Cattini Oleopneumatica YAK 300 Manual Uso Y Mantenimiento página 16

Then clean the valve seats by removing the cap
.
A00413 A00413
- The ball 20 - A00413 20 - A00413
THE PISTONS FAIL TO GO BACK IN COMPLETELY EVEN WITH THE CONTROLS IN THE
LOWERING POSITION
- Check that the vacuum pump contained in the part
A00438 A00438 and operate the lowering controls with the distributor connected to the air circuit, checking whether a vacuum
is generated by keeping a finger over the coupling.
HYDRAULIC FLUID LEAKS
- Check the quantity of hydraulic fluid in the tank (see procedure "Checking the hydraulic fluid level" in the
"maintenance operations to be performed by the user" section). If too much oil has been added to the jack, the leak
will stop after a short time.
- Check that the jack has been used according to the previously specified conditions, in other words in a horizontal
position and not tilted. If the jack has been turned over or tipped up, the leak will stop after a short time.
- Check that the pumping element
- Check that the seals on the motor pump assembly are not damaged. If they are, replace them (kit KMYAK300).
THE PISTONS RAISE VERY SLOWLY
- Check that the cock POS. 9 GRP1SOL POS. 9 GRP1SOL
16
18 - A00413 18 - A00413
could be dirty: remove the components
12 A00413 12 A00413 is not scored or otherwise damaged. If it is, replace it.
between the tank and the motor pump is open.
and removing the components
21-27 - A00413 21-27 - A00413
4 - A00438 4 - A00438 is working correctly. Remove the hose
14,15,16,17 - 14,15,16,17 -
and clean the ball.
3 - 3 -
EN