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

The most widely used drum is of the two section
design. FIGURE 13. It incorporates two half sectioned
side plates that are positioned on the center shaft to
facilitate optimum flail spacing. The half side plate
sections also provide additional stability and structural
rigidity for the drum rods. The two section drum can
accommodate the use of all flail designs while meeting
the most demanding job applications.

4) Regularly inspect the drum for excessive wear and
signs of fatigue. Random vibration caused by the
planing process is difficult, if not impossible, to fully
predict. Component service life is impossible to predict.
Work surface materials, operator techniques and
general maintenance are also contributing factors that
will limit the service life of the drum and/or components.
If there is any question regarding the structural integrity
of a drum or any component, properly discard and
replace with factory approved, replacement parts.

5) It is advisable to always have a minimum of
one spare, loaded drum available to increase job
site productivity and reduce down time. Replacing
worn flails is a job that can require from only a few,
short minutes to even hours for extremely worn and
damaged components. Replacing a drum on the
driveshaft can usually be accomplished in a matter
of a few minutes. It is a common practice to replace
worn flails during normal, unproductive time and keep
a number of loaded, replacement drums on the job site
to speed production rates.

FIGURE 13

General Notes Regarding Flail Drums:

1) Flail drum rods are held in position by end caps and
related fasteners. The end caps are heat treated to
extend their service life.

2) The countersunk Allen head capscrews are retained
to the flail drum by both self locking, hexagon head
nuts and lock washers. The lock washers provide
additional redundancy while eliminating open, exposed
threads that can become worn or damaged from field
use. A countersunk Allen head capscrew was chosen
over a conventional hexagon head capscrew to
eliminate anticipated wear. Component wear would
substantially increase the difficulty of disassembling
drum components in the field. Before removing
these capscrews, clean the internal hexagon with an
appropriate tool to help facilitate their removal.

3) Flail rods are not intended to rotate in the drum
assembly while the Surface Planer is in operation.
Severe operation can cause the drum plates to wear
and elongate. Drum rods are also subject to wear and
elongation. If the total amount of wear is not severe,
various types of high strength, anaerobic adhesives
can be utilized to secure the rods to the drum. Severe
component wear is always an immediate reason to
reject either the rods and/or drum and replace with
factory approved, replacement parts.

INSTALLING FLAILS ON THE TWO SECTION

DRUM

All flails are assembled on the two section drum in
sequence patterns with the spacer washers. Spacer
washers provide for an overlapping effect of the flails
that produces consistent material removal from the
work surface.

Normal Installation Procedure (fine finish) for all
1/8 Inch Nominal Thickness Flails:

1) Install a flail next to the outside side plate of the
narrow section. Next, install a spacer washer. Follow
with a flail and continue the sequence until the section
is full. FIGURE 14.

SP684 SURFACE SHARK SURFACE PLANER PAGE 19

FIGURE 14

FIGURE 16

2) Install a spacer washer next to the outside side plate
of the wide section. Next, install a flail. Follow with a
spacer washer and continue the sequence until the
section is full. FIGURE 15.

FIGURE 15

Normal Installation Procedure (fine finish) for
Pentagonal Flails:

1) Install a spacer washer next to the outside side plate
of the narrow section. Next, install a flail. Follow with
a spacer washer and continue the sequence until the
section is full. FIGURE 16.

2) Install a flail next to the outside side plate of the wide
section. Next, install a spacer washer. Follow with a
flail and continue the sequence until the section is full.
FIGURE 17.

FIGURE 17

Normal Installation Procedure for Milling Flails:

1) Install three spacer washers next to the outside side
plate of the narrow section. Next, install a flail. Follow
with two spacer washers and continue the sequence
until the section is full. The tungsten carbide inserts
must be installed to form a continuous planing surface.
FIGURE 18.

PAGE 20 SP684 SURFACE SHARK SURFACE PLANER

FIGURE 18

2) Install a flail next to the outside side plate of the wide
section. Next, install two spacer washers. Follow with a
flail and two spacer washers. Install another milling flail
followed by three spacer washers. Finally, install the
remaining flail and one spacer washer. The tungsten
carbide inserts must be installed to form the same,
continuous planing surface as in Step 1. FIGURE 19.

3) Milling flails can also be installed on the drum
without the use of spacer washers.

General Notes Regarding the Installation of Flails:

1) Because of variance in material thicknesses and
manufacturing tolerances, the specified number of
spacer washers may not always fit within the narrow
and wide sections. If this occurs, grinding a spacer
washer to reduce its thickness is an option.

Exercise caution when grinding a spacer washer to
reduce its thickness. Wear safety eye wear and other,
appropriate safety apparel to minimize the potential for
personal injury.

2) Flails require sufficient free play to allow them to
properly impact the work surface material. If the flails
fit too tight on the drum, inconsistent material removal
and accelerated flail wear will result. The formation of
rust between the flail and spacer washer surfaces will
affect proper free play. Excessive free play can also
accelerate the wear of flails and rods. As a general
rule, flails should be free to rotate by hand after
being installed on the drum. If this is not possible,
the flails should be disassembled and additional free
play provided by reducing the thickness of a spacer
washer.

3) All flails are bi-directional in design with the exception
of the milling flail. That is, there is no forward or reverse
orientation on the drum. Fail service life can sometimes
be extended by reversing their orientation on the
driveshaft. The effect is similar to rotating tires on an
automobile.

4) As the name implies, the tungsten carbide inserts
of the milling flail cut the work surface material with an
action very similar to that of a machine tool cutting steel.
The brittleness of the tungsten carbide insert requires
that it be fully supported to minimize breakage. This
requires a substantial flail body to provide the necessary
support. The resulting configuration makes the milling
flail one directional in design. This limitation requires
the operator to install a loaded drum on the driveshaft
with the tungsten carbide inserts facing the direction
of rotation. FIGURE 20. If the tungsten carbide inserts
face opposite to the direction of rotation, improper
milling action and accelerated flail wear will occur.

FIGURE 19

FIGURE 20

SP684 SURFACE SHARK SURFACE PLANER PAGE 21

Before installing the drum on the driveshaft, make
a close, visual inspection of the entire assembly.
Determine that all flails and spacer washers are
properly secured on the rods and that no loose flail
or spacer washer has slipped its position during
assembly. Flails and spacer washers can fall off
the rods during assembly and become dislodged
and unnoticed. When the loaded drum begins
rotating at high speeds, these components can
fly off the drum causing property damage and/or
personal injury.

INSTALLING A LOADED DRUM ON THE

DRIVESHAFT

Application: SP684 SURFACE SHARK

Tools required:

1 each, 3/4 inch wrench or equivalent
1 each, torque wrench, 85 ft lbs (115 Nm) capacity
with 3/4 inch socket

8) Install the four 1/2 inch diameter x 1 inch long
capscrews and washers. Capscrews should install with
a minimal amount of resistance and related, alignment
problems. Torque the capscrews to 85 ft lbs (115
N.m). No lockwashers or similar devices are required.

9) If the Surface Planer is powered by an engine,
reconnect the engine spark plug wire. If powered
by an electric motor and the machine is to be used
immediately, reconnect the extension cord or Surface
Planer to the power source. Determine that the ON/
OFF switch located on the operator handle is in the
OFF position.

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

10) Removing a loaded drum from the driveshaft is
accomplished by reversing the above steps.

1) If the Surface Planer is powered by an engine,
disconnect the spark plug wire. If powered by an
electric motor, properly disconnect the extension cord
or Surface Planer from the power source.

2) Rotate the height adjustment lever located on the
operator handle counterclockwise to raise the Surface
Planer to its maximum height position above the work
surface.

3) Using the wrench, remove the four (4) 1/2 inch
diameter x 1 inch long capscrews and flat washers
securing the drum access plate to the main frame.

4) Remove the drum access plate from the driveshaft.

5) Clean and remove any excessive material build-up
from the threaded bosses and surrounding areas.

6) Install the loaded flail drum on the driveshaft. If
utilizing the milling flails or other flail configurations that
are unidirectional, determine that the flails are facing
the direction of rotation. FIGURE 21.

