Multiquip DSGPULW User Manual

OPERATION AND PARTS MANUAL

MODEL DSGPULW

DuoScreed LightWeight

(HONDA GX35SAT GASOLINE ENGINE)

Revision #6 (12/10/10)

To find the latest revision of this

publication, visit our website at:

www.multiquip.com

THIS MANUAL MUST ACCOMPANY THE EQUIPMENT AT ALL TIMES.

DSGPULW DUOSCREED — PROPOSITION 65 WARNING

l

PAGE 2 — DSGPULW DUOSCREED — OPERATION AND PARTS MANUAL — REV. #6 (12/10/10)

DSGPULW DUOSCREED — SILICOSSIS WARNING

WARNING

SILICOSIS WARNING RESPIRATORY HAZARDS

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. In addition, 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.

DSGPULW DUOSCREED — OPERATION AND PARTS MANUAL — REV. # 6 (12/10/10) — PAGE 3

DSGPULW DUOSCREED —TABLE OF CONTENTS

Multiquip DS-Series —
Vibratory DuoScreed

Here's How To Get Help ............................................ 3

Table Of Contents ..................................................... 4

Parts Ordering Procedures ....................................... 5

Rules For Safe Operation ...................................... 8-9

Operation and Safety Decals .................................. 10

Specifications .......................................................... 11

General Information ................................................ 12

Components (DuoScreed) ...................................... 13

Components (Honda GX35SAT Engine) ................. 14

Assembly Instructions ........................................ 15-17

Starting ................................................................... 18

Application/Operation......................................... 19-22

Maintenance ...................................................... 23-24

Troubleshooting (DuoScreed) ................................. 25

Troubleshooting (Honds GX35SAT Engine) ............ 26

Explanation Of Codes In Remarks Column ............ 28

Suggested Spare Parts ........................................... 29

Nameplate and Decals....................................... 30-31

Main Assembly ................................................... 32-35

Blade Assembly ................................................. 36-37

Honda GX35SAT Engine

Air Cleaner Assembly .........................................38-39

Cam Pulley Assembly ........................................ 40-41

Carburetor Assembly ......................................... 42-43

Crankcase Assembly ......................................... 44-45

Crankshaft and Piston Assembly ......................46-47

Fan Cover and Clutch/Assembly........................ 48-49

Recoil Starter Assembly.....................................50-51

Flywheel and Ignition Coil Assembly .................52-53

Fuel Tank ............................................................ 54-55

Muffler Assembly ...............................................56-57

Engine Top Cover Assembly .............................. 58-59

Labels ................................................................60-61

Terms and Conditions Of Sale — Parts .................. 62

NOTE

PAGE 4 — DSGPULW DUOSCREED — OPERATION AND PARTS MANUAL — REV. #6 (12/10/10)

Specification and part
number are subject to
change without notice.

l

DSGPULW DUOSCREED — PARTS ORDERING PROCEDURES

Ordering parts has never been easier!

Choose from three easy options:

January 1

Effective:

st

, 2006

Best Deal!

Order via Internet (Dealers Only):

Order parts on-line using Multiquip’s SmartEquip website!

N View Parts Diagrams

N Order Parts
N Print Specification Information

Goto www.multiquip.com and click on

Order Par ts

Order via Fax (Dealers Only):

All customers are welcome to order parts via Fax.
Domestic (US) Customers dial:
1-800-6-PARTS-7 (800-672-7877)

Non-Dealer Customers:
Contact your local Multiquip Dealer for
parts or call 800-427-1244 for help in
locating a dealer near you.

to log in and save!

Order via Phone:

If you have an MQ Account, to obtain a Username
and Password, E-mail us at: parts@multiquip.

com.

To obtain an MQ Account, contact your
District Sales Manager for more information.

Use the internet and qualify for a 5% Discount
on Standard orders for all orders which include
complete part numbers.*

Note: Discounts Are Subject To Change

Fax your order in and qualify for a 2% Discount
on Standard orders for all orders which include
complete part numbers.*

Note: Discounts Are Subject To Change

Domestic (US) Dealers Call:

1-800-427-1244

International Customers should contact
their local Multiquip Representatives for
Parts Ordering information.

