HYDAC International RFD Series Service And Parts

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
Int. Lid Screws
Torque value
Size
Nm [ft-lb]
60/110 20 Nm [14]
160/240 20 Nm [14]
330 40 Nm [29]
660 150 Nm [110]
950/1300 200 Nm [147]
1.5 Torque Values
Type Torque Nm[ft-lb]
VR clogging indicator 30 [22]
1.6 Torque Values for Reservoir
Mounting Bolts
Torque Nm
Size
[ft-lb]
RFD 60/110 5 [3.7]
RFD 160/240 8 [6]
RFD 330 20 [15]
RFD 660 20 [15]
RFD 950/1300 25 [19]
FIL1609-1828 / 04.19
Filters
RFD Series
Change-Over Return Line Filter
Service and Parts
up to 343 gpm (1300 l/min), up to 362 psi (420 bar)
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
hex bolt
damage to components.
Allen key
4. Remove contamination retainer (if present)
Hex 6
by turning counter-clockwise – bayonet
Hex 6
fitting.
Hex 8
5. Replace or clean filter element(s) (only W/HC
Hex 14
and V elements can be cleaned).
Hex 17
6. Clean housing, cover plate and
contamination retainer.
7. Examine filter, especially sealing surfaces,
Bolt
Size
M5
M6
M8
M12
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.
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.