Multiquip DS User Manual

PARTS AND OPERATION MANUAL

DS-Series

DuoScreed

(CHINA)

© COPYRIGHT 2001, MULTIQUIP INC.

Revision #0 (09/19/01)

MULTIQUIP INC

18910 WILMINGTON AVE. 800-427-1244
CARSON, CALIFORNIA 90746 FAX: [phone]
310-537-3700
800-421-1244 800-478-1244
FAX: [phone] FAX: [phone]

E-mail:[e-mail] • www:multiquip.com

Atlanta • Boise • Dallas • Houston • Newark
Montreal, Canada • Manchester, UK
Rio De Janiero, Brazil • Guadalajara, Mexico

..

. PARTS DEPARTMENT:

..

SERVICE DEPARTMENT:

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PAGE 2 — DS-SERIES DUOSCREED — PARTS & OPERATION MANUAL — REV. #0 (09/19/01)

HERE'S HOW TO GET HELP

PLEASE HAVE THE MODEL AND SERIAL NUMBER
ON-HAND WHEN CALLING

PARTS DEPARTMENT

800-427-1244 or 310-537-3700
FAX: [phone] or 310-637-3284

SERVICE DEPARTMENT/TECHNICAL ASSISTANCE

800-478-1244 or 310-537-3700
FAX: [phone]

WARRANTY DEPARTMENT

888-661-4279, or 310-661-4279
FAX: [phone]

MAIN

800-421-1244 or 310-537-3700
FAX: [phone]

DS-SERIES DUOSCREED — PARTS & OPERATION MANUAL — REV. #0 (09/19/01) — PAGE 3

TABLE OF CONTENTS

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

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

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

Rules For Safe Operation ...................................... 6-7

Operation and Safety Decals .................................... 8

Specifications ............................................................ 9

General Information ................................................ 10

Multiquip DS-Series —
Vibratory DuoScreed

Components (DuoScreed) ...................................... 11

Components (Honda GX31SA Engine) .................. 12

Assembly Instructions ........................................ 13-15

Starting ................................................................... 16

Application/Operation......................................... 17-20

Maintenance ...................................................... 21-22

Troubleshooting (DuoScreed) ................................. 23

Troubleshooting (Honds GX31SA Engine).............. 24

Explanation Of Codes In Remarks Column ............ 26

Suggested Spare Parts ........................................... 27

Main Assembly ................................................... 28-31

Name Plate And Decals ..................................... 32-33

Honda GX31SA Engine

Crankcase Assembly .........................................34-35

Camshaft Assembly ...........................................36-37

Piston Crankshaft Assembly ..............................38-39

Carburetor Assembly .........................................40-41

Recoil Starter Assembly.....................................42-43

Flywheel/Ignition Coil Assembly.........................44-45

Fuel Tank............................................................46-47

Air Cleaner Assembly.........................................48-49

Muffler Assembly ...............................................50-51

Clutch/Fan Cover Assembly ............................... 52-53

Engine Cover Assembly .....................................54-55

Terms and Conditions Of Sale — Parts .................. 56

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NOTE

Specification and part number
are subject to change without
notice.

PAGE 4 — DS-SERIES DUOSCREED — PARTS & OPERATION MANUAL — REV. #0 (09/19/01)

PARTS ORDERING PROCEDURES

n

Dealer account number

n

Dealer name and address

n

Shipping address (if different than billing address)

n

Return fax number

n

Applicable model number

n

Quantity, part number and description of each part

n

Specify preferred method of shipment:

UPS Ground

•

UPS Second Day or Third Day*

•

UPS Next Day*

•

Federal Express Priority One (please provide us with your Federal

•

Express account number)*

Airborne Express*

•

Truck or parcel post

•

*Normally shipped the same day the order is received, if prior to 2PM west coast time.

Earn Extra Discounts when

you order by FAX!

All parts orders which include complete part numbers
and are received by fax qualify for the following extra
discounts:

Number of
line items ordered Additional Discount

1-9 items 3%
10+ items** 5%

Get special freight allowances
when you order 10 or more
line items via FAX!**

n

UPS Ground Service at no charge for freight

n

UPS Third Day Service at one-half of actual freight
cost

No other allowances on freight shipped by any other carrier.
**Common nuts, bolts and washers (all items under $1.00 list price)

do not count towards the 10+ line items.

