MULTIQUIP DSGPULW User manual

OPERATION MANUAL
THIS MANUAL MUST ACCOMPANY THE EQUIPMENT AT ALL TIMES.
MODEL DSGPULW
DUOSCREED LIGHTWEIGHT
(HONDA GX35SAT GASOLINE ENGINE)
Revision #8 (06/12/23)
To nd the latest revision of this publication or
associated parts manual, visit our website at:
www.multiquip.com

PAGE 2 — DSGPULW DUOSCREED • OPERATION MANUAL — REV. #8 (06/12/23)
PROPOSITION 65 WARNING

DSGPULW DUOSCREED • OPERATION MANUAL — REV. #8 (06/12/23) — PAGE 3
SILICOSIS WARNING
Grinding/cutting/drilling of masonry, concrete, metal and
other materials with silica in their composition may give
off dust or mists containing crystalline silica. Silica is a
basic component of sand, quartz, brick clay, granite and
numerous other minerals and rocks. Repeated and/or
substantial inhalation of airborne crystalline silica can
cause serious or fatal respiratory diseases, including
silicosis.Inaddition, California and some other
authorities have listed respirable crystalline silica as a
substance known to cause cancer. When cutting such
materials, always follow the respiratory precautions
mentioned above.
WARNING
Grinding/cutting/drilling of masonry, concrete, metal and
other materials can generate dust, mists and fumes
containing chemicals known to cause serious or fatal
injury or illness, such as respiratory disease, cancer,
birth defects or other reproductive harm. If you are
unfamiliar with the risks associated with the particular
process and/or material being cut or the composition of
the tool being used, review the material safety data
sheet and/or consult your employer, the material
manufacturer/supplier, governmental agencies such as
OSHA and NIOSH and other sources on hazardous
materials. California and some other authorities, for
instance, have published lists of substances known to
cause cancer, reproductive toxicity,or other harmful
effects.
Control dust, mist and fumes at the source where
possible. In this regard use good work practices and
follow the recommendations of the manufacturers or
suppliers, OSHA/NIOSH, and occupational and trade
associations.Water should be used for dust
suppression when wet cutting is feasible. When the
hazards from inhalation of dust, mists and fumes cannot
be eliminated, the operator and any bystanders should
always wear a respirator approved by NIOSH/MSHA for
the materials being used.
WARNING
SILICOSIS WARNING RESPIRATORY HAZARDS

PAGE 4 — DSGPULW DUOSCREED • OPERATION MANUAL — REV. #8 (06/12/23)
TABLE OF CONTENTS
DSGPULW VIBRATORY
DUOSCREED
Proposition 65 Warning ........................................... 2
Silicosis Warning ..................................................... 3
Safety Information ................................................ 5-9
Safety Decals ................................................... 10-11
General Information............................................... 12
Duoscreed Components........................................ 13
Engine Components.............................................. 14
Assembly Instructions....................................... 15-17
Starting .................................................................. 18
Application/Operation ....................................... 19-22
Maintenance.......................................................... 24
Troubleshooting (Duoscreed) ................................ 25
Troubleshooting (Engine) ...................................... 26
NOTICE
Specications are subject to change without notice.

DSGPULW DUOSCREED • OPERATION MANUAL — REV. #8 (06/12/23) — PAGE 5
SAFETY INFORMATION
Do not operate or service the screed before reading the
entire manual. Safety precautions should be followed at
all times when operating this screed. Failure to read and
understand the safety messages and operating instructions
could result in injury to yourself and others.
SAFETY MESSAGES
The four safety messages shown below will inform you
about potential hazards that could injure you or others. The
safety messages speci cally address the level of exposure
to the operator and are preceded by one of four words:
DANGER, WARNING, CAUTION
or NOTICE.
SAFETY SYMBOLS
DANGER
Indicates a hazardous situation which, if not avoided,
WILL result in DEATH or SERIOUS INJURY.
WARNING
Indicates a hazardous situation which, if not avoided,
COULD result in DEATH or SERIOUS INJURY.
CAUTION
Indicates a hazardous situation which, if not avoided,
COULD result in MINOR or MODERATE INJURY.
NOTICE
Addresses practices not related to personal injury.
Potential hazards associated with the operation of this
screed will be referenced with hazard symbols which may
appear throughout this manual in conjunction with safety
messages.

