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

FIGURE 8

3) Mount the multi-accessory attachment into the slots
provided in the multi-accessory disc. If the attachment
is directional in design, determine that its mounting
position in the disc allows for proper operation.

4) Force Part# WEDGE Mounting Wedge into the area
between the multi-accessory attachment and the inside
rib of the aluminum disc by hand. The straight side of
the mounting wedge contacts the multi-accessory
attachment. The angled side of the mounting wedge
contacts the rib of the disc. FIGURE 9. An improper

mounting configuration is depicted in FIGURE 10.

FIGURE 10

DO NOT OPERATE THE FLOOR GRINDER WITH
THE PART# WEDGE MOUNTING WEDGES IN
AN IMPROPER MOUNTING CONFIGURATION.
MOUNTING A WEDGE BETWEEN THE MULTI­ACCESSORY ATTACHMENT AND THE OUTSIDE
RIB OF THE ALUMINUM DISC CAN ALLOW THE
WEDGE TO COME IN DIRECT CONTACT WITH A
VERTICAL WALL AND/OR FLOOR OBSTRUCTION.
SUCH OCCURRENCE CAN RESULT IN LOSS OF
MACHINE CONTROL, PROPERTY DAMAGE AND/
OR PERSONAL INJURY.

BEFORE OPERATING THE FLOOR GRINDER
WITH ANY MULTI-ACCESSORY ATTACHMENT,
DETERMINE THAT NO PORTION OF THE
ATTACHMENT AND/OR MOUNTING WEDGE
EXTENDS BEYOND THE NORMAL PERIMETER OF
THE ALUMINUM DISC.

5) Using the hammer, strike the wider side of the
mounting wedge with controlled, direct blows to firmly
seat the multi-accessory attachment into the aluminum
disc. Usually one or two direct blows will be sufficient
to properly retain the attachment.

Do not apply excessive impact force to the mounting
wedge to cause splitting. Once the multi-accessory
attachment is seated in the aluminum disc, further

FIGURE 9

impact force on the wedge will not increase the
seating force.

SG87SH SURFACE SHARK FLOOR GRINDER PAGE 17

Improper seating force created by an excessive
blow to the mounting wedge will not allow the
attachment to properly release from the aluminum
disc if direct contact with a foreign object is made.
Such occurrence can result in property damage
and/or personal injury. The correct seating force
for a specific job application is that which is
sufficient to retain the attachment, yet still allows
it to release from the aluminum disc when direct
contact with a foreign object is made.

6) Determine that the multi-accessory attachment is
in full contact with the aluminum disc. If not in proper
contact, refer to REMOVING A MULTI-ACCESSORY

ATTACHMENT (not including the multi-segmented,
dry diamond disc) FROM THE ALUMINUM DISC for

proper removal procedures.

7) Return the Floor Grinder to its normal operating
position.

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. Follow
the instructions for this procedure as outlined in

INSTALLING A MULTI-ACCESSORY ATTACHMENT
(not including multi-segmented, dry diamond
blades) IN THE ALUMINUM DISC.

3) The multi-accessory attachment can be removed by
both the use of a drift punch or small, pry bar. If utilizing
the drift punch, strike the narrow end of the mounting
wedge with controlled, direct blows until the attachment
is released from the aluminum disc. If utilizing the pry
bar, position the bar between the aluminum disc and
the attachment. Use controlled, direct blows to the
bar in order to force the attachment loose from the
aluminum disc. FIGURE 11.

8) Determine that the ON/OFF switch located on the
operator handle is in the OFF position. If the Floor
Grinder is to be used immediately, reconnect the
extension cord or the power source.

UNEXPECTED MACHINE START UP CAN RESULT
IN PROPERTY DAMAGE AND/OR PERSONAL
INJURY.

REMOVING A MULTI-ACCESSORY ATTACHMENT

FROM THE ALUMINUM DISC

Application: SG87SH SURFACE SHARK

Tools required:

1 each, small hammer.
1 each, drift punch or small, pry bar.

WHEN REMOVING A MULTI-ACCESSORY
ATTACHMENT FROM THE FLOOR GRINDER,
ALWAYS WEAR APPROPRIATE SAFETY EYEWEAR
AND APPAREL TO MINIMIZE THE POTENTIAL FOR
INJURY FROM FLYING DEBRIS. FLYING DEBRIS

FIGURE 11

Do not utilize excessive force when removing
a multi-accessory attachment with the pry bar.
Excessive force can result in damage to the
aluminum disc. Proper removal techniques by
both methods will result in minimal damage to the
aluminum disc.

4) Return the Floor Grinder to its normal operating
position.

5) Determine that the ON/OFF switch located on the
operator handle is in the OFF position. If the Floor
Grinder is to be used immediately, reconnect the
extension cord or the power source.

PAGE 18 SG87SH SURFACE SHARK FLOOR GRINDER

UNEXPECTED MACHINE START UP CAN RESULT
IN PROPERTY DAMAGE AND/OR PERSONAL
INJURY.

TRANSPORTING THE FLOOR GRINDER

Application: SG87SH SURFACE SHARK

The Floor Grinder has an operational weight that
prohibits one person from loading and/or unloading it
alone by conventional, physical efforts.

DO NOT ATTEMPT TO LIFT THE FLOOR GRINDER
UP INTO A TRANSPORTATION VEHICLE WITH
THE USE OF ONE PERSON ALONE. DO NOT
ATTEMPT TO LOWER THE FLOOR GRINDER FROM
A TRANSPORTATION VEHICLE WITH THE USE
OF ONE PERSON ALONE. LIFT AND/OR LOWER
THE FLOOR GRINDER ONLY BY THE USE OF A
POWER TAILGATE UNIT, A SUITABLE HOIST UNIT
OF PROPER CAPACITY AND/OR CONFIGURATION
OR BY THE USE OF A PROPER QUANTITY OF
PERSONNEL IN PROPER PHYSICAL CONDITION.

UNDERSTOOD BY ALL APPLICABLE PERSONNEL.
FAILURE TO PROPERLY UTILIZE THE MECHANICAL
DEVICE CAN RESULT IN PROPERTY DAMAGE
AND/OR PERSONAL INJURY.

2) To minimize the possibility of damage to the Floor
Grinder, always transport in its normal, upright position.
All equipment must be secured in/on vehicles with
suitable strapping or tie-downs. Personnel should not
be transported in the same compartment as equipment
and fuel supplies.

ADJUSTING THE OPERATOR HANDLE HEIGHT

Application: SG87SH SURFACE SHARK

The SG87SH S Floor Grinder incorporates a telescoping
type handle that can be adjusted to compensate for
variances in operator heights. Handle height can be
infinitely varied between the stop limits. No external
tools are required. Correct handle height can increase
overall machine productivity and reduce operator
fatigue.

1) Loosen the handle knobs located at the rear of the
handle. Extend the knobs out approximately 1/2 inch
(13 mm). FIGURE 12.

1) A lifting bail device can be used to facilitate lifting by
a mechanical device incorporating a chain and suitable
attachment device. The location of the lifting bail may
not always locate the exact position of the center of
gravity for the Floor Grinder. Lifting handles are also
provided on both sides of the transmission case.
These handles can be utilized by personnel whenever
lifting/lowering the Floor Grinder or as attachment
points for a chain sling whenever a suitable hoisting
device is utilized. The SG87SH Floor Grinder can also
be lifted or lowered by the use of a fork lift time being
inserted between the handles and transmission case.

EXERCISE EXTREME CAUTION WHEN UTILIZING
A MECHANICAL DEVICE FOR LIFTING THE FLOOR
GRINDER. UTILIZE THE MECHANICAL DEVICE
IN ACCORDANCE TO BOTH ITS STATED STATIC
AND DYNAMIC LOADING ENVELOPES. DO NOT
UTILIZE THE MECHANICAL DEVICE UNTIL THIS
INFORMATION IS PROPERLY KNOWN AND

FIGURE 12

2) Position the operator handle grips at a height
convenient to the specific operator. In most
configurations, the operator handle grips will be at
approximately waist level.

3) Tighten the handle knobs finger tight. Determine the
adjustable section of the operator handle is properly
secured tight against the fixed section.

SG87SH SURFACE SHARK FLOOR GRINDER PAGE 19

Improper knob tension and/or improperly securing
the operator handle to the main frame can result
in an unstable platform configuration. An unstable
platform configuration can result in property
damage and/or personal injury.

