Cattini Oleopneumatica YAK 2120X, Operating And Maintenance Manual

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3. Loosen (NEVER unscrew it completely!) the grub screw on the cylinder head, POS. 45 A00383 POS. 45 A00383 , letting all the air
flow out from the grub screw; when hydraulic fluid starts to flow out, tighten the grub screw again. If necessary,
push the piston back in by hand.
4. Push the pistons all the way back in and check the fluid level.
5. Try operating the jack without any load; if the piston does not lower smoothly, repeat the procedure at least 2 or 3
times.
MAINTENANCE OPERATIONS TO BE PERFORMED ONLY BY A
QUALIFIED TECHNICIAN
When maintenance or an overhaul of the jack is required, use only genuine spare parts to ensure the utmost reliability for
the jack.
Before performing any maintenance on the jack, retract the pistons fully and disconnect the jack from the air circuit.
If it is necessary to perform maintenance on or replace the manual pump, it is possible to remove the manual pump from
the jack without having to drain the hydraulic fluid from the tank or the pistons.
To perform this operation, screw in the screw D
(DWG. 5) , and remove the retaining screws
POS. 5 - A00587 POS. 5 - A00587
. At this
point it will be possible to remove, and if necessary replace, the manual pump A00475 A00475 .
Once the repair has been performed and the manual pump reinstalled, unscrew screw D, DWG. 5 , again.
It may be necessary to bleed off excess air after performing this operation.
PROBLEMS
Solutions
THE PISTONS DO NOT RAISE WHEN YOU PRESS THE RAPID RAISING BUTTON
- Ensure that there are no kinks or blockages in the air supply line, and that the pressure in the circuit is at least 8 bar.
- Check that the cock
POS. 27 A00383 POS. 27 A00383 is open.
THE JACK DOES NOT LIFT THE LOAD
- Check the hydraulic fluid level.
- Check that the closing device
POS. 35 A00475 POS. 35 A00475 is correctly tightened.
THE JACK LIFTS, BUT COMES DOWN UNDER THE LOAD
- Check that the closing device POS. 35 A00475 POS. 35 A00475 is correctly tightened.
THE PISTONS FAIL TO RETRACT COMPLETELY EVEN WHEN OPERATING THE
LOWERING DEVICE
- The jack with manual pump has no automatic retraction system for the pistons. Guide the pistons back in manually.
EN
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