PAGE 6 — DSGPULW DUOSCREED • OPERATION MANUAL — REV. #8 (06/12/23)
SAFETY INFORMATION
GENERAL SAFETY
CAUTION

NEVER operate this screed without proper protective
clothing, shatterproof glasses, respiratory protection,
hearing protection, steel-toed boots and other protective
devices required by the job or city and state regulations.

NEVER operate this screed when not
feeling well due to fatigue or illness, or when
on medication.

NEVER operate this screed under the in uence of drugs
or alcohol.

ALWAYS check the screed for loosened threads or bolts
before starting.

NEVER use the screed for any purpose other than its
intended purposes or applications.
NOTICE

This screed should only be operated by trained and
quali ed personnel 18 years of age and older.

Whenever necessary, replace nameplate, operation and
safety decals when they become dif cult to read.

Manufacturer does not assume responsibility for any
accident due to equipment modi cations. Unauthorized
modi cation of the screed will void all warranties.

NEVER use accessories or attachments that are not
recommended by Multiquip for this screed. Damage to
the screed and/or injury to the user may result.

ALWAYS know the location of the nearest
 re extinguisher.

ALWAYS know the location of the nearest
 rst aid kit.
ALWAYS know the location of the nearest phone or keep
a phone on the job site.
Also, know the phone numbers
of the nearest ambulance, doctor, and
 re department.
This information will be invaluable in the case of an
emergency.
SCREED SAFETY
DANGER
NEVER operate the screed in an explosive
atmosphere or near combustible materials.
An explosion or  re could result causing
severe bodily harm or even death.
WARNING
NEVER disconnect any emergency or safety devices
.
These devices are intended for operator safety.
Disconnection of these devices can cause
severe injury,
bodily harm or even death
. Disconnection of any of
these devices will void all warranties.
CAUTION
NEVER attempt service on a running screed.
NOTICE
ALWAYS
ensure the screed is on level ground
before use.
ALWAYS read, understand, and follow
procedures in Operator’s Manual before
attempting to operate screed.

Refer to the Engine Owner's Manual for engine technical
questions or information.
ALWAYS keep the screed in proper running condition.

Fix damage to the screed and replace any broken parts
immediately.
ALWAYS
store the screed properly when it is not being
used. The screed should be stored in a clean, dry location
out of the reach of children and unauthorized personnel.

DSGPULW DUOSCREED • OPERATION MANUAL — REV. #8 (06/12/23) — PAGE 7
SAFETY INFORMATION
ENGINE SAFETY
DANGER

The engine fuel exhaust gases contain poisonous carbon
monoxide. This gas is colorless and odorless, and can
cause death if inhaled.

The engine of this screed
requires an adequate, free
 ow of cooling air. NEVER
operate this equipment in
any enclosed or narrow area
where free  ow of the air is
restricted. If the air  ow is
restricted it will cause injury
to people and property and serious damage to the
equipment or engine.

When operating the screed outdoors, DO NOT place the
screed near doors, windows or vents that could allow
carbon monoxide to enter and build up in occupied
spaces.
WARNING

Operation of the screed may create sparks that can
start  res around dry vegetation. A spark arrestor may
be required. The operator should contact local fire
agencies for laws or regulations relating to  re prevention
requirements.
CAUTION

NEVER touch the hot exhaust manifold,
muf er or cylinder. Allow these parts to cool
before servicing the screed.
NOTICE

NEVER run the engine without an air  lter or with a dirty
air  lter. Severe engine damage may occur. Service the
air  lter frequently to prevent engine malfunction.

