Marshalltown SG87SH User Manual

OPERATOR’S MANUAL

Includes Safety, Service and Replacement

Part Information

Model SG87SH

SURFACE SHARK™

Floor Grinder

Do not discard this manual.

Before operation, read and comprehend its contents. Keep

it readily available for reference during operation or when

performing any service related function. When ordering

replacement parts, please supply the following information:

model number, serial number and part number.

Marshalltown, IA

Phone [phone]

Fax [phone]

www.marshalltown.com

MARSHALLTOWN SURFACE SHARK

FLOOR GRINDER WARRANTY PROGRAM

PURPOSE

It is the intention of Marshalltown Company to supply products to the marketplace that reflect the highest
standards for materials, design and manufacture. Each original customer is entitled to receive coverage
as described by the current limited warranty program for the product(s) purchased, regardless of where it
(they) was (were) originally purchased. This program is intended to serve as a method to facilitate the proper
communication procedures for the purpose of obtaining applicable coverage for a product.

WHAT THE LIMITED WARRANTY COVERS

Marshalltown Company warrants that each new and unused product and/or accessory sold by it shall be:

1) Free from defects in material and workmanship under normal use and service for a period of two (2) years
from the original date of purchase.

2) To warrant the labor expenses associated with the defects in material and workmanship for a period of one
(1) year from the original date of purchase.

The warranty period for materials workmanship and labor expenses shall run concurrent from the original date of
purchase (invoice date). No exception to this policy will be made.

The obligation under this warranty program is limited to the current, flat labor rates allowed by it and the
replacement and/or repair at its Fayetteville, Arkansas, factory site, or at an authorized dealer designated by it,
of such part or parts as shall appear upon inspection to have been defective in material and/or workmanship at
the time sold. The part or parts claimed to be defective must be returned to the inspection point, with reasonable
transportation charges prepaid. In the event that the part or parts are determined to be covered by the terms of
the warranty program, Marshalltown Company will reimburse the original purchaser for reasonable transportation
charges. The amount designated, as reasonable transportation charges shall be the sole discretion of
Marshalltown Company. Any part or parts replaced under the terms of the warranty program will carry the
applicable new product warranty. At the time of requesting warranty service, the original purchaser must present
evidence of the purchase date of the part or parts submitted for warranty inspection.

ALLOWABLE FLAT LABOR RATES

Marshalltown Company will pay shop labor repair on warranty at the Marshalltown Company Shop Labor Rate
in existence on the date of the warranty claim. A Marshalltown Company Labor Chart will determine the time
allowed to complete a repair and will govern the shop labor hours that will be allowed.

Marshalltown’s warranty policy will not cover the following; taxes, shop supplies, environment surcharges, air
freight, travel time, loss of rental revenue, or any other charges whatsoever or any liabilities for direct, incidental,
or consequential damage or delay.

Please fill out your Marshalltown Company warranty card and place it in the mail within 24 hours of delivery.

TABLE OF CONTENTS

DESCRIPTION PAGE

NOTICE TO OPERATORS .................................................................................................................4

OPERATOR INSTRUCTIONAL DATA SHEET .................................................................................. 6

SAFETY PRECAUTIONS

Preparation .......................................................................................................................................... 7

Operation ............................................................................................................................................. 9

Maintenance, Repair and Storage ......................................................................................................10

General Safety Information ................................................................................................................. 11

ASSEMBLY

Removing the Floor Grinder from the pallet ........................................................................................ 12

Installing the SG87SH Safety and Dust Shield Assembly Kit ............................................................. 13

OPERATION

Theory of operation .............................................................................................................................13

Multi-Accessory Attachments and Applications .................................................................................. 13

Installing a Multi-Accessory Attachment in the Aluminum Disc .......................................................... 16

Removing a Multi-Accessory Attachment From the Aluminum Disc ................................................... 18

Transporting the Floor Grinder ............................................................................................................ 19

Adjusting the Operator Handle Height ................................................................................................19

Starting the Floor Grinder on the Job Site .......................................................................................... 20

Operating the Floor Grinder on the Job Site ....................................................................................... 22

Stopping the Floor Grinder on the Job Site ........................................................................................ 26

Operational Parameters and Techniques for the Floor Grinder .......................................................... 26

SERVICE

Preventative Maintenance Check List ................................................................................................. 29

Checking V-Belt Tension and Alignment............................................................................................. 29

Installing a Replacement V-Belt or Pulley ........................................................................................... 30

Replacing the Lord® Type Elastomeric Mounts on the Multi-Accessory Disc .................................... 32

Lubrication Requirements ................................................................................................................... 34

Electric Motor Service ......................................................................................................................... 34

TROUBLESHOOTING

Electric Motor ...................................................................................................................................... 34

Operational Problems ......................................................................................................................... 35

STORAGE .......................................................................................................................................... 36

SPECIFICATIONS ............................................................................................................................... 36

REPLACEMENT PARTS DIAGRAMS ................................................................................................37

NOTICE TO OPERATORS

IF YOU CAN NOT READ OR DO NOT FULLY UNDERSTAND THE CONTENTS OF THIS
MANUAL, PLEASE CONTACT THE FACTORY FOR PROPER ASSISTANCE BEFORE
ATTEMPTING TO OPERATE THIS PRODUCT.

SI TU NO PUEDES LE’ER O NO COMPRENDES EL CONTENIDO DE ESTE MANUAL
FAVOR DE PONERSE EN CONTACTO CON LA. FABRICA PARA ASSISTENCIA- A
PROPIA ANTES DE INTENTAR PARA OPERAR ESTE PRODUCTO.

