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5.2.2.
Maintenance of the hydraulic units
Hydraulic system is shown in chapter 3.5.
•
Clean and lubricate piston rods of hydraulic cylinders.
•
Check the hydraulic valves:
Check visually hydraulic valves. In case of leaking replace the damaged valve.
•
Check hydraulic hoses:
Check visually hydraulic hoses and union pipe connections. Replace a hose in
case of leaking or if there are ruptures or slashes on it.
•
Check the level of oil, add and replace oil.
•
Check the operation of the device.
When replacing hydraulic components such as hoses, gaskets etc, make sure
they correspond with original parts. To avoid malfunctions and ensure safe operation
use original spare parts.
Changing the seals
Change all cylinder seals at the same time. The piston cannot be split. The
seals must be slipped over the piston edge. Be careful not to break the seals when
fitting them in place.
•
After removing the old seals clean the grooves carefully before fitting the new
seals into place.
•
Lubricate the new seals with hydraulic oil.
•
Open the pistons lock nut.
•
Screw the piston off.
•
Withdraw the guide piece from the rod.
•
Change the guide piece seals; make sure that the piston rod seal is the right
way round, i.e. the lip against the pressure.
NB: Never operate the hydraulic system with the level of oil dropping
below lower mark.
5.2.3.
Maintenance of the pneumatic units
•
Clean and lubricate piston rods of pneumatic cylinders.
•
Emptying the water collector:
Condensed water is removed from the air tank located in the side of trailer.
•
Check the pneumatic valves:
Check the pneumatic valves by listening to the working sound. In case of
leaking replace the damaged valve.
•
Check pneumatic hoses:
Check visually pneumatic hoses and union pipe connections. Replace a hose if
there are ruptures or slashes on it.
•
Check the operation of the device.
