Owner's Manual Presto DXS Series - ECOA CDL & CLT Series
Page 9
voltage at motor terminals; again briefly operate the
lift. If the lift does not move smoothly with a humming
sound, stop and review the procedures in the section on
troubleshooting (5B).
3. After raising the lift completely, lower the lift. It should
move slowly and smoothly with a humming sound. If the lift
operates properly, raise and lower the lift and stop at differ-
ent levels to get a good perspective on the lift's operations
and movements.
S E C T I O N 4
OPERATION
A. METHOD OF OPERATION
All Double Scissor Lifts are provided with a special relief valve
and are factory preset for the maximum safe capacity of the
lift. Activating and holding the up switch will energize the mo-
tor. The motor is attached to a positive displacement pump,
that draws hydraulic fluid from the reservoir and transfers it
under pressure to the cylinder. This forces the piston forward
and the scissor legs to separate and raise the platform, releas-
ing the up button will stop the lift. A check valve between the
pump and piston holds the table in position. Depressing and
holding the down switch will energize a solenoid, that allows
the oil from the cylinder to return to the reservoir through a
preset flow control. This allows the lift to lower smoothly and
at a controlled speed.
NOTICE
Do not attempt to change the setting on the pressure
relief valve. Do not maintain the up or down button en-
ergized if the lift fails to move or after it has reached its
up or down limits. This will cause damage to the pump
and controls.
B. OPERATING INSTRUCTIONS
In order to operate the lift follow these operating procedures.
Read and understand all the instructions before operating. If
the lift has modifications or accessories, read and understand
their functions.
1). Load the lift correctly.
Portable lifts:
Place the load on the center of the table top.
The load center of gravity must be within 6'' of the lift table
top center and equally distributed over 80% of the table.
Stationary lifts:
Place the load on the center of the table
top. The load center of gravity must be within 8' of the lift
table top and equally distributed over 80% of the table.
If the load is unstable or may become unstable, fasten it
into position.
2). Operate the lift.
a) To raise the lift, press and hold the up button.
b) To lower the lift, press and hold the down button.
c) Release the button to stop the lift.
3). Wait until the lift has come to a complete stop before
unloading the lift.
4). Stand clear of lift when operating it in order to avoid injury.
WARNING!
a).
Do not stand, sit or climb onto the lift.
b). Do not load or unload a moving lift.
c). If the lift fails to move or exhibits strange movements
or sound, stop immediately. Do not operate the lift
until it has been checked and repaired.
d). Read, understand and obey all warning labels.
e). Do not exceed maximum rated load.
f). Maintain load, center of gravity, within 6'' of the center
of the portable lift and 8'' for stationary lifts.
