Maintenance and Service
Hydraulic system
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In order to exchange filter element in the suction return filter
proceed as follows:
– Before opening the filter housing, make sure that the
hydraulic system is absolutely pressureless and the oil fill-
ing cap is open.
– Remove the four cover fixing screws and keep them for
future use.
– Take off the lid of the suction return filter.
– Remove with a slight twisting motion the separating plate
with the attached filter element.
– Dismantle the pulled out unit into separating plate, filter
element and dirt collection tray.
– Clean housing, cover, separating plate and dirt collection
tray. A metal protective strainer is installed in the sepa-
rating plate. Check the inner side of the strainer on metal
chips or other foreign bodies. This protective strainer fil-
ters the hydraulic oil, e.g. "sucked" from the hydraulic oil
tank by a dirty filter element or at low temperatures.
– Check the filter on mechanical damages. Damaged parts
may not be installed again (they must be immediately
replaced).
– Check the O-rings and replace any damaged parts.
– Moisten sealing surfaces, thread and O-rings with fresh
hydraulic fluid before installation.
– Always use a new filter element.
– When inserting a new filter element use the provided with
it O-ring.
– Mount the separating plate, filter element and dirt collec-
tion tray in one unit.
– Insert the separating plate with the attached filter element
and dirt collection tray with the slight twisting motion in the
filter head.
– Place the cover on and screw the fixing screws in again.
The tightening torque for the fastening nuts is 40 Nm.
(2) Cover
(3) Separating plate
(4) Filter element
(5) Dirt collection tray
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