DETERMINE THE THREADED STUDS ARE
PROPERLY SEATED AGAINST THE SLIDING
SECTION OF THE OPERATOR HANDLE. THE
ADJUSTABLE SECTION MUST BE FIRMLY
SECURED TIGHT AGAINST THE FIXED SECTION
OF THE OPERATOR HANDLE. IMPROPERLY
SECURED STUDS CAN RESULT IN INADVERTENT
OPERATOR HANDLE MOVEMENT AND/OR
SEPARATION, RESULTING IN PROPERTY DAMAGE
AND/OR PERSONAL INJURY.

UNEXPECTED MACHINE START UP CAN RESULT
IN PROPERTY DAMAGE AND/OR PERSONAL
INJURY.

4) The SG87SH Floor Grinder is designed to operate
from a clean, 15 ampere, 115 VAC, 60 Hz, nominal
power source. A clean power source refers to the
amperage available from the individual electrical circuit
selected. Additional electrical products already utilizing
the same circuit will reduce the available amperage
and can result in starting and operational difficulties.

Operating the Floor Grinder from a power source
of improper voltage and/or amperage will result
in unrepairable damage to the electric motor and
related controls.

STARTING THE FLOOR GRINDER ON THE JOB

SITE

1) Position the Floor Grinder on a flat and level surface
of firm foundation.

2) Install the Multi-Accessory Attachment required
for the specific job application per the procedures as
outlined in this manual.

3) Determine that the ON/OFF master switch located
on the operator handle is in the OFF position. FIGURE

13.

5) Providing proper voltage and amperage levels to
the electric motor is essential to obtain maximum
productivity and service life. Low voltage and amperage
levels will cause the motor to overheat. The motor is
equipped with an automatic thermal protection device
that will stop it before major internal damage can result.
After the motor has cooled to an acceptable temperature
level, the switch must be manually activated to restart.
FIGURE 14.

FIGURE 14.

FIGURE 13

PAGE 20 SG87SH SURFACE SHARK FLOOR GRINDER

6) The Floor Grinder utilizes a factory supplied extension
cord equipped with an integral GFI device. The GFI
device is intended to protect both the operator and
electric motor in the event a ground fault is developed
during operation. The extension cord is 37 foot (11 m)
long, fabricated from 12 AWG wire and incorporates
a NEMA 5-15P plug and a NEMA L5-15R twist lock
receptacle. The twist lock feature allows the extension
cord to be pulled by the Floor Grinder without becoming
disconnected.

BEFORE USE, PROPERLY INSPECT THE
EXTENSION CORD AND WIRING DEVICES FOR
STRUCTURAL INTEGRITY. DO NOT UTILIZE A
CORD WITH A WORN OR CUT OUTER JACKET
MATERIAL. DO NOT UTILIZE A CORD THAT HAS
BEEN REPAIRED WITH ELECTRICAL TAPE. DO
NOT UTILIZE A CORD WITH A CRACKED AND/
OR DAMAGED GFI CASE. USE OF AN EXTENSION
CORD OF IMPROPER STRUCTURAL INTEGRITY
AND/OR DAMAGED GFI CAN RESULT IN PROPERTY
DAMAGE AND/OR PERSONAL INJURY.

the length of a defective extension cord to be indicated.
Extension cord gauge size and length must conform to
National Electric Code standards.

FOR MAXIMUM PROTECTION AGAINST A FAULT,
ALWAYS CONFIGURE A GROUND FAULT CIRCUIT
INTERRUPTER TO BE PLUGGED INTO THE POWER
SOURCE RECEPTACLE. A CONFIGURATION WITH
THE GROUND FAULT CIRCUIT INTERRUPTER
PLACED BETWEEN THE FLOOR GRINDER AND
THE POWER SOURCE RECEPTACLE WILL NOT
AFFORD MAXIMUM PROTECTION AGAINST A
POTENTIAL FAULT.

9) Couple the NEMA L5-15R receptacle of the factory
supplied extension cord and the NEMA L5-15P plug
located on the Floor Grinder together. Twist to lock.
FIGURE 15. Connect the GFI to the power source
receptacle. Determine that the reset switch is in its
proper position to activate the GFI.

ALL ELECTRICAL WIRING, INCLUDING EXTENSION
CORD GAUGE WIRE SIZE AND/OR LENGTH,
MUST BE INSTALLED AND/OR APPROVED IN
ACCORDANCE TO LOCAL ELECTRICAL CODES
AND PRACTICES.AN IMPROPER WIRING
INSTALLATION CAN RESULT IN PROPERTY
DAMAGE AND/OR PERSONAL INJURY.

7) Determine that the power source receptacle to be
utilized is properly grounded. This can be accomplished
with proper testing equipment and procedures. If there
are any questions regarding the suitability of a specific
power receptacle, contact your dealer or our Customer
Service Department for assistance BEFORE utilizing
the Floor Grinder. There is no charge for this service.

8) If additional extension cord length is required for
a specific job application, an additional extension
cord can be utilized in conjunction with an external
GFI. Plug the receptacle of the additional extension
cord into the factory supplied GFI. Plug the ground
fault circuit interrupter into a separate power source
receptacle. Connect the extension cord plug into the
external GFI. This configuration will allow any fault over

FIGURE 15

10) Place the ON/OFF master switch located on the
operator handle to the ON position. FIGURE 16.

SG87SH SURFACE SHARK FLOOR GRINDER PAGE 21

FIGURE 16

11) Grasp the operator handle with firm grip;ping.
When starting the electric motor, apply a down force
directly to the operator handle to help reduce the
amount of machine weight against the work surface.
Rotate the starter control grip with the right hand to
start the electric motor. Reduce the amount of applied
down force on the operator handle as the electric
motor attains its operational speed. The electric motor
will require additional time to help compensate for the
additional starting amperage required.

AS SOON AS THE ELECTRIC MOTOR HAS STARTED,
THE OPERATOR MUST BE IN A POSITION TO
ASSUME DIRECT AND FULL CONTROL OF THE
FLOOR GRINDER. FAILURE TO ASSUME DIRECT
AND FULL CONTROL CAN RESULT IN PROPERTY
DAMAGE AND/OR PERSONAL INJURY.

12) The Floor Grinder is stopped by rotating or
releasing the starter control grip with the right hand to
the OFF position. When not in use, turn the ON/OFF
master switch to the OFF position.

OPERATING THE FLOOR GRINDER ON THE JOB

SITE

Application: SG87SH SURFACE SHARK

VICINITY OF THE FLOOR GRINDER MUST WEAR
APPROPRIATE SAFETY EYE WEAR AND HEARING
PROTECTION DEVICES. OTHER SAFETY APPAREL
AND/OR PROCEDURES, DEEMED NECESSARY
BY SUPERVISORY PERSONNEL MUST ALSO BE
WORN AND/OR PRACTICED BY ALL APPROPRIATE
PERSONNEL.

EXERCISE EXTREME CAUTION WHEN OPERATING
THE FLOOR GRINDER IN THE VICINITY OF DECK
INSERTS, PIPES, COLUMNS, OPENINGS, LARGE
CRACKS, UTILITY OUTLETS OR ANY OBJECT
PROTRUDING FROM THE SURFACE. CONTACT
WITH SUCH OBJECTS CAN LEAD TO LOSS OF
MACHINE CONTROL, RESULTING IN PROPERTY
DAMAGE AND/OR PERSONAL INJURY.

1) The Floor Grinder incorporates a single rotating
disc for mounting a wide variety of multi-accessory
attachments.

2) The single disc of the SG87SH Floor Grinder rotates
in a clockwise direction as viewed by the operator. This
action produces a torque effect that, during operation,
is counteracted by both the wheels and operator.
Reaction to the torque effect will attempt to move the
Floor Grinder in a counterclockwise direction. Proper
operator position can reduce the amount of torque
effect experienced by the operator. Assume a position
that allow exercising reactive “body english” against
the torque effect created by the specific process. Keep
upper arms as close to the upper body as possible to
maximize mechanical leverage. An operator should
position his back as vertical as possible by bending the
legs as required. Positioning the left foot ahead of the
right foot at a comfortable distance will enhance proper
body position. Maintaining proper operating position
is one of the most IMPORTANT and EFFECTIVE
procedures for controlling the torque effect. Improper
operating positions only aggravate the effects of the
torque effect upon the operator. FIGURE 17 depicts
a proper operator position. FIGURE 18 depicts an
improper operator position.

THE GRINDING PROCESS PRODUCES EXCESSIVE
NOISE, VIBRATION AND FLYING DEBRIS. ALL
OPERATORS AND WORK PERSONNEL IN THE

PAGE 22 SG87SH SURFACE SHARK FLOOR GRINDER

FIGURE 17

Grinder until such damage has been repaired and/
or replaced. Damage to property and/or personal
injury can result.