When ordering parts, please supply:

R Dealer Account Number
R Dealer Name and Address
R Shipping Address (if different than billing address)
R Return Fax Number
R Applicable Model Number
R Quantity, Part Number and Description of Each Part

NOTICE

All orders are treated as Standard Orders and will

ship the same day if received prior to 3PM PST.

R Specify Preferred Method of Shipment:
UPS/Fed Ex DHL

N Priority One Tr uck 
N Ground
N Next Day
N Second/Third Day

www.multiquip.com

WE ACCEPT ALL MAJOR CREDIT CARDS!

DSGPULW DUOSCREED — OPERATION AND PARTS MANUAL — REV. # 6 (12/10/10) — PAGE 5

DSGPULW DUOSCREED — SAFETY MESSAGE ALERT SYMBOLS

FOR YOUR SAFETY AND THE SAFETY OF OTHERS!

Safety precautions should be followed at all times when operating
this equipment. Failure to read and understand the Safety
Messages and Operating Instructions could result in injury to
yourself and others.

This Owner's Manual has been
developed to provide complete

NOTE

Before using this screed, ensure that the operating
individual has read and understands all instructions in this
manual.

instructions for the safe and
efficient operation of the Multiquip

Model DSGPULW LightWeight
(LW) DuoScreed

engine manufacturers instructions
for data relative to its safe
operation.

Refer to the

HAZARD SYMBOLS

SAFETY MESSAGE ALERT SYMBOLS

The three (3) Safety Messages shown below will inform you
about potential hazards that could injure you or others. The
Safety Messages specifically address the level of exposure to
the operator, and are preceded by one of three words: DANGER,

WARNING, or CAUTION.

Lethal Exhaust Gases

Engine exhaust gases contain poisonous
carbon monoxide. This gas is colorless and

odorless, and can cause death if inhaled.
NEVER operate this equipment in a confined

area or enclosed structure that does not
provide ample free flow air.

Explosive Fuel

GASOLINE is extremely flammable, and its
vapors can cause an explosion if ignited. DO
NOT start the engine near spilled fuel or

combustible fluids. DO NOT fill the fuel tank
while the engine is running or hot. DO NOT
overfill tank, since spilled fuel could ignite if it
comes into contact with hot engine parts or
sparks from the ignition system. Store fuel in

approved containers, in well-ventilated areas
and away from sparks and flames. NEVER
use fuel as a cleaning agent.

DANGERDANGER

DANGER

DANGERDANGER

You WILL be
if you DO NOT follow these directions.

WARNINGWARNING

WARNING

WARNINGWARNING

You CAN be KILLED or
you DO NOT follow these directions.

CAUTICAUTI

CAUTION

CAUTICAUTI

You CAN be
these directions.

Potential hazards associated with the MQ DSGPULW DuoScreed
operation will be referenced with Hazard Symbols which appear
throughout this manual, and will be referenced in conjunction
with Safety Message Alert Symbols.

KILLED

INJURED

if you DO NOT follow

or

SERIOUSLY INJURED

l

SERIOUSLY INJURED

if

Burn Hazards

Engine components can generate extreme heat.
To prevent burns, DO NOT touch these areas
while the engine is running or immediately after
operations. Never operate the engine with heat
shields or heat guards removed.

Rotating Parts

NEVER operate equipment with covers, or

guards removed. Keep fingers, hands, hair and
clothing away from all moving parts to prevent
injury.

PAGE 6 — DSGPULW DUOSCREED — OPERATION AND PARTS MANUAL — REV. #6 (12/10/10)

DSGPULW DUOSCREED — SAFETY MESSAGE ALERT SYMBOLS

Accidental Starting

ALWAYS place the engine ON/OFF switch in

the OFF position when the DuoScreed is not
in use.

Sight and Hearing hazard

ALWAYS wear approved eye and hearing

protection.