SOLLTEN SIE DIESE GEBRAUCHSANWEISUNG NICHT LESEN KOENNEN ODER ES
NICHT VOLLKOMMEN VERSTEHEN, WENDEN SIE SICH BITTE AN DEN HERSTELLER
FUER RICHTIGE HILFE EHE SIE VERSUCHEN DIESES PRODUKT ZU OPERIEREN.

SI VOUS NE LISEZ OU NE COMPRENDRE ENTIEREMENT LES MATIERES DE
CE MANUEL, S’IL VOUS PLAIT, CONTACTEZ L’USINE POUR L’ASSISTANCE
APPROPRIEE AVANT D’UTILISER LE PRODUIT.

These safety alert symbols identify important safety messages in this manual. When you see these symbols,
be alert to the possibility of personal injury and carefully read the message that follows.

Do not allow anyone to operate the Floor Grinder without first reading this Operator’s Manual and becoming
familiar with its operation. The manufacturer of this Floor Grinder has gone to great extremes to provide the
owner(s) and/or operator(s) with the finest equipment available for its intended job function of providing a
variety of industry recognized surface preparation functions on horizontal floor surfaces. Yet, the possibility
exists that the Floor Grinder can be utilized in and/or subjected to job applications not perceived and/or
anticipated by the manufacturer. Such misuse and/or misapplication of the Floor Grinder can lead to the
possibility of serious damage, injury or even death. It is the responsibility of the owner(s) and/or operator(s) to
determine that the Floor Grinder is being utilized and/or operated within the scope of its intended job function.
It is the responsibility of the owner(s) and/or operator(s) to establish, monitor and constantly upgrade all
safety programs and/or practices utilized in and for the operation of the Floor Grinder. The purpose of such
programs is to provide for owner(s’) and/or operator(s’) safety. Operators must be instructed to recognize
and avoid unsafe conditions associated with their work (29 CFR 1926.21 (b)(2)) and/or applicable updated
revisions. It is the responsibility of the owner(s) and/or operator(s) to determine that no modifications and/or
alterations have been made to the Floor Grinder. Modifications and/or alterations can lead to the possibility
of serious damage, injury or even death. It is the responsibility of the owner(s) and/or operator(s) to make
this Operator’s Manual available for consultation during all phases of operation. Refer to OSHA 2207 and/
or applicable updated revisions which contains all OSHA job safety and health rules and regulations (1926
and 1910) covering construction.

PAGE 4 SG87SH SURFACE SHARK FLOOR GRINDER

The concept of a powered Floor Grinder has been successfully utilized for many years as a practical
solution to many types of surface preparation requirements. The basic concept is proven and well
accepted within the associated marketplace. Use of a Floor Grinder requires strenuous work activity.
This type of work activity can be considered to be greater in magnitude than that experienced with
the use of many other types of both light construction and lawn and garden related equipment. This
type of work activity should only be attempted by operators of adequate physical size and stature,
mental awareness and physical strength and condition. The body parts most noticeably affected
during any specific process are the arms, hands, wrists, shoulders, lower back and legs. The process
can also produce excessive stress/strain directly to the back muscles, spinal vertebrae and many
other body parts. Back related pain can be a side effect of utilizing a Floor Grinder. An operator
with a chronic back related problem or a history of back and/or other medically related problems
should not attempt to utilize the Floor Grinder. Use of the Floor Grinder may only aggravate this
and any other medically related problem. Because of the diverse type of prevailing job applications,
job site conditions, operator experience levels and operator physical characteristics, no warranty,
guarantee, representation and/or liability is made by the manufacturer as to the absolute correctness
or sufficiency of any operational procedure, operational position and/or technique. There is no
absolute guarantee that an operator of any given experience level, physical size and/or physical
condition will be immune to the possibility of and/or probable physical side effects of the normal use
of the Floor Grinder. Each potential operator must be made aware of and assume the operational and
physical liability described and/or associated with the use of the Floor Grinder. Improper use of the
Floor Grinder can result in property damage and/or personal injury, including death. Each potential
operator not willing to assume the operational and physical liability described and/or associated with
the use of the Floor Grinder, should not operate it. Proper levels of operator experience, skill and
common sense are essential for maximizing the safe and efficient operation of the Floor Grinder.

Record the Floor Grinder and engine/electric motor serial numbers in the spaces provided below.

_______________ Model Number

_______________ Serial Number

_______________ Engine/Electric Motor Serial Number

_______________ Date of Purchase

Specifications and design are subject to change without notice or obligation. All specifications are general in
nature and are not intended for specific application purposes. Marshalltown Company reserves the right to
make changes in design, engineering or specifications and to add improvements or discontinue manufacture
at any time without notice or obligation. Marshalltown Company and its agents accept no responsibility for
variations which may be evident in actual products, specifications, pictures and descriptions contained in
this publication.

SG87SH SURFACE SHARK FLOOR GRINDER PAGE 5

OPERATOR INSTRUCTIONAL DATA SHEET

The following undersigned operators of the Floor Grinder described and/or pertaining to this Operator’s
Manual have received formal safety and operational information/instruction from the undersigned owner(s)/
instructor(s) in accordance to OSHA 29 CFR 1926.21 (b)(2) and/or applicable updated revisions pertaining
to, but not necessarily limited to the:

1) READING, COMPREHENSION AND ACKNOWLEDGEMENT OF THE MATERIAL COMPRISING THE
ENTIRE CONTENTS OF THE APPLICABLE OPERATOR’S MANUAL AND SAFETY AND OPERATIONAL
INFORMATION VIDEO FOR THE FLOOR GRINDER.

2) FORMALIZED OPERATOR’S SAFETY PROGRAM TO BE DEVISED BY THE OWNER OF THE FLOOR
GRINDER IN CONJUNCTION WITH THE CONTENTS OF THE APPLICABLE OPERATOR’S MANUAL,
SAFETY AND OPERATIONAL INFORMATION VIDEO TAPE FOR THE FLOOR GRINDER AND THE
APPLICABLE MATERIAL INCLUDED IN THE NATIONAL ELECTRIC CODE®.

