2008 13 DSTOPTRS
2. Hopper Screen - The hopper screen must be inspected for wear holes or weld
failures which would allow large debris to pass from the hopper into the centrifu-
gal dust separator. Large debris will cause rapid wear of the blower housing
components and would quickly blind over the pressure turning vanes inhibiting
proper sweeper performance.
E. DST-6 FILTERS
Four large PTFE filters are used by the DST-6 to clean the exhaust air of the small-
est particulate dust. Care should always be taken when handling these filters as the
external PTFE membrane is easily damaged. These filters are washable, however,
only low pressure water spray should be used to clean the filter media. DO NOT
drop or bounce the filter against the ground as this will deform the metal ends and
possibly damage the filter media.
1. Shop Air Pulse - The DST-6 has provision to attach REGULATED
shop air. This
allows the filters to be pulsed for cleaning without running the sweeper auxiliary
engine. Shop air must be regulated to 100 PSI MAX. in order to prevent damage
to the filter PTFE media. The sweeper ignition key must be on and the pulse
switch on for pulse timer control to cycle the pulse system. Using this system
regularly will help extend the filter service life by ridding the filter media of stub-
born dust deposits.
2. Gasket Integrity - The operator or service technician should inspect the filter seal
gasket and access door gasket each time the filters are removed from the DST-6
box. Damaged or torn seals will allow dust to bypass the filter media and dirty ex-
haust air will result. Seal gaskets can be replaced, new gasket must be re-glued
to the end of the filter.
NOTE: Decal on the filter side
of the DST-6 box shows
correct way to install
filters. Decal also gives
replacement part numbers
for filter seals.
3. Media Integrity - Replacement of
the filter with any other filter than
the Donaldson Torit TORIT-TEX®
PTFE filter will void sweeper perfor-
mance warranty!! The filter media is
composed of a polyester substrate
which provides the backing for a
PTFE surface membrane. The
PTFE membrane can be easily
damaged and should be handled
with care when servicing or clean-
ing. Any hole found in the media
requires filter to be replaced. White
stringy material hanging off the filter
is an indication of PTFE membrane
failure. Filter restriction will increase
as more PTFE membrane is lost
from substrate. The DST-6 sweeper
dustless performance greatly
M01379
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