During the READY condition at 1-hour intervals,
check the accumulator pressure, accumulator and
gravity tank liquid levels, controller switch for
AUTOMATIC setting, and make sure the pump is not
operating when accumulator pressure is 1,500 psi or
above.
During the SECURE condition, make a daily check
of the accumulator pressure, accumulator and gravity
tank liquid level, valves for position (open or closed),
and controller switch for OFF setting.
The system must be operated WEEKLY to raise
and lower the stanchions, to vent air from both ends of
the hydraulic cylinders, and to check the operations of
the system. It is not necessary to attach the barricade
webbing during this exercise.
REVIEW QUESTIONS
Q7.
List the four differences between a pendant
engine and a barricade engine.
Q8.
What connects the upper and lower loads
straps to the barricade stanchions?
Q9.
When are the counterbalancing springs
compressed?
Q10.
What secures the barricade stanchions to the
deck?
Q11.
What
is
the
barricade
power
package
accumulator operating pressure?
Q12.
What are three positions of the motor
controller switch?
MAINTENANCE PROCEDURES
LEARNING OBJECTIVES: Describe the
procedures for replacing purchase cables.
Describe
the
procedures
for
replacing
packings.
Arresting gear must be kept ready for instant use.
There is only one way such a condition may be effected;
that is, by constant inspection, repair, and maintenance.
Preoperational and postoperational inspection of all
components is mandatory, as directed by the applicable
MRC. Every section, topside, below deck, engine areas,
and ready stowage must be prepared to function on
command.
Maintenance can be divided into two broad
categories: preventive maintenance and corrective
maintenance. Preventive maintenance consists of
routine shipboard procedures designed to increase the
effective life of equipment or to forewarn of impending
troubles. Corrective maintenance includes procedures
designed to analyze and correct material defects and
troubles. The main objective of shipboard preventive
maintenance
is
the
prevention
of
breakdown,
deterioration, and malfunction of equipment. If,
however, this objective is not reached, the alternative
objective
of
repairing
or
replacing
failed
equipment—corrective
maintenance—must
be
accomplished.
Maintenance by the arresting gear crew must go
beyond a wipedown and periodic lubrication. The
arresting gear personnel must be instructed to alert the
officer in charge to any signs of malfunction, wear,
looseness, leakage, damage, or any other irregular
conditions in the arresting gear equipment. They should
also learn the physical location of all operating parts,
cable runs, air supply lines, valves, electrical supply
lines, switches, fuse boxes, tools, and spare parts.
Engine inspection should be visual, mechanical,
and operational. The following general notes apply to
maintenance throughout the arresting gear equipment:
Mechanical inspection is performed while the
engine is at rest. It consists of a security check,
exercising the engine, and manipulating the
controls. This inspection is a check for
looseness, excessive play, improper operation of
hidden parts, lack of lubrication, or any
abnormal resistance to motion.
Operational inspection consists of running all
operable systems through a full cycle of
operation,
checking
for
smoothness
of
operation, proper timing, and synchronization.
All maintenance performed on recovery
equipment should be noted in the maintenance
log for that particular unit.
Changes in critical measurements should be
logged so that they can be used to predict trends
and avoid possible troubles.
Wipe down all arresting gear equipment daily to
remove dirt and grime.
Remove rust; paint when necessary.
Do not paint threads or finished machined
surfaces.
Check for loose or damaged bolts, nuts, and
screws.
Tighten
or
replace
as
required.
3-45
