Marshalltown SP684 User Manual

OPERATOR’S MANUAL

Includes Safety, Service and Replacement

Part Information

Model SP684

SURFACE SHARK™

Surface Planer

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

SURFACE PLANER 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

ASSEMBLY

Removing the Surface Planer from the pallet ..................................................................................... 11

Filling the Engine Crankcase with Oil ................................................................................................. 11

Filling the Engine Fuel Tank................................................................................................................ 12

OPERATION

California Proposition 65 Disclaimer ................................................................................................... 12

Spark Arrestor Disclaimer ................................................................................................................... 12

Theory of Operation ............................................................................................................................ 12

Flail Design and Application ................................................................................................................ 13

Spacer Washers .................................................................................................................................. 15

Flail Drum Rods ................................................................................................................................... 16

Flail Drum Design and Application ...................................................................................................... 18

Installing Flails on the Two Section Drum ........................................................................................... 19

Installing a Loaded Drum on the Driveshaft ........................................................................................ 22

Transporting the Floor Grinder ............................................................................................................ 22

Starting the Surface Planer on the Job Site ........................................................................................ 23

Operating the Surface Planer on the Job Site .................................................................................... 24

Stopping the Surface Planer on the Job Site ...................................................................................... 28

SERVICE

Preventative Maintenance Check List ................................................................................................. 28

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

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

Installing a Replacement Bearing on the V-Belt Side ......................................................................... 33

Installing a Replacement Bearing on the Outboard Side .................................................................... 35

Lubrication Requirements ................................................................................................................... 37

Aligning the Caster Wheels ................................................................................................................. 38

Checking Driveshaft Run Out .............................................................................................................. 39

Engine Service ....................................................................................................................................40

TROUBLESHOOTING

Engine .................................................................................................................................................40

Operational Problems ......................................................................................................................... 41

STORAGE .......................................................................................................................................... 42

SPECIFICATIONS ............................................................................................................................... 42

REPLACEMENT PARTS DIAGRAMS ................................................................................................43

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 Surface Planer without first reading this Operator’s Manual and becoming
familiar with its operation. The manufacturer of this Surface Planer 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 material
removal and/or preparation of work surfaces. Yet, the possibility exists that the Surface Planer 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 Surface Planer 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 Surface Planer 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 Surface Planer. 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
Surface Planer. 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 SP684 SURFACE SHARK SURFACE PLANER

The concept of portable, low horsepower type surface planing equipment has been successfully
utilized for many years as a practical solution to many types of surface preparation job requirements.
The basic concept is proven and well accepted within the associated marketplaces as an alternative
method to manual labor and other types of machines and methods. Use of a Surface Planer 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. Each operator
is required to supply a reaction type force that counteracts/balances and/or resists the forces
generated during the surface planing process. The body parts most noticeably affected during the
planing process are the arms, hands, wrists, shoulders, lower back and legs. The planing 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 the planing process. 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 Surface Planer. Use of the Surface Planer may only aggravate this and
any other medically related problem. The forces generated and/or encountered correspond to the
natural laws of physics and are inherent to the planing process. They can not be changed or totally
eliminated with portable hand held and operated, surface planing equipment of this design. Proper
operating positions and techniques, as outlined in this manual, can be successfully utilized to
minimize the effects of the reaction forces upon the human body. 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 surface planing process. The normal planing process includes the flails striking
a wide variety of surface materials and compositions and the resulting reaction forces created. Each
potential operator of the Surface Planer must be made aware of and assume the operational and
physical liability described and/or associated with the planing process when utilizing the Surface
Planer. Each potential operator not willing to assume the operational and physical liability described
and/or associated with the planing process should not operate the Surface Planer. Proper levels
of operator experience, skill and common sense are essential for maximizing the safe and efficient
operation of the Surface Planer.

Record the Surface Planer and engine/electric motor serial numbers in the spaces provided below.

_______________ Model Number

_______________ Serial Number

_______________ Engine 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

SP684 SURFACE SHARK SURFACE PLANER PAGE 5

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.

