procedure, comply with all the procedures specified by
the PMS.
complete system. Remember that with any electrical
problem, you will need the help of an Electricians Mate,
who is fully trained for electrical work
CONVEYORS
The two types of conveyors the Navy uses for
shipboard handling are gravity and powered. This
section will deal with the general concepts of
maintaining, troubleshooting, and repairing the
conveyors within ships force capability. When working
on a conveyor, always follow the manufacturers
manual or the PMS. For more general information
concerning conveyors, read NSTM, Chapter 572,
Shipboard Stores and Provision Handling. Figures
8-7, 8-8, and 8-9 are examples of some conveyors the
Navy uses.
The difficulties most likely to be encountered
during the operation of powered conveyors are not due
to a malfunctioning of the mechanical equipment, but to
the electrical equipment and the related interlocks. The
following list contains common conveyor troubles that
you may experience, the probable causes, and remedies
for each of the troubles listed. The cause for improper
operation is best diagnosed with adequate testing
equipment and a thorough understanding of the
Trouble
Conveyor will
not start.
Conveyor will
not hoist.
Conveyor will
not lower.
Conveyor runs
continuously
when set at
INDEX.
Probable Cause Solution
Power fails.
Determine and
correct cause of
power failure.
Main line fuse is Replace fuse.
blown.
Selector switch
Check and reset
or switches are
selector switches.
improperly set.
Selector switch
Check and reset
or switches are
selector switches.
improperly set.
Loading/unload- Reposition
ing platform is
platform in
set in horizontal
either stowed or
position.
decline position.
Limit switch is
Adjust limit
inoperative.
switch to actuate
when bell crank
passes.
Figure 8-7.Gravity conveyor.
8-14
