always return bow crane
to its traveling (folded) position for storage and travel.
a.
Draw back extension boom to its innermost position.
b.
Fold outer boom in position under inner boom.
c.
Swing lower boom into pedestal tunnel and pull up until pulley wheel touches pedestal (Figure 3-1).
d.
In watertight control box,
(1)
Press STOP button on START/STOP control station (Figure 3-6).
(2)
Set anti-2-block HORN ON/OFF switch to OFF (Figure 3-6).
(3)
Close and secure box.
e.
In void 1, on hydraulic pump controller, turn HAND/OFF/AUTO (Figure 3-4) switch to OFF and pull down top
switch.
NOTE
If bow crane is left in unfolded position, apply a light coat of grease or hydraulic fluid to
all exposed chromium plated parts of crane hydraulic cylinders. Wipe this coating clean
before using the crane. If crane must be left in this position, exercise it daily.
f.
After shutting down, perform after operation checks listed in Appendix C.
3-15
Operation under extreme conditions. Operating the bow crane in extreme hot or cold temperatures creates a
special problem with lubricants. These temperatures may cause the crane to raise, lower, or turn at a slower or faster
rate.
Problems occur especially during operation in extremely cold temperatures because of greater pressure on hydraulic
seals. Check these seals frequently during cold weather operation.
Section IV. Maintenance instructions
3-16
General. When bow crane components are inspected, give special attention to pulleys, lifting hooks, slings, and
other load-bearing components. Also, carefully check hydraulic lines, their connections, and hydraulic seals. Give
particular attention to components that show evidence of hydraulic fluid leakage or severe corrosion. Keep inspection
reports and records on all hoist equipment. Required maintenance forms and records are explained in DA PAM 738750.
Due to bow crane strength considerations, repair or replace parts or components of the crane with items the same as the
original construction. Use materials in accordance with the drawings referenced in Appendix A.
CAUTION
Notify IDS/IGS maintenance unit after repairing or replacing parts on any slings used on
the barge. They must proof test the repaired item in accordance with American Society
of Testing and Material Specification A 391-65 and US Army procedures. In addition, all
slings and lifting devices must be proof tested to these standards every 12 months.
Record and maintain certification of all proof testing.
3-16.1 Maintenance concept
3-16.1.1
Unit level and IDS/IGS maintenance on the bow crane is performed onboard by barge crewmembers
whenever possible.
3-15