NEVER tamper with the factory settings of
the engine or engine governor. Damage to
the engine or screed can result if operating
in speed ranges above the maximum
allowable.
DANGEROUS
GAS FUMES
FUEL SAFETY
DANGER
DO NOT
add fuel to equipment if it is placed inside truck
bed with plastic liner. Possibility exists of explosion or
 re due to static electricity.
NEVER
start the engine near spilled fuel or combustible
 uids. gasoline fuel is extremely  ammable and its
vapors can cause an explosion if ignited.
ALWAYS
refuel in a well-ventilated area, away from
sparks and open  ames.
ALWAYS
use extreme caution when working with
 ammable liquids.
NEVER
fill the fuel tank while the engine is
running or hot.
NEVER
over ll the fuel tank. Spilled fuel can ignite if it
comes into contact with hot engine parts or sparks from
the ignition system.
Store fuel in appropriate containers, in well-ventilated
areas and away from sparks and  ames.
NEVER use fuel as a cleaning agent.
NEVER smoke around or near the
equipment. Fire or explosion could result
from fuel vapors or if fuel is spilled on a
hot engine.
PLASTIC
TRUCK-BED
LINER
FUEL
FUEL

PAGE 8 — DSGPULW DUOSCREED • OPERATION MANUAL — REV. #8 (06/12/23)
SAFETY INFORMATION
TRANSPORTING SAFETY
CAUTION

ALWAYS shut down the engine before transporting.

Drain fuel when trasporting DuoScreed over long
distances or bad roads.

NEVER attach a forklift or other lifting device to the lifting
bar. This bar is only for manual lifting on the jobsite.
NOTICE

NEVER lift the equipment while the engine is running.

Tighten fuel tank cap securely and close fuel cock to
prevent fuel from spilling.

DO NOT lift machine to unnecessary heights.

ALWAYS tie down equipment during transport by
securing the equipment with rope or strap.
ENVIRONMENTAL SAFETY/DECOMMISSIONING
NOTICE
Decommissioning is a controlled process used to safely
retire a piece of equipment that is no longer serviceable.
If the equipment poses an unacceptable and unrepairable
safety risk due to wear or damage or is no longer cost
effective to maintain (beyond life-cycle reliability) and is to
be decommissioned (demolition and dismantlement), be
sure to follow the rules below:
NEVER
pour waste or oil directly onto the ground, down
a drain, or into any water source.
Contact your country’s Department of Public
Works or recycling agency in your area and
arrange for proper disposal of any electrical
components, waste or oil associated with
this equipment.
When the life cycle of this equipment is over, remove
the battery and bring it to an appropriate facility for lead
reclamation. Use safety precautions when handling
batteries that contain sulfuric acid.

When the life cycle of this equipment is over, it is
recommended that the frame and all other metal parts
be sent to a recycling center.
Metal recycling involves the collection of metal from
discarded products and its transformation into raw
materials to use in manufacturing a new product.
Recyclers and manufacturers alike promote the process
of recycling metal. Using a metal recycling center
promotes energy cost savings.

DSGPULW DUOSCREED • OPERATION MANUAL — REV. #8 (06/12/23) — PAGE 9
SAFETY INFORMATION
EMISSIONS INFORMATION
NOTICE
The gasoline engine used in this equipment has been
designed to reduce harmful levels of carbon monoxide
(CO), hydrocarbons (HC), and nitrogen oxides (NOx)
contained in diesel exhaust emissions.
This engine has been certi ed to meet US EPA evaporative
emissions requirements in the installed con guration.
Attempting to modify or make adjustments to the engine
emission system by unauthorized personnel without proper
training could damage the equipment or create an unsafe
condition.
Additionally, modifying the fuel system may adversely affect
evaporative emissions, resulting in  nes or other penalties.
Emission Control Label
The emission control label is an integral part of the emission
system and is strictly controlled by regulations.
The label must remain with the engine for its entire life.
If a replacement emission label is needed, please contact
your authorized engine distributor.

