Appendix
Maintenance Instructions - Hydraulic Equipment
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B 034 00 04
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6
6.2
Maintenance instructions for hydraulic equipment
IMPORTANT
Do not use unskilled personnel for hydraulic system maintenance.
Hazard: Personal injury and damage to property.
Only skilled, specialist technicians should be allowed to work on hydraulic
equipment.
Do not allow the oil temperature to 50 °C or fall below -30 °C.
The interval at which oil should be changed depends on a variety of factors including the age of
the oil and the amount of dirt contained in it. As a general rule, the oil should be changed at the
following intervals:
Interval [service hours]
Component / Maintenance Operation
50 - 100
First maintenance service after installation. (This does not apply to
subsequent maintenance services):
Change the oil and the filter
50
Check the oil level
The oil must show no visible signs of foaming.
Check the tightness of screw connectors.
200
Check the return filter for dirt. Clean where necessary.
Change the filter cartridge where necessary.
5000
(or annually)
Change the oil.
Change the return filter and the vent filter sets.
To change the oil, proceed as follows:
Move the hydraulic cylinder to its end stop.
This will expel all the oil.
Drain off or pump off the oil from the hydraulic unit.
Remove the unit cover or open the inspection cover.
Thoroughly clean the oil tank. (Make sure that you remove all oil sludge).
Change the return filter and the vent filter sets.
Refit the unit cover or close the inspection cover.
Fill the tank with hydraulic oil to the level mark shown on the inspection glass.
See the oil manufacturer's specifications.
At the other end of the cylinder (relative to its current position), disconnect the hose of the
hydraulic cylinder on the fixed piping side. Place a container under the disconnected hose.
Move the cylinder to its other end stop.
The remaining old oil will be pushed out of the hose into the container prepared
previously.
Refit the hydraulic hose and check its seal.
Bleed the hydraulic system and check the oil level. Top up where necessary.
