Art's-Way Manufacturing 6520 User manual

OPERATOR’S MANUAL
Art’s-Way Manufacturing Co., Inc.
Model 6520
Grinder Mixer
Operator’s Manual
584990
Issued 08-2011

This symbol means ATTENTION! BECOME ALERT! YOUR
SAFETY IS INVOLVED. The message that follows the symbol
contains important information about your safety. Carefully read
the message. Make sure you fully understand the causes of
possible injury or death.
IF THIS MACHINE IS USED BY AN EMPLOYEE, IS LOANED, OR IS RENTED, MAKE
SURE THAT THE OPERATOR UNDERSTANDS THE TWO INSTRUCTIONS BELOW.
BEFORE THE OPERATOR STARTS THE ENGINE:
1. GIVE INSTRUCTIONS TO THE OPERATOR ABOUT SAFE AND CORRECT USE OF
THE MACHINE.
2. MAKE SURE THE OPERATOR READS AND UNDERSTANDS THE OPERATOR’S
MANUAL FOR THIS MACHINE.
IMPROPER OPERATION OF THIS MACHINE CAN CAUSE INJURY OR
DEATH.
BEFORE STARTING THE ENGINE, DO THE FOLLOWING:
1.READ THE OPERATOR’S MANUAL.
2.READ ALL SAFETY DECALS ON THE MACHINE.
3.CLEAR THE AREA OF OTHER PERSONS.
LEARN AND PRACTICE SAFE USE OF MACHINE CONTROLS IN A
SAFE AND CLEAR AREA BEFORE YOU OPERATE THIS MACHINE ON
A JOB SITE.
It is your responsibility to observe pertinent laws and regulations and to
follow manufacturer’s instructions on machine operation and maintenance.
See your Authorized Art’s-Way Manufacturing Co., Inc. dealer or
Art’s-Way Manufacturing Co., Inc. for additional operator’s manuals,
illustrated parts catalogs, and service manuals.
WARNING

TO THE OWNER 1
TO THE OWNER
Congratulations on the purchase of your new Art’s-Way 6520 Grinder Mixer. You have selected a top quality
machine that is designed and built with pride to ensure you have many years of efficient and reliable service.
Many people have worked on the design, production, and delivery of this 6520 Grinder Mixer. The information
in this Manual is based on the knowledge, study, and experience through years of specializing in the
manufacturing of farm machinery. This Manual is designed to provide you with important information
regarding safety, maintenance, and machine operation so you can and will get the best possible performance
from your 6520 Grinder Mixer.
Even if you are an experienced operator of this or similar equipment, we ask that you read this manual
before operating the 6520 Grinder Mixer. The way you operate, adjust, and maintain this unit will have
much to do with its successful performance. Any further questions you may have about this product of Art’s-
Way equipment should be directed to your local Art’s-Way dealer or to Art’s-Way Manufacturing Co., Inc.,
Armstrong, Iowa, 50514, [phone].
SPECIFICATIONS AND DESIGN ARE SUBJECT TO CHANGE WITHOUT NOTICE
Art’s-Way Manufacturing Co., Inc. is continually making product improvements. In doing so, we reserve the
right to make changes and/or add improvements to our products without obligation for the equipment
previously sold.
Modifications to this 6520 Grinder Mixer may affect the performance, function, and safety of its operation.
Therefore, no modifications are to be made without the written permission of Art’s-Way Manufacturing Co.,
Inc. Any modification made without the written permission of Art’s-Way Mfg. Co. shall void the warranty of this
product.
In the interest of continued safe operation of this 6520 Grinder Mixer, pay particular attention to the safety
alert symbol(s) throughout this Manual.
ART’S-WAY MANUFACTURING CO., INC.STATEMENT OF PRODUCT LIABILITY
Art’s-Way Manufacturing Co., Inc. recognizes its responsibility to provide customers with a safe and efficient
product. Art’s-Way Manufacturing Co., attempts to design and manufacture its products in accordance with all
accepted engineering practices effective at the date of design. This statement should not be interpreted to
mean that our products will protect against the user’s own carelessness or failure to follow common safety
practices nor will Art’s-Way Manufacturing Co., be liable for any such act. In addition, Art’s-Way
Manufacturing Co. assumes no liability for any altered product or any modified product by users or anyone
other than an authorized dealer.
IMPORTANT WARRANTY INFORMATION
The warranty for this 6520 Grinder Mixer appears on page 3 of this Manual. In order to establish proper
warranty registration, the Warranty Registration must be completed and returned to the factory. Failure to
comply with this requirement may result in reduced warranty allowances.
LIMITATIONS OF THIS MANUAL
This Manual contains operating instructions for your 6520 Grinder Mixer only. Any mention of other machinery
in this manual other than the 6520 Grinder Mixer is for reference only. This manual does not replace nor is it
to be used for any machinery that may be attached to or used in conjunction with the 6520 Grinder Mixer.