7) Install the drum access plate on the driveshaft. The
left, vertical side of the access plate should align tight
against the main frame.

FIGURE 21

TRANSPORTING THE SURFACE PLANER

Application: SP684 SURFACE SHARK

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

PAGE 22 SP684 SURFACE SHARK SURFACE PLANER

STARTING THE SURFACE PLANER ON THE JOB

SITE

DO NOT ATTEMPT TO LIFT THE SURFACE PLANER
UP INTO A TRANSPORTATION VEHICLE WITH THE
USE OF ONE PERSON ALONE. DO NOT ATTEMPT
TO LOWER THE SURFACE PLANER FROM A
TRANSPORTATION VEHICLE WITH THE USE OF
ONE PERSON ALONE. LIFT AND/OR LOWER THE
SURFACE PLANER 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.

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 Surface Planer. A lifting handle
is provided on the front of the main frame. This handle
can be utilized by personnel whenever lifting/lowering
the Surface Planer.

EXERCISE EXTREME CAUTION WHEN UTILIZING
A MECHANICAL DEVICE FOR LIFTING THE
SURFACE PLANER. 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
UNDERSTOOD BY ALL APPLICABLE PERSONNEL.
FAILURE TO PROPERLY UTILIZE THE MECHANICAL
DEVICE CAN RESULT IN PROPERTY DAMAGE
AND/OR PERSONAL INJURY.

2) When transporting the Surface Planer on a
motor vehicle, the fuel tank breather vent (if so
equipped) must be completely closed to eliminate the
accidental seepage of fuel and resulting potential fire
and environmental hazards. In order to minimize the
possibility of damage to the Surface Planer, 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. Consult applicable OSHA, AGA, CGA, etc.
regulations for the proper transportation of gasoline
and other, flammable gases.

Application: SP684 SURFACE SHARK

1) Position the Surface Planer on a flat and level
surface of firm foundation.

2) Rotate the height adjustment lever counterclockwise
to raise the Surface Planer to its maximum position
above the work surface. This will insure proper
clearance between the loaded drum and the work
surface.

3) Pull the Quik-Pitch lever back to its stop. This will
help raise the Surface Planer to its maximum position
above the work surface. This will help insure proper
clearance between the loaded drum and the work
surface. FIGURE 22.

FIGURE 22

DO NOT ATTEMPT TO START THE ENGINE
WITHOUT FIRST DETERMINING THAT THE LOADED
DRUM IS NOT IN CONTACT WITH THE WORK
SURFACE. IF THE ROTATING FLAILS COME IN
CONTACT WITH THE WORK SURFACE BEFORE
THE OPERATOR HAS ASSUMED FULL CONTROL,
THE ACTION HAS THE POTENTIAL TO PULL THE
SURFACE PLANER AWAY. A RUNAWAY SURFACE
PLANER CAN CAUSE PROPERTY DAMAGE AND/
OR PERSONAL INJURY.

SP684 SURFACE SHARK SURFACE PLANER PAGE 23

4) Refer to the material supplied by the engine
manufacturer for the correct starting, operation and
stopping procedures.

5) The SP684 gasoline powered Surface Planer is
not equipped with a centrifugal clutch assembly. The
gasoline engine is directly coupled to the driveshaft by
a V-belt reduction.

AS SOON AS THE ENGINE STARTS, THE
OPERATOR MUST BE IN A POSITION TO ASSUME
DIRECT AND FULL CONTROL OF THE SURFACE
PLANER. FAILURE TO ASSUME DIRECT AND
FULL CONTROL CAN RESULT IN PROPERTY
DAMAGE AND/OR PERSONAL INJURY.

6) Allow the engine to properly “warm up” and operate
without the requirement for choking. Check for
excessive machine noise and/or vibration.

DO NOT OPERATE A GASOLINE ENGINE
IN CLOSED SPACES WITHOUT PROPER
VENTILATION. GASOLINE ENGINES PRODUCE
CARBON MONOXIDE FUMES. BREATHING
CARBON MONOXIDE FUMES CAN RESULT IN
PROPERTY DAMAGE AND/OR PERSONAL INJURY.
EXCESSIVE LEVELS OF CARBON MONOXIDE CAN
CAUSE DEATH.

7) Stop the engine in accordance with the instructions
as described in the material supplied by the engine
manufacturer.

If the Surface Planer and/or an individual component/
accessory does not appear to be functioning properly,
STOP and do not further operate the Surface Planer
until the proper corrective action has been completed. If
there are any questions regarding the proper operation
of the Surface Planer, contact the Customer Service
Department BEFORE further utilization. There is no
charge for this service.

OPERATING THE SURFACE PLANER ON THE

JOB SITE

Application: SP684 SURFACE SHARK

THE PLANING PROCESS PRODUCES EXCESSIVE
NOISE, VIBRATION AND FLYING DEBRIS. ALL
OPERATORS AND WORK PERSONNEL IN THE
VICINITY OF THE SURFACE PLANER 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 SURFACE PLANER 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.

DO NOT OPERATE A GASOLINE ENGINE
IN CLOSED SPACES WITHOUT PROPER
VENTILATION. GASOLINE ENGINES PRODUCE
CARBON MONOXIDE FUMES. BREATHING
CARBON MONOXIDE FUMES CAN RESULT IN
PROPERTY DAMAGE AND/OR PERSONAL INJURY.
EXCESSIVE LEVELS OF CARBON MONOXIDE CAN
CAUSE DEATH.

1) Push the Quik-Pitch lever forward to its stop. This
action will allow the height adjustment lever system to
travel over center and lock itself into position. A worn
Quik-Pitch system will not allow the lever to travel over
center and properly lock. FIGURE 23.

PAGE 24 SP684 SURFACE SHARK SURFACE PLANER

2) Flail cutting depth is controlled by the height
adjustment lever . Rotate the lever counterclockwise
to raise the flail drum off the work surface. Rotate
the lever clockwise to lower the flail drum to the work
surface. The height adjustment lever can be locked
in position by dropping the connecting capscrew head
through one of the two holes provided. Each complete
turn will raise or lower the flail drum approximately
1/16 inch (1.6 mm). Using the height adjustment lever,
lower the flail drum into the work surface to the desired
depth.

3) Proper operator position will enhance operational
safety and overall productivity. FIGURE 24. Operate
the engine at maximum, governed speed. Consult the
material supplied by the engine manufacturer and the
Specifications section for specific information.

FIGURE 24

a) Work surface material yield and tensile value. As
a general rule, these values will determine the cutting
depth achieved in one pass. Materials with high yield
and tensile values will characteristically resist/limit
flail penetration. For such materials, the accepted
procedure is to make a number of shallow 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 flail
service life.

FIGURE 23

4) 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 Surface
Planer. Use of the Surface Planer will require constant
trial and error testing until satisfactory results are
achieved. Experience gained over time and common
sense will help to 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:

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 planing
misaligned sidewalks and joints.

c) Job specifications may require a wide variety of
work surface finishes and textures. The smoothest
surface texture available from the Surface Planer is
very similar to a “broom” type finish. If a smoother
finish and texture is required to meet specifications, a
grinding finish must be specified. This process utilizes
a different process and can not be achieved with the
Surface Planer.

5) The Surface Planer features a “down feed” type
design for the flail drum. The flail drum rotates forward
and towards the front of the machine before the
flails impact the work surface and remove material.
The rotational direction of the drum produces a
“self-propelled” effect that assists the operator when
pushing the machine forward. Conversely, when the
operator pulls the machine back towards himself, he
must exert an additional force to overcome the “self­propelling” force.

SP684 SURFACE SHARK SURFACE PLANER PAGE 25

ALWAYS MAINTAIN PROPER CONTROL OF THE
SURFACE PLANER. IF AN OPERATOR LOOSES
CONTROL OF THE MACHINE, A “RUNAWAY”
SURFACE PLANER CAN RESULT IN PROPERTY
DAMAGE AND/OR PERSONAL INJURY. BECAUSE
OF THE UNIQUE OPERATING CHARACTERISTICS
OF THE SURFACE PLANER, THERE IS NO
PROVISION FOR THE ELECTRIC MOTOR/ENGINE
TO AUTOMATICALLY STOP IF THE OPERATOR
FAILS TO MAINTAIN PROPER CONTROL.

