Section
6.
Planned Maintenance
Checking
the
Hydraulic
Fluid
Check
the
hydraulic sump tank
fluid level. Correct fluid level
is
important
for
proper system
op-
eration.
Low
fluid level
can
cause
pump
damage.
Hydraulic fluid expands
as
its
tem-
perature rises. Therefore,
it is
pref-
erable
to
check
the
fluid level
at
operating
temperature
(after
ap-
proximately
30
minutes
of
truck
operation).
The
NPR
truck requires
a
visual check
of the
fluid reservoir.
To
check
the
fluid level
you
must
open
the
left
door.
You
should have
a
trained
and
authorized mechanic
check
the
fluid
level
for
you.
Do not
overfill.
Check
the
condition
of the
hydraulic fluid (age,
contamination).
Change
(replace)
the oil as
necessary.
Critical Fastener Checks
Fasteners
in
highly loaded (critical) components
can
quickly fail
if
they
become loosened. Also, loose fasteners
can
cause damage
or
failure
of
the
component.
For
safety,
it is
important that
the
correct torque
be
maintained
on all
critical fasteners
of
components that directly support,
handle,
or
control
the
load
and
protect
the
operator.
Check
critical items, including:
•
Overhead
guard
•
Drive wheel mounting
•
Upright mounting
&
components
Pump
Motor
Mounting
Lift
Limit Switch Mounting
Load backrest extension
Checking Hydraulic Fluid
•
Critical Fastener Checks 6-21
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