4) A multi-accessory attachment that comes in direct
contact with a protruding obstruction from the floor
can result in unexpected, rapid and jerky directional
movement of the machine. In most operating situations,
direct contact with a protruding obstruction from the
floor will result in the multi-accessory attachment
becoming dislodged from the aluminum disc. This
occurrence is intended to protect the Floor Grinder
from excessive damage and allow the operator to
remain in proper control of the machine.

ALWAYS MAINTAIN PROPER CONTROL OF THE
FLOOR GRINDER. IF AN OPERATOR LOOSES
CONTROL OF THE MACHINE, A “RUNAWAY”
FLOOR GRINDER CAN RESULT IN PROPERTY
DAMAGE AND/OR PERSONAL INJURY.
THE ELECTRIC MOTOR IS INTENDED TO
AUTOMATICALLY STOP IF THE OPERATOR FAILS
TO MAINTAIN PROPER CONTROL AND RELEASES
THE STARTER CONTROL GRIP.

FIGURE 18

Maintain the operator handle and motor control
handle grip areas in good condition and free of
moisture, pitch, oil or grease. Wear gloves to
improve your grip. Bent and damaged handles, a
motor control with damaged or no grip aggravate
the torque effect upon the operator by limiting
control and comfort. Do not operate the Floor

WHEN OPERATING THE FLOOR GRINDER ON
ABOVE GROUND FLOOR LEVELS, EXERCISE
EXTREME CAUTION TO PREVENT LOSS OF
CONTROL THAT COULD ALLOW THE MACHINE
AND/OR OPERATOR TO FALL DOWN TO LOWER
LEVELS. SUCH AN OCCURRENCE CAN RESULT
IN PROPERTY DAMAGE AND/OR PERSONAL
INJURY.

5) Productivity rates with the various multi-accessory
attachments can be increased with the addition of
external weight being applied to the area over the
aluminum disc. The maximum allowable external
weight for the SG87SH is 150 lbs (68 kg). Exceeding
this figure can result in permanent structural damage to
the Floor Grinder. Provisions for securing the weight by
the means of strapping or other, appropriate methods
is provided. FIGURE 19.

SG87SH SURFACE SHARK FLOOR GRINDER PAGE 23

b) Higher material removal rates can sometimes be
achieved by making a series of shallow passes 90
degrees to each other to form a waffle like pattern. This
technique is especially useful when removing thicker
accumulations of rubber, paint, dirt debris, etc. from
industrial floors.

7) The grinding process on many work surface materials
can produce sparks, dust and other foreign particle
contamination.

FIGURE 19

DO NOT OPERATE THE FLOOR GRINDER
WITHOUT ALL EXTERNAL WEIGHT PROPERLY
SECURED TO THE MAIN FRAME. A SUDDEN
CHANGE IN MOVEMENT OR DIRECTION CAN
ALLOW THE UNSECURED WEIGHT TO FALL
OFF THE FLOOR GRINDER, RESULTING IN LOSS
OFMACHINE CONTROL, PROPERTY DAMAGE
AND/ OR PERSONAL INJURY. THIS PROCEDURE
IS ESPECIALLY IMPORTANT WHEN OPERATING
THE FLOOR GRINDER ON FLOORS AND/OR
SURFACES ABOVE GROUND LEVEL.

6) The wide variety of potential work surface
materials along with the corresponding variety of job
site environments, makes it impossible to develop a
standardized operating procedure for the Floor Grinder.
Use of the Floor Grinder will require constant trial and
error testing until satisfactory results are achieved.
Experience gained over time and common sense will
help minimize the amount of necessary testing. Many
factors will directly affect the operating parameters and/
or techniques utilized for a specialized job application.
Some of these factors include:

a) Work surface material yield and tensile values. As
a general rule, these values will determine material
removal rates per unit of time. Materials with high
yield and tensile values will characteristically resist/
limit material penetration. For such materials, the
accepted procedure is to make a number of multiple
passes over the work surface rather than attempt
to make a single, deep pass. The net effect is to
actually increase productivity: more material removed
in less time. Other added benefits to this technique
are decreased vibration, less operator fatigue and
increased component service life.

SPARKS PRODUCED BY THE ACTIONS OF MULTI­ACCESSORY OPTIONS AGAINST THE WORK
SURFACE (FOR EXAMPLE: STRIKING ANCHOR
BOLTS) MAY COME IN CONTACT WITH MATERIALS
THAT CAN RESULT IN A FIRE AND/OR EXPLOSION.
THIS OCCURRENCE CAN RESULT IN PROPERTY
DAMAGE AND/OR PERSONAL INJURY.

THE CREATION OF DUST AND OTHER FOREIGN
PARTICLE CONTAMINATION FROM THE
OPERATIONAL PROCESS CAN RESULT IN
PROPERTY DAMAGE AND/OR PERSONAL INJURY.
FOR SUCH OPERATING CONDITIONS, ALWAYS
WEAR A NIOSH/MSHA APPROVED DUST/MIST
RESPIRATOR. CONSULT APPLICABLE OSHA
REGULATIONS FOR SPECIFIC INFORMATION.

8) Dust and other particle contamination can be
controlled by the following methods:

a) The Floor Grinder is equipped with a 3 inch (76 mm)
outside diameter vacuum tube adapter located at the
rear of the machine. An industrial type vacuum system
and front shield assembly can be attached to the
Floor Grinder to remove/control dust and other particle
contamination from the work surface. A hose clamp
is sometimes required to properly secure the vacuum
hose to the vacuum tube. FIGURE 20.

PAGE 24 SG87SH SURFACE SHARK FLOOR GRINDER

FIGURE 20

9) Normal usage of the Floor Grinder will allow the
build-up and accumulation of work surface materials
on interior surfaces. It is highly recommended that both
the interior and exterior surfaces be properly cleaned
after the completion of each usage.

Failure to properly clean the interior surfaces of
the Floor Grinder can result in dried material build­up and accumulation directly affecting bearing
service life.

EXERCISE EXTREME CAUTION WHEN UTILIZING
ANY SOLVENT TO REMOVE ACCUMULATED
MATERIALS FROM THE SURFACES OF THE
MACHINE AND RELATED COMPONENTS. MANY
SOLVENTS ARE FLAMMABLE. DO NOT SMOKE
OR INTRODUCE FLAME IN THE WORK AREA.
PROVIDE ADEQUATE VENTILATION AND WEAR
PROPER SAFETY APPAREL.

ALWAYS UTILIZE A VACUUM SYSTEM DESIGNED
TO OPERATE WITHIN THE SPECIFIC JOB SITE
REQUIREMENT. DUST MATERIAL CAN MEET
CLASS II OR CLASS III SPECIFICATIONS OF THE
NATIONAL ELECTRIC CODE® FOR HAZARDOUS
LOCATION CLASSIFICATIONS. CONSIDERATION
MUST ALSO BE GIVEN TO THE CREATION OF
HAZARDOUS TYPE MATERIALS REQUIRING
SPECIFIC DISPOSAL PROCEDURES. DETERMINE
THAT THE VACUUM SYSTEM IS PROPERLY
DESIGNED TO OPERATE WITHIN THESE
ATMOSPHERES. CONSULT CURRENT NATIONAL
ELECTRIC CODE®, OSHA AND ENVIRONMENTAL
PROTECTION AGENCY REGULATIONS FOR
SPECIFIC INFORMATION.

b) Water/sand slurry mixture applied directly to the
work surface can be an effective method of reducing
the effects of grinding and other material removal
processes. This method can be a productive alternative
when removing adhesives containing asbestos. A
negative effect of this method is that the water/sand
slurry mixture can be classified as a hazardous
material, requiring proper disposal procedures.

PROPERLY DISPOSE OF ALL ACCUMULATED
MATERIALS PER OSHA AND ENVIRONMENTAL
PROTECTION AGENCY CODES AND
REGULATIONS. MANY ACCUMULATED
MATERIALS CAN BE CLASSIFIED AS HAZARDOUS
AND REQUIRE PROPER DISPOSAL PROCEDURES.
CONTACT THE APPLICABLE GOVERNMENT
AND/OR PRIVATE AGENCIES FOR SPECIFIC
INFORMATION.

10) On job applications where the work process
creates a considerable amount of loose material, it
can become almost impossible to determine proper
material removal depths and the extent of work already
accomplished. The problem can be compounded if a
vacuum system is not utilized. Loose material should be
removed by sweeping or other, appropriate processes
and the Floor Grinder utilized until conditions again
warrant removing the accumulated material.

