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2)
Compressor
Water
leak
check
methods
for
other
waterproofed
locations,
In addition
to
water
leaks
caused
by
damaged
parts
and
loose
screws,
there
are
also
water
leaks
at other
waterproofed
locations
which
cannot
be detected
with
a water
leak
test: therefore, the hydraulic
pressure
test
must
be used.
* Hydraulic
pressure
test
In this test, Marine
Pack
is immersed
in a water
tank
called a hydraulic
pressure
vessel, pressure
is applied
using compressed
air and
checks
are
made
for water
leaks
and
the ability
to withstand
water
pressure
is
tested,
Extreme
pressure
is
applied
to
Marine
Pack
underwater.
Water
leaks may
occur
when
this pressure
is first applied. In such cases, the water
leak check
must
be made
using the hydraulic
pressure
test with
a hydraulic
pressure
vessel,
Marine
Pack
Hydraulic
pressure
vessel
Water
2)
3)
4)
5)
6)
7)
8)
9)
Causes
1)-5)
Causes
of Water
Leaks
(excluding
parts
damage)
Water
leaks
in openings
When
the covers
have
been
closed
with
sand, dirt and
hair
adhered
to the O-rings, O-ring
grooves,
housing
O-
ring
contact
surface
or
waterproof
packing.
When
the
cover
is closed
with
an
O-ring
out
of
its
groove
or
a cord-is
caught
in the
cover,
When
an
O-ring
is damaged
or
cracked
(aging).
When
there
is a long scratch
which
crosses
the housing
O-ring
contact
surface,
When
a cover
is not
tightly
closed
due
to a defective
buckle.
Water
leaks
at other
waterproofed
locations
When
there are scratches on the surfaces of the parts
which
compress
the
O-rings,
When
the Parts
which
compress
are loose,
When
tightening
with
sand, dirt
and
hair
adhered
to
an O-ring or part which
compresses
the O-ring.
When
an O-ring has not been
installed.
and
9)
above
can
be
discovered
relatively
easily
using
the
water
leak
test
described
above,
5.
1)
2)
3)
4)
1)
2)
3)
Water
Leak
Repair
Methods
Relatively
light scratches
on
O-ring
contact
surfaces
can
often
by repaired
by polishing.
Caution
should
be exercised
concerning
the following
points,
Only
extermely
light scratches
can
be repaired.
Use
number
600-1000
waterproof
sandpaper
for repairs
and
apply
water
while
polishing.
Polish the scratch
area smoothly
using care not to create
local indentations,
Do
not
use
putty
to
make
repairs
since
such
repairs
will
fail under
water
pressure,
Checks
and
cautions
Make
sure
that
there
are
no scratches:on
the housing
O-ring
contact
surfaces,
Make
sure
that there are no scratches
or cracks
in the
O-rings.
Always
coat the O-rings with grease
by hand and
make
sure
that the O-rings
are not
twisted
when
installed,
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