3) OSHA AND NATIONAL ELECTRIC CODE® RULES AND REGULATIONS RESEARCHED FOR AND/OR
BY THE OWNER OF THE FLOOR GRINDER AND DEEMED APPLICABLE TO THE SAFE AND PROPER
USE AND/OR OPERATION OF THE FLOOR GRINDER FOR ANY SPECIFIC JOB APPLICATION.

4) LOCAL LAWS, REGULATIONS AND CUSTOMS RESEARCHED FOR AND/OR BY THE OWNER
OF THE FLOOR GRINDER AND DEEMED APPLICABLE TO THE SAFE AND PROPER USE AND/OR
OPERATION OF THE FLOOR GRINDER FOR ANY SPECIFIC JOB APPLICATION.

5) FORMALIZED MAINTENANCE PROGRAM FOR THE FLOOR GRINDER TO BE DEVISED BY THE
OWNER OF THE FLOOR GRINDER IN ACCORDANCE WITH, BUT NOT NECESSARILY LIMITED
TO, THE SPECIFICATIONS, GUIDELINES AND OPERATIONAL INFORMATION CONTAINED IN THE
APPLICABLE OPERATOR’S MANUAL.

6) COMPREHENSIVE OPERATIONAL INSTRUCTIONS FOR THE CORRECT AND PROPER USE OF THE
FLOOR GRINDER AS PER THE CONTENTS OF THE APPLICABLE OPERATOR’S MANUAL, SAFETY
AND OPERATIONAL INFORMATION VIDEO TAPE AND APPLICABLE MATERIAL INCLUDED IN THE
NATIONAL ELECTRIC CODE®.

_______________ Operator _______________ Owner/Instructor __________ Date

_______________ Operator _______________ Owner/Instructor __________ Date

_______________ Operator _______________ Owner/Instructor __________ Date

_______________ Operator _______________ Owner/Instructor __________ Date

_______________ Operator _______________ Owner/Instructor __________ Date

_______________ Operator _______________ Owner/Instructor __________ Date

PAGE 6 SG87SH SURFACE SHARK FLOOR GRINDER

SAFETY PRECAUTIONS

THE FOLLOWING SAFETY PRECAUTIONS
PROVIDE SOME COMMON SENSE GUIDES
TO PROMOTE SAFETY AND EFFICIENCY
WITH THE FLOOR GRINDER. NO WARRANTY,
GUARANTEE OR REPRESENTATION IS MADE BY
THE MANUFACTURER AS TO THE ABSOLUTE
CORRECTNESS OR SUFFICIENCY OF ANY
INFORMATION OR STATEMENT. THESE SAFETY
PRECAUTIONS ARE INTENDED TO DEAL
PRINCIPALLY WITH COMMON PRACTICES AND
CONDITIONS ENCOUNTERED IN THE USE OF
THE FLOOR GRINDER AND ARE NOT INTENDED
TO BE ALL INCLUSIVE. PROPER LEVELS OF
OPERATOR EXPERIENCE, SKILL AND COMMON
SENSE ARE ESSENTIAL FOR SAFE AND EFFICIENT
OPERATION.

TH E DU STS/BYPRODU CTS CREATED
FROM THE PROCESS ASSOCIATED WITH
THE OPERATION OF THE SU RFACE GRINDER
CAN CONTAIN CHEMICALS KNOWN TO THE
STATE OF CALI FORN IA TO C AUSE CANCER ,
BIRTH DEFECTS OR OTHER REPRODUCTIVE
HARM. THIS STATEMENT IS MADE IN COMPLIANCE
TO CALIFORNIA PROPOSITION 65.

INCORRECT USE OF THE FLOOR GRINDER CAN
RESULT IN PROPERTY DAMAGE, PERSONAL
INJURY OR EVEN DEATH. TO REDUCE THIS
POSSIBILITY, GIVE COMPLETE AND UNDIVIDED
ATTENTION TO THE JOB AT HAND AND FOLLOW
THESE SAFETY PRECAUTIONS:

PREPARATION

1) This Floor Grinder is a specialized type of powered
equipment, designed for a specific job function and
requires adequate and thorough instruction BEFORE it
is operated. The size, power, complexity and operating
characteristics of this type of powered equipment would
dictate that each operator must receive adequate,
professional instruction regarding the proper operation
of this Floor Grinder before being allowed to utilize it.

BEFORE attempting to utilize this Floor Grinder, read
this Operator Manual and the material supplied by the
engine/electric motor manufacturer to familiarize each
operator with its correct operating procedures. Avoid
the urge not to take the necessary time to read this
Operator Manual before operating the Floor Grinder. DO
NOT OPERATE THE FLOOR GRINDER UNTIL EACH
OPERATOR COMPLETELY COMPREHENDS THE
CONTENTS OF THIS MANUAL, THE APPLICABLE
SAFETY AND OPERATIONAL INFORMATION
VIDEO, APPLICABLE S U P P L E M E N T A L
I N F OR M A T IO N A N D T H E I N FO R M A TI O N
SUPP LIED BY THE ENGINE/ELECTRIC MOTOR
MANUFACTURER.

2) Develop a comprehensive program for the safe
operation of the Floor Grinder by its owner(s) and/or
operator(s). Such a program will include, but is not limited
to: instructional requirements for operation, applicable
OSHA requirements, local laws and regulations, job
site safety and a Floor Grinder maintenance program.
Constantly examine and upgrade this program to
guarantee owner(s) and/or operator(s) safety. Each
operator must be fully instructed regarding the specifics
of this safety program.

