S E R V I C I N G A N D I N S PE C T I O N
188
Changing the return lter element
The hydraulic system is equipped with a return lter Item 2
(Fig. 86). It is connected to an indicator light. An installed
bypass valve secures the return valve against positive pres-
sure.
ENVIRONMENTAL NOTE
Let the pressure from the hydraulic uid reservoir
escape by opening the hydraulic uid ller neck
cap Item 1 (Fig. 83) before you unscrew the cover
of the lter housing Item a (Fig. 87). Otherwise,
hydraulic uid will be forced out of the lter housing
and could get into the environment.
Dispose of the old lter element and any leaking
hydraulic uid in an ecologically sound manner.
Replace the lter element of the return lter Item
b. (Fig. 87) during inspections or if the indicator
light for the return lter on the instrument panel is
illuminated between inspection intervals.
After installing a new lter element, the indicator
light on the instrument panel should no longer be
illuminated.
Replace the lter element in a timely manner, as
the lter‘s effect is overridden when the bypass
valve is open.
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