OPERATOR INSTRUCTIONAL DATA SHEET

The following undersigned operators of the Surface Planer 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, COMPREHE NSION AN D ACKNOWLEDGEMENT OF THE MATE RIAL
COMPRISING THE ENTIRE CONTENTS OF THE APPLICABLE OPERATOR’S MANUAL
AND SAFETY AND OPERATIONAL INFORMATION VIDEO FOR THE SURFACE PLANER.

2) FORMALIZED OPERATOR’S SAFETY PROGRAM TO BE DEVISED BY THE OWNER OF THE
SURFACE PLANER IN CONJUNCTION WITH THE CONTENTS OF THE APPLICABLE OPERATOR’S
MANUAL FOR THE SURFACE PLANER.

3) OSHA RULES AND REGULATIONS RESEARCHED FOR AND/OR BY THE OWNER OF THE SURFACE
PLANER AND DEEMED APPLICABLE TO THE SAFE AND PROPER USE AND/OR OPERATION OF THE
THE SURFACE PLANER FOR ANY SPECIFIC JOB APPLICATION.

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

5) FORMALIZED MAINTENANCE PROGRAM FOR THE SURFACE PLANER TO BE DEVISED BY THE
OWNER OF THE SURFACE PLANER 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
SURFACE PLANER AS PER THE CONTENTS OF THE APPLICABLE OPERATOR’S MANUAL.

_______________ 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 SP684 SURFACE SHARK SURFACE PLANER

SAFETY PRECAUTIONS

THE FOLLOWING SAFETY PRECAUTIONS
PROVIDE SOME COMMON SENSE GUIDES
TO PROMOTE SAFETY AND EFFICIENCY
WITH THE SURFACE PLANER. 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 SURFACE
PLANER AND ARE NOT INTENDED TO BE
ALL INCLUSIVE. PROPER LEVELS OF
OPERATOR EXPERIENCE, SKILL AND
COMMON SENSE ARE ESSENTIAL FOR
SAFE AND EFFICIENT OPERATION.

THE ENGINE EX HAUST ALO NG W ITH
THE DUSTS/BYPRODUCTS FROM THE
COVERING REMOVAL PROCESS
ASSOCIATED WITH THE OPERATION OF
THE SURFACE PLANER CAN CONTAIN
CHEMICALS KNOWN TO THE STATE OF
CALIFORNIA TO CAUSE CANCER, BIRTH
DEFECTS OR OTHER REPRODUCTIVE
HARM. THIS STATEMENT IS MADE IN
COMPLIANCE TO CALIFORNIA
PROPOSITION 65.

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

PREPARATION

1) The Surface Planer 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 the Surface
Planer before being allowed to utilize it. BEFORE
attempting to utilize the Surface Planer, read this
Operator’s Manual to familiarize each operator
with its correct operating procedures. Avoid the
urge not to take the necessary time to read this
Operator’s Manual before operating the Surface
Planer. DO NOT OPERATE THE SURFACE
PLANER UNTIL EACH OPERATOR COMPLETELY
COMPREHENDS THE CONTENTS OF THIS
MANUAL , AP PLICABL E SU PPLEMEN TAL
INFORMATION AND THE INFORMATION SUPPLIED
BY THE ENGINE MANUFACTURER.

2) Develop a comprehensive program for the safe
operation of the Surface Planer 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 Surface Planer
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 Surface Planer 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 Surface Planer, contact the Customer Service
Department for specific information BEFORE
utilization. There is no charge for this service. Do not
operate the Surface Planer without the use of the
original equipment V-belt guard. Use of the planer
without an approved belt guard can lead to property
damage and/or personal injury.

4) Minors should never be allowed to operate the
Surface Planer. Bystanders, especially children and
animals, should not be allowed in the area where the
Surface Planer is in use. The covering removal
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

SP684 SURFACE SHARK SURFACE PLANER PAGE 7

property damage and/or personal injury. Keep all body
parts, loose clothing, foreign objects and onlookers
clear while equipment is in operation.