Respiratory Hazard

ALWAYS wear approved respiratory

protection.

Equipment Damage Messages

Other important messages are provided throughout this manual
to help prevent damage to your DuoScreed, other property, or
the surrounding environment.

NOTE

This DuoScreed, other property,
or the surrounding environment
could be damaged if you do not
follow instructions.

DSGPULW DUOSCREED — OPERATION AND PARTS MANUAL — REV. # 6 (12/10/10) — PAGE 7

DSGPULW DUOSCREED — RULES FOR SAFE OPERATION

■

DANGER - READ THIS MANUAL!

Failure to follow instructions in this manual may lead to

serious injury

operated by trained and qualified personnel only! This
equipment is for industrial use only.

The following safety guidelines should always be used when
operating the

General Safety:

■

DO NOT operate or service this
equipment before reading this entire
manual.

The operator MUST BE familiar with proper safety
precautions and operations techniques before using
generator.

■

This equipment should not be operated by persons under
18 years of age.

■

NEVER operate this equipment without proper protective
clothing, shatterproof glasses, steel-toed boots and other
protective devices required by the job.

or even

DEATH

! This equipment is to be

MQ DSGPULW DuoScreed.

ALWAYS check the machine for loosened threads or bolts

before starting.

■

NEVER operate the DuoScreed in an explosive
atmosphere or near combustible materials. An explosion
or fire could result causing severe

death.

■

NEVER touch the hot exhaust manifold,
muffler or cylinder. Allow these parts
to cool before servicing engine or
generator.

■

High Temperatures – Allow the engine
to cool before performing service and
maintenance functions. Contact with
can cause serious burns.

■

The engine of the DuoScreed
requires an adequate free flow
of cooling air.
operate the DuoScreed in any
enclosed or narrow area where
free flow of the air is restricted.
If the air flow is restricted it
will cause serious damage to
the engine and may cause injury to people. The
DuoScreed's engine gives off DEADLY carbon monoxide
gas.

NEVER

bodily harm or even

hot!

components

■

NEVER operate this equipment when not
feeling well due to fatigue, illness or taking
medicine.

■

NEVER operate this equipment under the influence or
drugs or alcohol.

■

■

l

■

■

NEVER use accessories or attachments, which are not
recommended by Multiquip for this equipment. Damage
to the equipment and/or injury to user may result.

■

Manufacturer does not assume responsibility for any
accident due to equipment modifications. Unauthorized
equipment modification will void all warranties.

■

Whenever necessary, replace nameplate, operation and
safety decals when they become difficult read.

■

Always refuel in a well-ventilated area, away from sparks and
open flames.

Always use extreme caution when
working with flammable liquids. When
refueling, stop the engine and allow it
to cool. DO NOT
the machine. Fire or explosion could
result from fuel vapors, or if fuel is spilled
on a hot engine.

NEVER operate the DuoScreed in an explosive atmosphere
or near combustible materials. An explosion or fire could result
causing severe

Topping-off to filler port is dangerous, as it tends to spill fuel.
Wipe up any spilled fuel immediately.

smoke around or near

bodily harm or even death.

PAGE 8 — DSGPULW DUOSCREED — OPERATION AND PARTS MANUAL — REV. #6 (12/10/10)

DSGPULW DUOSCREED — RULES FOR SAFE OPERATION

■

ALWAYS read, understand, and follow

procedures in Operator’s Manual before
attempting to operate equipment.

■

ALWAYS be sure the operator is familiar

with proper safety precautions and operations techniques
before using DuoScreed.

■

Refer to the
technical questions or information.

■

NEVER use accessories or attachments, which are not

recommended by Multiquip for this equipment. Damage to
the equipment and/or injury to user may result.

■

NEVER run engine without air cleaner. Severe engine

damage may occur.

■

ALWAYS service air cleaner frequently to prevent carburetor

malfunction.

■

ALWAYS store equipment properly when it is not being

HONDA Engine Owner's Manual

for engine

used. Equipment should be stored in a clean, dry location
out of the reach of children.

