36
September 2020
Installation, Operation and Maintenance Manual
MAN 571_EAC Rev. 1
Maintenance
Section 5: Maintenance
5.1.1
Check and Restore Oil Level in the Gas-Hydraulic Tanks
•
Bring a
ctuator i
n position of complete opening or closing.
•
Wait for a few minutes before checking.
•
Check
oil level with the special level sticks placed on top of gas-hydraulic tanks
(Figure 33).
•
Add
oil (Table 6) if in one tanks the level is BELOW MINIMUM and at the same time in
the other tank it is BELOW MAXIMUM (Figure 32).
!
WARNING
Oil level should not be ABOVE MINIMUM in one tank and at the same time ABOVE MAXIMUM
in the other one.
If in one tank level is BELOW MINIMUM and at the same time in the other tank it is ABOVE
MAXIMUM or the other way round there is an unbalance of oil levels in the tanks. In this
case follow these steps:
•
Bring actuator to half angular stroke - 45°.
•
Position distributor in “by-pass”.
•
Operate the lever of the hydraulic pump to balance the oil levels of two tanks.
•
Check that the level is restored with the special measuring sticks.
•
Bring distributor back to previous position.
NOTICE
Do not leave the distributor in the By-pass position. For refill use oil of the same brand as the
one in the tanks, refer to related technical documentation.
