YATO YT-17214 Manual De Instrucciones página 9

Insert the arm of the lift into the socket. Moving the arm upwards and downwards lift the load to the required height.
Once the load has been lifted, protect it from falling down using for example appropriate supports.
Lowering
Before lowering of the load may commence, make sure that the load to be lowered will not cause any injuries to the personnel.
Using the narrower end of the arm of the lift turn the release valve slowly anticlockwise. Do not open the release valve more
than this is required to slowly lower the load.
Excessive opening of the valve may cause its removing from the casing.
Once the load has been completely lowered, disconnect the arm from the lift, and remove the lift from under the load. In case of
post lifts, it is required to remove the extension bolt, if it was used.
Maintenance
If the lift is not used the shaft of the lift and the socket of the arm should be in the lower position. In case of post lifts also the exten-
sion bolt should be turned into the shaft of the lift. This will prevent the surface of the shaft from corrosion.
The lift must be kept clean, and the external moving elements of the lift must be lubricated at least every ten working hours.
Purging the hydraulic system
It is required to have the following maintenance action realised in a specialised service point.
From time to time the hydraulic system of the lift fi lls with air bubbles. This may impair the functional effi ciency of the lift. If this is
the case the hydraulic system of the lift must be purged.
Place the lift in such a manner that the shaft is in a vertical position. Open the release valve and remove the oil tank plug (V). Then
move the pump of the lift energetically a couple of times so as to remove the air.
Close the release valve and replace the oil tank plug. Check the functioning of the lift, and if necessary repeat the purging procedure.
Filling the oil tank and lubrication
It is required to have the following maintenance action realised in a specialised service point.
Place the lift in such a manner that the shaft is in a vertical position. Move the pump and the shaft to the extreme lower position.
Remove the oil tank plug (V).
Use solely hydraulic oil whose viscosity class is SAE 10. It is prohibited to use other liquids for that purpose. Fill the tank to the
lower edge of the oil inlet.
Purge the lift following the direction indicated in „ Purging the hydraulic system".
Replace the oil tank plug. Check the functioning of the lift.
In regular intervals (at least every ten working hours) lubricate the articulated connections and other moving elements of the lift.
In case of post lifts, remember of periodical lubrication of the extension bolt thread.
Solution of problems
The lift lowers under The lift does
a load not lift a load
X
X
X X
X X
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.
O R I G I N A L
The lift does not lift a The pump springs
load to the full height back during lifting
X X
X X
I N S T R U C T I O N S
GB
Oil is leaking
The lift does not
from under the
lower completely
plug
X
X
X
There may be insuffi cient quantity of oil in
the lift. Fill the oil tank.
Air in the hydraulic system. Purge the
hydraulic system.
There may be excessive quantity of oil in
the lift. Remove the excess of oil
The valves may not close completely. Lift
the arm of the device a couple of times
without any load and then lower it.
A damaged back spring. Moving elements
are not lubricated. Deformed arm driving
elements.
The release valve is not completely
closed. Close the release valve.
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