2Parts & Service
PARTS & SERVICE
As the purchaser of your new 6520 Grinder Mixer, it is very important to consider the following factors:
A. Original Quality
B. Availability of Service Parts
C. Availability of Adequate Service Facilities
Art’s-Way Manufacturing Co., Inc. has an excellent dealership network ready to answer any questions you
may have about your 6520 Grinder Mixer. Parts for your machine may be ordered through our dealers. When
placing a parts order, please have the model and serial number ready. This will allow the dealer to fill your
order as quickly as possible.
For your convenience, we have provided this space for you to record your model number, serial number, and
the date of purchase, as well as your dealer’s name and address.
Owner’s Name:
Owner’s Address:
Purchase Date:
Dealership Name:
Dealership Address:
Dealership Phone No.:
6520 Grinder Mixer Serial Number Location
The placard containing the serial and model number is located on the front left-hand side of
the 6520 grinder mixer next to ladder. Enter the serial and model number of your 6520
grinder mixer within the space provided.
Figure 1 - Serial Number Placard Location.
Figure 2 - Serial Number Placard.

TABLE OF CONTENTS 3
TABLE OF CONTENTS
TO THE OWNER..........................................................1
SPECIFICATIONS AND DESIGN ARE SUBJECT TO CHANGE
WITHOUT NOTICE........................................................1
ART’S-WAY MANUFACTURING CO., INC.STATEMENT OF
PRODUCT LIABILITY.....................................................1
IMPORTANT WARRANTY INFORMATION........................... 1
LIMITATIONS OF THIS MANUAL .....................................1
PARTS & SERVICE......................................................2
TABLE OF CONTENTS ...............................................3
LIMITED WARRANTY..................................................5
SAFETY FIRST.............................................................6
NOTICES OF DANGER,WARNING,AND CAUTION............6
SAFETY GUIDELINES.................................................7
BEFORE OPERATING ...................................................7
DURING OPERATION....................................................7
MAINTENANCE SAFETY ................................................7
HYDRAULIC SAFETY .................................................... 8
TRANSPORTATION SAFETY...........................................8
STORAGE SAFETY.......................................................8
TIRE SAFETY ..............................................................8
ASSEMBLY SAFETY......................................................9
SAFETY DECALS ......................................................10
DECAL LOCATIONS &IDENTIFICATION..........................10
INTRODUCTION.........................................................13
PREPAIRING THE GRINDER MIXER FOR
OPERATION...............................................................15
TIRES.......................................................................15
GUARDS,DOORS,AND SHIELDS.................................15
BOLTS AND NUTS .....................................................15
PREPARING THE TRACTOR.........................................16
TRACTOR HITCH .......................................................16
ATTACHING TO THE TRACTOR....................................16
HAMMER MILL ...........................................................17
BEFORE GRINDING....................................................17
DETACHING FROM THE TRACTOR ............................... 17
OPERATION OF GRINDER MIXER...........................18
TRACTOR PTO ENGAGEMENT ....................................18
HAMMER MILL CLUTCH PIN......................................... 18
FEED GATE .............................................................. 18
HAY RETARD BOLTS.................................................. 18
HAMMER MILL SCREENS.............................................18
CHANGING SCREENS.................................................19
PROCESSING HAY.....................................................20
PROCESSING WITHOUT MIXING ..................................20
ADDING CONCENTRATE OR SUPPLEMENT.................... 20
FILLING THE MIXER TANK ..........................................21
SPRING LOADED TANK LID .........................................21
DISCHARGE AUGER POSITIONING ...............................22
DISCHARGE GATE FUNCTION...................................... 22
FOLDING AUGER EXTENSION......................................22
UNLOADING AUGER HOOD .........................................23
AUGER FEED OPERATION ..........................................23
GRINDER MIXER ADJUSTMENTS ...........................26
DRIVE CHAIN ADJUSTMENTS ......................................26
MAIN DRIVE CHAIN ....................................................26
MAIN DRIVE BELTS ....................................................26
HAMMER MILL DOOR ..................................................27
HYDRAULIC SWING ADJUSTMENT ................................28
SWIVEL STOP............................................................28
SWIVEL STOP ADJUSTMENT........................................28
DISCHARGE AUGER DRIVE ADJUSTMENT......................28
WHEEL BEARINGS .....................................................29
LUBRICATION........................................................... 30
PTO DRIVELINE ........................................................30
HAMMER MILL SHAFT BEARINGS..................................30
DRIVE BELT IDLER TENSIONER....................................31
HAMMER MILL ENGAGING PIN......................................31
DRIVE SHAFT BEARINGS ............................................31
CHAINS.....................................................................32
GEARBOX .................................................................32
LOWER VERTICAL MIXING AUGER................................32
UPPER VERTICAL MIXING AUGER ................................33
DISCHARGE U-JOINT.................................................33
DISCHARGE PIVOT PIN ..............................................33
WHEELS ...................................................................33
SERVICE.................................................................... 34
TORQUE SPECIFICATIONS...........................................34
SHEAR BOLTS ...........................................................34
SPROCKET AND CHAIN ALIGNMENT .............................34
REPLACEMENT OF WORN OR DAMAGED HAMMERS ......35
REVERSING THE HAMMERS ........................................35
STANDARDSPACING FOR96 HAMMERS...........35
ALTERNATE SPACINGFOR 96 HAMMERS..........36
MAIN DRIVE BELT REPLACEMENT................................36
SELF-CONTAINED: PREPARING FOR
OPERATION.............................................................. 40
SELF-CONTAINED: OPERATION ............................ 45
DISCHARGE AUGER LIFT CYLINDER ADJUSTMENT .........47
DISCHARGE AUGER SWING MOTOR ADJUSTMENT.........47
DISCHARGE AUGER LIFT CYLINDER AND SWING MOTOR
PRESSURE RELIEF ADJUSTMENT.................................47
SELF-CONTAINED: ADJUSTMENT/SERVICE &
LUBRICATION........................................................... 48
MAIN DRIVE BELTS ....................................................48
HYDRAULIC VALVES...................................................48
LUBRICATION.............................................................48
HYDRAULIC FILTRATION..............................................48
FILLER/BREATHER FILTER ..........................................49
SELF CONTAINED: TROUBLESHOOTING
GUIDE........................................................................ 50
SELF CONTAINED: REMOTE CONTROL
ERROR CODES......................................................... 52
ATTACHMENTS ........................................................ 53
ELECTRONIC SCALE ATTACHMENT ..............................53
ADJUSTABLE SCALE ARM ATTACHMENT .......................53
DISCHARGE UNLOADING AUGER EXTENSIONS ..............53
SCREENS..................................................................53
HYDRAULIC ROLL FEED..............................................53
ROLL FEED ADJUSTMENT ...........................................54
SPECIFICATIONS ..................................................... 55

