Marshalltown SPNRSSAGAS Manual Del Usuario página 8

STRAIGHT PULL METHOD - WET CONCRETE OPERATING METHOD ONE
When working with wet concrete, start the Spin Screed®, squeeze the throttle lever, and slowly pull it over the concrete
while muckers maintain about a 2-inch surcharge of concrete in front of the screed. After advancing 6 to 8 feet, allow the
spinning Spin Screed® to move slowly backward over the freshly screeded concrete. This slow backwards pass pushes
aggregate left on the surface down while bringing paste to the surface. After backing over the poured section, slow down
the Spin Screed® and pull the screed back to the area where more concrete has been placed. Begin screeding again. With
concrete wetter than a 5-inch slump, pulling over the concrete surface a second time with the motor running will produce
a flatter surface with sufficient paste for floating. Examine the surfaces prepared by the Spin Screed® and adjust your
technique to product the desired surface for floating.
BUMP AND RUN METHOD - STIFF CONCRETE OPERATING METHOD TWO
With stiff concrete, pulling the Spin Screed® over the concrete produces a rough surface that is difficult to float. To get the
best results, use the "bump and run" technique. Start by squeezing the throttle lever to start the Spin Screed® and gently
bumping a 2-3-inch surcharge with the Spin Screed®, causing it to advance a few inches, and then allow it to retreat 4 to 6
inches. Advance the Spin Screed® again. Continue the "bump and run" technique until you have advanced 6 to 8 feet, then
allow the Spin Screed® to move backward slowly over the freshly screeded concrete with the Spin Screed® still running.
This slow backwards pass pushes aggregate left on the surface down while bringing paste to the surface. After backing
over the poured section, turn off the Spin Screed® and pull the screed back to the area where more concrete has been
placed. Begin screeding again. The screeded section is ready for floating and should be done immediately. When screeding
stiffer concrete, pulling the Spin Screed® forward a second time tends to remove the layer of paste that has been worked
to the surface and makes the surface more difficult to float and finish.
IMPORTANT
Ensure the Spin Screed® is cleaned immediately after use to prevent concrete from curing in the engine drive shaft, engine
enclosure, handle joints, or on the Pipe.
Cleaning the engine should be done by blowing compressed air and washing by hand—avoid getting water near the
carburetor. Pressure washers are recommended for cleaning the Pipe but should NOT be used to clean the engine or gear
box.
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104 S. 8th Ave. Marshalltown, IA Phone 800-888-0127 / 641-753-0127 • Fax 800-477-6341 / 641-753-6341 www.MARSHALLTOWN.com
PRODUCT OPERATION
Slump levels of 5 or more, maintain 1 to 2 inch surcharge
Slump levels of 3 to 4 inches, maintain 2.5 to 3.5 inch surcharge
(OVER)
(OVER)
STRAIGHT PULL
STRAIGHT PULL
BUMP AND RUN
BUMP AND RUN
WS2860