PAGE 10 — DSGPULW DUOSCREED • OPERATION MANUAL — REV. #8 (06/12/23)
SAFETY DECALS
SAFETY DECALS
Safety decals are attached to the screed as shown in
Figure 1. Keep these safety decals clean at all times. When
the safety decals become worn or damaged, contact your
nearest dealer or the Multiquip Parts Department.
NOTICE
For safety decal part numbers, reference parts manual.
Figure 1. Operation and Safety Decals

DSGPULW DUOSCREED • OPERATION MANUAL — REV. #8 (06/12/23) — PAGE 11
SAFETY DECALS
Table 1. Screed Specications
Power Unit Model DSGPULW
Number of Vibrations 5,500 v/min
Drive System Flexible Shaft
Noise (Open Air) 50 dB(A)
Vibration Acceleration 1.5 m/sec2
Drive Unit Weight (LW) 29 lbs. (13 Kg.)
Blade Construction Extruded Aluminum Alloy
Blade Widths LW 6, 8, 10, 12, 14 and 16 ft.
(1.82, 2.43, 3.04, 3.65, 4.26, and 4.87 meters)
Blade Weights LW Approx. 1.95 lb./ft. ( 2.9 kg/m)
Table 2. Engine Specications
Engine Make HONDA
Engine Model GX35SAT
Engine Type 4-Stroke OHC Gasoline Engine
Number Of Cylinders 1
Displacement 2.18 cu. in (35.8 cm3)
Maximum Output 1.6 HP/7,000 rpm
Oil Grade SAE 10W-30
Oil Capacity 0.11 qt./(0.10 liter)
Fuel Type Unleaded
Fuel Tank Capacity 172 gal./(.65 liters)
Spark Plug Gap 0.024-0.028 inch (0.60-0.70 mm)
Spark Plug Type CMR5H (NGK)
Starting Method Recoil Start
Weight (Dry) 7.34 lbs. (3.33 kg)

PAGE 12 — DSGPULW DUOSCREED • OPERATION MANUAL — REV. #8 (06/12/23)
GENERAL INFORMATION
Introduction
The Multiquip DuoScreed is a hand held vibratory screed
designed to strike-off and consolidate concrete slabs. It
is comprised of two major components, the power unit
(gasoline engine), and the strike-off blade. Generally
this screed operates ideally in concrete with a slump of 2
inches or greater. Its applications include patios, driveways,
sidewalks and oor slabs.
Assembly
There are no tools required to assemble the DuoScreed.
The power unit (engine) is connected to the to the blade by
means of a spring-loaded clamp. Springs within the clamp
assembly prevent vibration from loosening the power unit
from the blade.
Handle Adjustments
The handle assembly on the DuoScreed is height
adjustable for operator comfort. The handle design used
on this screed allows the operator to remain upright at all
times and can be quickly adjusted without any tools.
Vibratory System
The vibratory system of the DuoScreed produces low
amplitude high frequency vibrations, designed to level and
compact concrete. This vibratory system is mounted at an
angle to transmit vibration laterally and vertically through
the blade to produce a strong, dense slab.
The engine drives a two piece eccentric weight by means of
a one-piece exible shaft. This weight produces a vibratory
action which simultaneously allows the DuoScreed to level
the slab and consolidate the concrete beneath the surface.
Blades
The DuoScreed can utilize various blade widths. This
screed uses a lightweight (LW) type blade. The widths
can range anywhere from 6~16 feet (1.82~ 4.87 meters).
See Table 1 for more detailed information. Since different
length blades will require varying amounts of vibration, the
DuoScreed features adjustable eccentric weights.
NOTICE
Some blade widths may not be available. Please
contact MQ unit sales for available blades.
Engine
The Multiquip DuoScreed is equipped with a Honda Model
GX35SAT, 1.6 HP, mini 4-cycle gasoline engine. This
engine is lightweight and requires no fuel mixing.
Drive System
The Honda 1.6 HP engine drives a exible shaft that
requires no greasing. Its short one piece design runs
directly to the vibrator housing and does not bend. This
type of design eliminates a major source of friction and
reduces the likelihood of shaft failure.

