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PAGE 20 — DSGPULW DUOSCREED — OPERATION AND PARTS MANUAL — REV. #6 (12/10/10)
l
Figure 15. Throttle Lever
DSGPULW DUOSCREED — APPLICATION/OPERATION
8. Set the DuoScreed blade down in the concrete base in the
left
most corner of the grid between the two grade pins as
shown in Figure 16. Adjust the DuoScreed's handle bar
to a height where the operators is not bending over, but
standing upright with arms extended forward.
9. To begin screeding move the engine throttle lever (Figure
15) midway between idle and full throttle. Notice that the
DuoScreed's vibration will cause the blade to sink into the
concrete base until it touches the top of the grade pins
10. Pull the DuoScreed from the edge of the grid's
top left
corner, horizontally toward the
center
. Notice that as the
DuoScreed passes over the grade pins a small circle of
concrete around the grade pins will appear. This indicates
that the Duoscreed has vibrated the grade pin, and that
the operators is
dead on grade
.
11. Keep the DuoScreed blade level and create a level base
between 12-18 inches wide.
12. After a complete pass over the first set of grade pins has
been made, remove the DuoScreed from the concrete
base and position it over the second set of grade pins
(Figure 16), overlapping the first set of grade pins be-
tween 12-18 inches. Repeat this process until all
left
edge
grade pins have a level base between 12-18 inches wide.
Before placing the DuoScreed in
concrete, make certain the unit has
been set up (blade) for
wet screeding
.
This can be verified by observing that
the operator's toes are pointing
towards the smooth side of the blade
(Figure 3), from the operators's position
(handle bars).
NOTE
13. Repeat steps 9 through 12 pulling the DuoScreed from
the edge of the grid's
top right
corner, horizontally toward
the center.
14. Remember to build the bases in long parallel strips
across the pins and on the hand floated edges and
against plumbing or other outs, leaving the long unfin-
ished areas about 8 or 9 feet wide. Once the bases are
built, the workers can more accurately shape the concrete
to grade.
15. When
all
the bases have been completed, the operator and
his two workers can begin to work down the long parallel
unfinished 8 to 9 foot wide middle portions. When moving the
DuoScreed down the middle portions, the ends of the
DuoScreed blade should be resting on the bases, and the
leading edge of the blade should be approximately 1/8 to
1/4 inch above each base depending on the slump and
condition of the concrete. Have workers adjust the concrete
along the face of the DuoScreed's blade to assure that the
base is level with no high or low areas ahead of the blade.
16. Keep the engine throttle between 1/2 to 2/3 of full speed, if
necessary readjust the DuoScreed's vibration to meet the
condition of the concrete. Remember to move rapidly and
watch both ends of the blade to assure that the blade remains
1/8 to 1/4 of an inch above the concrete base. Always keep
the workers alert for concrete height changes.
Shut-Down
1. NEVER
stop
the engine suddenly while running at high
speed.
2. Move the engine
throttle lever
(Figure 15) to the low
speed position (idle).
3. Set the engine ON/OFF switch (Figure 12) to the OFF
position.
4. Remove the DuoScreed from the slab surface.
Cleaning
1. Allow the engine to
cool
before cleaning. When the engine
has cooled, use a damp and a mild detergent to remove all
concrete and foreign debris. DO NOT spay the engine with
water.
2. To remove all concrete and foreign debris from the
DuoScreed, wash the DuoScreed's blade and frame using
water and a mild detergent. Remember, if form oil was
applied before the machine was placed in concrete, the
cleanup will be much easier.