Emergencies

■

■

■

■

ALWAYS know the location of the
nearest

fire extinguisher

.

ALWAYS know the location of the
nearest and

first aid kit

.

ALWAYS know the location of the

nearest phone or

the job site,

keep a phone on

in case of emergencies.

ALWAYS have easy access to the phone
numbers of the nearest
and

Fire Department

Ambulance, Doctor

. This information will

be invaluable in the case of an emergency.

Transporting

■

ALWAYS shutdown engine before transporting.

■

Tighten fuel tank cap securely and close fuel cock to prevent
fuel from spilling.

■

Drain fuel when transporting DuoScreed over long distances
or bad roads.

■

ALWAYS tie-down the DuoScreed during transportation by

securing the DuoScreed with rope.

■

NEVER attach a forklift or other lifting device to the lifting bar.
This bar is only for

manual lifting on the jobsite

.

Maintenance Safety

■

■

■

■

■

■

■

NEVER lubricate components or attempt service on a running
machine.

ALWAYS allow the machine a proper amount of time to cool

before servicing.

Keep the machinery in proper running condition.

Fix damage to the machine immediately and always replace
broken parts.

Dispose of hazardous waste properly. Examples of potentially
hazardous waste are used motor oil, fuel and fuel filters.

DO NOT use plastic containers to dispose of hazardous
waste.

DO NOT pour waste, oil or fuel directly onto the ground,
down a drain or into any water source

DSGPULW DUOSCREED — OPERATION AND PARTS MANUAL — REV. # 6 (12/10/10) — PAGE 9

DSGPULW DUOSCREED — OPERATION AND SAFETY DECALS

Machine Safety Decals

The DUOSCREED is equipped with a number of safety decals. These decals (Figure 1) are provided for operator safety and
maintenance information. The illustrations below shows these decals as they appear on the machine. Should any of these decals
become unreadable, replacements can be obtained from your dealer.

l

NOTE

Figure 1. Operation and Safety Decals

PAGE 10 — DSGPULW DUOSCREED — OPERATION AND PARTS MANUAL — REV. #6 (12/10/10)

ALL LW blades will use eccentric
position number 1

is for HD blades.

. Decal DCL 141

DSGPULW DUOSCREED — SPECIFICATIONS

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DSGPULW DUOSCREED — OPERATION AND PARTS MANUAL — REV. # 6 (12/10/10) — PAGE 11

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DSGPULW DUOSCREED — 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 floor 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 flexible 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. The type of
blades are defined as
The widths can range anywhere from 6~20 feet (1.82~ 6.00
meters). See Table 1 for more detailed information. Since different
length blades will require varying amounts of vibration, the
DuoScreed features adjustable eccentric weights. It is also
recommended that two power units be used if 18~20 foot (5.48~

6.0 meters) blades are required.

heavy duty

(HD) or

l

lightweight

(LW).

The blade of the DuoScreed offer a unique design with two
distinct edges and is manufactured from reinforced extruded
aluminum alloy. A curled edge is provided for applications that
allow the blade to ride on top of forms or rails. A smooth edge is
provided for wetscreed applications where the machine rides
entirely on concrete. Plastic end caps allow the blade to maneuver
around obstructions without marring the surface.

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 flexible 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.

Maneuverability

The HD blades have
referenced in Table 1. End caps are provided on each side of the
DuoScreed's blades to allow the screed to be easily maneuvered
around pipes or obstructions. End caps are not used on the LW
blades.

Transport

To transport your DuoScreed simply unclamp the power unit
from its base. Additionally, the handles can be folded down
for storage. The power unit weighs approximately 29 lbs.
(13.0 kg), while the HD blades weigh approximately 2.8 lbs/
ft. (4.2 kg/m) and the LW blades weigh 1.95 lbs/ft (2.9 kg/m)
Figure 2 shows the location of the components of the
DuoScreed. The function of each component is described
on the next page.

end caps

and are available in the lenghts

NOTE

Some blade widths may not be
available. Please contact MQ unit sales
for available blades.