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

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 Surface
Planer is strenuous. If you have any condition that
might be aggravated by strenuous work, check with
your doctor BEFORE operating the Surface Planer.
Guard against the possibility of back related injuries.
Always lift the Surface Planer with leg muscles and
not with the back. Use of the Surface Planer requires
that the operator be of the proper height, weight
and strength to maximize operational efficiency and
minimize the possibility of personal injury.

6) Prolonged use of the Surface Planer (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 Surface Planer. 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(s) where there is a
danger of head injuries.

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

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

a) Disconnect the engine spark plug wire.

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.

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

e) Inspect the flail drum and flails/spacer washers for
for excessive wear and structural integrity. Replace
each component as necessary. The flail drum and flails
rotate at high speed during the planing process and
are subject to high wear rates.

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

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

h) Re-connect the spark plug wire.

11) Contact appropriate representatives to determine if/
where electrical cables, gas lines and other hazardous
items are buried under the work surface BEFORE
utilization. The Surface Planer 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.

12) Know how the controls operate. Know how to stop
the engine quickly in an emergency. Always start the
engine with the flail drum raised to its maximum height
from the work surface 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.

13) When operating the Surface Planer with an
electrically powered vacuum system on a surface
containing water or other electrically conducting

PAGE 8 SP684 SURFACE SHARK SURFACE PLANER

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 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. 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 receptacle and plug the Surface Planer 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
Surface Planer. 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 Surface Planer. Do not
attempt to eat and/or drink while utilizing the Surface
Planer. Determine that eyeglasses and/or hearing
aid devices are properly secured.Use of the Surface
Planer is strenuous and causes fatigue. Help prevent
the cause of an accident. Plan to take work breaks as
required to help maintain proper mental and physical
alertness.

2) This Surface Planer 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) Gasoline is an extremely flammable fuel. Use
extreme caution when handling gasoline or mixing fuel.
Always utilize UL®, CSA® or CE approved containers
for the storage and transportation of fuel. Do not
smoke or bring fire or flame near the fuel. Always shut
off the engine and allow it to cool before refueling.

Never remove the fuel tank filler cap while the engine
is running. Never operate an engine without a fuel tank
filler cap. Select bare ground for fueling and move at
least 10 feet from the fueling spot before starting the
engine. Wipe off any spilled fuel before starting the
engine and check for leakage. If a fuel or oil leak is
found, do not start or run the engine until the leak is
fixed and the spillage has been wiped away. Take care
not to get fuel or oil on your clothing. If this happens,
change your clothing immediately. Before operating
the Surface Planer, refer to the Specifications section
of this manual for more detailed information regarding
fuel and lubrication requirements.

4) The Surface Planer is designed for use by one
operator. Use of the Surface Planer by more than one
operator can lead to confusion and loss of control,
resulting in property damage and/or personal injury.
If it is felt that more than one person is required to
operate the Surface Planer, STOP and contact the
Customer Service Department for specific operational
and service/maintenance information. There is no
charge for this service.

5) Do not operate the Surface Planer with onlookers
close by. Caution all onlookers to stand clear. The
planing 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 and foreign objects clear of the rotating
drum and flails.

6) Never start the engine or electric motor without first
raising the flail drum to its maximum height from the
work surface 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.

7) Start and operate the Surface Planer only in a

well ventilated area. Carbon Monoxide fumes given
off by an engine operating from standard fuels are
poisonous. Breathing these fumes can result in
property damage and/or personal injury.

Operate the Surface Planer 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
Surface Planer running unattended.

SP684 SURFACE SHARK SURFACE PLANER 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 with the Surface Planer on
cracked, uneven or irregular surfaces. Never start the
engine with the flails and/or flail drum in contact with
the work surface. Such occurrences can lead to the
loss of machine control and the possibility of property
damage and/or personal injury.

10) Contact with a hot, engine muffler 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 after each use. This practice
will maximize bearing and V-belt service life.

12) Because this Surface Planer 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 site surface
conditions and operator experience/skill/common sense
recommendations for this Surface Planer 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 this manual.

4) Always properly maintain the Surface Planer.
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 Surface Planer 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 planer 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 genuine, factory approved,
replacement parts only.

