MBW WS500 User Manual

OPERATOR’S SAFETY

AND SERVICE MANUAL

SCREEDEMON

This manual covers the following serial numbers
and higher for each model listed:

WS500 . . . . . . . . . . . . . . . . . . . 1410030

WET SCREED

MBW, Inc.

250 Hartford Rd • PO Box 440
Slinger, WI 53086-0440
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.mbw.com

MBW (UK) Ltd.

Units 2 & 3 Cochrane Street
Bolton BL3 6BN, England
Phone: [phone]
Fax: [phone]

MBW France S.A.R.L

Z.A. d’Outreville
11 rue Jean Baptiste Néron,
60540 BORNEL, France
Phone: [phone]
Fax: [phone]

L17763 / 10.09.M

©MBW, Inc. 2009

Printed in the USA

TABLE OF CONTENTS

Safety Information . . . . . . . . . . . . . . . . . . . . . . 1

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Safety Decals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . 3

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Before Starting & Operating . . . . . . . . . . . . . . . . . . . . 4

Attaching Blade. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Starting Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Stopping Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Handle Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Kickstand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Transporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Maintenance Schedule. . . . . . . . . . . . . . . . . . . . . . . . 7

Engine Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . 7

Engine Speed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Torque Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Engine Mounting Flange Removal . . . . . . . . . . . . . . . 8

Handle Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Exciter Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Exciter Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Engine Mounting Flange & Engine Assembly . . . . . . 9

Parts Replacement Cycles and Tolerances . . . . . . . 10

Replacement Parts . . . . . . . . . . . . . . . . . . . . .11

Main Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Exciter Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Engine and Engine Mount . . . . . . . . . . . . . . . . . . . . 16

Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

WARNING

CALIFORNIA PROPOSITION 65 WARNING

Engine exhaust and some of its constituents are
known in the state of California to cause cancer,

birth defects, and other reproductive harm.

SAFETY INFORMATION

Introduction

This Safety Alert Symbol is used to call attention
to items or operations which may be dangerous
to those operating or working with this

equipment. The symbol can be found
throughout this manual and on the unit. Please read these
warnings and cautions, along with all decals, carefully
before attempting to operate the unit. Make sure every
individual who operates or works with this equipment is
familiar with all safety precautions.

WARNING

GENERAL WARNING. Indicates information
important to the proper operation of the
equipment. Failure to observe may result in
damage to the equipment and/or severe bodily
injury or death.

CAUTION

GENERAL CAUTION. Indicates information
important to the proper operation of the
equipment. Failure to observe may result in
damage to the equipment.

Safety Precautions

LETHAL EXHAUST GAS: An internal

combustion engine discharges carbon
monoxide, a poisonous, odorless, invisible
gas. Death or serious illness may result if
inhaled. Operate only in an area with proper
ventilation. NEVER OPERATE IN A
CONFINED AREA!

DANGEROUS FUELS: Use extreme caution
when storing, handling and using fuels, as
they are highly volatile and explosive in vapor
state. Do not add fuel while engine is running.
Stop and cool the engine before adding fuel.
DO NOT SMOKE!

SAFETY GUARDS: It is the owner's
responsibility to ensure that all guards and
shields are in place and in working order.

IGNITION SYSTEMS: Breakerless, magneto,
and battery ignition systems can cause severe
electrical shocks. Avoid contacting these
units or their wiring.

SAFE DRESS: Do not wear loose clothing,
rings, wristwatches, etc. near machinery.

NOISE PROTECTION: Wear OSHA specified
hearing protection devices.

EYE PROTECTION: Wear OSHA specified
eye shields, safety glasses, and sweat bands.

FOOT PROTECTION: Wear OSHA specified
steel-tipped safety shoes.

HEAD PROTECTION: Wear OSHA specified
safety helmets.

DUST PROTECTION: Wear OSHA specified
dust mask or respirator.

OPERATOR: Keep children and bystanders
off and away from the equipment.

REFERENCES: For details on safety rules and regulations
in the United States, contact your local Occupational Safety
and Health Administration (OSHA) office. Equipment
operated in other countries must be operated and serviced
in accordance and compliance with any and all safety
requirements of that country. The publication of these
safety precautions is done for your information. MBW does
not by the publication of these precautions, imply or in any
way represent that these are the sum of all dangers present
near MBW equipment. If you are operating MBW
equipment, it is your responsibility to insure that such
operation is in full accordance with all applicable safety
requirements and codes. All requirements of the United
States Federal Occupational Safety and Health
Administration Act must be met when operated in areas that
are under the jurisdiction of that United States Department.