PAGE 12 — DSGPULW DUOSCREED — OPERATION AND PARTS MANUAL — REV. #6 (12/10/10)

Figure 2. DuoScreed Components

DSGPULW 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,

up

move the throttle lever to the

5. Fuel Cap/ Tank – Remove the fuel tank cap to add unleaded
fuel ONLY! DO NOT mix fuel. DO NOT over fill. 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.

position.

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 can be equipped with 2 different
type blade styles HD and LW. See 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. End Caps – Allows the DuoScreed to be maneuvered
around pipe or obstructions. End caps are used with HD
blades

18. 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.

19. Gasoline Engine – This DuoScreed uses a HONDA
GX35SAT 1.6 HP gasoline engine. Refer to the
owners manual for engine information and related topics.

only.

HONDA

DSGPULW DUOSCREED — OPERATION AND PARTS MANUAL — REV. # 6 (12/10/10) — PAGE 13

DSGPULW DUOSCREED — COMPONENTS (HONDA GX35SAT ENGINE)

Figure 2. HONDA GX35SAT Components

1. Spark Plug – Provides spark to the ignition system. Set
spark plug gap to 0.6 - 0.7 mm (0.024 - 0.028 inch) Clean
spark plug once a week.

2. Muffler – Used to reduce noise and emissions. DO NOT
touch muffler 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 flammable 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.

l

7. Fuel Tank – Holds .65 liters (approximately .172 gallon) of

8. Fuel Filler Cap – Remove this cap to add unleaded

9. Priming Bulb – Used in the starting of a cold engine or an

10. Air Cleaner – Prevents dirt and other debris from entering

11. Choke Lever – Used in the starting of a cold engine, or in

unleaded gasoline.

gasoline to the fuel tank. Make sure cap is tighten securely.
DO NOT over fill.

engine that has run out of fuel. Press the priming bulb
repeatedly until fuel can be seen inside the clear plastic
bulb.

the fuel system. Release latch on side of air filter
compartment to gain access to filter element.

cold weather conditions. The choke enriches the fuel mixture
for starting a cold engine.

PAGE 14 — DSGPULW DUOSCREED — OPERATION AND PARTS MANUAL — REV. #6 (12/10/10)

DSGPULW DUOSCREED — ASSEMBLY INSTRUCTIONS

Assembly Instructions

This section will explain how to assemble the DuoScreed.

It is recommended that you familiarize
yourself with the DuoScreed’s

NOTE

1. The DuoScreed is comprised of two major components.
The power unit (Honda GX35SAT Engine) and the strike­off 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 3) that can
either be tighten or loosened by hand.

components. For assistance
identifying components called out in
the text, refer to Figure 1.

3. Determine whether you will be using the DuoScreed on

forms

unit will be mounted
screed the wing nuts should be located above the smooth
edge of the blade. If the DuoScreed will be used on forms
(Figure 3) 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 (Figure 4) on the top of
the blade. The power unit should be placed squarely
between the two markers.

or as a

wet screed

. This will decide how the power

.

If the DuoScreed will be used as a wet

Figure 3. Blade Quick Disconnect System

DSGPULW DUOSCREED — OPERATION AND PARTS MANUAL — REV. # 6 (12/10/10) — PAGE 15

DSGPULW DUOSCREED — ASSEMBLY INSTRUCTIONS

Figure 4. Blade Mounting Diagram

6. Place the front of the power unit over the blade (Figure 3)
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 to
further loosen the wing nuts to allow the clamp to fit 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.

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9. Two handle bar adjustment knobs (Figure 5) 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 5. Handle Bar Adjustment Knob

PAGE 16 — DSGPULW DUOSCREED — OPERATION AND PARTS MANUAL — REV. #6 (12/10/10)

DSGPULW DUOSCREED — ASSEMBLY INSTRUCTIONS

Eccentric Weight Adjustment

There are two eccentric weights (Figure 6) 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 6. 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 7 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 7 to determine what position your
eccentric weights should be in (position 1, 2 or 3).

