12
5. Safety Devices
Lowering stop
hook
They are installed at each cylinder to
prevent lift from falling in case of oil
leaking and breakage of hydraulic hoses
etc.
However, please note that there is no
lowering stop hook below approx. 500
mm from bottom.
Fuse valve
(Shutoff valves)
It is installed at each cylinder.
It would shut off the oil flow in case
sudden flow of oil from cylinder due to the
breakage of hydraulic circuit etc.
Relief valve
In case of below, it would work to prevent
lift from break
a. lifting heavier load than lift’s capacity
b. lift is reaching the top
c. pressure in hydraulic line increases
due to the trouble for any reason
It is installed inside of gear pump.
Thermal relay
It would sense the excessive electric
current and shut off the circuit and protect
electric components.
It is installed at magnetic switch.
Fuse
valves
Relief
valve
Thermal
relay
