YATO YT-17211, Instructions Manual

Page: 10 / 36

10
EN
O R I G I N A L I N S T R U C T I O N S
Solution of problems
The lift lowers under
a load
The lift does
not lift a load
The lift does not
lift a load to the full
height
The pump springs
back during lifting
The lift does not
lower completely
Oil is leaking from
under the plug
X X X
There may be insu ffi cient quantity of oil
in the lift. Fill the oil tank.
X X X X
Air in the hydraulic system. Purge the
hydraulic system.
X
There may be excessive quantity of oil
in the lift. Remove the excess of oil
X X
The valves may not close completely.
Lift the arm of the device a couple
of times without any load and then
lower it.
X
A damaged back spring.
Moving elements are not lubricated.
Deformed arm driving elements.
X X
The release valve is not completely
closed. Close the release valve.
Replacement of the back spring in the powered lifts
It is required to have the following maintenance action realised in a specialised service point.
Lower the saddle of the lift, so that the back spring is as little stretched as possible. Using a tool remove the damaged spring from
the holes and replace it with a new one. Check the functioning of the lift.