SG87SH SURFACE SHARK FLOOR GRINDER PAGE 25

STOPPING THE SURFACE GRINDER

Definitions of Floor Flatness and Levelness.

Application: SG87SH SURFACE SHARK

The SG87SH Floor Grinder is stopped by rotating or
releasing the starter control grip with the right hand to
the OFF position. When not in use, turn the ON/OFF
master switch to the OFF position.

OPERATIONAL PARAMETERS AND TECHNIQUES

FOR THE FLOOR GRINDER

Application: SG87SH SURFACE SHARK

Early Age Grinding

Early age grinding is an alternative to floating and
troweling. It gets it name from the fact that the concrete
is ground at an early age, after it has set but before
it has gained much structural strength. The process
usually involves the following steps:

1) Normal screeding of the floor.

2) Smoothing the floor surface with a skip float.

3) Cover the floor with polyethane sheeting.

4) Removing the sheeting and grinding the floor down
a uniform depth of approximately 1/32 inch within 24 to
48 hours of the initial pouring. The C10 silicon carbide
grinding stones are usually used for the process,
although the multi segmented, dry diamond blades
can be use as an alternative with substantially greater
productivity rates. The main benefit of early age
grinding is that it eliminates late work in cold weather.
With ordinary finishing methods, a slab cast in the
morning of a cold weather day might not get finished
troweled until very late at night. With grinding, the
construction crew is able to leave the job at the end
of a normal work day and return 1 or 2 days later to
finish the job. Early age grinding may not reduce the
total number of work hours, but it usually eliminates the
need for work at overtime rates, which can substantially
increase total project costs.

One side benefit of early age grinding is that the
process demands less skill than conventional floating
and troweling. This makes it an attractive process
where skilled crew personnel may not be available.
It is also an excellent procedure for concrete floors
that will be eventually covered by carpet or an applied
coating.

The terms flatness and levelness have poorly
understood meanings in everyday speech, but have
important distinctions in floor construction.

Flatness is defined as planarity or lack of curvature. A
more simple definition is that a flat floor is smooth and
free of bumps and dips. An unflat floor is bumpy and
wavy. Levelness is defined as horizontality or lack of
slope. A level floor is horizontal. A floor that is unlevel
is sloped or tilted.

A floor can be flat, but still not level. Some floors
are specifically designed to be unlevel; they can be
intentionally sloped for drainage considerations. Very
few, if any, floors are specifically designed to be
unflat. Unfortunately, many turn out that way. Flatness
and levelness are both desirable, but have different
implications for the floor user. Flatness is critical where
the user’s main concern is the behavior of wheeled
type vehicles. Levelness is critical where the user’s
main concern is with fixed structures such as shelving,
racks and the placement of machine tools.

Exceptions exist, but for most users, flatness is more
important than levelness. The reasoning is that fixed
equipment can be shimmed or adjusted to compensate.
However, it is not as easy to adapt a wheeled vehicle
to a floor that is not flat enough to allow for proper
action.

Flatness and levelness also have different implications
for the floor contractor. Flatness is determined mainly
by finishing methods. Levelness is determined mainly
by the side forms.

Defined Versus Random Traffic Patterns.

Floors are subject to two kinds of traffic patterns:
defined and random. On a defined traffic floor, vehicle
movement is confined to fixed paths. On a random
traffic floor, vehicles are free to roam, though inevitably,
some traffic patterns are used more than others.

The distinction is important because the two kinds of
traffic demand different methods of measuring surface
regularity. On a defined traffic floor, a continuous (or
nearly continuous) profile in each of the paths can be
measured. But where traffic is random, the possible
travel paths are infinite in number. What usually results
is statistical sampling; selected points or lines are
checked and assumed that they represent the whole
floor surface.

PAGE 26 SG87SH SURFACE SHARK FLOOR GRINDER

The highest degree of surface regularity is found
among the defined traffic floors. Defined traffic floors
allow the designer and contractor to focus on a limited
number of critical areas. When a defined traffic floor
is out of tolerance, it is relatively easy to identify the
defects for correction---usually by employing a grinding
process.

How to Define Surface Regularity.

Since the middle 1980s, new methods of defining
surface regularity have been adopted as national
standards. Older methods will continue to be utilized,
although they are less effective. The following methods
will be discussed:

1) The F number system for random traffic floors

2) The TR34 system for defined traffic floors

Both methods are not of equal value. For random
traffic floors, F numbers provide the most complete and
consistent system. For defined traffic floors, the TR34
system is superior.

The F number system utilizes a pair of numbers to
define surface regularity. The flatness number, OFF,
is based upon the curvature over a horizontal distance
of 24 inches. The levelness number, Fl, is based upon
the floor slope over a horizontal distance of 10 feet.
The standard test for F numbers is specified in ASTM
E1155 and/or most recent version.With both OFF and
Fl, higher numbers mean greater surface regularity.
Though the scale ranges from zero to infinity, almost
all floors have F numbers between 10 and 100 for both
flatness and levelness. Since the scale is linear, an
OFF50 floor is exactly twice as flat as an OFF25 floor.

as to bring the overall F numbers up to the specified
values. If a slab fails to meet even the specified local
numbers, it must be repaired or replaced, but such
failures seldom occur if all parties understand what is
expected from the start.

Designers are not obligated to use this two tier format.
Some designers specify a single F number pair (OFF
and Fl) which applies to each individual slab. But this
also raises the risk that slabs will be rejected.

FIGURE 21 depicts the overall and minimum F numbers
for various floor classes. The floor classification is
from the American Concrete Institute. Although the F
number system is only a few years old, it offers these
advantages:

a) The system controls both flatness and levelness.

b) There is a standard test method.

c) The system recognizes the statistical nature of
profile testing on random traffic floors.

d) The system is infinitely variable.

Most F number specifications are written in a two
tier format. The overall F numbers apply to the floor
taken as a whole. The local F numbers apply to each
individual slab and are usually only one half to two
thirds the overall values.

The overall F numbers are not just simple averages.
ASTM E1155 covers how to combine F numbers.

The two tier format encourages contractors to achieve
good surface regularity while allowing for minor defects.
The attempt is to pour the entire floor to the specified
overall F numbers. If, for instance, the construction crew
has a bad day and fails to meet the specified overall
numbers for the slab, the slab can still be accepted
provided it meets the specified local numbers. Such
an occurrence serves as a warning to the crew that it
must strive for a better performance on later slabs, so

FIGURE 21

One of the major limitations of the F number system is
that it does not control the surface regularity at joints.
Because joints are statistical anomalies, the standard
test method forbids measurements within 24 inches.
The designer specifying by F number has two methods
to accommodate the problem. The first solution is
to locate joints at locations where surface regularity
is not important. The second solution is to design
specifications for the joints themselves.

SG87SH SURFACE SHARK FLOOR GRINDER PAGE 27

The TR 34 Tolerances for Defined Traffic Floors.

The TR 34 System divides defined traffic floors into
three categories:

a) Superflat

b) Category 1

c) Category 2

For each category, the TR 34 System specifies limits
for three properties:

Property 1 is the difference in elevation between two
points 12 inches apart, measured in the direction of
vehicle traffic. This is the levelness tolerance.

Property 2 is the difference in slope over 24 inches
measured in the direction of vehicle traffic. This is
the flatness tolerance. It is identical as the 24 inch
curvature utilized in the F number system.

Property 3 is the difference in elevation between
opposite points in the left and right wheel path,
measured perpendicular to the direction of vehicle
traffic. As with Property 1, it is a levelness tolerance.

Improving the Wear Resistance of Concrete Floors
by Grinding with the Floor Grinder.

Poor wear resistance can often be traced back to a
surface that is weaker than underlying levels of the
pour. This occurrence can result from bad finishing
techniques, improper curing or early freezing.

Where surface weakness is a problem, grinding can
be a solution. The process is similar to the early age
technique. The grinding depth is typically 1/16 to 1/8
inch. A large project should not be attempted until
a small test area has proven that the technique will
produce the desired results. Usually only a square
yard of floor is ground with the normal wear tests
performed.

Repair costs can be minimized by grinding only those
floor areas that accommodate traffic. For example, in
a pallet rack warehouse, it may be necessary to grind
only the aisle areas and not under any of the racks.
The grinding process can adversely affect the surface
regularity. Where specific properties are important,
it may be necessary to survey the floor during the
grinding process to ensure that flatness and levelness
specifications are maintained.

The TR 34 System specifies different values for
Property 3 depending upon whether the distance
between left and right wheel paths is more or less than
5 nominal feet.

