The following maintenance steps should be followed
to maximise optimal performance and reliability of the
Daily Inspection of Micro Filters:
It is highly recommended that operators check dust
levels inside secondary ﬁ lter housing on a daily basis.
This will indicate the effectiveness of the primary ﬁ lters.
If there is dust building up inside the secondary ﬁ lter
housing, it is more than likely due to one of the follow-
1. Small holes or perforations have developed in
primary ﬁ lters.
2. There is a problem with a seal in the primary ﬁ lter
housing assembly. If when inspected, it is found that
there is dust building up inside the secondary ﬁ lter
housing, it is recommended to remove the primary
ﬁ lters and check for small holes or perforations.
Usually, small holes will begin to develop around the
stitching of the ﬁ lter media. If small holes are locat-
ed, clean area around hole with either compressed
air or vacuum. Once area is clean, the hole can be
repaired with silicone sealant. If no small holes or
perforations are found, check rubber seals in the
primary ﬁ lter housing assembly and make sure they
are all intact.
Generally speaking, with consistent use, the primary
ﬁ lters should be replaced approximately every 6
months. This will maintain good suction levels and
reduce incidence of holes developing in the ﬁ lters.
The secondary ﬁ lter should be changed every 12
months. Made from a polyester ﬁ lter media, the sec-
ondary ﬁ lters can be washed out with water. Ensure
they are fully dry prior to re-installation.
On re-installation of the secondary ﬁ lter, ensure the
seals are ﬁ rmly pressed against the wall of the sec-
ondary ﬁ lter housing. This contact can be assessed
by looking down through the ﬁ lter link hose coupling.