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Symptom
Vibration is insufficient and
as a result the concrete
floor cannot be leveled and
smoothed in the proper way.
The DuoScreed when used
as a form to-form screed
vibrates too much and does
not travel smoothly across
the rail supports.
Concrete looks "WAVY" as
the screed blade passes
over it.
Leaving HIGH or LOW
spots during wet screeding.
Blade digs into wet concrete. Is blade positioned correctly?
DSGPULW DUOSCREED • OPERATION MANUAL — REV. #8 (06/12/23) — PAGE 25
TROUBLESHOOTING ( DUOSCREED )
Table 4. DuoScreed Troubleshooting
Possible Cause
The centrifugal force of the vibrator
is set too low?
There is excessive amounts of
concrete along the leading edge of
the blade?
The chosen width of the blade is too
large?
Selected blade and eccentric weights
do not match?
Operator moving too slowly?
Too much vibration for the type of
concrete?
Concrete too high or low on one side?
Solution
Adjust the eccentric weights per Figure 8 or
increase engine speed.
Remove the excessive concrete from the blade.
Work with a smaller blade Remember maximum
width is 20 ft. (2 engines)
Adjust eccentric weights to match selected blade
width. Reference Figure 8.
Walk backwards at a faster pace.
Reduce engine speed and walk backwards at a
faster pace.
Have workers shape the concrete close as
possible to grade. Maintain about 1 inch of
concrete accross the front of the blade at all
times.
Each end of the blade must ride on the same
surface. Either each end of the blade rides on
forms or concrete (wet screed) not both.
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