The Superflat category is intended for very narrow
aisle warehouses where the highest standards are
required. Category 1 is suggested for very narrow aisle
warehouses where the vertical lift height is between
26 and 43 feet. Category 2 is for very narrow aisle
warehouses where the vertical lift height is under 26
feet and the use of low rise, automatically controlled
vehicles. No matter which category of surface regularity
is specified, it is accomplished by measuring elevations
on 12 inch centers. This is very similar to an F number
survey, but with an important distinction. In an F
number survey, the elevation profiles are made on the
floor at random. With the TR 34 System, the survey
measurements are made on the actual paths of the
vehicles that will utilize the floor.

Cleaning Concrete Floors to Improve the Wear
Resistance with Floor Grinder.

Clean concrete floors have a longer service life than
dirty, poorly maintained floors. Loose debris produces
three-bodied wear by allowing particles to roll between
the traffic and the floor surface. With some types of
debris, especially when lodged in vehicle wheels, wear
can be immediate and severe.

The Floor Grinder can be utilized with a number
of multi accessories to clean and extend concrete
floor service life. The SHARK TOOTH floor coatings
removal system readily removes food, oil and rubber
accumulations from high traffic floor areas.

PAGE 28 SG87SH SURFACE SHARK FLOOR GRINDER

SERVICE

PREVENTATIVE MAINTENANCE CHECK LIST

BEFORE RECONNECTING THE EXTENSION
CORD. IMPROPER PROCEDURES CAN RESULT
IN PROPERTY DAMAGE AND/OR PERSONAL
INJURY.

Application: SG87SH SURFACE SHARK

The normal operation of the Floor Grinder produces
extreme dirt and dust, along with levels of random
vibration. Before operating the Floor Grinder, the
following service list should be accomplished. This
list is for reference only and is not intended to be all
inclusive. Other subject areas can be added at the
discretion of the owner(s) and/or operator(s)

1) Disconnect the Floor Grinder from the extension
cord or power source BEFORE performing any service
related work.

2) Check all fasteners for proper torque values. If a
fastener requires retorquing, consult a torque chart for
proper value. Properly discard and replace any worn
fastener with a factory approved, replacement part
only.

3) Check the V-belt for wear. Adjust or replace
as necessary. Check pulleys for wear and proper
alignment. Many loose materials created as a result of
operating processes can be extremely abrasive.

CHECKING V-BELT TENSION AND ALIGNMENT

Application: SG87SH SURFACE SHARK

Proper V-belt tension and alignment are essential for
smooth transmission of horsepower and extended
service life. Improper tension and alignment will
accelerate V-belt wear and contribute to decreased
productivity. The V-belt is tensioned at the factory
with the maximum recommended force. Check the
belt tension at least two times during the first day of
operation as there will normally be a decrease in belt
tension until it has been run in. Check the belt tension
every eight hours of operation thereafter and maintain
tension within the recommended range. The correct
operating tension for a V-belt drive is the lowest tension
at which it will not slip under peak load conditions.

Tools Required:

1 each, 16 inch minimum length straightedge
1 each, 10 lbs minimum capacity, tension scale or
belt tension tool.

4) Keep the Floor Grinder clean. Wash the unit after
each use. Keep loose materials from accumulating
around motor cooling fan and intake area. Determine
that the interior sections of the frame are free of
material build-ups. Such build-ups can restrict the
operating process and present a potential safety
hazard. Clean and remove any material build-up from
the Floor Grinder after each use.

5) Remove material accumulations from the exterior
surfaces of the electric motor. The electric motor is a
totally enclosed, fan cooled (TEFC) design. Keep the
fan fins clear of material accumulations to enhance air
flow over the motor exterior for cooling purposes.

DO NOT PERFORM PREVENTATIVE MAINTENANCE
CHECKS WITH THE ELECTRIC MOTOR RUNNING.
STOP THE MOTOR AND DISCONNECT THE
EXTENSION CORD BEFORE PERFORMING ANY
MAINTENANCE TO THE FLOOR GRINDER. IF
ELECTRIC MOTOR EQUIPPED, TURN THE ON/
OFF MASTER SWITCH TO THE OFF POSITION

1) Disconnect the Floor Grinder from the extension
cord or power source BEFORE performing any service
related work.

2) Position the Floor Grinder on a suitable work bench
with the V-belts approximately at waist level.

3) Remove the wing-type nuts that secure the external
weight/belt guard.

4) While gripping the cutout in the external weight,
slide the weight/belt guard away from the electric motor
approximately 1 inch. This will release the cover from
the forward catch mechanism.

5) Remove the weight/belt guard from the main frame.
Clean the inside of the belt guard with an appropriate
solvent. Store in an appropriate location.

Observe all applicable safety precautions for the
solvent.

SG87SH SURFACE SHARK FLOOR GRINDER PAGE 29

6) Check the belt tension using the spring scale or
belt tension tool midway between the two pulleys. Belt
tension should measure approximately 0.22 inch at
3-1/4 to 4-3/8 lbs measured force range. FIGURE 22.
If tension is within specifications, proceed to Step 7. If
tension is not within specifications, refer to INSTALLING
A REPLACEMENT V-BELT OR PULLEY for specific
information.

FIGURE 22

7) Belt alignment is checked with the straightedge.
Place the straightedge squarely against the
transmission pulley. Properly aligned pulleys should
also place the straightedge squarely against the motor
pulley. Remove the straightedge and rotate the motor
pulley 120 degrees. Recheck the alignment with the
straightedge. Repeat the process until the motor pulley
is rotated a full 360 degrees. Maximum allowable
misalignment is +- 1/32 inch. If pulley alignment
is not within specifications, refer to INSTALLING
A REPLACEMENT V-BELT OR PULLEY for specific
information. FIGURE 23.

8) Install the weight/belt cover to the main frame and
secure with the wing-type nuts. Determine that all safety
related decals affixed to the weight/belt guard are fully
readable. If any decal is hot fully readable, replace with
a factory approved, replacement part only.

9) If the machine is to be used immediately, determine
the master switch located on the operator handle is in
the OFF position and that the starter control grip is in
the OFF position before reconnecting the Floor Grinder
to the power source.

UNEXPECTED MACHINE START UP CAN RESULT
IN PROPERTY DAMAGE AND/OR PERSONAL
INJURY.

INSTALLING A REPLACEMENT V-BELT OR

PULLEY

Application: SG87SH SURFACE SHARK

Tools Required:

1 each, 9/16 inch wrench.
1 each, 9/16 inch socket with long extension and
ratchet.
1 each, 5/32 inch Allen wrench.
1 each, 16 inch minimum length straightedge.
1 each, 10 lbs minimum capacity, tension scale or
belt tension tool.

Parts required:

1 each, Part# MB45 V-belt.
1 each, Part# MSG87SH-0410 Pulley Assembly
(if required).
1 each, Part# MSG87SH-0400 Pulley Assembly
(if required).

1) Disconnect the Floor Grinder from the extension
cord or power source BEFORE performing any service
related work.

2) Position the Floor Grinder on a suitable work surface
with the V-belt approximately at waist level.

FIGURE 23

3) Remove the wing-type nuts that secure the external
weight/belt guard.

PAGE 30 SG87SH SURFACE SHARK FLOOR GRINDER

4) While gripping the cutout in the external weight,
slide the weight/belt guard away from the electric motor
approximately 1 inch. This will release the cover from
the forward catch mechanism.

5) Remove the weight/belt guard from the main frame.
Clean the inside of the belt guard with an appropriate
solvent. Store in an appropriate location.

Observe all applicable safety precautions for the
solvent.

6) Using the ratchet, long extension and 9/16 socket,
loosen the hexagon nuts that retain the electric motor
mounting plate to the main frame. FIGURE 24.

7) Using the 9/16 inch wrench, loosen the 3/8 inch
hexagon jam nuts from the motor mounting plate.
FIGURE 25.

8) With the ratchet and 9/16 inch socket, rotate the
mounting plate take-up screws counterclockwise to
loosen the V-belt and allow the electric motor to slide
forward toward the front of the main fame. FIGURE

25.

FIGURE 25

9) Remove the worn V-belt from the pulleys. Inspect
the electric motor and transmission pulleys for wear
and damage.

a) Do not install a replacement V-belt if any pulley has
an excessively worn groove. Such a pulley should be
replaced with a factory approved replacement part to
insure proper belt fit. Operating a replacement V-belt
in a worn pulley groove will accelerate wear, reduce
horsepower and torque levels while significantly
reducing component service life.

b) If a replacement pulley is required, remove and
reinstall with a factory approved replacement part. Refer
to CHECKING V-BELT TENSION AND ALIGNMENT
for information relative to maintaining proper V-belt
tension and pulley alignment.

c) A V-belt should never be forced over a pulley. More
belts are broken from this cause than from actual
failure in service.

d) Install the replacement V-belt, Part# MB45.

e) Keep the belt as clean and free of foreign materials
as possible. Do not use belt dressing.