8) The Surface Planer utilizes 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 material supplied by the engine or
electric motor manufacturer for specific information
relative to proper operational, lubrication and storage
requirements.

3) Always stop the engine and disconnect the spark
plug wire BEFORE checking or working on the Surface
Planer.

PAGE 10 SP684 SURFACE SHARK SURFACE PLANER

ASSEMBLY

The SP684 SURFACE SHARK Surface Planer 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 Surface Planer
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.

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

Check all fasteners for security. Consult a fastener
torque chart for the proper torque value if any fastener
is found to require retorquing.

FILLING THE ENGINE CRANKCASE WITH OIL

Application: SP684 Surface Planer

Note: The Surface Planer is test run at the factory
and is subject to a number of operational tests before
shipment. This requires the engine crankcase to be
filled with oil to the proper level. No further addition of
oil is required prior to placing a new unit in service. In
normal operational service, to fill the engine crankcase
with oil after first draining the crankcase, proceed as
follows:

Tools Required:

1 each, small, clean funnel

REMOVING THE SURFACE PLANER FROM THE

PALLET

Application: SP684 Surface Planer

Tools Required:

1 each, pliers
1 each, claw hammer or hammer and an appropriate
pry bar
2 each, 1/2 inch wrenches

The Surface Planer is secured to the pallet with steel
banding. Using the pliers, cut and remove the banding.
The Surface Planer is secured to the pallet with a tie­down clamp. Using the 1/2 inch wrenches, remove
the tie-down clamp. The Surface Planer can then be
removed from the pallet.

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.

1)The SP684 Surface Planer is available equipped
with a number of industrial quality, gasoline and diesel
engines. Consult the material supplied by the engine
manufacturer for the engine that has been ordered with
your Surface Planer. Carefully review this material to
become familiar with specific operating characteristic,
recommendations and service requirements.

2) Determine the location(s) of both the oil filler and oil
drain plug(s).

3) Wipe oil, dust and accumulated dirt from the filler
plug area.

4) Using the funnel, fill the engine crankcase with a
high grade motor oil. Consult the material supplied by
the engine manufacturer for proper amount, weight
and service classification.

5) Replace the oil filler plug and tighten. Wipe off any
excess oil spilled on the engine crankcase and Surface
Planer.

6) Do not operate the engine unless proper oil level is
maintained as per the material supplied by the engine
manufacturer.

The Surface Planer is shipped from the factory
completely assembled. If ordered with the Surface
Planer, the flail drum and flail kit are normally installed
on the flail drum driveshaft. Additional flail drums and
flail kits or replacement parts are normally shipped
separately.

SP684 SURFACE SHARK SURFACE PLANER PAGE 11

FILLING THE ENGINE FUEL TANK

Application: SP684 SURFACE SHARK.

THE MATERIAL SUPPLIED BY THE ENGINE
MANUFACTURER FOR INFORMATION RELATIVE
TO PROPER FUELING PROCEDURES.

Tools Required:

1 each, small, clean funnel

Never mix oil with gasoline. Four cycle engines are
not designed to be operated with oil mixed with the
gasoline.

1) Determine the location of the fuel tank filler cap.

2) Carefully clean the filler cap and surrounding area
to insure that no dirt or debris falls into the fuel tank.
Remove the filler cap.

3) Fill the fuel tank with fresh, clean, unleaded
automotive gasoline. Leaded “regular” grade gasoline
is an a acceptable substitute. DO NOT USE GASOLINE
CONTAINING METHANOL (WOOD ALCOHOL)
Gasoline containing a maximum of 10 percent ethanol
or grain alcohol (sometimes referred to as Gasohol)
may be used but requires special care when the
engine is stored for extended periods.

4) Use of a properly blended gasoline for operation
during the intended season will result in easier engine
starting. Do not use gasoline left over from the previous
season of operation.

5) Do not overfill the tank or spill any fuel. If the fuel
tank incorporates a screen mesh to prevent debris
from falling into the tank, do not remove to increase the
fill rate. Replace the filler cap. Wipe away any excess
spilled fuel.

