DCE80-100E
Technical Handbook
High pressure filter
Description, service
33
P.Group 70
TDCE01
04GB
High pressure filter
Two high pressure filters located immediately after the pumps are
used to clean the fluid. The filter head is equipped with a by-pass
valve which opens at 5 bar. The opening area is initially small but
gradually increases with the pressure drop across the filter, ie, as
the amount of impurities trapped by the filter cartridge increases.
The filter element is a fibreglass cartridge with an absolute mesh
of 25 µ.
High pressure filter
The high pressure filter for the hydraulic fluid must be changed at
the intervals specified in the lubrication chart.
In addition, the filter must always be changed whenever work has
been carried out on the hydraulic system.
1. Clean the outside of the filter and the area around it.
2. Place a vessel under the filter to collect any spillage.
3. Remove the filter bowl. Use an open-ended or ring spanner.
4. Remove the filter cartridge.
5. Replace the O-ring between the filter head and the bowl and
the O-rings on the adapter. The O-rings are packed together
with the filter cartridge.
6. Lubricate the O-ring for the filter head with hydraulic fluid.
7. Carefully clean the filter bowl and fill it half-full with hydraulic
fluid.
8. Remove the filter cartridge from its package and fit it imme-
diately.
9. Fit the bowl and tighten it to a torque of 140 Nm.
10. Start the engine to purge the system of air, and check that
the filter does not leak.
1. Filter head
2. Filter bowl
3. Arrow, flow direction
1
2
3
IMPORTANT!
The high pressure filter cartridge must always be changed
when a pump has been exchanged.
The filter must always be fitted with its top arrow pointing
in the flow direction.
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