HYDAC International SF 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,
replace cover plate and tighten cover plate
screws alternately. Switch on the hydraulic
system and check filter for leakage. Vent filter
at an appropriate point in the system.
1.4 Maintenance Tools
Torque Value
Size SF
Nm [ft-lb]
60 20 [15] Int. Hex 6.35 [1/4"]
110 20 [15] Int. Hex 6.35 [1/4"]
160 20 [15] Int. Hex 6.35 [1/4"]
240 20 [15] Int. Hex 6.35 [1/4"]
330 40 [29]
950-1300 200 [147]
Torque Value
Size SFM
Nm [ft-lb]
330 35 [26]
Size SFF Cover plate Wrench for hex
400 Hex 36
500 Hex 36
1.5 Torque Values
Type Max. Torque Nm [ft-lb]
VR-clog ind 15 [11]
V1/4-clog ind
15 [11]
(on SFF)
Oil Drain Plug N/A
Do not Torque
Lid or end cover
(See 1.3 and 2.2)
FIL1611-1849 / 04.19
Filters
SF/SFM/SFF Series
Service and Parts
up to 132 gpm (500 l/min)
2. Element Replacement
2.1 Element Removal
1. Switch off hydraulic system and release filter
pressure.
Caution: when installed inline
before opening the filter, slowly open the
vent screw and release pressure
pressure in the tank, if any)
2. Size 60-330:
Loosen cover plate bolts and lift off the cover
plate.
Size SFM 330:
Loosen cover plate bolts and lift off the cover
plate.
Size SFF 400 - 500:
Unscrew cover plate bolts.
3. Lift out filter element. Examine element
surface for dirt residues and larger particles
since these can be an indication of damage
to components.
4. Replace or clean filter element(s) (only W/HC
Hex
and V elements can be cleaned).
Allen key
5. Clean housing, cover plate.
6. Examine filter, especially sealing surfaces,
for mechanical damage.
7. Check O-rings – and replace if necessary.
Int. Hex 8
Ext. Hex 30
Cover plate
bolts
Wrench for
hex. bolts
Hex 17
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. Place filter element(s) carefully on to the
(release
element nozzle in the housing.
.
4. Size SF 60 - 330, SFM 330:
Replace cover plate and screw in cover plate
bolts by hand; then tighten bolts alternately.
Size SFF 400 - 500:
Replace cover plate and screw in manually.
5. Switch on hydraulic system
6. Check filter for leakage.
7. Vent filter at a suitable point in the system.
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.