4TABLE OF CONTENTS
TANK AND FRAME......................................................55
DISCHARGE AUGER ...................................................55
AUGER FEEDER ........................................................55
MIXING AUGER..........................................................55
SUPPLEMENT HOPPER...............................................55
HAMMERMILLS ..........................................................55
SPECIFICATIONS: SELF-CONTAINED
HYDRAULICS.............................................................56
PUMP.......................................................................56
HYDRAULIC RESERVOIR.............................................56
FILTERS/STRAINERS/BREATHERS................................56
HYDRAULIC MOTORS .................................................56
VALVES....................................................................56
ELECTRIC ACTUATOR ................................................57
ELECTRIC CONTROL BOX ...........................................57
WIRELESS REMOTE CONTROL.....................................57
REMOTE CONTROL RECEIVER.....................................57
SCHEMATICS: SELF-CONTAINED
HYDRAULICS............................................................ 58
CONTROL BOXWITH 4FT.WIRING HARNESS...59
WIRINGHARNESS VALVE BANK, MANIFOLD, &
ACTUATOR............................................................59
RECEIVER 8-OUTPUT...........................................60
OPTIONAL 20 FT.WIRE HARNESS EXTENSION .60
ART’S-WAY MANUFACTURING CO., INC.
TECHNICAL MANUALS............................................61

