Southworth LS Serie El Manual Del Propietario página 16

the platform, raise the lift and insert the maintenance
devices, as shown in Figure 1. Do this every time you
work under the lift!
WARNINGS
• Do not change the setting on the relief valve. If you
do change the setting, this may cause a hydraulic
part to fail. The lift may drop suddenly. Someone may
be hurt, and the lift and the load may be damaged.
The hydraulic parts in the lift are designed to handle
a certain amount of pressure. The relief valve is set
to relieve this pressure before it becomes too great.
The relief valve has been included for the protection
of all of the workers who use the lift.
• Release of fluids under high pressure can cause
personal injury. Before you open any part of the
hydraulic system, be sure to release the hydraulic
pressure, see page 7, item 5.
• The warning labels on the lift are there for the safety
of the operators. See Figures 7 and 8. If the labels are
worn or missing, or have been painted over, replace
them before releasing the lift for operation.
If the lift will not raise:
Do not continue to hold the "up" button for more
than 2 or 3 seconds. You may damage the pump.
WARNING!
Do not change the relief valve setting. This valve
has been included for the protection of workers
who install, use, or service the lift. If it is ever
necessary to repair or reset the valve, contact
Southworth Products Corp. for instructions.
WARNING!
It maybe necessary to electrically by-pass the up
limit switch to place the lift on the chocks. Ensure
that doing so will not operate the switch beyond
its arms physical limits. This needs to be done by
TROUBLESHOOTING WARNINGS
All servicing should be done by qualified personnel.
Qualified personnel should be able to read and
understand 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 your dealer or
Southworth Products Corp. Before servicing the lift, read
and understand this entire section and the section
entitled "Operating Instructions."
WARNING!
Before working underneath the lift, always raise
the lift and insert the maintenance devices, as
shown in Figure 1. Failure to do so may result
in damage to the lift and severe personal injury!
16
Southworth Owner's Manual -- LS Series
NOTICE
qualified maintenance personnel. If electrical by-
pass is not possible the up limit switch needs to be
moved in order to place the unit on the maintenance
devices, then the lift platform and legs will need to be
supported before working on the switch, support the
top and leg sets with a crane, fork truck or blocking
from the floor to table top. Ensure switch is properly
reinstalled any any electrical by-pass is removed
before operating the lift. Any final adjustment of limit
switch needs to occur with the legset and platform
supported whil working under the lift. If you do by-
pass or remove the switch, when the lift platform
moves up, it may not stop at the correct point. If the
platform rises above the normal stopping point, the
frame of the unit may be damaged. People working
nearby may be hurt.
If cavitation is allowed to continue, the pump may be
damaged, and may have to be replaced.
If the lift elevates, but fails to hold a load:
Failure to insert the maintenance devices may
result in damage to the lift and severe personal
injury!
If the lift fails to lower:
Failure to insert the maintenance devices may
result in damage to the lift and severe personal
injury!
Do not try to adjust the flow control while pressing
the "down" button. If you try this, the lift table may
drop suddenly, and you may be hurt.
Cylinder
Down speed
control
Roller
Nameplate
NOTICE
WARNING!
WARNING!
DANGER!
Upper hinge
pin
and bushing
Center
scissor
pin
and
bushing