DSGPULW DUOSCREED • OPERATION MANUAL — REV. #8 (06/12/23) — PAGE 13
DUOSCREED COMPONENTS
Figure 2. DuoScreed Components
Figure 1 shows the location of the components of the
DuoScreed. The function of each component is described
below:
1. Start/Stop Switch – When starting the engine, place
this switch in the START position. When stopping the
engine, place in the STOP position.
2. Recoil Starter – Manual-starting method. Pull the
starter grip until resistance is felt, then pull briskly and
smoothly.
3. Oil Cap – Remove this cap to add engine oil.
4. Throttle Control Lever – Move the throttle lever to the
down position for full throttle (max RPM's), for engine
idle, move the throttle lever to the up position.
5. Fuel Cap/ Tank –Remove the fuel tank cap to add
unleaded fuel ONLY! DO NOT mix fuel. DO NOT over
ll. Tank holds approximately .172 gallons (.65 liters).
6. Handle Bar Adjustment Knobs – Loosen these two
knobs to adjust the handle bar to a suitable working
position.
7. Handle Bar – Used in the steering of DuoScreed.
8. Hand Grip –When operating the DuoScreed use this
hand grip to maneuver the machine.
9. Support Stand Latch – Use this latch to lock support
stand in place when DuoScreed is in operation.
10. Support Stand – Use this stand to support the
DuoScreed when not in use.
11. Flexible Drive Shaft – Connected to the drive shaft
of the engine, provides the vibrational force for the
eccentric weights.
12. Shock Mounts – Used to absorb the vibration
generated by the DuoScreed. These shock mounts
minimize the transfer of vibration to the operator.
13. Spring-Loaded Wing Nuts – Turn these 3 spring
loaded wing nuts counterclockwise to release the blade
from the aluminum clamping strip, turn clockwise to
secure the blade to the clamping strip.
14. Blades – The DuoScreed comes equipped from the
factory with LW type blades. Reference Table 1 for
details.
15. Eccentric Cover – Encloses the adjustable eccentric
weights. Press the spring clip tab inward and slide the
cover upward to gain access to the eccentric weights.
16. Locking Nuts – These 3 locking nuts are used in
conjunction with the 3 spring loaded wing nuts which
secure the blade to the aluminum clamping strip.
Important! always cover the two outer nuts with the
provided plastic cap. This will prevent concrete and
other debris from entering the quick disconnect system.
17. Lifting Bar – This bar is only for manual lifting on the
jobsite. Not to be used for manual lifting with a forklift
or other lifting device.
18. Gasoline Engine – This DuoScreed uses a HONDA
GX35SAT 1.6 HP gasoline engine. Refer to the HONDA
owners manual for engine information and related
topics

PAGE 14 — DSGPULW DUOSCREED • OPERATION MANUAL — REV. #8 (06/12/23)
ENGINE COMPONENTS
Figure 3. HONDA GX35SAT Components
1. Spark Plug – Provides spark to the ignition system.
Set spark plug gap to 0.024 - 0.028 inch (0.6 - 0.7 mm)
Clean spark plug once a week.
2. Mufer – Used to reduce noise and emissions. DO
NOT touch mufer while engine is running, let engine
cool before performing any maintenance.
3. Spark Arrester – Prevents sparks from leaving the
engine exhaust system, which could ignite ammable
materials.
4. Starter Grip – Grip this handle to start engine. See
engine starting section of this manual.
5. Recoil Starter (Pull Rope) – Type of engine starting
method.
6. Oil Filler Cap – Remove this cap to add engine oil.
Engine oil capacity is 0.11 quart (0.1 liters). Use SAE
10W-30.
7. Fuel Tank – Holds approximately .172 gallons
(.65 liters) of unleaded gasoline.
8. Fuel Filler Cap – Remove this cap to add unleaded
gasoline to the fuel tank. Make sure cap is tighten
securely. DO NOT over ll.
9. Priming Bulb – Used in the starting of a cold engine
or an engine that has run out of fuel. Press the priming
bulb repeatedly until fuel can be seen inside the clear
plastic bulb.
10. Air Cleaner – Prevents dirt and other debris from
entering the fuel system. Release latch on side of air
lter compartment to gain access to lter element.
11. Choke Lever – Used in the starting of a cold engine,
or in cold weather conditions. The choke enriches the
fuel mixture for starting a cold engine.