OPERATION

CALIFORNIA PROPOSITION 65 DISCLAIMER

Application: SP684 SURFACE SHARK

THE ENGINE EXHAUST AND BY/PRODUCTS FROM
THE OPERATIONAL PROCESS OF THIS PRODUCT
CONTAIN CHEMICALS KNOWN TO THE STATE OF
CALIFORNIA TO CAUSE CANCER, BIRTH DEFECTS,
OR OTHER REPRODUCTIVE HARM.

SPARK ARRESTOR DISCLAIMER

Application: SP684 SURFACE SHARK

DO NOT OPERATE THE SURFACE PLANER ON
ANY FOREST COVERED, BRUSH COVERED, OR
GRASS COVERED, UNIMPROVED AREAS UNLESS
AN APPROVED SPARK ARRESTOR IS INSTALLED
ON THE MUFFLER. THE SPARK ARRESTOR
MUST BE MAINTAINED IN PROPER WORKING
ORDER BY THE OWNER AND/OR OPERATOR.
IN THE STATE OF CALIFORNIA, THE ABOVE IS
REQUIRED BY LAW. OTHER STATES MAY HAVE
SIMILAR LAWS. FEDERAL LAWS WILL APPLY ON
FEDERAL LANDS. LAWS WILL VARY WITH USE IN
SPECIFIC COUNTRIES.

THEORY OF OPERATION

Application: SP684 SURFACE SHARK

The SP684 Surface Planers operate on the principle
of various flail configurations being operated at high

DO NOT SMOKE NEAR THE FUEL TANK. DO NOT
FILL THE FUEL TANK WITH THE ENGINE RUNNING
OR IF IT IS HOT. ANY FUELS ARE EXTREMELY
FLAMMABLE. ALLOW AMPLE TIME BETWEEN
EACH REFUELING FOR THE ENGINE TO COOL.
AN IGNITION SOURCE IN CLOSE PROXIMITY
TO THE FUEL TANK CAN BE THE SOURCE OF
AN EXPLOSION, RESULTING IN PROPERTY
DAMAGE AND/OR PERSONAL INJURY.CONSULT

rotational speeds to make direct contact with a work
surface. A series of flails are spaced and aligned on
shafts that span a specified width and rotate on a drum
that can be raised or lowered at the discretion of the
operator. The specific flail configuration and impact
rate directly affect the rate of material removal from the
work surface, the resulting surface profile and texture.

PAGE 12 SP684 SURFACE SHARK SURFACE PLANER

The planing process is directly controlled by these
conditions:

Several Factors Directly Affect the Selection of a
Flail Design for a Specific Job Application:

1) The use of a suitable mechanism (flail) of sufficient
strength and hardness to impact the work surface and
remove material while delivering an acceptable service
life.

2) Sufficient static weight supporting the flails which
allow them to effectively penetrate the work surface
and remove material.

3) Adequate horsepower capable of propelling the
rotating flails 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 planing
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 flail type, condition, configuration,
spacing along the width of the flail drum and feed
rate are direct factors that will determine the overall
success of the job application.

FLAIL DESIGN AND APPLICATION

While individual flail design and configuration may
vary, basic operational characteristics are identical:
impact a work surface material and remove a
percentage of the material. This common operational
characteristic has led to the development of two basic
flail configurations:

1) High carbon, heat treated, alloy steel designed for
direct contact and removal of the surface material. The
high carbon content of the flail material also helps to
improve service life

1) The type and amount of material to be removed from
the work surface. Materials of higher yield and tensile
strengths along with the actual volume of material to
be removed will generally be the first factors under
consideration.

2) Purchase costs versus service life. The original
purchase cost of plain, heat treated steel flails must
be compared against the substantially higher costs
of tungsten carbide insert flails. In turn, these costs
must be compared to anticipated service life. All flails,
whether of high speed steel or tungsten carbide insert
design, will eventually wear to the point of requiring
replacement. The amount of unproductive time spent
to replace worn flails on a job can be substantially
greater than the actual replacement cost of many flails.
It then becomes a balance between purchase cost,
productivity, service life and labor cost.

