LAUNCH
Installation Instruction for Economical Symmetric Floor-plate 2-post Lift
16
Diagram of electrical system for Single-phase motor
AC500V,20A
switch prepared
by user
KM-AC Contactor
；
M-Motor
；
SB-Start button
Diagram of electrical system for three-phase motor
KM-AC Contactor
；
M-Motor
；
SB-Start button
；
FR-Overheat Relay
The electrical working principle is as follows:
Press the start button (SB), and the contactor (KM) will be
closed; motor (M) is energized to drive the gear pump for oil
supply so as to push the carriage upward; release the start
button, and the contactor (KM) is open, then the motor (M)
will lose the power, so the carriage will stop lifting.
Diagram of hydraulic system
2
3
1
4
5
7
6
8
8
9
9
1 0
1 1
1-Gear pump, 2-motor, 3-oil filter, 4-check valve,
5-safety valve,6-manual lowering valve 7-Sevo flow –
control valve, 8-hose,,9-hydraulic cylinder, 10-level gauge,
11-air filter
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 10 forcing the piston move upward. At this time, the
safety vale 5 is at the “Closed” position. (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 operation. For lowering the carriage, first start up the
motor to raise the carriage a little, pull the steel ropes on the
two carriages to disengage the safety locking status; and
then press the manual lowering handle valve 6 to lower the
carriage.