Safety Decals

Carefully read and follow all safety decals. Keep them in
good condition. If decals become damaged, replace as
required. If repainting the unit, replace all decals. Decals
are available from authorized MBW distributors. Order the
decal set listed on the following page(s).

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EXCITER

LOCATION

17768

U.S. PATENT 7,201,537

6,988,851 ; 7,204,659

19379

EXCITER

LOCATION

17768

17770

Safety Decals (Decal Set #17782)

17770

17769

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SPECIFICATIONS

500H

500H 500R

Operating Weight 29 lbs (13.2 kg) 29 lbs (13.2 kg)

Engine Make Honda Robin

Engine Model GX35NTT3 EH035V

Displacement

Spark Plug NGK CMR5H NGK CMR6A

Electrode Gap 0.024 -0.028in (0.6-0.7mm) 0.024 -0.028in (0.6-0.7mm)

Engine Oil Type SAE 10W30 SAE 10W30

Engine Oil Capacity 3.4 oz (0.1L) 3.4 oz (0.1 L)

Fuel Type Regular Unleaded Regular Unleaded

Fuel Tank Capacity 0.17 gal (0.64 L) 0.17 gal (0.64 L)

3

(2.13 in

Blade Specifications

) 35 cm

3

(2.04 in3) 33.5 cm

Part # Width Weight

17804 4 ft (1.21 m) 8.1 lb (3.7 kg)

17806 6 ft (1.83 m) 12.1 lb (5.5 kg)

17808 8 ft (2.44 m) 16.1 lb (7.3 kg)

17810 10 ft (3.05 m) 20.1 lb (9.1 kg)

17812 12 ft (3.66 m) 24.0 lb (10.9 kg)

17814 14 ft (4.27 m) 28.0 lb (12.7 kg)

17816 16 ft (4.88 m) 32.0 lb (14.5 kg)

17818 18 ft (5.49 m) 36.0 lb (16.3 kg)

17820 20 ft (6.10 m) 40.0 lb (18.1 kg)

17824 24 ft (7.32 m) 47.9 lb (21.7 kg)

3

Specifications subject to change without notice

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OPERATION

Float Blade

Exciter

Clamping

Plate

Bolt

Introduction

MBW equipment is intended for use in very severe
applications. They are powered by four cycle engines and
are available in different sizes and a selection of engines.

This parts manual contains only standard parts. Variations
of these parts as well as other special parts are not included.
Contact your local MBW distributor for assistance in
identifying parts not included in this manual.

Before Starting & Operating

• REMEMBER! It is the owner’s responsibility to
communicate information on the safe use and proper
operation of this unit to the operators.

• Review ALL of the Safety Precautions listed on page 1 of
this manual.

• Familiarize yourself with the operation of the machine
and confirm that all controls function properly.

• Know how to STOP the machine in case of an
emergency.

• Make sure hands, feet, and clothing are at a safe
distance from any moving parts.

• OIL LEVEL - Check the oil level in the engine. For more
information see “Lubrication” under the respective
engine’s “Owners Manual” or the Maintenance section of
this manual.

• AIR CLEANER - Check to ensure element is in good
condition and properly installed.

• FUEL SUPPLY - The engines on MBW equipment
require an automotive grade of clean, fresh, unleaded
gasoline.

Figure 1.

5. Set the exciter onto the blade so the rear part of the
exciter casting lines up with the rear cavity of the float
blade.

6. Tighten the clamping plate bolts.

Starting Engine

1. Turn engine switch to “ON”.

2. Press the primer bulb repeatedly until fuel can be
seen in the clear plastic return tube.

3. Choke engine if necessary (you may not need to
choke a warm engine).

4. Pull starter rope repeatedly until engine starts.

5. If choke was moved to the closed position to start,
gradually move it to the open position as the engine
warms up.

6. Allow engine to warm up for one or two minutes.

Stopping Engine

1. Move throttle to idle position.

2. Let engine idle for one or two minutes.

• FUEL FILTER - If clogged or damaged, replace.

Attaching Blade

Refer to Figure 1.

1. Loosen the bolts that secure the clamps to the exciter
assembly.

2. Lay the float blade on the floor with the decals facing
upward.

3. Center the exciter between the “Exciter Location”
decals on the float blade.

4. Tilt the exciter forward and hook the small leg of the
clamping plates under the front lip of the float blade.

3. Turn switch on engine to “STOP” position.

4. Turn off fuel valve.

WARNING

Always stop the engine before:

Adding fuel.

Leaving the equipment unattended for any
amount of time.

Before making any repairs or adjustments to the
machine.

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