Nilfisk 3707 Manuel D'instructions page 40

3707 - 3707/10 - 3907 - 3907W - 3907/18
■ Fit the filter shaker knob and lock it in the lowered position
with the stop so that the filter is kept stretched.
■ Fit the suction hose on the upper inlet.
Primary filter replacement, for machines equipped
with electric filter shaker cleaning system
■ Remove the hose (1) from the upper inlet.
■ Release the two closing hooks (4) and remove the cover
(5).
■ Sling the cover and lift it carefully, because the star-shaped
filter and the shaking cage are connected to the cover.
Do not rest the cover-star-shaped filter assembly
vertically on the ground, but use suitable supports or
rest it sideways, as the weight of the cover can damage
the filter and the shaking cage.
■ Lift the filter (6), unscrew the clamp (7) and remove the
ring (8).
■ Cut the clamps (10) and detach the cage from the filter.
■ Fit the filter catch and retention ring of the old filter on to
the new one.
■ Insert the cage (9) and fix it to the filter by means of the
clamps (10) on the bottom of the filter itself.
■ Check that:
- The lever (11) fastened to the drive shaft (12) of the
cage (10) must be halfway along its travel in the
neutral central position.
- The connecting rod (13) fastened to the reduction unit
(14) must point downwards. Only in this way, when
operating the reduction unit (14), the cage (10) will
cover an equal travel to the right and left when, without
tightening the filter (8). The filter could be torn and the
motor of the reduction unit burnt out if this is not done.
■ Fit the filter into the filtering chamber, then mount the cover
(5) and lock it in place with the two fastening latches (4).
Before closing the hooks to lock the cover, shake the filtering
unit by hand in order to remove any small positioning
defects.
GB
■ Fit the suction hose on the upper inlet.
Primary filter replacement for machines that handle
dusts that are hazardous to health.
E
To replace the primary filter safely, follow the instructions
according to the type of filter/cleaning system installed on the
E
machine, and proceed as follows:
■ Insert the plug (1) in the vacuum inlet.
■ Insert the belt (2) around the filter chamber.
■ Place the bag with the elastic band on the filter chamber
(3). Tighten the safety belt (4) on the bag, above the band.
■ Tuck in the bag along its length. (5)
■ Remove the star filter (6) by grasping the ring with the
gasket and lift it until it is completely out of the filter
chamber (7).
■ Turn the bag on itself to obtain a section of coiled bags to
be tightened with two clamps (8). Place the two clamps at
a distance of 50 mm between them, then cut in-between
(9) as shown in the figure.
■ Dispose of the filter (10) according to the laws in force.
■ Loosen the belt (11) and carefully move the bag elastic
C65
Figure 17
CAUTION!
CAUTION!
Figure 18
band (12) towards the filter chamber upper edge.
■ Insert the second bag (13) over the first bag (14) and
tighten the safety belt (15) on the new bag.
■ Through the new bag (13) carefully remove the crop of the
first bag (14) from the edge of the filter chamber.
■ Bring the crop (14) towards the end of the second bag
(13).
■ Turn the bag (13) on itself to obtain a section of coiled
bags and close of the crop (14) at the bottom of the bag
(13) by tightening the clamp (16)
■ Loosen and remove the belt and gently remove the bag
from the edge of the filter chamber.
Primary cartridge filter replacement, for machines
equipped with automatic cleaning system
Before performing any operation on the filter assembly,
shut off the compressed air supply to the tank and vent
off all the air from the tank, through the tap. Stand well
back to prevent air from blasting into the face.
1.
Vacuum hose
2. Clamp
3. Cap
4. Release lever
5.
Filter ring
6. Cartridge assembly
7. Power supply cable
8. Pneumatic supply connection
9. Junction
10. Connector
11. Tank fastening screws
12. Cartridge fastening screws
13. Cartridges
■ Loosen the clamp (2).
■ Remove the vacuum hose (1).
■ Operate the levers (4).
■ Remove the cover (3) and the filter ring (5).
■ Disconnect the power supply cable (7) and the compressed
air supply from the air intake coupling (8).
■ Remove the cartridge assembly (6).
■ Disconnect the connectors (10) and the union (9).
■ Disassemble the air tank by operating on the screws (11).
■ Unlock the fastening devices (12) and lift the cartridges
(13), paying attention to the dust on them and place them
in a plastic bag.
■ Get four cartridges with the same characteristics. These
will be supplied with the gasket which must be positioned
in the relevant housing on the lower side of the cartridge
fastening flange.
16
CAUTION!
Figure 19