WHEN OPERATING THE SURFACE PLANER ON
ABOVE GROUND 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.

FIGURE 25

7) The maximum cutting depth on a slab surface is 5/8
inch. It is not recommended that the Surface Planer
be utilized to achieve depths greater than this value.
In most operating configurations, the normal planing
depth per single pass will vary between 1/16 to 1/8
inch deep depending upon the work surface material
type and flail type and/or configuration. This planing
depth range will usually maximize productivity rates
and component service life.

6) Beam and pentagonal flail are bi-directional in
design and can be operated in both forward and
reverse directions. Milling flails are one directional in
design. This limitation requires the operator to install
a loaded drum on the driveshaft with the tungsten
carbide inserts facing the direction of rotation. FIGURE

25. Remove work surface material only by pulling the
Surface Planer towards the operator after the drum has
been lowered to the desired cutting depth. Never push
the Surface Planer forward when the milling flails are
in contact with the work surface material.

This technique will allow the following to occur:

a) The milling flail “hammers” rather then “cuts” the
material, producing ineffective results and substantial
lower productivity.

b) Flail body material is subject to accelerated wear,
especially in the area supporting the tungsten carbide
insert. As this area wears, the insert becomes chipped
and can “break off” from the flail body, thus significantly
reducing its efficiency and useful service life.

8) For normal job applications, operate the engine at a
maximum, governed speed of 3450 RPM. Consult the
material supplied by the engine manufacturer and the
Specifications section for specific information.

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

SPARKS PRODUCED BY THE ACTIONS OF
THE FLAILS IMPACTING AGAINST THE WORK
SURFACE (FOR EXAMPLE: STRIKING ANCHOR
BOLTS) DURING THE PLANING PROCESS 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.

PAGE 26 SP684 SURFACE SHARK SURFACE PLANER

FOR SUCH OPERATING CONDITIONS, ALWAYS
WEAR A NIOSH/MSHA APPROVED DUST/MIST
RESPIRATOR. CONSULT APPLICABLE OSHA
REGULATIONS FOR SPECIFIC INFORMATION.

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

a) The Surface Planer is equipped with a 3 inch outside
diameter vacuum tube adapter located at the front of
the machine. An industrial type vacuum cleaner can be
attached to the Surface Planer to remove/control dust
and other particle contamination from the work surface.
A plastic cover is provided for the 3 inch diameter
adapter. Insert a vacuum hose over the tube. A hose
clamp is sometimes required to properly secure the
vacuum hose to the tube. FIGURE 26.

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 ELECTRICAL 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.

FIGURE 26

b) The Surface Planer is equipped with a 1/4 inch NPT
water mist dust control fitting on the main frame. This
fitting is provided to allow the installation of a valve
and standard garden hose. Water can be regulated by
the valve to minimize dust problems when a vacuum
is not available or its use not desired. As a general
rule, a small volume of water is required. It is not
necessary to flood the work surface material. An added
benefit is that the water can reduce the amount of heat
generated by the planing process and significantly add
to flail and bearing service life. FIGURE 27.

WATER USED IN THIS PROCEDURE CAN ACT AS
A CONDUCTOR OF ELECTRICITY. USE OF ALL
ELECTRICALLY POWERED EQUIPMENT BEING
OPERATED ON AND/OR AROUND THE VICINITY
OF THE WET WORK SURFACE INCREASES THE
POTENTIAL FOR ELECTROCUTION. CONSULT
CURRENT NATIONAL ELECTRICAL CODES
AND OSHA REGULATIONS FOR SPECIFIC
INFORMATION.

SP684 SURFACE SHARK SURFACE PLANER PAGE 27

FIGURE 27

When utilizing water to control dust and other particle
contamination, thoroughly clean the interior surfaces
of the Surface Planer to remove any material build-up.
Failure to properly clean the interior surfaces can result
in dried material build-up affecting operation and/or
bearing service life.

c) Many oil based materials such as asphalt can quickly
accumulate on components and severely restrict
the ability of the flails to remove material from the
work surface. Kerosene and other types of oil based
solvents can be utilized to remove the accumulated
material(s).

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

11) Another side benefit of progressive housekeeping
is increased V-belt life. The belt guard incorporates a
bumper that is designed to push excess material away
from the bottom sheave and minimize the amount of
loose material that is picked up by the V-belt. Loose
surface material can be extremely abrasive. A V-belt
operating in these materials is subject to accelerated
wear and premature failure.

12) To raise the loaded drum from the work surface,
pull the Quik-Pitch lever back to its stop. This will allow
the operator to reposition or maneuver the Surface
Planer about the jobsite. Pushing the Quik-Pitch lever
forward to its stop will lower the loaded drum to the
same depth level.

STOPPING THE SURFACE PLANER

Application: SP684 SURFACE SHARK

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
APPROPRIATE SAFETY APPAREL.

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.

1) Push the Quik-Pitch lever forward to its stop.

2) Rotate the height adjustment lever located on the
operator handle counterclockwise to raise the Surface
Planer to its maximum height above the work surface.

3) Stop the engine in accordance with the instructions
as described in the material supplied by the engine
manufacturer.

SERVICE

PREVENTATIVE MAINTENANCE CHECK LIST

Application: SP684 SURFACE SHARK

The normal operation of the Surface Planer produces
extreme dirt and dust, along with high levels of random
vibration. Before operating the Surface Planer, the
following service list should be accomplished. This list
is for reference only and is not intended to be all

PAGE 28 SP684 SURFACE SHARK SURFACE PLANER

inclusive. Other subject areas can be added at the
discretion of the owner(s) and/or operator(s):

1) 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.

2) 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
the operating processes can be extremely abrasive.

3) Keep the Surface Planer clean. Wash the unit after
each use. Keep loose material from accumulating
around engine cooling fins. 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 Surface Planer after
each use.

4) Engine service life can be extended with proper air
cleaner maintenance. Consult the material supplied by
the engine manufacturer for specific information.

5) Check for proper engine oil level. Always use clean,
high quality engine oil. Change oil as required. Consult
the material supplied by the engine manufacturer for
specific information.

CHECKING V-BELT TENSION AND ALIGNMENT

Application: SP684 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 tension force. Check the
belt tension at least two times during the first day of
operation, as there will normally be a rapid decrease
in belt tension until the belt has 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 the belt will not slip under peak load
conditions.

Tools Required:

1 each, 9/16 inch wrench
1 each, 16 inch minimum length straightedge
1 each, 10 lbs minimum capacity, tension scale or
belt tension tool

1) If the Surface Planer is powered by an engine,
disconnect the spark plug wire. If powered by an
electric motor, disconnect the extension cord or Surface
Planer from the power source.

2) Position the Surface Planer on a suitable work
bench with the V-belt approximately at waist level.

DO NOT PERFORM PREVENTATIVE
MAINTENANCE CHECKS WITH THE ENGINE OR
ELECTRIC MOTOR RUNNING. STOP THE POWER
SOURCE AND DISCONNECT THE SPARK PLUG
OR EXTENSION CORD BEFORE PERFORMING
ANY MAINTENANCE TO THE SURFACE PLANER.
RECONNECT THE SPARK PLUG BEFORE
RESTARTING THE ENGINE. IF ELECTRIC MOTOR
EQUIPPED, TURN THE ON/OFF SWITCH TO THE
OFF POSITION BEFORE RECONNECTING THE
EXTENSION CORD. IMPROPER PROCEDURES
CAN RESULT IN PROPERTY DAMAGE AND/OR
PERSONAL INJURY.

3) Using the 9/16 inch wrench, remove the belt guard
from the main frame. Clean the inside of the belt guard
with an appropriate solvent. Check for signs of wear
and damage.