DSGPULW DUOSCREED • OPERATION MANUAL — REV. #8 (06/12/23) — PAGE 15
Assembly Instructions
This section will explain how to assemble the DuoScreed.
1. The DuoScreed is comprised of two major components.
The power unit (Honda GX35SAT gasoline engine) and
the strike-off blade. This DuoScreed is equipped with
a quick disconnect system, with which the power unit
can be mounted onto two aluminum clamping strips
with ease.
2. The aluminum clamping strip (retaining plate) is located
at the base of the power unit. This clamping strip is
what holds the blade in place with the aid of three quick
disconnect spring loaded wing nuts (Figure 4) that can
either be tighten or loosened by hand.
NOTICE
It is recommended that you familiarize yourself with the
DuoScreed’s components. For assistance identifying
components called out in the text, refer to Figure 2.
ASSEMBLY INSTRUCTIONS
3. Determine whether you will be using the DuoScreed
on forms or as a wet screed. This will decide how the
power unit will be mounted. If the DuoScreed will be
used as a wet screed the wing nuts should be located
above the smooth edge of the blade. If the DuoScreed
will be used on forms (Figure 4) the wing nuts should
be located above the curled edge of the blade.
4. Loosen each of the three wing nuts about 1/4 inch (8
mm). It is not necessary to completely remove the wing
nuts from the aluminum clamping strip.
5. Locate the two red indicator arrows ) on the top of
the blade. The power unit should be placed squarely
between the two markers.
Figure 4. Blade Quick Disconnect System

PAGE 16 — DSGPULW DUOSCREED • OPERATION MANUAL — REV. #8 (06/12/23)
ASSEMBLY INSTRUCTIONS
Figure 5. Blade Mounting Diagram
6. Place the front of the power unit over the blade
(Figure 5) until the front of the clamp is seated within
the front blade collar.
7. Ease the power unit back to allow the rear clamp to seat
itself within the rear blade collar. It may be necessary
tofurther loosen the wing nuts to allow the clamp to t
around the blade collar.
8. Securely hand tighten each of the three wing nuts.
The wing nuts are spring loaded to prevent them from
coming loose during operation.
9. Two handle bar adjustment knobs (Figure 6) are
located at the base of the steering handle bar. Loosen
these two knobs to adjust the height of the steering
handle bar to a suitable working position.
10. The DuoScreed is now ready for operational use.
Figure 6. Handle Bar Adjustment Knob

DSGPULW DUOSCREED • OPERATION MANUAL — REV. #8 (06/12/23) — PAGE 17
ASSEMBLY INSTRUCTIONS
Eccentric Weight Adjustment
There are two eccentric weights (Figure 7) that are supplied
with the DuoScreed. These weights are located inside the
eccentric weight compartment, which is located at the
bottom of the unit.
Figure 7. Eccentric Weight Location
These weights determine the amount of vibration that will
travel down the blade. Depending on the type of blade that
is used, will determine the position of the two eccentric
weights. Reference Figure 8 in determining how your
eccentric weights should be positioned.
1. To gain access to the eccentric weight compartment,
press the spring clip tab on the eccentric cover and
slide the cover upward to remove.
2. Loosen the eccentric locking wing nut.
3. Use the chart in Figure 8 to determine what position
your eccentric weights should be in (position 1, 2 or 3).
Figure 8. Eccentric Weight Positions

