DSTOPTRS 4 2008
11.With suction transition removed, check
the vacuator manifold screen rock
guard for any obstruction and clear if
necessary. Close vacuator manifold
ball valve. See Photo M01361.
12.Operator should make sure the
vacuator hose and scavenge hose are
clear and free flowing before beginning
to sweep. Both cleanout ports expan-
sion plugs must be reinstalled. See
Photo M01362.
13.Check flue plate operation. Open the
large access door, switch the sweeper
ignition to run position and turn on the
dustless switch found at the control
panel. Flue plate should open all the
way. Turn off dustless switch and the
flue plate should close. (Photo
M01307)
NOTE: The flue plate takes 45 sec-
onds to travel from full closed to full
open. If the flue plate fails to move,
make sure service switch on the side of
heat box is on (green light next to
switch indicates on).
14.With the pick-up head in raised posi-
tion, check blast orifice gap underneath
head and remove any rocks or obstruc-
tions. For best sweeping, a severely
worn or damaged blast orifice must be
repaired. Check skid plates for proper
setting and inspect for wear. Skid
plates may be rotated from side to side
to even out wear on the carbide
runners.
M01361
M01362
M01307
15.It is important to check the pick-up head curtains for excessive wear. DST
sweepers will not perform dustless if the pick-up head seal curtains are worn out.
16.Inspect the condition of the gutter broom bristles, replace if bristles are shorter
than 6".
CAUTION! Using incorrect gutter broom bristles or bristles that are too
short can lead to expensive pick-up head repairs, especially
when sweeping the curb or badly overlaid streets.
The smaller diameter of a worn broom causes operator to ride in on curb allowing
the pick-up head skid plate to fall into the gutter causing the pick-up head to be
dragged unevenly on the road surface which quickly wears the pick-up head seal
curtains and can cause wear to the bottom sheet metal panel of the pick-up
head.
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