TABLE OF CONTENTS 5
LIMITED WARRANTY
Art’s-Way Manufacturing Co., Inc. warrants the products it sells to be free from defects in
material and workmanship for a period of one (1) year after the date of delivery to the first
(original) purchaser, subject to the following conditions:
Art’s-Way Manufacturing Co., Inc. obligation and liability under this
warranty is to repair or replace (at the company’s option) any parts that
upon manufacture were defective in material or workmanship.
All parts and repairs under this warranty shall be supplied at Art’s-Way
Manufacturing Co., Inc. or an authorized Art’s-Way Manufacturing Co.,
Inc. dealer, at the option of Art’s-Way Manufacturing Co., Inc.
Art’s-Way Manufacturing Co., Inc. warranty does not extend to parts
and elements not manufactured by Art’s-Way Manufacturing Co., Inc.
and which carry the warranty of other manufacturers.
Transportation or shipping to an authorized dealer for necessary
repairs is at the expense of the purchaser.
Art’s-Way Manufacturing Co., Inc. makes no other warranty expressed
or implied and makes no warranty of merchantability or fitness for any
particular purpose beyond that expressly stated in this warranty. Art’s-
Way Manufacturing Co., Inc. liability is limited to the terms set forth in
this warranty and does not include any liability for direct, indirect,
incidental or consequential damages or expenses of delay and the
Company’s liability is limited to repair or replacement of defective parts
as set forth herein.
Any improper use and/or maintenance, including operation after
discovery of defective or worn parts, operation beyond the rated
capacity, substitution of parts not approved by Art’s-Way
Manufacturing Co., Inc., or any alternation or repair by other than an
authorized Art’s-Way Manufacturing Co., Inc. dealer which affects the
product materially and adversely, shall void the warranty.
No dealer, employee or representative is authorized to change this
warranty in any way or grant any other warranty unless such change is
made in writing and signed by an officer of Art’s-Way Manufacturing
Co., Inc.
Some states do not allow limitations on how long an implied warranty
lasts or exclusions of, or limitations on relief such as incidental or
consequential damages, so the above limitations or exclusions may
not apply to you. This warranty gives you the specific legal rights and
you may have other rights that vary from state to state.

6SAFETY FIRST
SAFETY FIRST
“A careful operator is the best insurance against an accident”
(National Safety Council)
Most accidents can be prevented if the operator:
Fully understands how the machine functions
Can anticipate situations which may produce problems
Can make necessary corrections before problems develop
THIS SYMBOL MEANS
ATTENTION!
BECOME ALERT!
YOUR SAFETY IS INVOLVED!
The American Society of Agricultural Engineers has adopted the Universal Safety Alert Symbol as a way to
identify areas of potential danger if the equipment is not operated correctly (see Figure 3). Please be alert
whenever you see this symbol in the manuals or on your Grinder Mixer.
Art’s-Way Manufacturing Co., Inc. strives to make our equipment as safe as possible. The Art’s-Way 6520
Grinder Mixer conforms to applicable safety standards at the time of manufacturing. A safety conscious
equipment operator makes an effective accident-prevention program complete.
Safety features and instructions for the Grinder Mixer are detailed in the section of this Operator’s Manual. It
is the responsibility of the owner to ensure that all operators read and understand the manual before they are
allowed to operate the Grinder Mixer. (Occupational Safety and Health Administration (OSHA) regulations
1928.57.)
NOTICES OF DANGER,WARNING,AND CAUTION
Signal Words: Note the use of signal words DANGER, WARNING, and CAUTION on the Grinder Mixer and
in this manual. The appropriate signal word for each has been selected using the following guidelines:
DANGER: IMMEDIATE AND SPECIFIC HAZARD WHICH WILL
RESULT IN SEVERE PERSONAL INJURY OR DEATH IF PROPER
PRECAUTIONS ARE NOT TAKEN.
WARNING: SPECIFIC HAZARD OR UNSAFE PRACTICE COULD
RESULT IN SEVERE PERSONAL INJURY OR DEATH IF PROPER
PRECAUTIONS ARE NOT TAKEN.
CAUTION: A REMINDER OF GOOD SAFETY PRACTICES.
PERSONAL INJURY COULD RESULT IF PROPER PROCEDURES
ARE NOT FOLLOWED.
Figure 3 - Universal Safety Alert Symbol.