3) Surface finish and texture. The finest grained surface
finish available from the planing process is comparable
to a “swept or broomed” like finish. FIGURE 1. If a
smooth, flat finish is desired, the planing process must
be followed with a grinding or polishing type process.
Many job requirements may call for large amounts of
material to be removed, but followed with additional
specifications requiring a finer surface finish or texture.
Many times these jobs dictate the use of an aggressive
flail configuration because of productivity and cost
considerations. Less aggressive flail configurations
can then be utilized for the final finishing sequence.
Generally speaking, the more aggressive the flail
configuration, the more coarse the resulting finish and
texture.

2) High carbon, heat treated, alloy steel with tungsten
carbide inserts brazed into the flail body. The tungsten
carbide inserts are intended to directly contact the work
surface and remove material. The inserts effectively
resist wear and usually deliver a substantially longer
service life than the plain, heat treated steel types. The
flail body is designed to serve as a matrix or support for
the tungsten carbide inserts, hence the requirement for
heat treatment. The heat treatment process also aids
the flail body in resisting wear.

FIGURE 1

SP684 SURFACE SHARK SURFACE PLANER PAGE 13

Many flail configurations are available to meet a
wide variety of job application and surface material
specifications. To give additional perspective to each
configuration a rating system of 1 to 10 (10 being
highest) has been devised.

Beam Flail

The beam type flail is manufactured from high carbon,
alloy steel that is thoroughly hardened for additional
service life. FIGURE 2. It is highly effective for
scabbling or scarifying and delivers medium to coarse
surface finish texture. Designed for medium to high
speed material removal of the work surface.

Pentagonal Flail

The pentagonal flail is manufactured from high carbon,
alloy steel that is thoroughly hardened for additional
service life. FIGURE 3. Each section of the five sided
design features a small, tungsten carbide insert that is
first placed in a small hole and then held in position with
copper brazing. It is highly effective for scabbling or
scarifying and delivers medium to coarse surface finish
texture. Designed for high speed material removal of
the work surface.

FIGURE 2

Suggested applications:

1) Medium duty asphalt and concrete milling

2) Descaling steel decks

3) Removing thick material build-ups of greases,
paints, oils, vegetable powders and resins from non­wood type floors

4) Dried, fully cured, carpet and tile adhesive removal

5) Painted traffic line removal

COST 1
PRODUCTIVITY 5
SERVICE LIFE 2

The beam flail should be replaced when the outside
diameter is worn to approximately 1-5/16 inch or the
inside diameter elongates to approximately 3/4 inch.

FIGURE 3

Suggested applications:

1) Heavy duty asphalt and concrete milling

2) Milling concrete joints

3) Asphalt and concrete grooving

The pentagonal flail is designed for more aggressive
and rapid removal of a surface in comparison to
the beam flail. The addition of the tungsten carbide
inserts contributes to its long service life and higher
production rates. The tungsten carbide is also the main
reason for the cost differential between it and the other
flails. The design configuration yields a rather coarse
surface finish and texture. For many job applications,
this finish and texture will be satisfactory. Some
applications may require an additional smoothing
process. For example: removing high spots or other
irregularities from sidewalks. The initial process would
utilize pentagonal flails for productivity and service life
reasons. If the resulting surface finish is too coarse to
meet specifications, it can be smoothed with the use of
the beam flails.

COST 10
PRODUCTIVITY 8
SERVICE LIFE 10

PAGE 14 SP684 SURFACE SHARK SURFACE PLANER

The pentagonal flail should be replaced when two
successive tungsten carbide inserts break off or the
inside diameter elongates to approximately 3/4 inch.
In service, the flail body will wear much faster than
the tungsten carbide inserts. The copper brazing
used to weld the inserts into the body can fail and an
insert break off. The flail can still be used in service.
It will just wear a little faster and more uneven in that
particular area. As a general rule, a pentagonal flail
can be utilized until there has been body wear that will
no longer support the tungsten carbide inserts.

Milling Flail

The milling flail is manufactured from high carbon,
alloy steel that is heat treated for additional service
life. FIGURE 4. Each section of the five sided design
features a rectangular, tungsten carbide insert that is
held in position with copper brazing. The milling flail
is primarily designed for “climb” milling applications.
This requires that the Surface Planer be pulled toward
the operator when being utilized. Removal rates are
dependent upon both surface and substrate material
composition.