Observe all applicable safety precautions for the
solvent.

4) Check belt tension using the spring scale or
belt tension tool midway between the engine and
driveshaft pulleys. Belt deflection should measure
approximately 3/16 inch at 3-7/8 to 5-1/2 lbs force.
FIGURE 28. If tension is within specifications, proceed
to Step 5. If tension is not within specifications,
refer to INSTALLING A REPLACEMENT V-BELT
OR PULLEY for specific information.

SP684 SURFACE SHARK SURFACE PLANER PAGE 29

FIGURE 28

FIGURE 29

5) Belt alignment is checked with the straightedge.
Place the straightedge squarely against the driveshaft
pulley. Properly aligned pulleys should also place
the straightedge squarely against the engine pulley,
FIGURE 29. Remove the straightedge and rotate the
engine pulley 120 degrees. Recheck alignment with
the straightedge. Repeat the process until the engine
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.

6) Install the belt guard to the main frame. Install the
flat washers and self-locking hexagon nuts. Torque
the nuts to 35 ft lbs (47 N.m). Determine that all
safety related decals affixed to the belt guard are fully
readable. If any decal is not fully readable, replace with
a factory approved, replacement part only.

7) If the Surface Planer is powered by an engine,
reconnect the engine spark plug wire. If powered
by an electric motor and the machine is to be used
immediately, reconnect the extension cord or Surface
Planer to the power source. Determine that the ON/
OFF switch located on the operator handle is in the
OFF position.

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

INSTALLING A REPLACEMENT V-BELT OR

PULLEY

Application: SP684 SURFACE SHARK

Tools Required:

1 each, 7/16 inch wrench
2 each, 1/2 inch wrenches
1 each, 9/16 inch wrench
1 each, 16 inch minimum length straightedge
1 each, 10 lbs minimum capacity, tension scale or
belt tension tool
1 each, torque wrench, 35 ft lbs (47 Nm.) capacity
with 7/16 inch and 9/16 inch sockets

Parts Required:

1 each, Part# M3VX335 V-belt (if required)
1 each, Part# MSP8-0221 bushing (if required)
1 each, Part# MSP8-0280 bushing (if required)
1 each, Part# MSP8-0360 bushing (if required)
1 each, Part# MSP8-0270 sheave (if required)
1 each, Part# MSP8-0201 sheave (if required)
1 each, Part# MSP8-0211 key (if required)

1) If the Surface Planer is powered by an engine,
disconnect the spark plug wire. If powered by an electric
motor, disconnect the extension cord or Surface Planer
from the power source.

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

3) Using the 9/16 inch wrench, remove the belt guard
from the main frame. Clean the inside of the belt guard
with an appropriate solvent. Check for signs of wear
and damage.

PAGE 30 SP684 SURFACE SHARK SURFACE PLANER

Alternately tighten the take-up cap screws until slight
tension is applied to the V-belt.

Observe all applicable safety precautions for the
solvent.

3) Using a 1/2 inch wrench, remove the self locking
nuts on the engine/electric motor take-up cap screws.
Rotate the take-up capscrews until the hexagon head
contacts the threaded mounting plate.

4) Using the 1/2 inch wrenches, loosen the engine/
electric motor attachment cap screws, and slide the
engine/electric motor toward the front of the main
frame. FIGURE 30.

7) The driveshaft pulley should be positioned within
1/16 inch if the shaft shoulder. If the distance exceeds
this limit, proceed as follows:

a) Using the 7/16 inch wrench, remove the two 1/4 inch
diameter cap screws from the bushing.

b) Insert the cap screws into the tapped holes in the
bushing flange. Tighten progressively until the bushing
disengages from the pulley.

c) Insert the 1/4 inch diameter cap screws into the
tapped holes in the pulley. Tighten progressively until
the bushing applies tension to the pulley. FIGURE 31.

FIGURE 30

5) Remove the worn belt and install the replacement
V-belt, Part# M3VX335.

a) Do not install a replacement belt if the pulleys
have worn grooves. Such pulleys should be replaced
to insure proper belt fit. Operating the V-belt in
worn pulley grooves will accelerate V-belt wear and
significantly reduce its service life.

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

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

6) Reinstall the engine/electric motor take-up cap
screws with the heads facing toward and in contact
with the engine crankcase/electric motor thrust plate.
Tighten the engine/electric motor attachment cap
screws until they just begin to apply tension to the
engine/electric motor. DO NOT OVER TIGHTEN.

FIGURE 31

d) Tap the pulley/bushing assembly against the shaft
shoulder with the soft hammer.

e) Tighten the 1/4 inch diameter cap screws
progressively with a torque wrench to 95 inch pounds.

Note: this installation procedure is also used when
installing replacement pulleys.

8) Belt alignment is checked with the straightedge.
Place the straightedge squarely against the driveshaft
pulley. Properly aligned pulleys should also place
the straightedge squarely against the engine/electric
motor pulley. Remove the straightedge and rotate the
engine pulley 120 degrees. Recheck the alignment
with the straightedge. Repeat the process until the
engine/electric motor pulley has been rotated a full 360
degrees. Maximum allowable misalignment is +- 1/32
inch. FIGURE 32.

SP684 SURFACE SHARK SURFACE PLANER PAGE 31

If engine crankshaft/electric motor pulley alignment
needs to be adjusted, proceed as follows:

a) Using the 7/16 inch wrench, remove the two 1/4 inch
diameter cap screws from the engine pulley bushing.

b) Insert the cap screws into the tapped holes in the
bushing flange. Tighten progressively until the bushing
disengages from the pulley.

c) Insert the 1/4 inch diameter cap screws into the
tapped holes in the pulley. Tighten progressively until
the bushing applies tension to the pulley.

d) Using the straightedge for reference alignment
purposes, tap the engine/electric motor pulley/bushing
into proper position.

e) Tighten the 1/4 inch diameter cap screws
progressively with the torque wrench to 95 inch
pounds. FIGURE 33.

d) Recheck V-belt tension and alignment.

10) Install the belt guard to the main frame. Install the
flat washers and self-locking hexagon nuts. Torque
the nuts to 35 ft lbs (47 Nm.). Determine that all
safety related decals affixed to the belt guard are fully
readable. If any decal is not fully readable, replace with
a factory approved, replacement part only.

FIGURE 33

FIGURE 32

f) Recheck alignment as outlined per the beginning of
Step 8.

9) Apply increased belt tension by progressively
tightening the take-up cap screws against the engine
crankcase/electric motor thrust plate.

a) Recheck V-belt alignment.

b) Check belt tension with the spring scale or belt
tension tool midway between the engine/electric motor
and driveshaft pulleys. Belt deflection should measure
approximately 3/16 inch (4.8 mm) at 3-7/8 to 5-1/2
pounds (1.8 to 2.5 kg) force. FIGURE 34.

c) If belt tension and alignment is within specifications,
torque the engine/electric motor attachment cap screws
to 20 ft lbs (27 Nm.)

FIGURE 34

11) If the Surface Planer is powered by an engine,
reconnect the engine spark plug wire. If powered
by an electric motor and the machine is to be used
immediately, reconnect the extension cord or Surface
Planer to the power source. Determine that the ON/
OFF switch located on the operator handle is in the
OFF position.

PAGE 32 SP684 SURFACE SHARK SURFACE PLANER

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

INSTALLING A REPLACEMENT BEARING ON THE

V-BELT SIDE

Application: SP684 SURFACE SHARK

Tools Required:

1 each, 7/16 inch wrench
1 each, 9/16 inch wrench
1 each, racket, suitable extension and 9/16 inch
socket
1 each, torque wrench, 35 ft lbs (47 Nm.) capacity
with 9/16 inch socket
1 each, 5/16 inch Allen wrench
1 each, pliers for large, external-type, snap rings
1 each, 1-7/8 inch diameter steel shaft of appropriate
length
1 each, 2-1/16 inch outside diameter x 1-5/8 inch
inside diameter x 2-1/4 inch long sleeve
1 each, shop press
Various support blocking as required.

