Filters
FIL1609-1828 / 04.19
RFD Series
Change-Over Return Line Filter
Service and Parts
up to 343 gpm (1300 l/min), up to 362 psi (420 bar)
NOTE:
Contamination or incomplete pressure release
on disassembly can lead to seizing of the bowl
thread.
Filter elements which cannot be cleaned
must be disposed of in accordance with
environmental protection regulations.
1. Maintenance
1.1 General
Please follow the maintenance instructions.
1.2 Installation
Before installing the filter into the system, check
that the operating pressure of the system does
not exceed the permitted operating pressure of
the filter.
Refer to the type code label on the filter.
1.3 Commissioning
Check that the correct filter element is installed.
Install lid, screw in cover plate bolts alternately.
Switch lever to one filter side. Switch on
hydraulic system and vent filter.
1.4 Maintenance Tools
Size
Torque value
Nm [ft-lb]
Int. Lid Screws
hex bolt
Allen key
60/110
20 Nm [14]
Hex 6
160/240
20 Nm [14]
Hex 6
330
40 Nm [29]
Hex 8
660
150 Nm [110]
Hex 14
950/1300
200 Nm [147]
Hex 17
1.5 Torque Values
Type
Torque Nm[ft-lb]
VR clogging indicator 30 [22]
1.6 Torque Values for Reservoir
Mounting Bolts
Size
Torque Nm
[ft-lb]
Bolt
Size
RFD 60/110
5 [3.7]
M5
RFD 160/240
8 [6]
M6
RFD 330
20 [15]
M8
RFD 660
20 [15]
M12
RFD 950/1300
25 [19]
M16
for mechanical damage.
8. Check O-rings – and replace if necessary.
2.2 Element Installation
1. Lubricate the sealing surfaces on the filter
housing and cover plate, as well as the
O-ring, with clean operating fluid.
2. When installing a new filter element, check
that the designation corresponds to that of
the old element.
3. If present, install the contamination retainer
onto the new or cleaned filter element by
turning clockwise.
4. Place filter element carefully on to the
element nozzle in the housing.
5. Sizes 60-330:
Replace cover plate and screw in cover plate
bolts by hand; then tighten bolts alternately.
Sizes 660-1300:
Replace cover plate in correct position
(dowel pin in the housing must line up with
groove in cover plate) and turn counter-
clockwise as far as it will go. Tighten cover
plate bolts alternately.
6. Vent filter at an appropriate point in the
system.
7. Check filter for leakage.
2. Element Replacement
2.1 Element Removal
1. Switch lever slowly over to clean filter side.
Caution when installed inline:
Before opening the filter, slowly open the
vent screw and release pressure.
(release pressure in the tank, if any)
2. Size 60-330:
Loosen cover plate bolts and lift off the cover
plate.
Sizes 660-1300:
Unscrew cover plate bolts by approx. 2 turns
(no need to remove completely). Turn cover
plate clockwise until it can be lifted off by
holding near the bolts (bayonet fitting).
3. Pull out filter element(s) (with contamination
retainer, if present) by the handle. Examine
element surface for dirt residues and larger
particles since these can be an indication of
damage to components.
4. Remove contamination retainer (if present)
by turning counter-clockwise – bayonet
fitting.
5. Replace or clean filter element(s) (only W/HC
and V elements can be cleaned).
6. Clean housing, cover plate and
contamination retainer.
7. Examine filter, especially sealing surfaces,
