DSTOPTRS 12 2008
2. Flotation Springs - To prevent rapid wear of the skid plate runners, the pick-up head
is suspended by four flotation springs. The flotation springs also serve to absorb
hard impacts from irregular street surfaces, broken curbs, etc. Failure to keep flo-
tation springs properly tensioned will result in premature skid plate runner wear and
possible damage to the pick-up head components. Detailed drawings M00772 &
M00744 in the pick-up head section show how to set the pick-up head spring
tension.
3. Seal Curtains - Located on the bottom of the pick-up head are rubber curtains which
serve to seal the air stream of the regenerative sweeper beneath the pick-up head,
as it channels the air and entrained debris to the suction nozzle. These curtains
must be replaced regularly for proper sweeper performance. Faster sweeping
speeds result in faster wear to the curtains due to the increased friction caused by
the increased speed. The curtains should be replaced as a set for best sweep-
ing performance. Refer to the Parts & Service Manual for detailed replacement
procedure.
Operator should inspect the condition of the blast orifice gap. An incorrect blast
orifice gap will cause poor sweeping performance. Always replace the blast
orifice curtain when changing the pick-up head seal curtains.
4. Turning Vanes - Directional turning vanes are located inside the ring used to con-
nect the pressure tube to the top of the pick-up head. These vanes should be in-
spected once weekly for any debris such as paper and grass. Excessive amounts
of debris found on turning vanes will cause poor sweeping and indicates separator
door or hopper screen problem.
D. SEPARATOR
The centrifugal separator in the for-
ward most area of the hopper is the
most important component of the re-
generative air sweeper system as it
cleans the air stream of recirculated
dust thus protecting the blower and
blower housing components from ex-
cessive and rapid wear. The separator
must be cleaned daily, inspected after
washing and examined for any rubber
liner wear. The operator is solely re-
sponsible for the separator care and
maintenance. (Photo M01373)
The separator skimmer slot must be examined and cleaned of any deposits which will
block the skimmer slot and prevent dust from being spun out of the air stream. Rapid
blower wear will result if separator is not serviced properly!
1. Proper Closing Procedure - Do not close the separator door if the hopper raker plate
is in the full forward position (dump door closed). Open dump door so that the raker
plate is about half way down the hopper floor, then allow the separator door to slam
closed by releasing the separator door cable from its locked open position.
ATTENTION: The separator door will hang on raker plate and not close properly if
raker plate is not retracted causing rapid wear of the blower housing
components.
M01373
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