10) Using the ratchet and 9/16 inch socket, rotate
the motor mount take-up screws clockwise until the
V-belt has enough tension to not allow it to fall off the
pulleys.

11) Refer to CHECKING V-BELT TENSION AND
ALIGNMENT for information relative to maintaining
proper V-belt tension and pulley alignment.

12) When correct V-belt tension and pulley alignment
is attained, tighten the hexagon nuts that retain the
motor mount to the main frame.

FIGURE 24

SG87SH SURFACE SHARK FLOOR GRINDER PAGE 31

13) Install the weight/belt cover to the main frame
and secure with the wing-type nuts. Determine that all
safety related decals affixed to the weight/belt guard
are fully readable. If any decal is hot fully readable,
replace with a factory approved, replacement part
only.

13) If the machine is to be used immediately, determine
the master switch located on the operator handle is in
the OFF position and that the starter control grip is in
the OFF position before reconnecting the Floor Grinder
to the power source.

REPLACING THE LORD® TYPE ELASTOMERIC

MOUNTS ON THE MULTI-ACCESSORY DISC

Application: SG87SH SURFACE SHARK

Lord® type elastomeric rubber mounts are utilized
to allow each multi-accessory disc to maintain full
contact with the work surface. The rubber mounts
afford a constant flex rate for the multi-accessory disc
throughout its service life. The rubber compound is
resistive to the effects of ultraviolet radiation and most
common chemicals encountered when operating the
Floor Grinder .

During the manufacturing process, the rubber mounts
are pressed into specially machined cavities in the
disc mounting plate. Under normal usage and job
applications, the Lord® type rubber mounts will deliver
appropriate performance for the expected service life
of the Floor Grinder. However, an attachment mounted
in the multi-accessory disc that directly strikes a vertical
floor obstruction with sufficient impact force can cause
one or more of the mounts to become separated from
the mounting plate. This occurrence will not allow
the multi-accessory disc to maintain full contact with
the work surface. This occurrence is also intended to
protect the V-belt and bearings from costly damage
and the operator from an impact force that could cause
personal injury.

Parts Required:

Part# MJ-6250-2 Elastomeric Mount (as required).
1 container each: Part# M80 Installation Lubricant (or
approved equivalent).

1) Disconnect the Floor Grinder from the extension
cord or power source BEFORE performing any service
related work.

2) Position the Floor Grinder on a suitable work surface
with the multi-accessory disc at a comfortable level.

3) Remove the wing-type nuts from the main frame.
While gripping the cutout in the external weight, slide
the weight/belt guard away from the electric motor
approximately 1 inch. This will release the cover from
the forward catch mechanism. Remove the weight/belt
guard from the main frame. Clean the inside of the belt
guard with an appropriate safety solvent. Check for
signs of wear and damage. Secure in a proper storage
area.

Observe all applicable safety precautions for the
solvent.

4) 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, apply an appropriate weight to the
handle to stabilize the Floor Grinder. FIGURE 26. Other
means can also be utilized to support the frame and
provide proper machine stability. Appropriate wheel
chocks are recommended. Follow the instructions for
this procedure as outlined in INSTALLING A MULTI-

ACCESSORY ATTACHMENT IN THE ALUMINUM
DISC.

Tools Required:

1 each, 5/16 Allen wrench.
2 each, 5/8 wrenches.
1 each, arbor press of sufficient capacity and stability.
1each, suitable length of 3/4 inch diameter steel rod.
1 each, suitable section of 1-1/2 inch inside diameter
steel tubing.

5) Utilizing the Allen wrench, remove the aluminum
multi-accessory disc (if still attached) from the Floor
Grinder.

6) Utilizing the 9/16 inch wrenches, remove the cap
screws that retain the Lord® rubber mounts to both the
mounting plate and transmission shaft.

PAGE 32 SG87SH SURFACE SHARK FLOOR GRINDER

FIGURE 26

7) Inspect the appropriate cavities in the mounting
plate for wear and damage. Any nick or burr must be
remove by the use of an appropriate file, followed by
the use of 240 grit sandpaper. FIGURE 27.

to thrust directly against the mount. The mounting
plate must be suspended from the arbor press to
allow the mount to clear when the pressing process is
completed. The section of 1-1/2 inch inside diameter
steel tubing can be utilized for this purpose.Center all
components on the mounting plate. Using the arbor
press, apply a steady force in a straightline direction
to the mount until it fully penetrates the cavity in the
mounting disc. Do not attempt to push the elastomeric
mount through the mounting disc with excessive force.
Damage to the elastomeric mount will result.

10) Reassemble the mounting disc to the transmission
shaft.

11) Reassemble the mounting plate to the mounting
disc.

12) Reassemble the aluminum multi-accessory disc to
the mounting plate.

13) Check to determine that the replacement
elastomeric mounts allow for proper position of the
aluminum multi-accessory disc. If the elastomeric
mounts are not properly positioned, they will require
removal and reinstallation. The removal process can
produce tears and abrasions in the mount that will
require a new replacement.

FIGURE 27

8) Apply the installation lubricant to the exterior surface
of the elastomeric mount to minimize damage when
pressing into the mounting disc. If the factory supplied
lubricant is not available, an acceptable alternative is
the use of common liquid soap.

FIGURE 28

Do not install an elastomeric mount without the use
of an approved lubricant. Installation without an
approved lubricant can produce tears in the mount,
resulting in substandard operational performance
and service life.

9) Support the elastomeric mount, 3/4 inch diameter
steel rod and mounting plate as depicted in FIGURE

28. The section of 3/4 inch diameter steel rod is utilized

SG87SH SURFACE SHARK FLOOR GRINDER PAGE 33

LUBRICATION REQUIREMENTS

Application: SG87SH SURFACE SHARK

Parts Required:

1 each, standard grease gun filled with one of the
following: ESSO Beacon 325, Shell
Alvania #2, Chevron SRI, or equivalent.
1 each, container of dry film lubricant.

1) Lubricate the caster wheel bearings with a dry film
lubricant only. Dry film lubricants dry immediately upon
contact. Use sparingly. Excess lubricant will attract the
fine grained, powdered materials produced during use
of the Floor Grinder that can directly affect bearing
service life.

Do not lubricate the caster wheels with any type of
grease material. Grease will attract foreign material
accumulations that can accelerate bearing wear.

2) The transmission shaft is supported by extra capacity,
ball bearings. Bearing are lubricated at the time of
manufacture and do not require additional servicing
when placing the unit in initial service. The remote­type, central lubrication system is a convenient method
for providing lubrication to bearings. FIGURE29. Zerk
grease fittings can promote improper service schedules
and an excessive amount of overgreasing. Excess
grease escaping from around the bearing insert seals
will attract foreign material accumulations that can
drastically shorten seal life. Excessive amounts of
grease in the bearing race cavity can actually increase
friction and resulting heat increases that can also
dramatically shorten bearing service life.

3) Standard bearing greasing intervals will range
from once every 8 hour work day to approximately
once every work week. Always maintain sufficient
grease around the circumference of the bearing insert
to provide its self-aligning feature and prevent the
formation of corrosion.

5) Do not apply belt dressing materials to the V-belt for
the purpose of minimizing slippage. These products
typically attract foreign material accumulations that
can accelerate component wear. Excessive V-belt
slippage can be eliminated with proper V-belt tension
and alignment.

ELECTRIC MOTOR SERVICE

Application: SG87SH SURFACE SHARK

The electric motor is capable of operating for many
years with a reasonably small amount of maintenance.
Before attempting to service the motor, disconnect
the Floor Grinder from the power source. Clean
the motor surfaces periodically, preferably with a
vacuum cleaner. Heavy accumulations of dirt and
dried materials will result in overheating and premature
failure of the motor.

The electric motor is equipped with higher capacity
ball bearings and under normal service and ambient
temperatures, should not require relubrication for many
years.
The seals utilized with the motor are intended to deliver
a longer service life in a concrete dust environment.
When replacing the seals, utilize only components
meeting the original factory specifications.

If you feel that the motor requires relubrication, contact
the local representative of the motor manufacturer
for specific information. Refer to your local Yellow
Page listing or website. Additional service can also be
obtained from local service centers which are members
of the Electrical Apparatus Service Association
(EASA).