3) Determine that the Floor Grinder is in its original,
factory configuration and has not been modified in any
manner. Many modifications can result in potentially
dangerous configurations that can lead to property
damage and/or personal injury. If there are any questions
about possible modifications made to the Floor Grinder,
contact the Customer Service Department for specific
information BEFORE utilization. There is no charge for
this service. Do not operate the Floor Grinder without
the use of the original equipment V-belt guard. Use of
the Floor Grinder without an approved belt guard can
lead to property damage and/or personal injury.

4) Minors should never be allowed to operate the Floor
Grinder. Bystanders, especially children and animals,
should not be allowed in the area where the Floor
Grinder is in use. The grinding process can result
in flying particles being emitted at high velocity and
striking the operator and/or onlookers. This can lead
to the possibility of property damage and/or personal
injury. Keep all body parts, loose clothing, foreign
objects and onlookers clear of the rotating discs, multi­accessory attachments and flying particles.

SG87SH SURFACE SHARK FLOOR GRINDER PAGE 7

5) Operators must be in adequate physical condition,
mental health and not under the influence of any
substance (drugs, alcohol, etc.) which might impair
vision, dexterity or judgment. Working with the Floor
Grinder is strenuous. If you have any condition that
might be aggravated by strenuous work, check with
your doctor BEFORE operating the Floor Grinder.
Guard against the possibility of back related injuries.
Always lift the Floor Grinder with leg muscles and not
with the back. Use of the Floor Grinder requires that
the operator be of proper height, weight and strength
to maximize operational efficiency and minimize the
possibility of personal injury.

10) Visually inspect the Floor Grinder, components,
tools and accessories for damaged or worn parts.
BEFORE each use:

a) Disconnect the engine spark plug wire or power
source cable.

b) Clean and remove all accumulated foreign matter
from the wheels and determine that each rotates
freely.

c) Clean and remove all accumulated foreign matter
from inside the main frame area.

6) Prolonged use of the Floor Grinder (or other,
similar machines) exposes the operator to vibrations
which may produce Whitefinger Disease (Raynaud’s
Phenomenon). This phenomenon reduces the hand’s
ability to feel and regulate temperature, produces
numbness and burning sensations and may cause
nerve and circulation damage and tissue necrosis.
Antivibration systems do not guarantee that you will not
sustain Whitefinger Disease. Therefore, continuous
and regular users should closely monitor the condition
of their hands and fingers. After each period of
use, exercise to restore normal blood circulation. If
any of the symptoms appear, seek medical advice
immediately.

7) Clothing must be sturdy and snug fitting, but allow
complete freedom of movement. Never wear loose
fitting jackets, scarves, neckties, jewelry, flared or
cuffed pants or anything that could become caught on
controls or moving parts. Wear long pants to protect
your legs. Protect your hands with heavy duty, nonslip
gloves to improve your grip. Good footing is most
important when operating the Floor Grinder. Wear
sturdy boots with nonslip soles. Steel-toed safety
shoes are highly recommended. Never wear tennis
shoes or other, similar type shoes which afford little
or no protection. Wear an approved safety hard hat to
protect the operator’s head where there is a danger of
head injuries.

8) Noise, generated by the engine and/or the actual
grinding process itself, can damage your hearing. A
gasoline engine powered Floor Grinder operates with a
noise emission greater than 70dBA. Hearing protection
is required while operating or when near operating
equipment. Continuous and regular operators should
have their hearing checked regularly.

9) Flying debris, generated by the grinding process,
can cause eye injury. Eye protection is required while
operating or when near operating equipment.

d) Inspect the V-belt drive system for proper tension,
wear and general condition. Replace each component
as necessary.

e) Inspect the multi-accessory disc and gimbal head
assembly for excessive wear and structural integrity.
Replace each component as necessary. The multi­accessory disc rotating at high speed during the
specific process can be subject to high wear rates if the
installed attachment is not properly maintained and/or
replaced at regular service intervals.

f) Determine that operator controls work freely, all
safety devices are operative and information decals
are readable.

g) Check to see that the Floor Grinder and all
related accessories are in good, mechanical condition
BEFORE utilization.

h) Reconnect the spark plug wire or power source
cable as applicable.

9) Contact appropriate representatives to determine if/
where electrical cables, gas lines and other hazardous
items are buried under the work surface BEFORE
utilization. The Floor Grinder and related accessories
are not insulated. Contact with buried electrical cables,
gas lines and other hazardous items can result in
electrocution and/or an explosion.

11) Know how the controls operate. Know how to stop
the engine or electric motor quickly in an emergency.
Always start the engine or electric motor according to
the instructions as outlined in this manual to minimize
the possibility of unexpected contact with the work
surface. Unexpected contact with the work surface can
cause loss of machine control, and the possibility of
property damage and/or personal injury.

PAGE 8 SG87SH SURFACE SHARK FLOOR GRINDER

12) Ground an electrically powered Floor Grinder
motor securely. Determine that any “grounding” wire
and/or device is, in fact, properly grounding the motor.
Failure to properly ground the motor may cause
an electrical shock and/or electrocution, resulting
in property damage and personal injury including
death. Electrical wiring and all connections should
be performed by a qualified electrician. Operating the
electric motor from an improper voltage/amperage
power source can result in property damage and/or
personal injury.