SAFETY GUIDELINES 7
SAFETY GUIDELINES
Remember:
“The Best Operator is a Safe Operator”
CAUTION: READ AND UNDERSTAND
THE OPERATOR’S MANUAL AND ALL
THE SAFETY DECALS BEFORE
OPERATING THE GRINDER MIXER.
REVIEW ALL SAFETY INSTRUCTIONS
WITH ALL OPERATORS ANNUALLY.
BEFORE OPERATING
Do not wear loose fitting clothing as it may catch
in moving parts.
Make sure to install and/or secure all guards,
doors and shields, including the tractor power
take-off (PTO) master shield, before starting or
operating the Grinder Mixer.
Be sure that the correct implement driveline
parts are used and that they are properly
secured.
Install the safety chain when attaching the
Grinder Mixer to the tractor.
Clear the area of bystanders, especially
children, when making repairs, adjustments or
performing maintenance on the Grinder Mixer.
Do not allow riders.
Put all tractor and machine controls in “neutral”
and disengage the PTO before starting. Follow
the starting instructions according to your tractor
Manual.
Operate the Grinder Mixer only while seated on
the tractor seat.
Make sure the unit is adequately supported with
safety blocks or safety stands when changing
tires or performing maintenance.
CAUTION: KEEP CLEAR OF MOVING
PARTS. BE SURE TO SHUT OFF THE
TRACTOR AND SET THE PARKING
BRAKE. REMOVE THE TRACTOR KEY
WHILE MAKING ANY ADJUSTMENTS.
WAIT FOR ALL MOVEMENT TO STOP
BEFORE APPROACHING THE
MACHINE.
DURING OPERATION
Keep hands, feet, hair, and clothing away from
moving parts.
Keep all guards, doors and shields in place and
in good working condition.
Keep all bystanders, especially children, away
from the grinder mixer while in operation.
Do not allow riders while the grinder mixer is in
operation.
Do not attempt to unclog, clean, or adjust the
grinder mixer while it is running.
Stay away from overhead power lines.
Electrocution can occur even without direct
contact.
Keep all hydraulic lines, fittings, and couplers
tight and free of leaks. (Refer to - Hydraulic
Safety.)
Use caution when ascending or descending on
the grinder mixer. Wet shoes or boots are
slippery.
MAINTENANCE SAFETY
Follow all operating, maintenance and safety
instructions found in this Manual.
Before servicing, adjusting, repairing or
unclogging the machine, always make sure the
tractor engine is stopped, the parking brake is
set, and all the moving parts have stopped.
Use sufficient tools, jacks, and hoists that have
the capacity for the job.
Use support blocks or safety stands when
changing tires or performing maintenance.
Follow good shop practices of keeping the
service area clean and dry and use adequate
light for the job at hand.
Before applying pressure to the hydraulic
system, make sure all lines, fittings and couplers
are tightly secured and in good condition.
Make sure all guards, doors and shields are in
place and properly secured when performing
maintenance.

8SAFETY GUIDELINES
HYDRAULIC SAFETY
Make sure components in the hydraulic system
are kept clean and in good working condition.
Relieve pressure from the hydraulic system
before servicing or disconnecting from the
tractor.
Keep all hydraulic lines, fittings, and couplers
tightly secured and free of leaks.
Replace any worn, cut, abraded, flattened or
crimpled hoses.
Do not make any temporary repairs to the
hydraulic lines, fittings or hoses using tape,
clamps, or cement. The hydraulic system
operates under extremely high pressure and
temporary repairs may fail suddenly and create
a hazardous and or dangerous situation.
Wear proper hand and eye protection when
searching for a high-pressure hydraulic leak.
Use a piece of wood or cardboard as a backstop
instead of hands to identify and isolate a leak. If
injured by a concentrated high-pressure stream
of hydraulic fluid, seek medical attention
immediately. Serious infection or toxic reaction
can develop if hydraulic fluid penetrates the
surface of the skin.
Before applying pressure to the system, make
sure all components are tight and that the
hydraulic lines, hoses, and couplings are not
damaged.
TRANSPORTATION SAFETY
Make sure the grinder mixer complies with all
local regulations regarding the transportation of
equipment on public roads and highways.
Make sure the Slow Moving Vehicle (SMV)
emblem and all lights and reflectors required by
local highway and transportation authorities are
properly in place, clean, and clearly visible to
traffic.
Do not allow riders on any machinery during
transport.
Make sure the grinder mixer is securely attached
to the tractor and install a safety chain to the
grinder mixer.
Make sure the tractor brake pedals are latched
together.
Do not exceed 20 mph (32 km/h) when
transporting the grinder mixer. Always reduce
speed on rough roads and surfaces, or when
going down inclines.
Use caution when turning and always use the
turn signals on the tractor to indicate your
turning intentions to the other traffic.
The weight of the trailed machine should
NEVER exceed the weight of the towing vehicle.
Check all clearances carefully whenever the
machine is towed.
Lower the elevator into the transport position
before transporting the harvester on the
highway.
Stay away from overhead obstructions and
power lines during transport. Electrocution can
occur even without direct contact.
STORAGE SAFETY
Store the grinder mixer in an area away from
human activity.
Do not permit children to play on or around the
stored machine at any time.
Make sure that the grinder mixer is stored in an
area with a firm and level base to prevent the
machine from tipping or sinking into the ground.
Block the wheels to prevent the machine from
rolling.
TIRE SAFETY
Have only a qualified tire dealer or tire repair
service perform tire repairs.
Do not attempt to install a tire on a wheel or rim
unless you have the proper equipment and
experience to do the job.
Follow proper procedures when installing a tire
on a wheel or rim to prevent an explosion that
could result in serious injury.
Do not substitute tires with a lesser road rating
and/or capacity for the original equipment tires.
CAUTION: FAILURE TO FOLLOW
PROPER PROCEDURES WHEN
INSTALLING A TIRE ON A WHEEL OR
RIM CAN PRODUCE AN EXPLOSION
THAT MAY RESULT IN SERIOUS
INJURY OR DEATH. DO NOT ATTEMPT
TO INSTALL A TIRE UNLESS YOU
HAVE THE PROPER EQUIPMENT AND
EXPERIENCE TO PERFORM THE JOB.
REPLACEMENT, REPAIR, AND/OR
MAINTENANCE SHOULD BE DONE BY
A QUALIFIED TIRE DEALER OR
QUALIFIED REPAIR SERVICE.