To realize maximum service life, milling flails should
not be utilized for the direct removal of concrete
and asphaltic work surface materials. Such use will
drastically reduce their service life and substantially
increase project costs.

SPACER WASHERS

Application: SP684 SURFACE SHARK

Spacer washers are stamped from high carbon, alloy
steel that is heat treated for additional service life.
FIGURE 5.

FIGURE 4

Suggested applications:

Removing synthetic coatings, thermoplastic and cold
plastic marking and lines from concrete and asphaltic
surfaces.

COST 10
PRODUCTIVITY 7
SERVICE LIFE 7

Milling flails are designed to remove a variety of
traffic line materials from concrete and asphaltic type
surfaces. With proper techniques, minimal amounts
of parent work surface material will also be removed
during the planing process. Milling flails are expensive.

FIGURE 5

The function of spacer washers:

1) Reduce the number of flails required to be mounted on
the flail drum, thus reducing purchase and operational
costs.

2) Arrange the flails in a sequence or pattern that
minimizes “blind” or “open” spots created by the
additional support plates of the two section flail drum.
Always insert at least one spacer washer between
two (2) consecutive flails. The exception to this rule
is a configuration where its design does not require
the use of spacer washers. A flail drum set up with
only pentagonal flails and no spacer washers will
not penetrate the work surface at satisfactory rates.
Typical configurations minimize the hammering or
impact action of the flails. However, this can also be
useful when removing traffic lines.

3) Allow the flails to be arranged on the one section
flail drum in configurations of specific widths for many
job applications. An example would be the use of
pentagonal flails to groove a concrete floor. The spacer
washers are used to position the pentagonal flails at
the desired width. FIGURE 6.

SP684 SURFACE SHARK SURFACE PLANER PAGE 15

Variances in material thickness and manufacturing
processes can affect the final thickness of both flails
and spacer washers. Because of this occurrence, trial
and error is important for assembling flails and spacer
washers on a flail drum. By mixing and matching
flails and spacer washers of specific thicknesses, the
required number of components can be assembled on
a flail drum in a minimum amount of time.

USE ONLY FACTORY SUPPLIED SPACER
WASHERS ON THE FLAIL DRUM. OTHER WASHER
TYPES AND/OR CONFIGURATIONS CAN PRODUCE
ABNORMAL WEAR AND ELONGATION, RESULTING
IN COMPLETE SEPARATION FROM THE FLAIL
DRUM. SPACER WASHER SEPARATION CAN
RESULT IN PROPERTY LOSS AND/OR PERSONAL
INJURY.

FIGURE 6

FLAIL DRUM RODS

Application: SP684 SURFACE SHARK

FIGURE 7

Problems Encountered by Uneven Component Wear:

1) Inadequate free play exists between the flails/spacer
washers and the support plates of the flail drum. If
the flails and spacer washers do not have complete
freedom of movement, they will not be capable of
properly rotating about the flail drum rod. The result is
rod wear confined to two locations that are usually 180
degrees apart. FIGURE 8. Variances in flail and spacer
washer thicknesses affects free play when assembled
on the drum. Because free play is also created during
the planing process due to actual flail and spacer
washer wear, a certain amount of “tightness” can
sometimes be tolerated without affecting the service
life of the drum rods or flails. The specific amount of
“tightness” can usually be determined through trial and
error. If the flails and spacer washers appear too tight
on the drum, remove an appropriate flail or washer
and reassemble the drum. If a short, operational
test indicates normal component wear patterns, the
apparent problem has been solved. A general rule for
consideration: it is better to have the flails and spacer
washers a “little too loose” on the drum than a “little
too tight”.

Flail drum rods are manufactured from 1/2 inch
diameter alloy steel. They are heat treated in a two
step process that yields a surface hardness that resists
wear and extends service life.

Drum rod service life is difficult to predict because
of the large number of flail configurations and work
surface materials. Normal wear should be uniform
about the rod circumference. FIGURE 7.

