Southworth APCU Series, Operating And Maintenance Manual

Page: 29 / 46

APCU Owner’s Manual 29
Routine Maintenance - Monthly
•
On the tilt and dump mechanisms, inspect the main
pivot pins and bushings and the cylinder clevis pins
and bushings for signs of wear.
WARNING!
If you are going to repair the main pivot
pins and bushings on either the tilt or
dump mechanisms, you must return the
load enclosure to the loading position.
• Check the level and appearance of the hydraulic
fluid. When the load enclosure is fully lowered,
the oil should be at the correct level as viewed
through the sight glass on the reservoir. Add oil as
necessary. Change the oil and filter if the oil has
darkened, or feels gritty or sticky.
Routine Maintenance - Every six months or
500 hours of operation, whichever comes
first:
• The hydraulic system includes a replaceable oil filter.
Replace this filter as part of your routine mainte -
nance. Inspect the oil, and replace it if necessary.
If the oil is changed, thoroughly clean the reservoir,
including the suction strainer.
• Be sure all of the warning labels are in position
and legible. See Fig. 3. The warning labels are
intended to protect your workers. If the labels are
missing, or if they have been painted over, replace
them.
Troubleshooting
All servicing should be done by qualified personnel.
Qualified personnel should be able to read and under
-
stand wiring and hydraulic diagrams. They should be
able to troubleshoot live electrical circuits safely and
in accordance with accepted practice.
For safety’s
sake , if in doubt, please contact Southworth Products
Corporation at (207) 878-0700.
Before servicing the unit, read and understand this
entire section and the section entitled “Operating In-
structions.”
WARNING!
Before working under any raised parts of
the unit, always lower the load enclosure
to the floor. This will support the parts of
the unit and relieve any hydraulic pressure
in the system. If you do not do this, and
attempt to work on the unit, you may be
badly hurt and the unit may be damaged.
This unit has two lifting actions. Each of these lifting
actions is provided by a separate pair of lifting cylinders:
• 90° tilting action - inner cylinders
• 50° dumping action - outer cylinders
Both sets of cylinders are powered by the same hy-
draulic power unit.
As you troubleshoot the unit, notice whether just one of
the lift functions is not working, or all of the lift functions
are not working.
The retainage bar should be
inspected and maintained.
The safety yellow color will re-
quire painting periodically.