24
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P a g e
PINBOX
MAINTENANCE
Regularly
inspect
the
king
pin
for
excessive
wear.
Inspect
the
skid
plate
for
a
neutral/centered
position.
When
the
trailer
is
disconnected
from
the
tow
vehicle,
an
equal
gap
of
approximately
1
‐
1/4”
should
be
between
the
lip
of
the
skid
pad
and
the
rubber
compression
bumpers.
It
is
normal
to
be
able
to
slightly
move
and
twist
the
skid
pad
assembly
with
hand
force.
Inspect
the
retainment
rods
for
excessive
wear.
Inspect
the
plastic
glide
pads
for
excessive
wear.
The
pad
should
be
no
less
than
¾”
Periodically
check
hardware
torque
values.
Check
and
grease
bearing(s)
once
per
season.
If
more
grease
is
needed,
add
it
to
the
bearing
assembly.
DO
NOT
MIX
LITHIUM,
CALCIUM,
SODIUM
OR
BARIUM
COMPLEX
GREASES.
MIXING
OF
THESE
CAN
CREATE
A
CORROSIVE
TOXIC
CHEMICAL
WITH
FUMES
THAT
CAN
RESULT
IN
SERIOUS
HEALTH
ISSUES.