Example:

A 16 ft. (5.0 meters) blade will place the eccentric weights in
position 3. Please note that

all LW blades widths use position 1.

Figure 7. Eccentric Weight Positions

DSGPULW DUOSCREED — OPERATION AND PARTS MANUAL — REV. # 6 (12/10/10) — PAGE 17

DSGPULW DUOSCREED — STARTING

Engine Pre-Check

1. Fill the fuel tank (Figure 8 ) with unleaded gasoline. DO NOT
over fill. Topping-off to filler port is dangerous, as it tends to
spill fuel. Wipe up any spilled fuel immediately.

Figure 8. Fuel Tank

1. Place the engine in a level position.

2. Check the engine oil level by unscrewing the engine oil dip
stick (Figure 9) from its holder.

3. If oil is not observed at the edge of the oil filler hole, fill with
oil until oil is present at edge of oil filler hole. Remember to
add oil slowly to avoid overflowing, as the engine oil tank
capacity is small.

2. Press the priming bulb (Figure 11) repeatedly until fuel can
be seen inside the clear plastic bulb.

3. Set the engine START/STOP switch (Figure 12) to the

START position.

Figure 11. Priming Bulb Location

Figure 9. Engine Oil Dipstick/Oil Filler Hole

4. Reinstall the engine oil dipstick securely.

Starting The Engine

1. To start a cold engine, move the choke lever (Figure 10) to
the CLOSED position. If restarting a warm engine leave the
choke lever in the OPEN position.

Figure 10. Choke Lever

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Figure 12. Engine START/STOP Switch

4. Pull the starter rope (Figure 13) lightly until you feel resis­tance, the pull briskly. Return the starter rope gently.

Figure 13. Engine Starter Rope

5. Once the engine has started, allow it to idle for 3 to 5 minutes.

PAGE 18 — DSGPULW DUOSCREED — OPERATION AND PARTS MANUAL — REV. #6 (12/10/10)

Application/Operation

DSGPULW DUOSCREED — APPLICATION/OPERATION

1. Before placing the DuoScreed in concrete for screeding,
it is a good idea to apply
frame parts that may come in contact with the concrete.
This form oil will become useful when cleaning the
DuoScreed. Make sure to
amount of form oil.

2. Prepare a grid of #5 rebar pins (Figure 14) 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

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.

or

form oil

saturate the unit with a good

laser

to set the pins to grade (height).

to the blade and all

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. 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 float the edges and
plumbing grade pins.

6. If chalk lines are used for grade against forms, walls or
existing concrete, float out the grade with a hand float
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 14. DuoScreed On Forms and Grade Pins

DSGPULW DUOSCREED — OPERATION AND PARTS MANUAL — REV. # 6 (12/10/10) — PAGE 19

DSGPULW DUOSCREED — APPLICATION/OPERATION

13. Repeat steps 9 through 12 pulling the DuoScreed from
the edge of the grid's
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 unfin­ished areas about 8 or 9 feet wide. Once the bases are
built, the workers can more accurately shape the concrete
to grade.

15. When
his two workers can begin to work down the long parallel

Figure 15. Throttle Lever

Before placing the DuoScreed in
concrete, make certain the unit has

NOTE

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
corner, horizontally toward 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

11. Keep the DuoScreed blade level and create a level base
between 12-18 inches wide.

been set up (blade) for
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).

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center

dead on grade

.

wet screeding

.

top left

. Notice that as the

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

speed.

2. Move the engine

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

has cooled, use a damp and a mild detergent to remove all
concrete and foreign debris. DO NOT spay the engine with
water.

top right

all

the bases have been completed, the operator and

stop

the engine suddenly while running at high

throttle lever

cool

corner, horizontally toward

(Figure 15) to the low

before cleaning. When the engine

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-

left

tween 12-18 inches. Repeat this process until all
grade pins have a level base between 12-18 inches wide.

PAGE 20 — DSGPULW DUOSCREED — OPERATION AND PARTS MANUAL — REV. #6 (12/10/10)

edge

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.