Parts Required:

4) Remove the V-belt and driveshaft pulley. Refer
to INSTALLING A REPLACEMENT V-BELT OR
PULLEY for specific information.

5) Using the 5/16 inch Allen wrench and 9/16 inch
wrench, remove the bearing block/driveshaft assembly
from the main frame. For accuracy and alignment
purposes, the main frame incorporates tapped holes to
properly position the cap screws.

6) Position the driveshaft assembly on a suitable work
surface. Use the snap ring pliers to remove the snap
ring. FIGURE 35. Remove the spacer.

Wear safety glasses and other appropriate safety
apparel when removing the snap ring or performing
any work with an arbor press. Caution all onlookers
about the possibility of flying debris and personal
injury.

7) Position the driveshaft assembly in a suitable
arbor press. Determine that the outer race of the
bearing is properly supported. Press the bearing/
driveshaft assembly from the bearing block. FIGURE

36. Reposition the support blocking and press the
bearing from the bearing block utilizing the 1-7/8 inch
diameter steel rod as a punch. FIGURE 37.

1 each, Part# M5208-2RS sealed ball bearing
1 each, container of bearing and shaft locking grade,
anaerobic adhesive/sealant
1 each, Part# M5160-156 snap ring (if required)
1 each, Part# MSP8-0241 driveshaft (if required)

1) Disconnect the spark plug wire from the spark plug.

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

3) Using the racket, extension and 9/16 inch socket,
remove the belt guard from the main frame. Clean the
inside of the belt guard with an appropriate solvent.
Check for signs of wear and damage.

Observe all applicable safety precautions for the
solvent.

FIGURE 35

8) Clean and inspect the driveshaft and housing for
wear and damage. If any damage is evident, replace
the applicable component.

9) Clean the outside bore diameter of the replacement
bearing. Apply a suitable amount of anaerobic

SP684 SURFACE SHARK SURFACE PLANER PAGE 33

adhesive/sealant to the outside diameter of the
bearing. Using the same support blocking, press the
replacement bearing into the bearing housing until it
seats itself against the flange. FIGURE 38.

FIGURE 36

Wear safety glasses and other appropriate safety
apparel when removing the snap ring or performing
any work with an arbor press. Caution all onlookers
about the possibility of flying debris and personal
injury.

FIGURE 38

FIGURE 37

10) Position the bearing block on the arbor press with
the exposed side of the bearing facing up. Support the
inner race of the bearing by centering the 2-1/16 inch
outside diameter sleeve. This will properly absorb the
thrust against the inner race created by pressing the
driveshaft into the bearing. FIGURE 39.

11) Clean the bearing journal area of the driveshaft
with a suitable solvent. Apply a suitable amount of
anaerobic adhesive/sealant to the bearing journal area
of the driveshaft. Press the driveshaft into the bearing
housing until it seats against the bearing. FIGURE 40.

12) Reinstall the snap ring on the driveshaft.

FIGURE 39

PAGE 34 SP684 SURFACE SHARK SURFACE PLANER

FIGURE 40

A properly installed, replacement bearing should rotate
without excessive friction, drag and/or “rough spots”. If
these symptoms occur after assembly, the bearing was
improperly supported when pressed on the driveshaft
or into the housing. The resulting thrust placed upon
the bearing exceeded its static capacity. A bearing
operating with these characteristics will deliver minimal
service life and be prone to premature failure.

13) Reinstall the bearing block/bearing and driveshaft
assembly to the main frame.

14) Follow the procedures as outlined in this manual
for the proper installation of the pulleys and V-belt
assemblies.

15) Reinstall the belt guard to the main frame.

16) Reconnect the spark plug wire to the spark plug.

INSTALLING A REPLACEMENT BEARING ON THE

OUTBOARD SIDE

Application: SP684 SURFACE SHARK

Tools Required:

1 each, 3/4 inch wrench
1 each, 5/16 inch Allen wrench
1 each, plastic hammer
1 each, arbor press
1 each, torque wrench, 85 ft lbs (115 Nm.) capacity,
with 5/16 inch, male Allen head and 9/16
inch socket
1 each, 2-1/16 inch outside diameter x 1-5/8 inch
inside diameter x 2-1/4 inch long sleeve
1 each, pliers for large, external type snap rings

Parts Required:

1 each, Part# M5208-2RS bearing
1 each, Part# M5160-156 snap ring (if required)

1) Disconnect the sparkplug wire from the spark plug.

2) Position the Surface Planer on a suitable work
surface with the V-belt approximately at waist height.

3) Using the 3/4 inch wrench, remove the access plate
cap screws. Remove the access plate. Use the plastic
hammer as necessary.

4) Using the 5/16 inch Allen wrench and 9/16 inch
wrench, remove the bearing block from the access
plate. For accuracy and alignment purposes, the
access plate incorporates tapped holes to properly
position the cap screws.

5) Position the bearing block on a suitable work

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

surface. A common shop vise can also be utilized.
Remove the snap ring that retains the bushing in the
bearing bore. FIGURE 41.

6) Position the bearing block on the arbor press with the
exposed side of the bearing facing down. Determine
that the bearing block is properly supported. Using the
arbor press and an appropriate sized thrust bushing,
remove the internal hexagon bushing and bearing from
the housing. FIGURE 42.

SP684 SURFACE SHARK SURFACE PLANER PAGE 35

FIGURE 41

FIGURE 43

FIGURE 42

7) Position the internal hexagon bushing and bearing in
the arbor press with the snap ring side of the bushing
facing up. Determine that the bearing is properly
supported. Using the arbor press and an appropriate
sized thrust bushing, remove the internal hexagon
bushing from the bearing. FIGURE 43.

8) Clean and inspect the internal hexagon bushing for
damage and excessive wear. Replace the bushing if
required.

9) Clean the inside bore diameter of the bearing block
and inspect for damage.

10) Clean the outside diameter of the replacement
bearing. Apply a suitable amount of anaerobic adhesive/
sealant to the outside diameter of the bearing. Align
the replacement bearing against the bearing housing.
Using the supports, press the bearing into the housing
until it seats itself against the flange, FIGURE 44.

FIGURE 44

11) Position the bearing block with the exposed side
of the bearing facing down. Determine that the bearing
block and replacement bearing are both properly
supported. Using the arbor press, align and press the
internal hexagon bushing into the bearing block until it
seats itself against the flange, FIGURE 45.

12) Reinstall the snap ring on the internal hexagon
bushing.

PAGE 36 SP684 SURFACE SHARK SURFACE PLANER

Wear safety glasses and other appropriate
apparel when removing/installing the snap ring or
performing any work with an arbor press. Caution
all onlookers about the possibility of flying debris
and personal injury.

FIGURE 45

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

LUBRICATION REQUIREMENTS

Application: SP684 SURFACE SHARK

Parts Required:

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, powered materials described and 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.

13) Mount the bearing block to the access plate.
Tighten the 3/8 inch self locking hexagon nuts with the
torque wrench to 35 ft lbs (47 Nm.).

14) Install the access plate to the main frame by
aligning the dowel pins and installing the cap screws
and washers. Tighten with the 3/4 inch wrench.

A properly installed replacement bearing should rotate
without excessive friction, drag and/or “rough spots”. If
these symptoms occur after assembly, the bearing was
improperly supported when pressed into the bearing
block. The resulting thrust placed upon the bearing
exceeded its static capacity. A bearing operating with
these characteristics will deliver minimal service life
and be prone to premature failure.

15) If the Surface Planer is powered by an engine,
reconnect the engine spark plug wire. If powered
by an electric motor and the machine is to be used
immediately, reconnect the extension cord or Surface
Planer to the power source. Determine that the ON/
OFF switch located on the operator handle is in the
OFF position.

2) The flail drum driveshaft is supported by extra
capacity, double row ball bearings. Both bearings are
of a sealed design and should not require additional
lubrication during their normal service life. The
grease type and amount utilized for the bearings are
intended to provide proper lubrication for the respective
loads and operational speeds. Replacement bearings
should contain approximately 30 percent fill capacity.
Excessive amounts of grease in the bearing cavity can
actually increase friction and resulting heat increases
can also dramatically shorten bearing service life.

