2008 39 DSTOPTRS
C. Look under the pick-up head and inspect the blast orifice curtain for excessive
wear or damage. Also, check for any debris jammed in the orifice opening such
as rocks, cans or sticks.
D. Inspect the pressure and suction hoses on either side of the sweeper for wear
holes or damage. A temporary field fix can be made using duct tape to patch
holes until a new tube is installed. Failure to repair or replace worn hoses will
result in excessively dusty sweeping conditions.
E. At least once a week the pick-up head pressure inlet turning vanes should be
inspected for blockage and wear. Do this by lowering the head to the ground.
Make sure auxiliary engine is off! Loosen the lower pressure tube clamp and lift
the tube off of the pressure inlet ring. If a large build-up of debris is found, then
check that the separator door inside the hopper is being properly secured and
that the hopper screen mesh does not have any holes worn through. If the turn-
ing vanes are severely worn, then the bolt-on replaceable inlet assembly should
be replaced in order to maintain sweeper performance.
F. Check the pick-up head drag links to make sure they are not bent or damaged,
repair or replace before using sweeper.
G. Inspect the pick-up head upstops for damage and repair or replace immediately.
A damaged upstop can cause sever damage to the truck drive shaft by allowing
the pick-up head to contact the drive shaft when raised.
2. Broom Assist Daily Service
A. The broom assist contact pattern must be checked by the operator before each
shift especially if it has been used extensively. The sweeper should be on a level
surface such as a parking lot or shop floor. Lower the pick-up head and pull the
sweeper forward slightly to fold under the curtains. Make certain the sweeper is
ready for sweeping, (i.e., all doors closed, etc.) and throttle up auxiliary engine.
Turn broom assist on and allow the broom to run for approximately one minute to
burnish a pattern onto the pavement. Idle the auxiliary engine RPM, raise the
broom and then the pick-up head and drive sweeper forward so that the pattern
can be checked. The pattern mark should be 1-1/2 to 2 inches wide and fairly
even the full width of the broom.
NOTE:
Do not mistake the blast orifice pattern for the broom pattern.
B. Should the broom pattern be lighter on one end or the other, locate the two pivot
arm springs on top of the broom assist pick-up head (one on each side), back off
the eye bolt of the spring on the light pattern side a few turns but no more than
1/2 inch at a time. Recheck and adjust until pattern is set correctly.
NOTE:
BROOM SHOULD BE ROTATED WEEKLY FOR MAXIMUM BROOM
SERVICE LIFE.
C. Pick-up heads with the broom assist should have the broom inspected daily for
debris wedged between the front of the broom and the blast orifice flange. The
broom should also be inspected for severe coning on either end so that the
broom may be rotated before excessive wear is incurred.
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