TROUBLESHOOTING

ELECTRIC MOTOR

Application: SG87SH SURFACE SHARK

MOTOR FAILS TO START

FIGURE 29

PAGE 34 SG87SH SURFACE SHARK FLOOR GRINDER

ON/OFF switch in the OFF position. Turn the switch to
the ON position.

Improper voltage selection. Determine the available
voltage value from the power source. Determine
the power source voltage meets the nameplate
requirements of the electric motor.

Floor Grinder and/or extension cord is not plugged
into the power source. Determine that all electrical
connections have been properly made. The NEMA
6-20 Series cap and receptacle set is of a twist lock
configuration and requires a twist motion to ensure a
proper connection.

OPERATIONAL PROBLEMS

Application: SG87SH SURFACE SHARK

UNEVEN MULTI-ACCESSORY ATTACHMENT

WEAR

Incorrect installation of the attachment in the aluminum
disc. See INSTALLING A MULTI-ACCESSORY

ATTACHMENT (not including the multi-segmented,
dry diamond disc) IN THE ALUMINUM DISC.

Improper extension cord size and capacity. Operate
the Floor Grinder with copper stranded, 8 AWG or
larger extension cords. Improper extension cord size
and capacity will result in significant heat rise and
corresponding voltage and amperage drop.

Thermal protection device activated. To protect the
motor against heat related damage, an automatic
thermal protection switch is provided. High operating
temperatures will activate the switch and shut the
motor off. After the motor has cooled to an acceptable
temperature level, depress the switch to restart.

Circuit breaker activated. Push to reactivate the breaker
located on the operator handle near the ON/OFF
master switch.MOTOR LOSES POWER

Improper extension cord size and capacity. Replace
with cords meeting the required specifications.

Excessive extension cord length. Even with proper
extension cord size and capacity, excessive cord length
can reduce the available voltage and amperage to the
motor. Measure the available voltage to the motor
where the extension cord connects to the Floor Grinder
with a voltmeter. Reduce the extension cord length as
required to achieve the minimum voltage operating
specification as required by the motor manufacturer.

Insufficient available voltage and amperage at the
power source. Measure the available voltage at the
power source (usually a receptacle) with a voltmeter. If
the available voltage is below the minimum operating
specification as required by the motor manufacturer,
utilize an alternative power source.

Worn or damaged gimbal head Lord® rubber mounts.
Replace mounts.

Accumulation of foreign material on the multi-accessory
attachment. Clean and/or replace the attachment
components as necessary.

Flails and spacer washers are mounted too tight on the
scarifier frame. Remove and/or replace flails and spacer
washers. See MULTI-ACCESSORY ATTACHMENTS

AND APPLICATIONS.

EXCESSIVE JUMPING ON THE WORK SURFACE

Incorrect installation of the attachment in the
aluminum counterrotating disc. See INSTALLING

A MULTI- ACCESSORY ATTACHMENT (not
including the multi-segmented, dry diamond disc)
IN THE ALUMINUM DISC.

Worn or damaged gimbal head Lord® rubber mounts.
Replace mounts.

Loose gimbal head fasteners. Retorque fasteners as
required.

ACCELERATED V-BELT WEAR

Misaligned and/or improperly tensioned pulleys.
Readjust pulleys and V-belt. See CHECKING V-BELT
TENSION AND ALIGNMENT.

Worn pulleys. Replace pulleys as required. See

INSTALLING A REPLACEMENT V-BELT OR
PULLEY.

Improper motor cooling. See ELECTRIC MOTOR
SERVICE.

Excessive load to the motor. See OPERATING THE
FLOOR GRINDER ON THE JOB SITE.

Improper V-belt. Replace with a name brand B45
series V-belt. See INSTALLING A REPLACEMENT

V-BELT OR PULLEY.

SG87SH SURFACE SHARK FLOOR GRINDER PAGE 35

ACCELERATED BEARING WEAR AND/OR

FAILURE

Misaligned and/or improperly tensioned
pulleys. Readjust pulleys and V-belts. See
CHECKING V-BELT TENSION AND ALIGNMENT.

Bent transmission shaft. Replace shaft.

Improper lubrication. See LUBRICATION

REQUIREMENTS.

3) Check all visible parts for wear, breakage or damage.
Order any part required to make the necessary repair.
This will avoid a needless delay when operating the
Floor Grinder at next use.

4) Apply a dry film lubricant to all exposed metal
components to prevent the formation of rust.

5) Store the Floor Grinder inside. If the Floor Grinder
must be stored outside, protect it with a suitable
covering.

UNEVEN GRINDING ACTION

Excessive material build-up on the caster wheel face
surface. Remove material. Readjust wheel scrapers to
properly remove material build-ups.

Excessive caster wheel bearing wear. Replace the
caster wheel. Excessive axle wear. Replace axle.

Flails and/or spacer washers are mounted too tight
on the scarifier frame. Remove and/or replace flails
and spacer washers. See MULTI-ACCESSORY

ATTACHMENTS AND APPLICATIONS.

Mixing new and worn flails, silicon carbide stones,
etc. Remove and replace with components of
the same, approximate size and diameter. See

MULTI- ACCESSORY ATTACHMENTS AND
APPLICATIONS.

STORAGE

Application: SG87SH SURFACE SHARK

Proper procedure for long term storage of the Floor
Grinder will protect it against the effects of corrosion
and damage. If the Floor Grinder is not to be operated
for a period of 30 days or more, proceed to store as
follows:

1) Clean all accumulated foreign material from the
Floor Grinder utilizing an appropriate safety solvent.

SPECIFICATIONS

Application: SG87SH SURFACE SHARK

POWER SOURCE

TYPE 1½ hp, totally enclosed, fan-cooled, capacitor­start, 1725 RPM, single phase, 115 VAC, 60 Hz.

FULL LOADED AMPERAGE (FLA) 13.7 amperes

STARTING POWER REQUIRED (SPR) 69
amperes
SPR = (FLA) x 5 Factor

FRAME

STRUCTURE Unitized, welded steel plate

DRIVE REDUCTION SYSTEM B45 Series belt/pulley

MAXIMUM GRINDING WIDTH 12" (305 mm)

OVERALL MACHINE WIDTH 28½" (724 mm)
OVERALL MACHINE 28" (711 mm)
LENGTH (Handle Folded)

OVERALL MACHINE 39" (991 mm)
LENGTH (Operating Configuration)

TYPICAL OPERATOR 40½" (1029 mm)
HANDLE HEIGHT (Maximum Extension)

VACUUM SYSTEM 3" (76 mm) diameter
CONNECTION

Observe all applicable safety precautions for the
solvent.

2) Follow the procedure as outlined in the material
supplied by the electric motor manufacturer describing
long term storage for the motor.

GENERAL

BASIC WEIGHT 242 lbs (110 kg)

PAGE 36 SG87SH SURFACE SHARK FLOOR GRINDER

Replacement Part Diagrams

SG87SH SURFACE SHARK Floor Grinder

SG87SH SURFACE SHARK FLOOR GRINDER PAGE 37

Operator Handle Assembly

SG87SH SURFACE SHARK Floor Grinder

PAGE 38 SG87SH SURFACE SHARK FLOOR GRINDER

Operator Handle Assembly

SG87SH SURFACE SHARK Floor Grinder

Reference

Number

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15

16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42

43
44
45
46
47

PART

NUMBER

MSG87SH-0180
MSG87SH-0110

M310-0030
MSG87SH-0415
MSG87SH-0280
MSG87SH-0190

M660-0900

MWS-277

MSG87SH-0350

MFCS16-0300

MSG87SH-0340

M310-0081
MSG87SH-0070
MSG87SH-0050

M37041300

MSG87SH-0170
MSG87SH-0150
MSG87SH-0160
MSG87SH-0380

M17060000
M16040000
M90040000

MFCS16-1000

MWIRE NUT Y
MSG87SH-0260
MSG87SH-0270

MHUB-4720C

MFCS16-0210

M62081400

MFCS16-0340

M86060000

MCG-5050

M801
M15060800
M16060000
M15050400
M16050000

MKIC-172

M18010000

MSG87SH-0080
MSG87SH-0090

M34010800

MSG87SH-0100

M58010000

MSG87SH-0300-020
MSG87SH-0300-010
MSG87SH-0300-030

DESCRIPTION QTY

Handle, Lower

Handle, Top

Throttle, Twist Control, Plastic, Complete

Grip, 7/8", Black

Clamp, Hose

Cover, Switch

Mount, Rubber

Assembly, Swivel

Spring, Compression

Grommet

E-Clip, 7/32" External

Cable, Throttle

Switch, 115V

Knob Assembly

Screw, Machine, Pan Head Phillips,

1/4-20 UNC x 1-5/8", Plated

Cam, Switch

Tube, Pivot

Lever, Switch

Screw, Wood, Flat Head Phillips, #12 x 7/8"

