Marshalltown SW100H Shockwave Vibratory Screed - Manual (Page 14)

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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
WS570
R10-22-12
OPERATING ON WET CONCRETE
Once the engine is warm
and running by itself with
the choke OPEN you can
begin screeding concrete .
For specific instructions on
Wet Screeding and Form to
Form screeding please see
pages 10 and 11 .
1 . Begin by placing concrete within your forms slightly higher
than the forms themselves .
2 . Place screed on top of concrete and start engine .
3 . Increase engine RMP until the clutch engages causing
the screed to vibrate .
4 . Walking backwards, begin screeding concrete (see page 10
for Wet Screeding or Page 11 for Form to Form screeding) .
5 . Your throttle lever does not require constant contact, but
you can adjust RMP and vibration to accommodate wet or
dry concrete . Dry or low slump concrete may require
more vibration to level and screed
6 . Continue moving backwards while keeping concrete placed
in front of the blade . The roll back feature of the blade will
keep help keep concrete from sliding over the blade .
Concrete placed too high may slide over the board! This
could make the screed too hard to pull and result in a slab
that is out of level .
DO NOT OVER VIBRATE CONCRETE!
The following are signs of too much vibration:
• Excessive concrete splatter
• Blade sinking below wet pads
• Ripple or “wake marks” following the blade
• Concrete easily sliding underneath form boards causing dips
along the form edge
Always remember,
the less vibration the better . Use only
enough vibration to be able to comfortably pull screed back-
wards, leaving a smooth, level surface .
!