Extra Fax DiscountExtra Fax Discount

Extra Fax Discount

Extra Fax DiscountExtra Fax Discount

for Domestic USAfor Domestic USA

for Domestic USA

for Domestic USAfor Domestic USA

Dealers OnlyDealers Only

Dealers Only

Dealers OnlyDealers Only

Now! Direct TOLL-FREE access

to our Parts Department!

Toll-free nationwide:

800-421-1244

Toll-free FAX:

*DISCOUNTS ARE SUBJECT TO CHANGE*

Fax order discount and UPS special programs revised June 1, 1995

DS-SERIES DUOSCREED — PARTS & OPERATION MANUAL — REV. #0 (09/19/01) — PAGE 5

800/6-PARTS-7 • 800-672-7877

DS-SERIES DUOSCREED — RULES FOR SAFE OPERATION

■

CAUTION:

Failure to follow instructions in this manual
may lead to serious injury or even death!
This equipment is to be 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 DuoScreed

GENERAL SAFETY

■

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

■

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

■

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

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

■

High Temperatures – Allow the engine to cool before adding
fuel or performing service and maintenance functions. Contact

hot

with

■

The DuoScreed engine requires an adequate free flow of
cooling air. Never operate the DuoScreed in any enclosed or

components can cause serious burns.

narrow area where free flow of the air
is restricted. If the air flow is restricted
it will cause serious damage to the
DuoScreed or engine and may cause
injury to people. Remember the
DuoScreed's engine gives off DEADLY
carbon monoxide gas.

■

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.

■

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

■

Always check the machine for loosened threads or bolts before
starting.

■

■

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.

bodily harm or even death.

smoke around or near

PAGE 6 — DS-SERIES DUOSCREED — PARTS & OPERATION MANUAL — REV. #0 (09/19/01)

DS-SERIES 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

HONDA Engine Owner's Manual

for engine

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

Transporting

■

■

■

■

Emergencies

■

Maintenance Safety

■

■

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.

Always know the location of the nearest
and

first aid kit

. Know the location of the nearest telephone.

Also know the phone numbers of the nearest

doctor

and

fire department

. This information will be

fire extinguisher

ambulance

,

invaluable in the case of an emergency.

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

DS-SERIES DUOSCREED — PARTS & OPERATION MANUAL — REV. #0 (09/19/01) — PAGE 7

DS-SERIES DUOSCREED — OPERATION AND SAFETY DECALS

Machine Safety Decals

The DUOSCREED is equipped with a number of safety decals. These decals 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.

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PAGE 8 — DS-SERIES DUOSCREED — PARTS & OPERATION MANUAL — REV. #0 (09/19/01)

DS-SERIES DUOSCREED — SPECIFICATIONS

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DS-SERIES DUOSCREED — PARTS & OPERATION MANUAL — REV. #0 (09/19/01) — PAGE 9

DS-SERIES DUOSCREED — GENERAL INFORMATION

Introduction

This 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.
It takes approximately 2 minutes to assemble the DuoScreed.

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.

Engine

The DuoScreed is equipped with an Honda Model GX31SA, 1.5
HP, mini 4-cycle gasoline engine. This engine is lightweight
and requires no fuel mixing.

Drive System

The Honda 1.5 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

End caps are provided on each side of the DuoScreed's blades
to allow the screed to be easily maneuvered around pipes or
obstructions.

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 weights approximately 34 pounds while
the blades weigh approximately 2.8 pounds per foot.

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 blades ranging in lengths from 4.9 to

19.6 feet (1.5 to 6 meters). 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 16, 18, or 20 foot blades are required.

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.