SAFETY GUIDELINES 9
ASSEMBLY SAFETY
Use adequate manpower to perform assembly
procedures safely.
Assemble the grinder mixer in an area with
sufficient space to maneuver the largest
components and allow easy access to all sides
of the machine.
Use only forklifts, lift cranes, jacks and tools with
sufficient capacity for the loads.
Do not allow spectators, especially children, in
the working area.
Remember:
“The Best Operator is a Safe Operator”

10 SAFETY DECALS
SAFETY DECALS
DECAL LOCATIONS &IDENTIFICATION
The different types of safety decals for your 6520 Grinder Mixer are illustrated on the following pages. Please
familiarize yourself with the appearance of each decal, the warning it describes, and the area where it is
located on the grinder mixer (see Figure 4, Figure 5, and Figure 6).
Safety awareness is the responsibility of each operator of the grinder mixer. Keep safety decals and signs
clean and legible and be sure replacement parts display the current safety decals and signs as well.
Remember: Always replace missing, damaged or illegible safety decals. New decals and signs are
available from an authorized dealer.
Figure 4 - Safety Decal Locations.
NOTE: Keep all decals clean and free of dirt for maximum visibility. Replace all individual decals that are no
longer legible. Read and obey all safety decals and be familiar with their meaning.

SAFETY DECALS 11
1. DANGER –Rotation Mechanism (363000)
3. DANGER - 540 RPM PTO (384030)
5. DANGER –Rotating Driveline (268860)
2. DANGER - Shield Missing (467430)
4. DANGER - 1000 RPM PTO (384020)
6. DANGER –Auger Feeder Hazard (383990)
Figure 5 - Safety Decals.
NOTE: Keep all decals clean and free of dirt for maximum visibility. Replace all individual decals that are no
longer legible. Read and obey all safety decals and be familiar with their meaning.

12 SAFETY DECALS
7. DANGER –Electrocution Hazard (384000)
9. WARNING –Moving Part Hazard (467450)
11. WARNING –High Pressure Fluid Hazard (346310)
8. WARNING –Moving Flywheel Hazard (368350)
10. CAUTION –Safety Instructions (368040)
12. CAUTION –Do Not Open (377280)
13. CAUTION –Hitch Instructions (383970)
Figure 6 - Safety Decals.
NOTE: Keep all decals clean and free of dirt for maximum visibility. Replace all individual decals that are no
longer legible. Read and obey all safety decals and be familiar with their meaning.

