21
Operation and maintenance manual for
Hydrotech Drumfilter HDF501-series
7.3.1.Change.the.filter.panels.
1. Set the safety switch to OFF and lock
it in the OFF position with a padlock.
2. Unscrew the bolt nuts on the lower
angle bar of the filter element strap
(See figure 7.3.1 a).
3. Loosen the the old filter panel and the
lower angle bar by using something
flat and blunt to lift the angle bar over
the bolts (See figure 7.3.1 b).
4. Lift up the strap section with one hand
and take out the old filter element with
your other hand (See figure 7.3.1 c).
5. Check that the pin bolts are
undamaged. Then adjust each pin bolt
so that about half of it is screwed into
the flat bar on the drum.
6. Put the new filter element in place
under the strap section’s upper angle
bar.
7. Bring down the lower angle iron of the
strap section to the end of the filter
element. Press down the strap and
filter element together over the holes
of the angle iron that fit over the pin
bolts (See figure 7.3.1 d). Be careful
not to damage the cloth when the filter
element is fitted under the pin bolts.
8. Use poly clutching-tongs to hold the
angle iron of the strap close to the flat
bar of the drum when putting on the
two nuts.
9. Tighten the nuts, but only so hard that
you can still adjust the flat bars of the
straps.
10. Align the flat bars with the filter
element’s grid structure (parallell to
the long side of the filter panel).
11 Tighten all nuts so that the strings
and edge straps are tense on the
filter cloth. Use a box spanner and
hand power only. It is not necessary
to tighten the angle iron until it makes
contact with the flat bar.
12. Set the safety switch to ON and the selector switch to AUTO.
(see also section 5.1)
7.4.Drive.chain.(not.applicable.for.HDF501-1P)
Figure 7.3.1 a-d
7.3.1 a
7.3.1 b
7.3.1 c
7.3.1 d