13) When operating an electrically powered Floor
Grinder on a surface containing water or other
electrically conducting liquid, special precautions
must be taken to minimize the possibility of operator
electrocution. One such precaution is to wire and
operate the electric motor from a clean, 20 Ampere,
115 Volt AC, power source in conjunction with a
ground fault circuit interrupter (GFCI). A GFCI is a
safety device that disconnects power from a circuit to
a load when a potentially dangerous condition occurs.
The GFCI opens the circuit when the fault current flow
from a power line to a ground exceeds the safe limit for
humans. The GFCI protects against harmful electrical
shock to a person caused by contact with a defective
electrical product. A GFCI differs from a fuse or circuit
breaker. A fuse or circuit breaker opens the circuit
when the total current flow in the power line exceeds
the safe limit of the power line. They are designed
to protect against fire caused by overheating of the
power line. Use of a GFCI gives on the job protection
from electrical shock hazards caused by ground faults
in commercial, industrial and residential applications.
They are simple and easy to use: plug a portable GFCI
into any suitable, grounded extension cord and plug
the Floor Grinder into the GFCI for automatic protection
against ground faults. For specific information, consult
current National Electrical Code® publications and
OSHA publications 210-22D (or current revision) for
construction sites and 555-3 (or current revision) for
use around any area containing water.

14) Never exceed the recommended capacities of the
Floor Grinder. Refer to the Specifications section of
this manual for more detailed information.

OPERATION

1) Give complete and undivided attention to the job at
hand. Do not chew gum, smoke and/or use smokeless
tobacco while utilizing the Floor Grinder. Do not
attempt to eat and/or drink while utilizing the Floor
Grinder. Determine that eyeglasses and/or hearing aid
devices and other medical related devices are properly

secured. Keep shoes properly laced. Use of the Floor
Grinder is strenuous and causes fatigue. Help prevent
the cause of an accident. Plan to take work brakes as
required to help maintain proper mental and physical
alertness.

2) This Floor Grinder is not sealed or insulated. Do
not operate this machine in an explosive atmosphere
or near combustible materials. Refer to current OSHA
and National Electric Code® rules and regulations.

3) The Floor Grinder is designed for use by one
operator. Use of the Floor Grinder by more than one
operator can lead to confusion and loss of control,
resulting in property damage and/or personal injury.
Never operate the Floor Grinder with an improper
number of operators. Such a configuration can result in
property damage and/or personal injury. If it is felt that
more than one person is required to operate the Floor
Grinder, STOP and contact the Customer Service
Department for specific operational and service/
maintenance information. There is no charge for this
service.

4) Do not operate the Floor Grinder with onlookers
close by. Caution all onlookers to stand clear. The
grinding process can result in flying particles being
emitted at high velocity and striking the operator and/
or onlookers This can lead to the possibility of property
damage and/or personal injury. Wear proper safety
eyewear Keep all body parts, loose clothing and
foreign objects clear of the rotating disc.

5) Start the engine or electric motor according to the
instructions as outlined in this manual to minimize the
possibility of unexpected contact with the work surface.
Unexpected contact with the work surface can cause
the loss of machine control and the possibility of
property damage and/or personal injury.

6) Start and operate a Floor Grinder or a vacuum

system that is powered by a gasoline engine only
in a well ventilated area. Carbon Monoxide fumes
given off by an engine are poisonous. Breathing
these fumes can result in property damage and/
or personal injury. Operate the Floor Grinder only

when/where visibility and light are adequate for the
job at hand. Work carefully. Always hold the operator
handle firmly with both hands. Wrap your fingers
around the handle, keeping it cradled between your
thumbs and fingers. Always make sure the operator
handle is in good condition and free of moisture, pitch,
oil or grease. Wear gloves to improve your grip. Never
leave the Floor Grinder running unattended.

SG87SH SURFACE SHARK FLOOR GRINDER PAGE 9

8) Special care must be exercised on slippery conditions
and on difficult, uneven surfaces. Watch for cracks,
high spots and other, surface irregularities. Keep
proper footing and balance at all times. The normal use
of this machine is on level surfaces. Other terrains can
be dangerous and should be avoided. Only properly
trained operators should attempt these techniques.

9) Never start the engine or electric motor with the
Floor Grinder directly over cracked, uneven or irregular
surfaces. Contact with these types of obstructions
during the starting process can reduce machine
control, resulting in property damage and/or personal
injury. Start the engine or electric motor according to
the instructions as outlined in this manual.

10) Contact with a hot engine muffler of an engine
can cause property damage and/or personal injury.
Remain clear of a hot engine muffler. Do not over
speed the engine by altering the governor setting or by
disconnecting the engine governor. Serious damage to
the engine and/or personal injury can result.

11) Clean and remove all accumulated foreign matter
from inside the main frame area after each use. This
practice will maximize bearing and V-belt service life.

12) Because this Floor Grinder is classified as a
low cost, hand held, low horsepower, portable type
machine, it is limited in the number of practical and/or
suitable job applications. A particular job site, actual
surface conditions, job specifications and operator
skill/common sense may dictate that a different type
of machine (with characteristics of higher purchase
cost, being mounted to a carrier vehicle, with greater
horsepower and less mobility), method and/or process
be utilized to properly complete the job with the
degree of efficiency and safety required. Contact the
Customer Service Department for specific information
regarding suitable job applications, job sites surface
conditions and operator experience/skill/common sense
recommendations for this Floor Grinder BEFORE
utilization. There is no charge for this service.

MAINTENANCE, REPAIR AND STORAGE

1) Use only genuine, approved replacement parts and
accessories for maintenance and repair. Use of parts
and accessories manufactured by others can result in
property damage and/or personal injury.

2) Follow the Service instructions as outlined in the
appropriate section of the Operator Manual.

3) Always stop the engine and disconnect the spark

plug wire or power source cable BEFORE checking or
working on the Floor Grinder.

4) Always properly maintain the Floor Grinder.
Frequently check all fasteners and individual parts.
Built in safety features are effective only if they are
maintained in good working condition. Replace any
questionable part or assembly with a genuine, factory
approved, replacement part. Do not forsake proper
maintenance for the price of a few replacement parts.
Proper maintenance does not cost... it actually pays
dividends. Do not attempt any maintenance repair
work not described in this manual. Have such work
performed at your dealer’s service facility.