INTRODUCTION 13
Figure 7 - Model 6520 With Auger Feeder (A –PTO Driveline; B –Hammer mill; C –Mixing Tank; D –Dust
Collector; E –Supplemental Hopper; F –Unloading Auger; G –Viewing Windows; H –Auger Feeder).
INTRODUCTION
This manual has been prepared to make you
familiar with the proper operation, adjustment,
lubrication and service of your grinder mixer. Take
time to be careful and better understand the
efficient operation and care of your machine.
Whenever the terms “Left” and “Right” are used, it
should be understood to mean standing behind
the machine and facing the direction of forward
travel.
Some pictorials are used to show guards,
doors and shields removed for easy
identification. Make sure that all guards, doors
and shields are in place before operating the
machine. They are for your protection.
The Art’s-Way 6520 Grinder Mixer is driven by a
PTO driveline of 80 hp to 150 hp tractors. (Figure
7, Detail A.) When using a tractor over 150 hp,
limit input. It is factory available with either a 540
or 1000 RPM drive.
Hammer mill respective speed should be
maintained as the hammer mill cylinder operates
best at 2800 to 3000 RPM. (Figure 7, Detail B.)
Hammer mill cylinder must not exceed 3000 PRM.
CAUTION: NEVER OPERATE A 540
RPM PROCESSOR WITH A 1000 RPM
TRACTOR.
Before operating your grinder mixer, select and
install the screen size desired. Sizes are available
from 1/8 to 2 inch openings. For screen selection
guidelines, refer to OPERATION OF GRINDER
MIXER –Hammer mill Screens.
All types of grain can be ground with the hammer
mill. Hay can be ground with a minimum of 1/3
mixer of grain. Material is fed into the hammer mill
where it is ground until it can pass through the
screen size selected. From the hammer mill, the
material is augered into the mixing tank. (Figure 7,
Detail C.) A suction fan takes air pressure out of
the hammer mill housing and delivers feed fines
into the dust collector. (Figure 7, Detail D.) The
fines are separated and then dropped into the mill
to mixer auger.
If supplement is to be added to the ration, a
hopper with a sack cutter is located at the right
rear of the mixing tank. (Figure 7, Detail E –
Supplement Auger.) The best mixing will result if
the supplement is added before grinding.
The ground feed is mixed continuously until the
tractor PTO is disengaged.
The unloading auger pivots at the left rear of the
mixing tank and can swing 225 degrees on the
grinder mixer in a horizontal arc. (Figure 7, Detail
F.) It can also swing in a vertical arc to the limit of
the lift cylinder. Unloading rates up to 50 bushels
A
D
F
E
H
B
C
G

14 INTRODUCTION
per minute can be obtained depending upon
position of the discharge and the type of material
processed.
Three viewing windows are located at the front
right corner of the mixing tank to observe the feed
level during grinding and mixing. (Figure 7, Detail
G.) A ladder is located at the front left corner of the
mixing tank to gain access to the spring-loaded
mixing tank lid.
CAUTION: DO NOT OPEN SPRING-
LOADED MIXING TANK LID WHILE PTO
IS ENGAGED AND TRACTOR IS
RUNNING.
Many convenient features are standard equipment
on the Art’s Way 6520 grinder mixer including:
6520
1. 13.5 x 16.1 tires.
2. Magnet in the hammer mill throat.
3. Hydraulic positioning of discharge auger. This
includes a hydraulic cylinder for lift and
hydraulic motor for swing.
4. Positioner to enable the hopper on the auger
feeder to be moved in or out 6 inches to
properly position in front of the augers. (Figure
7, Detail H.)
5. Fenders.
6. Screen rack.
7. Tongue jack.
8. Discharge auger hood with spring loaded relief
door.
9. Self-contained hydraulics with electric
activated discharge and wireless remote
control.
10. Highway transport light kit.
Below is a list of optional attachments available:
1. 540 or 1000 PTO.
2. Auger feeder (hydraulic). (See Figure 8.)
Figure 8 - Model 6520 With Self-Contained
Hydraulics, Auger Feeder, Bolt-On 6’ Extension,
Scale, Scale Warning Light, and Scale Arm.
3. Electronic scale, with digital readout.
4. Positioning arm for electronic scale box.
5. Horn, light, or horn and light for electronic
scale.
6. Unloading auger extensions; 3 ft. or 6 ft.
folding or bolt-on.
7. Hydraulic roll feed in mill throat hammer mills.
8. 20’ extension harness to operate backup or
complete control box from tractor.