3) The hand crank bearing is sealed and should not
require additional lubrication during its normal service
life.

4) 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.

5) Loosen the rubber boot to expose the hand crank
screw threads. Lubricate the threads with dry film
lubricant on a regular, scheduled basis. Clean and
remove all material accumulations around the

SP684 SURFACE SHARK SURFACE PLANER PAGE 37

threaded area before applying the lubricant. Do not
lubricate the threads with any type of grease material.
Grease will attract foreign material accumulations that
can accelerate component wear. Place the rubber boot
in its original location and tighten the retaining clamp.

Do not operate the Surface Planer without the protective
rubber boot in its intended location. Operation without
the rubber boot or a boot in an improper position will
accelerate component wear by allowing materials
to accumulate in the screw thread area of the crank
handle.

ALIGNING THE CASTER WHEELS

Application: SP684 SURFACE SHARK

Tools Required:

assembly to the main frame. Install washers as
required. FIGURE 46. The fasteners that attach the front
axle assembly should be tightened until slight tension
is applied. Always position the 1/2 inch flat washers
against the slots provided in the axle assembly.

1 each, 16 inch minimum length straightedge
2 each, 3/4 inch wrenches
1 each, torque wrench, 85 ft lbs (115 Nm.) capacity
with 3/4 inch socket
1 each, 6 inch scale

Proper front and rear caster wheel alignment is essential
to produce an even cutting action by the flails. With
use, caster bearings and axles will eventually wear.
Excessive caster bearing and axle wear can contribute
to an uneven cutting action. In addition, a sharp blow
delivered to the Surface Planer (eg; being dropped to
the surface from off a truck) can also affect the caster
wheel alignment.

Caster wheels are aligned during assembly with
the use of a specially designed alignment jig.
However, satisfactory results can also be achieved
in the field by following steps:

1) Position the Surface Planer on a suitable work
surface. If the Surface Planer is powered by an engine
and the engine is not to be removed, fuel and oil must
be first drained from the fuel tank and crankcase. If
powered by an electric motor, disconnect the extension
cord or Surface Planer from the power source. The
normal position for aligning the caster wheels is with
the main frame perpendicular to the work surface.
Support the unit with proper blocking.

FIGURE 46

3) Position the front casters so that their faces extend
approximately 7/16 inch (11.1 mm) beyond the bottom
surface of the main frame. Caster wheels have a slight
curvature on their faces. The measurement should be
taken at the high point of the curvature, FIGURE 47.

4) Push the rear casters towards the main frame until
the upper limit stop is encountered. FIGURE 48.

FIGURE 47

5) Place the straightedge between the front and rear
casters on the high point of the face curvature. Adjust
the front casters so that the gap between the straight­edge and the bottom of the main frame is identical. This
gap figure is approximately 1/8 to 1/4 inch (3.17 to

2) Shim washers of .015 inch (.381 mm) thickness
are sometimes utilized when fastening the front axle

PAGE 38 SP684 SURFACE SHARK SURFACE PLANER

6.35 mm). It is important that the straightedge be
positioned on both sets of casters in the same relative
position on the caster faces. FIGURE 49.

CHECKING DRIVESHAFT RUN OUT

Application: SP684 SURFACE SHARK

6) Tighten the fasteners with the torque wrench to 85
ft lbs (115 Nm.). The addition of clamps will minimize
any movement or location change while tightening the
fasteners.

FIGURE 48

7) Repeat Step 5 to determine that alignment did not
change while tightening the fasteners. If alignment did
change, repeat Steps 2 thru 6 until satisfactory results
have been achieved.

Tools Required:

1 each, 3/4 inch wrench
1 each, dial indicator and magnetic base

Parts Required:

1 each, Part# MNSP8-0241 driveshaft (if required)

Proper driveshaft run out limits are essential to produce
an even cutting action by the flails. Driveshaft run out
limits are measured with the use of a dial indicator for
accuracy.

1) Position the Surface Planer on a suitable work
surface. If the engine is not to be removed, fuel and
oil must be drained from the fuel tank and crankcase.
The normal position for checking driveshaft run out is
with the main frame perpendicular to the work surface.
Support the unit with proper blocking.

2) Using the 3/4 inch wrench, remove the cap screws
that retain the access door to the main frame.

3) Clean and remove any excessive material build­up from the threaded bosses and surrounding area.
Material build-up can affect the driveshaft run out.

FIGURE 49

4) Remove the flail drum and replace the access
door. Tighten the cap screws with the wrench until the
access door is secured.

5) Install the dial indicator with the magnetic base
attached to the main frame. Driveshaft run out can be
measured by the dial indicator at two locations:

a) Position the dial indicator to measure run out on
the driveshaft flange. Maximum run out (as measured
by the dial indicator gauge) is + - .010 inches (.254
mm). A worn flange surface may not allow an accurate
measurement to be taken. FIGURE 50.

SP684 SURFACE SHARK SURFACE PLANER PAGE 39

FIGURE 50

b) Position the dial indicator to measure run out on
the internal hexagon bushing of the outboard bearing.
Maximum run out (as measured by the dial indicator
gauge) is + - .015 inches (.381 mm). FIGURE 51.

ENGINE SERVICE

Application: SP684 SURFACE SHARK

Consult the material supplied by the engine
manufacturer for specific service and maintenance
information regarding:

1) muffler

2) spark plug

3) air filter system

4) carburetor adjustment

5) ignition system

6) short and long term storage

7) maximum governed engine speed

8) emission standards

Keep this information stored with the Operator Manual
for the Surface Planer so it will always be available for
use when the engine requires service or maintenance.
A properly maintained engine will add considerably to
the service life and overall productivity of the Surface
Planer.

FIGURE 51

6) Run out measurements that exceed these limits
may suggest that the driveshaft is bent. A bent
driveshaft will accelerate bearing wear and failure while
contributing to uneven flail cutting action. Under certain
circumstances, a bent driveshaft can be removed and
straightened in an arbor press. See the SERVICE
section for specific information pertaining to replacing
the driveshaft. If the straightened driveshaft still exceeds
the established run out limits after re-assembly, it must
be replaced with a factory approved, replacement
part.

Because the planing process produces high levels
of random vibration, it is essential that the maximum
governed engine speed be checked at regular,
established intervals. Excessive engine speed can
produce vibration induced forces that can dramatically
affect component service life. Stress related cracking
and resulting failure to mufflers, blower shrouds,
belt guards and other components can result from
excessive engine speed.

TROUBLESHOOTING

ENGINE

Application: SP684 SURFACE SHARK

ENGINE FAILS TO START

Ignition switch in OFF or cut off position. Place switch
in the ON position or move throttle control lever to the
ignition operational position.

Incorrect carburetor/fuel injection system adjustment.
See Service section.

Air filter blocked. See SERVICE section.

Ignition wire to spark plug loose or disconnected.
Re-connect.

Fuel supply exhausted. Refill the fuel tank.

PAGE 40 SP684 SURFACE SHARK SURFACE PLANER

ENGINE LOSES POWER

ACCELERATED V-BELT WEAR

Incorrect carburetor/fuel injection adjustment. See
Service section.

Water in fuel supply. Drain and replace fuel.

Excessive carbon accumulation in combustion
chamber. See Service section.

Fuel tank breather vent closed (if so equipped). Open
vent.

Air filter blocked. See Service section.

ENGINE COMPONENT FAILURE

Cracks develop in the muffler pipe or crankcase
area. Excessive engine speed. Reset maximum
engine governed no load speed to 3450 RPM. See
Specifications section.

OPERATIONAL PROBLEMS

Application: All Models

UNEVEN FLAIL WEAR

Misaligned and/or improperly tensioned pulleys.
Readjust pulleys and V-belt. See Service section.

Worn pulleys. Replace pulleys as required. See

INSTALLING A REPLACEMENT V-BELT OR
PULLEY.