5) A worn or damaged engine muffler is a fire hazard
and may cause loss of hearing. Check to see that the
muffler is in good condition. If the muffler is equipped
with a spark arresting device, determine that it is in
proper working condition at regular service intervals.
Replace the spark arresting device with an approved
replacement if there is any question of its integrity. It is
the responsibility of the owner(s) and/or operator(s) to
provide for and properly maintain a USDA approved,
spark arresting muffler in an operating area specified
by law. Check with appropriate governing agencies
for more specific information. The Floor Grinder must
not be operated if the muffler is faulty or has been
removed. Contact with a hot engine muffler can cause
property damage and/or personal injury.

6) Do not operate the Floor Grinder without the use
of a factory approved V-belt guard that is maintained
in proper structural condition. Frequently inspect the
belt guard for signs of wear, cracks and other signs of
fatigue. If there is any question regarding the structural
integrity and/or condition of the belt guard, properly
dispose and replace with a genuine, factory approved,
replacement part only.

7) Maintain all safety and operation decals in proper
condition. If any decal becomes damaged and/or
unreadable, replace with a genuine, factory approved,
replacement part only.

8) The Floor Grinder utilizes many self locking hexagon
head nuts to minimize the effects of vibration. Replace
all self locking hardware with genuine, factory approved,
replacement parts only.

9) Consult the information supplied by the engine or
electric motor manufacturer for specific information
relative to proper operational, lubrication and storage
requirements.

PAGE 10 SG87SH SURFACE SHARK FLOOR GRINDER

GENERAL SAFETY INFORMATION

Physical Exertion

Operating the Floor Grinder requires proper physical stamina and mental
alertness.
Improper operation can result in physical injury and/or damage to the
machine.
Operators must be alert and of proper physical size and condition.

Noise

Use of the Floor Grinder can produce a noise emission level grater then
70dba. Exposure to high noise emission levels can result in hearing loss
or damage. Wear hearing protection when near or operating the Floor
Grinder.

Flying Debris

Use of the Floor Grinder can result in flying debris.
Contact with flying debris can result in personal injury.
Wear eye protection and appropriate safety apparel when near or operating
the Floor Grinder.

Burn Danger

An engine muffler or an electric motor can become hot.
A hot muffler or electric motor can result in personal injury.
Do not touch a hot engine muffler or electric motor.

Rotating Disc Entrapment

The dust and safety shield does not provide complete protection against
contact or entrapment.
Body contact with the rotating disc can result in personal injury.
Do not come in contact with the rotating multi-accessory disc.

Body Strain

Use of the Floor Grinder can result in body strain.
Strain can inflict damage to lower back and upper body parts.
Minimize the effects of strain by operating the Floor Grinder with proper
operating positions.

Kickback

Rotating disc contact with a floor joint, anchor bolt or other obstruction can
thrust the handle toward the operator with a sharp, counter-clockwise rotation
called kickback. Kickback forces can inflict damage to hands, arms and other
upper body parts. Assume a proper operating position when operating the
Floor Grinder to maximize control and minimize the effects of kickback

SG87SH SURFACE SHARK FLOOR GRINDER PAGE 11

ASSEMBLY

The SG87SH Floor Grinder is shipped from the factory
secured on a specially designed wooden pallet and
protected from external damage by a corrugated
carton or wood crate. If shipped with a corrugated
carton, the Floor Grinder can be secured to the pallet
by wood laths nailed to the pallet body. Remove the
carton or crate immediately upon receipt using suitable
tools to remove the nails.

REMOVING THE FLOOR GRINDER FROM THE

PALLET

Application: SG87SH SURFACE SHARK

Tools Required:

1 each, pliers.
1 each, claw hammer or a hammer and an
appropriate pry bar.

The Floor Grinder is secured to the pallet with steel
banding. Using the pliers, cut and remove the banding.
The Floor Grinder can then be removed from the
pallet.

1) To contain loose materials within the platform area
of the Floor Grinder as a direct result of a specific
process. This includes materials removed from the
surface as well as any slurry mixture utilized to help
maximize material removal efficiencies.

2) To provide a method for a vacuum system to
help remove airborne, dust-related materials from
within the skirt assembly. Dust related materials are
usually created as a result of any specific process.
A specific job application may require the reduction
and/or minimization of airborne dust related materials
from the atmosphere while the Floor Grinder is being
operated. The kit includes a hose and necessary
hardware to connect the skirt assembly to the 3 inch
diameter vacuum attachment fitting located at the rear
of the machine. Use of the kit along with a suitable
vacuum system will not completely remove all airborne
and loose materials directly from the work surface.

THE SAFETY AND DUST SHIELD ASSEMBLY KIT IS
RECOMMENDED FOR USE WHERE AND/OR WHEN
PERMITTED ON SPECIFIC JOB APPLICATIONS TO
MAXIMIZE OVERALL SAFETY AND PRODUCTIVITY.
FINAL DISCRETION IS THE RESPONSIBILITY OF
THE OWNER(S) AND/OR OPERATOR(S).

WEAR SAFETY GLASSES AND OTHER
APPROPRIATE SAFETY APPAREL WHEN CUTTING
THE STEEL BANDING AND/OR REMOVING THE
CORRUGATED/WOOD SHIPPING CRATE.

Visually inspect the shipment for freight damage
and/or missing parts. If shipping damage is evident,
contact the delivering carrier immediately to arrange
for an inspection of the damage by their claims
representative. Federal law requires that a claim be
filed within a specific time period. If missing parts
are detected, notify your dealer who will assist you in
obtaining them.

The Floor Grinder is shipped from the factory completely
assembled. If ordered with the Floor Grinder, multi­accessory attachments can be shipped separately to
minimize the potential for loss during shipment.