Washer, Flat, 3/8", Plated

Washer, Lock, 1/4", Plated

Nut, Acorn, 1/4-20 UNC, Plated

Extension Cord, GFCI

Nut, Wire, Yellow

Cable, Switch To Plug

Cable, Switch To Motor

Plug, Twist Lock, Male, 15A

Pin With Lanyard

Bolt, Shoulder, 1/2 x 1-3/4"

Bushing, Bronze, 1/2" ID

Nut, Hexagon, Flange, 3/8-16 UNC, Plated

Relief, Strain

Nut, Bulkhead (Included With Reference Number 32)

Screw, Cap, 3/8-16 UNC x 1", Plated

Washer, Lock, 3/8", Plated

Screw, Cap, 5/16-18 UNC x 1/2", Plated

Washer, Lock, 5/16", Plated

Ring, Kick Out

Hut, Hexagon, #6-32, Plated

Circuit Breaker, 15 AMP

Cover, Circuit Breaker

Screw, Machine, Pan Head Phillips,

#6-32 UNC, x 1", Plated

Wire, Jumper

Washer, Lock, External Tooth, #6

Cover, Master Switch

Switch, Master Toggle

Face Plate, ON/OFF

1
1
1
1
2
1
2
1
1
1
1
1
1
2
5

1
1
1
2
2
5
5
1
3
1
1
1
2
2
4
2
2
2
2
2
4
4
2
2
1
1
2

1
2
1
1
1

SG87SH SURFACE SHARK FLOOR GRINDER PAGE 39

Electric Motor Assembly

SG87SH SURFACE SHARK Floor Grinder

PAGE 40 SG87SH SURFACE SHARK FLOOR GRINDER

Electric Motor Assembly

SG87SH SURFACE SHARK Floor Grinder

Reference

Number

1
2
3
4
5
6

7
8

9
10
11
12
13
14
15

PART

NUMBER

MSG87SH-0030
MSG87SH-0250

MCG-5050

M801

MSG87SH-0400

M31050600

M63030800
MCS8-0470
M17060000
M16060000
M18060000
M17040000
M53050000
M15050800

MB45

DESCRIPTION QTY

Motor, Electric, 1-1/2 HP, 115 VAC

Mount, Electric Motor

Relief, Strain

Nut, Bulkhead (Included With Reference Number 3)

Pulley

Screw, Set, Cup Point, 5/16-18 UNC x 3/8"

(Included With Reference Number 5)

Key, Square, 3/16" x 3/16" x 1"

Screw, Cap, 3/8-16 UNC x 3-1/2", Full Thread, Plated

Washer, Flat, 3/8", Plated

Washer, Lock, 3/8", Plated

Nut, Hexagon, 3/8-16 UNC, Plated

Washer, Flat, 1/4", Plated

Nut, Hexagon, Nyloc®, 5/16-18 UNC, Plated

Screw, Cap, 5/16-18 UNC x 1", Plated

Belt, V Type

1
1
1

Reference

1
1

1
2
6
4
6
4
4
4
1

SG87SH SURFACE SHARK FLOOR GRINDER PAGE 41

Wheel Dolly Assembly

SG87SH SURFACE SHARK Floor Grinder

PAGE 42 SG87SH SURFACE SHARK FLOOR GRINDER

Wheel Dolly Assembly

SG87SH SURFACE SHARK Floor Grinder

Reference

Number

1
2
3
4
5
6
7
8
9

10
11
12
13

PART

NUMBER

MSG24-0190
MSG24-0260

MSG87SH-0370

M62121200
M17120000
M22022400
M20031200
M15081000
M16080000

M660-0410
M17100000
M18100000

MSG87SH-0200

DESCRIPTION QTY

Arm, Swing

Wheel

Scraper, Wheel

Bolt, Shoulder, 3/4-10 UNC x 1-1/2"

Washer, Flat, 3/4", Plated

Pin, Cotter, 5/32" x 1-1/2", Plated

Pin, Roll, 3/16" x 1-1/2"

Screw, Cap, 1/2-13 UNC x 1-1/4", Plated

Washer, Lock, 1/2", Plated

Bearing, Oilite®

Washer, Flat, 5/8", Plated

Nut, Hexagon, 5/8-11 UNC, Plated

Axle, Plated

2
2
2
2
2
2
2
2
2
2
2
2
1

SG87SH SURFACE SHARK FLOOR GRINDER PAGE 43

Plastic Body

Magura® Throttle Control Assembly

SG87SH SURFACE SHARK Floor Grinder

PAGE 44 SG87SH SURFACE SHARK FLOOR GRINDER

Plastic Body

Magura® Throttle Control Assembly

SG87SH SURFACE SHARK Floor Grinder

Reference

Number

1
2
3
4
5
6
7
8

PART

NUMBER

M310-0030-010-A
M310-0030-020-A

M310-0020-030
M310-0030-040
M310-0030-050
M310-0030-060
M310-0030-070
M310-0020-080

DESCRIPTION QTY

Body Assembly, (Includes P/N 310-0030-040, Qty 2)

Tube, Throttle (Includes P/N 310-0020-030)

Grip, Handle

Screw, Pan Head, M5 x 20

Screw, Self Tapping

Cover, Top

Sheave, Roller

Boot, Rubber

1
1
1
2
1
1
1
1

SG87SH SURFACE SHARK FLOOR GRINDER PAGE 45

Safety And Dust Shield Assembly

SG87SH SURFACE SHARK Floor Grinder

PAGE 46 SG87SH SURFACE SHARK FLOOR GRINDER

Safety And Dust Shield Assembly

SG87SH SURFACE SHARK Floor Grinder

Reference

Number

1
2
3
4
5
6
7
8

PART

NUMBER

MSG87SH-0230
MSG87SH-0220
MSG87SH-0060

M56480000

MSG87SH-0040

M53050000
M15050700
M61040800

DESCRIPTION QTY

Skirt Assembly

Bumper, Rubber

Hose, Vacuum

Clamp, Hose, 3"

Strap, Skirt

Nut, Hexagon, Nyloc®, 5/16-18 UNC, Plated

Screw, Cap, 5/16-18 UNC x 7/8", Plated

Screw, Countersunk, 1/4-20 UNC x 1", Plated

1
1
1
2
2
4
4
7

SG87SH SURFACE SHARK FLOOR GRINDER PAGE 47

Cutter Assembly SHARK TOOTH

Coating Removal System

SG87SH SURFACE SHARK Floor Grinder

PAGE 48 SG87SH SURFACE SHARK FLOOR GRINDER

Cutter Assembly SHARK TOOTH

Coating Removal System

SG87SH SURFACE SHARK Floor Grinder

Reference

Number

7
8

9
10
11
12
13
14
15
16
17

PART

NUMBER

WEDGE
53050000
87052000
18040000
16040000

SG24-1900-010
SG24-1900-020

J-2005-2A

SG24-1900-040
SG24-1900-030

27041000

DESCRIPTION QTY

Wedge, Plastic

Nut, Hexagon, 5/16-18 UNC, Nyloc

Bolt, Carriage, 5/16-18 UNC x 2-1/2", Plated, Grade 5

Net, Hexagon, 1/4-20 UNC, Plated

Washer, Lock, 1/4, Plated

Housing

Holder, Insert

Mount, Rubber

Spacer

Insert, Tungsten Carbide

Screw, Countersunk, 1/4-20 UNC x 1-1/4"

®

, Plated

1
1
1
2
2
1
1
1
2
2
2

SG87SH SURFACE SHARK FLOOR GRINDER PAGE 49

Grinding Block Assembly DIAMOND TOOTH

Diamond Grinding System

SG87SH SURFACE SHARK Floor Grinder

PAGE 50 SG87SH SURFACE SHARK FLOOR GRINDER

Grinding Block Assembly DIAMOND TOOTH

Diamond Grinding System

SG87SH SURFACE SHARK Floor Grinder

Reference

Number

1
2
3
4
5

PART

NUMBER

MSG24-2101-010
MSG24-2101-030

M83040901

WEDGE

SG24-2101-020

DESCRIPTION QTY

Block

“O” Ring

Pin, Retaining (Stainless Steel)

Wedge, Plastic

Pin, Diamond, Yellow Identification Color

(40-50 Grit, For General Purpose Use)

1
3
3
1
3

SG87SH SURFACE SHARK FLOOR GRINDER PAGE 51

Marshalltown, IA

Phone [phone]

Fax [phone]

www.marshalltown.com