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PAGE 10 — DS-SERIES DUOSCREED — PARTS & OPERATION MANUAL — REV. #0 (09/19/01)

Figure 2. DuoScreed Components

DS-SERIES DUOSCREED — COMPONENTS

Figure 1 shows the location of the components of the DuoScreed.
The function of each component is described below:

1. Oil Cap – Remove this cap to add engine oil.

2. Fuel 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)

3. Throttle Control – Move the throttle lever to the
position for full throttle (max RPM's), for engine idle, move

up

the throttle lever to the

4. Handle Bar Adjustment Knobs – Loosen these two
knobs to adjust the handle bar to a suitable working position.

5. Handle Bar – Used in the steering of DuoScreed.

6. Hand Grip – When operating the DuoScreed use this hand
grip to maneuver the machine.

7. Support Stand Latch – Use this latch to lock support
stand in place when DuoScreed is in operation.

8. Engine ON/OFF Switch – Set this switch in the ON
position to start the engine, set in the OFF position to stop
the engine.

9. Support Stand – Use this stand to support the DuoScreed
when not in use.

position.

down

11. 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.

12. Blade – The DuoScreed comes in various blade sizes

ranging from 4.95 to 19.6 feet.

13. 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.

14. Eccentric Cover – Encloses the adjustable eccentric

weights.

15. Gasoline Engine – This DuoScreed uses a HONDA

GX31SA engine. Refer to the
engine information and related topics.

16. End Caps – Allows the DuoScreed to be maneuvered

around pipe or obstructions.

17. Flexible Drive Shaft– Connected to the drive shaft of the

engine, provides the vibrational force for the eccentric
weights.

HONDA

owners manual for

10. Shock Mounts – Used to absorb the vibration generated
by the DuoScreed. These shock mounts minimize the
transfer of vibration to the operator.

DS-SERIES DUOSCREED — PARTS & OPERATION MANUAL — REV. #0 (09/19/01) — PAGE 11

18. Lifting Bar– To lift or transport the DuoScreed, grab this

bar .

DS-SERIES DUOSCREED — COMPONENTS (HONDA GX31SA ENGINE)

Figure 2. HONDA GX31SA 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.

PAGE 12 — DS-SERIES DUOSCREED — PARTS & OPERATION MANUAL — REV. #0 (09/19/01)

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.

DS-SERIES DUOSCREED — ASSEMBLY INSTRUCTIONS

Assembly Instructions

This section will explain how to assemble the DuoScreed.

NOTE

It is recommended that you familiarize yourself with the
DuoScreed’s components. For assistance identifying
components called out in the text, refer to the Figure 1.

1. The DuoScreed is comprised of two major components.
The power unit (HONDA GX31SA 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.

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

DS-SERIES DUOSCREED — PARTS & OPERATION MANUAL — REV. #0 (09/19/01) — PAGE 13

DS-SERIES 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.

l

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 14 — DS-SERIES DUOSCREED — PARTS & OPERATION MANUAL — REV. #0 (09/19/01)

DS-SERIES 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, loosen

the two wing nuts on each side of the compartment and lift
the cover.

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 13.9 ft. (4.25 meters) blade will place the eccentric weights in
position 2.

Figure 7. Eccentric Weight Positions

DS-SERIES DUOSCREED — PARTS & OPERATION MANUAL — REV. #0 (09/19/01) — PAGE 15

DS-SERIES 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 ON/OFF switch (Figure 12) to the ON 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

l

Figure 12. Engine ON/OFF 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 16 — DS-SERIES DUOSCREED — PARTS & OPERATION MANUAL — REV. #0 (09/19/01)

Application/Operation

DS-SERIES 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

DS-SERIES DUOSCREED — PARTS & OPERATION MANUAL — REV. #0 (09/19/01) — PAGE 17

DS-SERIES DUOSCREED — APPLICATION/OPERATION

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
unfinished 8 to 9 foot wide middle portions. When moving the
DuoScreed down the middle portions, the ends of the

Figure 15. Throttle Lever

NOTE

Before placing the DuoScreed in concrete, make certain
the unit has been set up (blade) for
can be verfied 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).

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.

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

dead on grade

wet screeding

center

. Notice that as the

l

.

. This

top left

left

edge

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.

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.

all

the bases have been completed, the operator and

stop

the engine suddenly while running at high

throttle lever

cool

before cleaning. When the engine

(Figure 15) to the low

13. Repeat steps 9 through 12 pulling the DuoScreed from
the edge of the grid's
the center.

PAGE 18 — DS-SERIES DUOSCREED — PARTS & OPERATION MANUAL — REV. #0 (09/19/01)

top right

corner, horizontally toward