Improper V-Belt. Replace with a Goodyear 3VX335 V-belt
or equivalent. See INSTALLING A REPLACEMENT

V-BELT OR PULLEY.

Bent driveshaft. See CHECKING DRIVESHAFT RUN
OUT.

V-belt rubbing on the work surface. Inspect the belt
guard bumper for wear. Repair or replace the guard as
necessary. Readjust cutting height. Remove excess
loose material from the work surface. See OPERATING

THE SURFACE PLANER ON THE JOB SITE.

ACCELERATED BEARING WEAR AND/OR

FAILURE

Misaligned and/or improperly tensioned pulleys.
Readjust pulleys and V-belt. See Service section.

Excessive cutting depth for the feed/travel rate. Raise
the flail drum and make multiple, shallow passes
instead. Reduce the feed/travel rate. See OPERATING

THE SURFACE PLANER ON THE JOB SITE.

Improper flail and spacer washer setup. See FLAIL
DESIGN AND APPLICATION.

Accumulation of foreign material. Clean and/or replace
the flails and spacer washers as necessary.

Flails and/or spacer washers are too tight on the drum.
Remove and/or replace flails and spacer washers. See

FLAIL DRUM RODS.

EXCESSIVE JUMPING ON THE WORK SURFACE

Excessive cutting depth for the feed/travel rate. Raise
the flail drum and make multiple, shallow passes
instead. Reduce the feed/travel rate. See OPERATING

THE SURFACE PLANER ON THE JOB SITE.

Engine/Flail RPM too low. Reset engine speed. See

OPERATING THE SURFACE PLANER ON THE JOB
SITE.

Bent driveshaft. See CHECKING DRIVESHAFT RUN
OUT.

Improper lubrication. See LUBRICATION
REQUIREMENTS.

UNEVEN CUTTING ACTION

Excessive material build-up on the wheel face surfaces.
Remove the material.

Excessive caster wheel bearing wear. Replace the
caster.

Excessive front or rear axle wear. Replace the
appropriate axle assembly. See ALIGNING THE

FRONT AND REAR CASTER WHEELS.

Front and rear caster wheels are not properly aligned.
See ALIGNING THE FRONT AND REAR CASTER

WHEELS.

Flails and/or spacer washers are too tight on the drum.
Remove and/or replace flails and spacer washers. See

FLAIL DRUM RODS.

Mixing new and worn flails. Remove and replace with
flails of the same, approximate diameter. See FLAIL

DRUM RODS.

SP684 SURFACE SHARK SURFACE PLANER PAGE 41

STORAGE

SPECIFICATIONS

Application: SP684 SURFACE SHARK

Proper procedure for long term storage of the Surface
Planer will protect it against the effects of corrosion
and damage. If the Surface Planer 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
Surface Planer utilizing an appropriate solvent.

Observe all applicable safety precautions for the
solvent.

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

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
Surface Planer at next use.

FRAME

STRUCTURE Unitized, welded steel plate

DRIVE REDUCTION SYSTEM VX335 Belt/Pulley

DRIVESHAFT SIZE AND CONFIGURATION 13/16
inch (21 mm) hexagon

MAXIMUM CUTTING DEPTH 5/8 inch (16 mm)

MAXIMUM CUTTING WIDTH 8 inches (203 mm)

MAXIMUM MACHINE LENGTH 43-1/4 inches
(1099 mm)

MAXIMUM OPERATOR HANDLE HEIGHT 38-3/8
inches (975 mm)

OVERALL MACHINE WIDTH 16-1/8 inches
(410 mm)

CUTTING PROXIMITY TO 3-1/4 inches
(83 mm) without edger attachment

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

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

LATERAL BORDER
VACUUM CLEANER CONNECTION 1-1/2 or 3 inch
(38 or 76 mm) outside diameter.

GENERAL

BASIC WEIGHT 160 lbs (73 kg),

less drum and flails.

MAXIMUM GOVERNED ENGINE 3450 RPM
SPEED FOR 5 HP CATEGORY,
4 CYCLE, GASOLINE ENGINES

PAGE 42 SP684 SURFACE SHARK SURFACE PLANER

Replacement Parts Diagrams

SP684 SURFACE SHARK Surface Planer

SP684 SURFACE SHARK SURFACE PLANER PAGE 43

Main Frame Assembly

SP684 SURFACE SHARK Surface Planer

PAGE 44 SP684 SURFACE SHARK SURFACE PLANER

Main Frame Assembly

SP684 SURFACE SHARK Surface Planer

Reference

Number

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20
21

PART

NUMBER

MSP8-0051

MSG24-0360

MSP8-0061
M15081000
M15081200
M17080000
M53080000
MSP8-0070
M17120000
M22021200
M16040000
M15040600
MSP8-0350
M26040000
MSP8-0040
MSP8-0030
MSP8-0370
M15061400
M16060000
M18060000
MCS8-0900

DESCRIPTION QTY

Frame, Main

Tube, Vacuum

Axle Mount
Screw, Cap, 1/2-13 UNC x 1-1/4", Plated, Grade 5
Screw, Cap, 1/2-13 UNC x 1-1/2", Plated, Grade 5

Washer, Flat, 1/2", Plated

Nut, Hexagon, 1/2-13 UNC, Self-Locking, Plated

Wheel, Caster

Washer, Flat, 3/4", Plated

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

Washer, Lock, 1/4", Plated

Screw, Cap, 1/4-20 UNC x 3/4", Plated, Grade 5

Cap, Dust Cover

Plug, Pipe, 1/4 NPTF, Square

Fitting, Reducing (Not Used With Item 14)

Valve (Not Used With Item 14)

Axle

Screw, Cap, 3/8-16 UNC x 1-3/4", Plated, Grade 5

Washer, Lock, 3/8", Plated

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

Hose, Jumper

1
1
1
2
2
4
4
2
2
2
4
4
1
1
1
1
1
2
2
2
1

SP684 SURFACE SHARK SURFACE PLANER PAGE 45

Rear Frame Assembly

SP684 SURFACE SHARK Surface Planer

PAGE 46 SP684 SURFACE SHARK SURFACE PLANER

Rear Frame Assembly

SP684 SURFACE SHARK Surface Planer

Reference

Number

1

2

3
4
5
6
7
8

9
10
11
12
13
14
15
16

PART

NUMBER

MSP8-0091

MSP8-0112

MSP8-0070
M17120000
M22021200
M23101600
M20030800
MSP8-0450
M53080000
MSP8-0100
MSP8-0460
MSP8-0370
M15063200
M550-0590
M18060000
M16060000

DESCRIPTION QTY

Assembly, Rear Frame Mount

(Includes P/N SP8-0450 and 550-0590

Assembly, Rear Axle Mount

(Includes P/N SP8-0450 and SP8-0460)

Wheel, Caster

Washer, Flat, 3/4", Plated

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

Pin, Clevis, 5/8" x 2", Plated

Pin, Roll, 3/16" x 1", Plated

Bushing, Connex®

Nut, Hexagon, 1/2-13 UNC, Self-Locking, Plated

Shaft, Hinge, Plated

Bushing, Connex®

Axle

Screw, Cap, 3/8-16 UNC x 4", Plated, Grade 5

Fitting, Grease

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

Washer, Lock, 3/8", Plated

1

1

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

SP684 SURFACE SHARK SURFACE PLANER PAGE 47

Driveshaft Assembly

SP684 SURFACE SHARK Surface Planer

PAGE 48 SP684 SURFACE SHARK SURFACE PLANER

Driveshaft Assembly

SP684 SURFACE SHARK Surface Planer

Reference

Number

1
2
3
4
5
6
7
8
9

10
11
12
13
14
15
16
17
18
19
20
21

PART

NUMBER

MSP8-0290
MSP8-0201
MSP8-0211
MSP8-0221
M15050800
MSP8-0241
MSP8-0421
M52060000
MSP8-0231
M60061200
M15080800
MSP8-0251
MSP8-0330
MSP8-0340
MSP8-0560
MSP8-0570
MSP8-0600