PAGE 16 SP684 SURFACE SHARK SURFACE PLANER

FIGURE 8

2) Mixing both worn and new flails on the drum. Proper
flail action against the work surface material requires
that the flails be of the same, approximate dimensions.
Flails with various inside and outside dimensions will
not impact the work surface material with the same
intensity and deliver the same results. Flail rod wear
is directly proportional to the amount of force it must
supply against each, individual flail. When a rod can
no longer supply adequate force against the flails,
it will break, allowing the flails to be hurdled against
the inside of the Surface Planer frame. The more
aggressive flails require greater forces to keep them
contained on the rod. These forces, in turn, create
faster and/or uneven rod wear rates.

THE MINIMUM ALLOWABLE DRUM ROD
DIAMETER IS 3/8 INCH AS MEASURED ALONG
ANY PART OF ITS CIRCUMFERENCE AND/OR
LENGTH. ANY DRUM ROD NOT MEETING THIS
MINIMUM DIMENSION STANDARD SHOULD BE
PROPERLY DISCARDED AND REPLACED WITH
AN APPROVED, FACTORY REPLACEMENT PART
ONLY.

UNDER NO CIRCUMSTANCE IS WELDING AND/OR
ANY OTHER TYPE OF METAL BUILD-UP PROCESS
ALLOWED TO BE PERFORMED ON A WORN DRUM
ROD. TYPICAL MAINTENANCE TECHNIQUES
CAN ALTER THE ORIGINAL HEAT TREATMENT
PROCESS AND COMPROMISE THE STRUCTURAL
INTEGRITY, RESULTING IN PROPERTY DAMAGE
AND/OR PERSONAL INJURY.

On occasion, it may be necessary to remove severely
worn drum rods from the flail drum by the use of a band
saw or similar device. FIGURE 9. Proper preventative
maintenance and operational procedures will minimize
these occurrences.

Because flail drum rods are a critical component of the
actual planing process, it is important that each rod
be inspected on a regular basis to determine proper
structural integrity.

INSPECT EACH FLAIL DRUM ROD ON A
REGULAR INTERVAL TO DETERMINE PROPER
STRUCTURAL INTEGRITY. USAGE RATES
AND OTHER OPERATING PARAMETERS WILL
DETERMINE PROPER INTERVAL RATES. IF
THERE IS ANY QUESTION REGARDING THE
VISUAL STRUCTURAL INTEGRITY OF A DRUM
ROD, PROPERLY DISCARD AND REPLACE IT
WITH AN APPROVED, FACTORY REPLACEMENT
PART ONLY.

FIGURE 9

SP684 SURFACE SHARK SURFACE PLANER PAGE 17

Utilize proper personal protection devices and
exercise caution when attempting this procedure.
Secure/stabilize the drum on a solid surface to
prevent accidental rotation.

FLAIL DRUM DESIGN AND APPLICATION

Application: SP684 SURFACE SHARK

Flail drums are manufactured from alloy steel and heat
treated to extend the service life. Drums are classified
by the number of sections between the side plates.

FIGURE 10

The one section flail drum incorporates the four flail
rods supported only by the end plates. FIGURE 10.
To provide additional stability and structural rigidity
for the drum rods, four support straps are included as
a standard accessory. These support straps can be
installed about the flails in lieu of the standard spacer
washers. FIGURE 11. Additional support straps can
also be assembled as required to provide for additional
rigidity for the drum rods.

FIGURE 11

Never operate the one section drum without the
use of a proper quantity of support straps to
provide for additional stability and structural
integrity. Property damage and/or personal injury
can result.

The added flexibility of the one section flail drum can be
especially useful on many, specialized job applications.
These job applications are usually limited to grooving,
or light scabbling and scarifying applications. Example:
grooving concrete floors to minimize the chance
of animals and humans from falling and sustaining
injuries. This end result can be readily accomplished
by the correct spacing of flails, spacer washers and
support straps on a one section drum. FIGURE 12.

FIGURE 12

PAGE 18 SP684 SURFACE SHARK SURFACE PLANER