Check all fasteners for proper security. Consult a
fastener torque chart for the proper torque value if any
fastener is found to require retorquing.
The Safety and Dust Shield Assembly Kit is included
as a standard feature. The Safety and Dust Shield is
designed to perform the following job functions:

THE USE OF THE SAFETY AND DUST SHIELD
ASSEMBLY KIT ALONG WITH A SUITABLE
VACUUM SYSTEM TO REMOVE HAZARDOUS
CLASSIFIED, AIRBORNE MATERIALS FROM
THE WORK SURFACE WILL NOT ELIMINATE
THE REQUIREMENT FOR PROPER SAFETY
RELATED EQUIPMENT, OPERATING PLAN AND/
OR PROCEDURES.

USE OF THE SAFETY AND DUST SHIELD
ASSEMBLY KIT ALONG WITH A SUITABLE
VACUUM SYSTEM WILL NOT COMPLETELY
REMOVE ALL LOOSE MATERIALS FROM THE
WORK SURFACE. HAZARDOUS CLASSIFIED,
LOOSE MATERIALS MUST BE REMOVED FROM
THE WORK SURFACE BY PROCESSES AND/OR
PROCEDURES MEETING THE APPLICABLE OSHA
AND/OR EPA REQUIREMENTS.

PAGE 12 SG87SH SURFACE SHARK FLOOR GRINDER

INSTALLING THE SG87SH SAFETY AND DUST

SHIELD ASSEMBLY KIT

Application: SG87SH SURFACE SHARK

The SG87SH Floor Grinder is shipped from the
factory with the SG87SH-1000 Safety and Dust Shield
Assembly Kit installed. Because of the main frame
design configuration, normal use of the Floor Grinder
will place the rotating multi-accessory disc in close
proximity to vertical obstructions, including walls,
machinery and body parts. Normal operation of the
Floor Grinder is with the kit installed. If a specific job
application requires the removal of the safety and dust
shield, con tact the Customer Service Department for
assistance.There is no charge for this service.

3) Adequate horsepower capable of propelling the
multi-accessory attachment against the work surface
to deliver acceptable productivity rates.

Since no two materials are exactly alike, no two work
surface materials can be penetrated and removed by
the exact same method. The nature of the grinding
process, along with operator experience, skill and
common sense, would suggest that efficient and
productive material removal is a matter of trial and
error. Combinations of multi-accessory attachment
type, condition, and feed rate are direct factors that
will also determine the overall success of the job
application.

MULTI-ACCESSORY ATTACHMENTS AND

APPLICATIONS

Application: SG87SH SURFACE SHARK

D O N O T O P E R A T E T H E S G 8 7 S H
SURFACE GRINDER WITHOUT THE SG87SH­SAFETY A N D DUST SHIE L D A S SEMBLY KI T
PROPERLY INSTALLED.

OPERATION

THEORY OF OPERATION

Application: SG87SH SURFACE SHARK

The SG87SH Floor Grinder operates on the principle of
multi-accessory attachments being utilized at rotational
speeds to make direct contact with a work surface.
Various types of multi-accessory attachments are
secured to recesses provided in the aluminum disc
located on the bottom of the machine. The specific
type of multi-accessory attachment utilized during the
grinding process directly affects the type of material
removed, the material removal rate and the resulting
flatness and smoothness of the surface.

The grinding process is directly controlled by these
conditions:

While individual multi-accessory attachment design and
configuration may vary, basic operational characteristics
are identical: impact upon a work surface material and
remove a percentage of the material. This common
operational characteristic has led to the development
of the following popular multi-accessory attachments:

Grinding Stones

Grinding stones are offered in C10 coarse. All stones
incorporate silicon carbide as the abrasive medium
and employ a clay binder as the matrix material.
Vitrified type stones utilize an oven baking process that
produces greater service life over other manufacturing
processes. As the clay material wears away, it
exposes new, sharp, edges of the imbedded silicon
carbide material. All stones have the identical 2" x 2" x
4" dimensions and are secured to the machine by the
use of a hardwood or plastic wedge. FIGURE 1.

1) The use of a suitable mechanism (multi-accessory
attachment) of proper design and configuration to grind
the work surface and remove material while delivering
acceptable service life.

2) Sufficient static weight supporting the multi- accessory
attachment to allow it to effectively penetrate the work
surface and remove material.

FIGURE 1

SG87SH SURFACE SHARK FLOOR GRINDER PAGE 13

The designation system for the grinding stones utilizes
a system similarly utilized for most abrasive products:
the larger the number, the finer the grain structure and
usually, the smoother the resulting finish.

C10 coarse grade stones are the most popular utilized
stones and result in maximum material removal
rates. They are utilized for general grinding and the
removal of trowel marks, high spots and rough sections
on concrete surfaces. The average service life is
approximately 4 to 10 hours.

SHARK TOOTH Industrial Floor Coatings Removal
System

This multi-accessory attachment is designed to remove
many urethanes, epoxies, paints, mastics and other,
similar material accumulations from concrete floor
surfaces. FIGURE 2. Each assembly utilizes two
tungsten carbide inserts set at a precise angle. The
rotating inserts “cut and shave” against the work
surface material with a “scraping” action that removes
materials with highly productive results. To increase
the effectiveness of the inserts, the scraper block
design incorporates a Lord® type rubber mount that
helps absorb damaging shocks while allowing the
inserts to more easily follow local variations in the
surface contour. Units are secured to the machine with
hardwood or plastic wedges.

(ie: 5 mill thickness and thinner) urethane coatings
present a much more difficult removal problem. Since
removal rates are also directly affected by applied
down force. Up to 150 lbs of external weight can be
added to the Floor Grinder to increase productivity.
Cement blocks or stacked bags of cement make
excellent weights and can be secured with “bungy”
cords or other means with the provided holes in the top
cover. FIGURE 3.