MSP8-0590
MGP8-0090
MSP8-0440
MSP8-4000

DESCRIPTION QTY

Ring, Retaining, External

Sheave, Driveshaft

Key, Special

Sheave, Center Hub (Includes P/N SP8-0211)

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

Driveshaft

Bearing, Sealed

Nut, Hex, Self-Locking, 3/8-16 UNC, Plated

Block, Bearing Mounting

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

Screw, Cap, 1/2-13 UNC x 3/4", Plated, Grade 5

Plate, Main Frame Side

Insert, Hex

Bushing, Dowel

Fitting, Grease, 90° x 1/8" NPT

90° Street Elbow, 1/8" NPT x 1/8" NPT

Hose, Grease

Fitting, Grease, Straight, 1/8" NPT

Spacer

Hose Mount

Washer, Hardened

2
1
1
1
3
1
2
8
2
8
4
1
1
2
1
1
1
1
2
1
4

SP684 SURFACE SHARK SURFACE PLANER PAGE 49

Gasoline Engine Assembly

SP684 SURFACE SHARK Surface Planer

PAGE 50 SP684 SURFACE SHARK SURFACE PLANER

Gasoline Engine Assembly

SP684 SURFACE SHARK Surface Planer

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

PART

NUMBER

MSP8-0051

MGX160K1QXC9

MSP8-0270
MSP8-0280
M15040600
MSP8-0290
MSP8-0010
M15051600
MSP8-0020

MCOV-0411

M15040600
M17040000
M53050000
M16040000
M18040000
MSP8-0380

M3VX335
MSP8-0300
M17060000
M53060000
MSP8-0400
MSP8-0390

M660-0490

DESCRIPTION QTY

Frame, Main

Engine, Honda, (5.5 HP)

Sheave, Engine

Bushing, Center Hub

Screw, Cap, 1/4-20 UNC x 3/4", Grade 5

Key, Standard, 3/16" x 3/16" x 1-1/2"

Bracket, Engine Mount

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

Screw, Cap, Full Thread, Engine Take-up, Plated

Clamp, Plated

Screw, Cap, 1/4-20 UNC x 3/4", Plated, Grade 5

Washer, Flat, 1/4", Plated

Nut, Hexagon, 5/16-18 UNC, Self-Locking, Plated

Washer, Lock, 1/4", Plated

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

Cap, Plastic

V-Belt

Shroud, V-Belt Safety

Washer, Flat, 3/8", Plated

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

Adapter

Hose, Oil Drain

Cap, Female, 1/4" NPT

Ref

1
1
1
2
1
2
4
2
2
1
4
6
1
1
2
1
1
3
3
1
1
1

SP684 SURFACE SHARK SURFACE PLANER PAGE 51

Operator Handle Assembly

SP684 SURFACE SHARK Surface Planer

PAGE 52 SP684 SURFACE SHARK SURFACE PLANER

Operator Handle Assembly

SP684 SURFACE SHARK Surface Planer

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

PART

NUMBER

MSP8-0142
MSP8-0131
MSP8-0160
MSP8-0410

M99502H
M15081000
M53060000
M17080000
M53080000

MCS8-0350
M20031200
MCS8-0240

M200682
MCS8-0420
MCS8-0190

M18100000 LH

M56200000
MSP8-0160
MSP8-0171
MCS8-0210
M18060000
MCS8-0200
M81063000
M15060800

MSG24-4000

M84100000
M19100001
M40100011
MSP8-0180
M20030600

MSP684H-0370

M22x18 T-TAP

MKIC-172

MSP684-5040

DESCRIPTION QTY

Handle, Operator

Screw, Crank

Knob, Handle

Screw, Socket Head, Special

Bearing

Screw, Cap, 1/2-13 UNC x 1-1/4", Plated, Grade 5

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

Washer, Flat, 1/2", Plated

Nut, Hex, 1/2-13 UNC, Self-Locking, Plated

Switch, Shut-Off

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

Lever
Washer, Plastic
Bearing, Oilite®

Hinge, W/Bearings
(Includes 2 Of Part Number CS8-0420)
Nut, Hexagon, 5/8-11 UNC, LH, Plated

Clamp, Hose, 1-1/4", Plated

Boot, Sleeve

Barrel, Adjusting

Tube, Bearing

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

Shaft, Over Center

Screw, Cap, 3/8-16 UNC x 3-3/4", Stainless

Screw, Cap, 3/8-16 UNC x 1", Plated, Grade 5

Washer, Flat, 5/8", Special, Plated

Washer, Bellville

Nut, Hexagon, 5/8-18 UNF, Self-Locking, Plated, Grade 5

Nut, Hex, Jam, 5/8-18 UNF, Left Hand Thread, Plated

Rod, End

Pin, Roll, 3/16" x 3/4"

Wire Loom, Shut-Off

T-Tap, 22-18 Gauge Wire

Ring, Kick-Out

Sign, Planer Quik-tips

1
1
2
1
2
4
4
4
4
1
1
1
2
4
2

2
1
1
1
1
1
1
1
4
1
2
1
1
1
1
1
1
2
1

SP684 SURFACE SHARK SURFACE PLANER PAGE 53

One Section Drum Assembly

SP684 SURFACE SHARK Surface Planers

Two Section Drum Assembly

SP684 SURFACE SHARK Surface Planer

PAGE 54 SP684 SURFACE SHARK SURFACE PLANER

One Section Drum Assembly

SP684 SURFACE SHARK Surface Planer

Reference

Number

1
2
3
4
5
6
7
8

PART

NUMBER

MSP8-2000-010
MSP8-2000-040
MSP8-2000-050

M27040800
M16040000
M52040000

MSP8-2000-030

MSP8-2000-A

Screw, C/S, Allen Head, 1/4-20 UNC x 1", Plated

Nut, Hex, 1/4-20 UNC, Self-Locking, Plated

Flail Drum, 1 Section, Complete, Less Flails

DESCRIPTION QTY

Drum, Flail, One Section

Rod, Flail Drum

Cap, End, Flail Drum

Washer, Lock, 1/4", Plated

Strap, Support

Includes 4 Support Straps

Two Section Drum Assembly

SP684 SURFACE SHARK Surface Planer

1
4
2
8
8
8
8
1

Reference

Number

1
2
3
4
5
6
7

PART

NUMBER

MSP8-2100-010
MSP8-2000-040
MSP8-2000-050

M27040800
M16040000
M52040000

MSP8-2100-A

DESCRIPTION QTY

Drum, Flail, Two Section

Rod, Flail Drum

Cap, End, Flail Drum

Screw, C/S, Allen Head, 1/4-20 UNC x 1", Plated

Washer, Lock, 1/4", Plated

Nut, Hex, 1/4-20 UNC, Self-Locking, Plated

Flail Drum, 2 Section, Complete, Less Flails

1
4
2
8
8
8
1

SP684 SURFACE SHARK SURFACE PLANER PAGE 55

Flails And Spacer Washers

SP684 SURFACE SHARK Surface Planer

1

2

3

4

PAGE 56 SP684 SURFACE SHARK SURFACE PLANER

Flails And Spacer Washers

SP684 SURFACE SHARK Surface Planer

Reference

Number

1
2
3

4

PART

NUMBER

MSP8-3100
MSP8-3300

MSP8-3200

MSP8-4000

DESCRIPTION QTY

Flail, Beam, Heat Treated Alloy Steel

Flail, Milling, Heat Treated Alloy Steel

With Tungsten Carbide Inserts

Flail, Pentagonal, Heat Treated Alloy Steel

With Tungsten Carbide Inserts

Washer, Spacing, Heat Treated Alloy Steel

As Needed
As Needed

As Needed

As Needed

SP684 SURFACE SHARK SURFACE PLANER PAGE 57

NOTES

PAGE 58 SP684 SURFACE SHARK SURFACE PLANER

NOTES

SP684 SURFACE SHARK SURFACE PLANER PAGE 59

Marshalltown, IA

Phone [phone]

Fax [phone]

www.marshalltown.com