PAGE 18 — DSGPULW DUOSCREED • OPERATION MANUAL — REV. #8 (06/12/23)
STARTING
Engine Pre-Check
1. Fill the fuel tank ( Figure 9) with unleaded gasoline. DO
NOT over ll. Topping-off to ller port is dangerous, as it
tends to spill fuel. Wipe up any spilled fuel immediately.
Figure 9. Fuel Tank
2. Place the engine in a level position.
3. Check the engine oil level by unscrewing the engine
oil dip stick (Figure 10) from its holder.
4. If oil is not observed at the edge of the oil ller hole,
ll with oil until oil is present at edge of oil ller hole.
Remember to add oil slowly to avoid overowing, as
the engine oil tank capacity is small.
Figure 10. Engine Oil Dipstick/Oil Filler Hole
5. Reinstall the engine oil dipstick securely.
Starting The Engine
1. To start a cold engine, move the choke lever (Figure 11)
to the CLOSED position. If restarting a warm engine
leave the choke lever in the OPEN position.
Figure 11. Choke Lever
2. Press the priming bulb (Figure 12) repeatedly until fuel
can be seen inside the clear plastic bulb.
Figure 12. Priming Bulb Location
3. Set the engine START/STOP switch (Figure 13) to the
START position.
Figure 13. Engine START/STOP Switch
4. Pull the starter rope (Figure 14) lightly until you feel
resistance, then pull briskly. Return the starter rope
gently.
Figure 14. Engine Starter Rope
5. Once the engine has started, allow it to idle for 3 to
5 minutes.

DSGPULW DUOSCREED • OPERATION MANUAL — REV. #8 (06/12/23) — PAGE 19
Application/Operation
1. Before placing the DuoScreed in concrete for
screeding, it is a good idea to apply form oil onto the
blade and all rame parts that may come in contact with
the concrete. This form oil will become useful when
cleaning the DuoScreed. Make sure to saturate the
unit with a good amount of form oil.
2. Prepare a grid of #5 rebar pins (Figure 15) equally
spaced approximately every 9 to 11 feet. If a 10 ft.
screed blade is going to be used space the grade pins
every 9 feet, if a 12 ft. screed blade is required, space
the grade pins every 11 ft. Make sure to drive the pins
deeply into the ground.
3. Use a string line or laser to set the pins to grade
(height). The grade should be to the top of the grade
pins. Remember, before any concrete is to be poured,
make sure that the top of the pins are dead on grade.
APPLICATION/OPERATION
4. Once all the grade pins have been placed correctly
and are dead on grade, concrete can then be poured
on top of grade pins.
5. 5. Level, and form the concrete as close as possible
to grade. Mark the top of each pin so that its exact
location will be known. Use a hand trowel to oat the
edges and plumbing grade pins.
6. If chalk lines are used for grade against forms, walls
or existing concrete, oat out the grade with a hand
oat along the edge.
7. Two workers will be required to assist the DuoScreed
operator when making the 12-18 concrete bases, one
on each side. These workers will rake the concrete in
toward the center of the DuoScreed away form the
bases to avoid changing base elevation.
Figure 15. DuoScreed On Forms and Grade Pins

PAGE 20 — DSGPULW DUOSCREED • OPERATION MANUAL — REV. #8 (06/12/23)
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 17. 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 16) 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.
Figure 16. Throttle Lever
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 ofconcrete 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 rst 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 17), overlapping the rst set of grade
pins between 12-18 inches. Repeat this process until
all left edge grade pins have a level base between
12-18 inches wide.
NOTICE
Before placing the DuoScreed in concrete, make
certain the unit has been set up (blade) for wet
screeding. This can be veried by observing that the
operator's toes are pointing towards the smooth side
of the blade (Figure 4), from the operators's position
(handle bars).
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 oated edges and
against plumbing or other outs, leaving the long
unnished 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 unnished 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 16) to the low
speed position (idle).
3. Set the engine ON/OFF switch (Figure 13) 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.