FIGURE 3

Each insert provides eight scraping edges. As an edge
becomes dull and worn, the insert can be turned and
reinstalled to expose a new, sharp edge. FIGURE 4.
When all four edges of one side become worn and dull,
the insert can be turned over to expose an additional
four edges.

Many materials such as adhesives, rubber deposits
and mastics have the tendency to extrude or smear
rather than shear from the concrete floor material.
The occurrence is also aggravated by higher ambient
temperatures. This problem can be significantly
reduced with the addition of various amounts of water
or a water saturated, fine sand combination placed
on the floor. The use of the SG87SH Safety and
Dust Shield Assembly with the Floor Grinder is highly
recommended to contain the water/sand slurry mixture

FIGURE 2

The productivity of the product is directly dependent
upon the yield and tensile strength of the material being
removed. Material thickness has also shown to have a
direct effect on overall productivity. For example, the
SHARK TOOTH system is a highly productive method
for removing thick paint accumulations from factory
floors. Production rates of up to several hundred square
feet per hour can be realized. However, many thin film

from damaging surrounding walls and other vertical
surfaces. FIGURE 5.

PAGE 14 SG87SH SURFACE SHARK FLOOR GRINDER

FIGURE 4

2) Remove the cap screw from the unit. Clean the
newly exposed areas of the insert and SHARK TOOTH
unit with the safety solvent. Clean and inspect the
threaded holes found in older units for excess wear.
SHARK TOOTH units feature a through hole design.

3) Index the insert to expose a new edge. Reinstall the
cap screw (lock washer and hexagon nut on new style
units) and apply a torque value that properly seats the
insert firmly against the body of the unit.

An insufficient seating torque value will allow
the insert to become loose from the unit body,
resulting in premature component wear and
improper scraping action. An excessive torque
value will strip the threads of the cap screw or unit
body.

4) Determine that the unit body is free to rotate about
the 5/16 inch diameter cap screw that retains the body
to the unit. A body that does not freely rotate indicates
that a material build-up exists between the rubber
mount and retaining cap screw. This build-up must
be removed by disassembling the body from the unit
and cleaning all contact areas with the safety solvent.
FIGURE 6.

FIGURE 5

To index the tungsten carbide insert, proceed as
follows:

Tools required:

1 each, 5/32 inch Allen wrench.
1 each, 7/16 inch wrench.

1) Clean the SHARK TOOTH unit with a suitable safety
solvent to remove excess material build-up. Remove
as much foreign material as possible from the female
hexagon socket area of the cap screw. This will allow
the wrench to make full contact and maximize the
torque transfer to the cap screw.

Follow all safety precautions for the safety
solvent.

The SHARK TOOTH system is designed to be installed
with the edge of the tungsten carbide inserts facing the
direction of rotation. Markings are provided to indicate
proper direction of rotation.

FIGURE 6

SG87SH SURFACE SHARK FLOOR GRINDER PAGE 15

INSTALLING A MULTI-ACCESSORY

ATTACHMENT IN THE ALUMINUM DISC

Installing the SHARK TOOTH system with the
tungsten carbide inserts facing opposite the
rotation direction will not deliver satisfactory
material removal rates and result in premature
component wear requiring early replacement.

Diamond Segment Block

Diamond segments are retained into a steel block
assembly and deliver up to 5 times greater productivity
rates than the silicon carbide stones. FIGURE 7. The
design resists clogging while delivering a conservative
service life up to 15 times longer than the stones.
Diamond is the ideal choice for larger concrete removal
projects and the removal of epoxies, paints and many
thin film coatings.

The concept is especially useful for removing a thin
layer of concrete in final preparation for a new coating
application. Can be used in both wet and dry job
applications. Worn inserts are easily replaced in a
matter of seconds. Service life is dependent upon
many variables, but can approach 35,000 square feet
per set, making it a cost efficient solution for many job
applications.

Application: SG87SH SURFACE SHARK

Tools required:

1 each, small hammer.

Parts required:

3 each, Part# WEDGE Mounting Wedge.

WHEN INSTALLING A MULTI-ACCESSORY
ATTACHMENT ON THE FLOOR GRINDER ALWAYS
WEAR THE APPROPRIATE SAFETY EYEWEAR
AND APPAREL TO MINIMIZE THE POTENTIAL
FOR INJURY FROM FLYING DEBRIS. FLYING
DEBRIS CAN RESULT IN PROPERTY DAMAGE
AND/OR PERSONAL INJURY.

1) Disconnect the Floor Grinder from the extension
cord or from the power source

2) Tilt the Floor Grinder back until the operator handle
comes in contact with the surface. The Floor Grinder
may not be in a stable position in this configuration.
To minimize the possibility of property damage and/or
personal injury, properly secure an appropriate weight
to the handle for added stability. Other means can also
be utilized to support the frame and provide proper
machine stability. Appropriate wheel chocks are also
recommended. FIGURE 8.

EXERCISE EXTREME CAUTION WHEN WORKING
NEAR OR UNDER THE FLOOR GRINDER WITH
THE OPERATOR HANDLE TILTED BACK IN THE
SERVICE POSITION. IF THE FLOOR GRINDER IS
NOT POSITIONED IN A STABLE CONFIGURATION,

FIGURE 7

WITH ADEQUATE COUNTERWEIGHT PROPERLY
SECURED, UNEXPECTED MOVEMENT CAN
ALLOW THE FLOOR GRINDER TO FALL BACK
TO THE WORK SURFACE. THE RESULT CAN
BE PROPERTY DAMAGE AND/OR PERSONAL
INJURY.

PAGE 16 SG87SH SURFACE SHARK FLOOR GRINDER