L a u n c h T L T 2 6 0 A T T w o - p o s t l i f t u s e r ’ s m a n u a l
4
4 Hydraulic and Electrical System of the Equipment
4.1 Electrical System of the Lift
AC500V20A
protective switch
for power needs
to be prepared by
customer
M–Motor KM–Contactor SB1–Emergency Stop Switch
SB2–Button SQ–Limit switch T–Transformer
Diagram of single-phase motor
AC500V20A
protective switch
for power needs to
be prepared by
customer
M–Motor KM–Contactor SB1–Emergency Stop
Switch SB2–Button SQ–Limit switch T–Transformer
Diagram of three phase motor
The electrical working principle is as follows:
Press the start button (SB), motor (M) is energized to drive the gear pump supplying oil to push the carriage upward; release
the start button
SB
, the motor (M) will lose the power and the carriage will stop rising. if the vehicle is lifted up to the top and
contacts the limit switch (SQ) on the top beam, the motor (M) will lose the power, the carriage will stop lifting to protect the
roof.
4.2 Electrical System of the Lift
Diagram of hydraulic system:
Working principles of hydraulic system:
When the button is pressed to start the motor on the
power unit, the motor 2 will be actuated to put the oil pump
1 into motion; and oil will be sucked from the oil tank and
sent to cylinder 9 forcing the piston move upward. At this
time, the safety vale 5 is closed. (The pressure is well
adjusted before leaving the factory to ensure the rated
capacity. However, when the system pressure exceeds the
limit, the oil will automatically overflow). When the start
button is released, the oil supply will stop so as to stop the
lifting. For lowering the carriage, first start up the motor to
raise the carriage a little, pull the safety lock handle on the
column to disengage the safety locking status; and then
press the manual lowering handle valve 6 to lower the
carriage.