PREPAIRING THE GRINDER MIXER FOR OPERATION 15
PREPAIRING THE GRINDER MIXER FOR OPERATION
Remove the shipping banding or wire from the
auger feeder (if equipped), rear discharge cover
and the unloading tube to saddle at the side of the
tank.
IMPORTANT: Remove the bag from the
supplement hopper. Place the screen hook in the
hammer mill door pin (see Figure 9).
Install the PTO driveline storage bracket under the
front hitch with 1/2 inch x 1-1/2 inch bolt and lock
nut (see Figure 10). Maintain tension with the lock
nut to allow movement with 15 lbs. pull.
If equipped with auger feeder, remove the
transport locking plate. Refer to OPERATION OF
GRINDER MIXER –Auger Feed Operation and
Figure 36.
Figure 9 - Screen Hook Storage.
Figure 10 - PTO Driveline Storage Bracket.
Install any option that was ordered with the grinder
mixer and shipped as loose equipment. See
package instructions with the specific options for
installation.
Install the implement end of the PTO driveline by
fastening it to the input jackshaft with the 5/16 inch
x 3-1/2 inch clevis pin and cotter pin provided.
Spread the cotter pin and make sure the proper
PTO is used.
CAUTION: NEVER OPERATE A 540
RPM GRINDER MIXER WITH A 1000
RPM TRACTOR.
NOTE: Height of the unloading auger tube needs
to be checked. Move the saddle on the side of the
mixing tank so the tube will properly clear the
tractor and cab.
If equipped with a folding extension, hydraulic
auger feeder, or roll feed, refer to OPERATION
OF GRINDER MIXER - Folding Auger Extension,
Unloading Auger Hood, and Auger Feed
Operation sections as well as the ATTACHMENTS
section for instructions.
TIRES
Keep tires properly inflated. Lack of pressure can
result in torn valve stems, fabric breaks and
uneven tread wear. Too much pressure can cause
undue strain on fabric, excessive tread wear and
allows the tire to cut in more on wet surfaces.
Equal tire pressure reduces grinder mixer sway
when towing.
Recommended tire inflation pressure is as follows:
13.5 x 16.1
8 –PR tires –28 psi
GUARDS,DOORS,AND SHIELDS
Make sure that all of the guards, doors, and
shields are in place and functioning.
BOLTS AND NUTS
Cap screws, except for shear bolts, used on the
grinder mixer are Grade 5 and if replaced, cap
screws of equal or greater strength should be
used. Grade 5 cap screws are identified by three
radial dashes on the hex head. Refer to the SAE
bolt identification guide (see Figure 11).
Figure 11 - SAE Bolt Identification.
IMPORTANT: Shear bolts must be replaced with
bolts of the same grade
Before operation of the grinder mixer, make sure
all bolts and nuts are properly tightened. Make
sure all cotter pins are spread and not damaged.
After operation of the grinder mixer for several
hours, make sure all bolts are set to proper torque.
Refer to the torque guide (see Table 1).

16 PREPAIRING THE GINDER MIXER FOR OPERATION
Size
Clamp
Load
Plain
GR 5
Plated
GR 5
1/4 –20 (.250)
2,025
8 ft. lbs.
76 in. lbs.
5/16 –18 (.3125)
3,338
17 ft. lbs
13 ft. lbs.
3/8 –16 (.375)
4,950
31 ft. lbs.
23 ft. lbs.
7/16 –14 (.4375)
6,788
50 ft. lbs.
37 ft. lbs.
1/2 –13 (.500)
9,075
76 ft. lbs.
57 ft. lbs.
9/16 –12 (.5625)
11,625
109 ft. lbs.
82 ft. lbs.
5/8 –11 (.625)
14,400
150 ft. lbs.
112 ft. lbs.
3/4 - 10 (.750)
21,300
266 ft. lbs.
200 ft. lbs.
7/8 –9 (.875)
29,475
430 ft. lbs.
322 ft. lbs.
1 –8 (1.00)
38,625
644 ft. lbs.
483 ft. lbs.
1-1/8 –7 (1.125)
42,375
794 ft. lbs.
596 ft. lbs.
Table 1 - Torque Specification Guide for Grade 5
Bolts.
Lubricate the grinder mixer at regular intervals as
instructed in the lubrication sections. (Refer to
LUBRICATION section.)
PREPARING THE TRACTOR
The tractor must be equipped with a 540 or 1000
RPM PTO to match the grinder mixer as described
in the previous section. Make sure the grinder
mixer and the tractor are equipped and set for the
proper RPM.
CAUTION: NEVER OPERATE A 540
RPM GRINDER MIXER WITH A 1000
RPM TRACTOR PTO.
TRACTOR HITCH
The hitch for the grinder mixer is designed to
attach to any SAE –ASAE standardized tractor
drawbar. Adjust the drawbar so it is 13 to 17
inches above the ground (see Figure 12). Extend
or shorten the tractor drawbar so the horizontal
distance from the end of the tractor PTO shaft to
the center of the hitch pin hole is 14 inches for 540
RPM and 16 inches for 1000 RPM drives.
Lock the drawbar in its crossbar, parallel with the
centerline of the PTO. Place locking pins on each
side of the drawbar. If the tractor has an offset
drawbar, the offset should be down for PTO work.
IMPORTANT: An improperly located hitch point
may cause damage to the universal joints (U-
Joints) of the PTO driveline.
Figure 12 - Hitch Point Locations
ATTACHING TO THE TRACTOR
NOTE: Height of the unloading auger tube needs
to be checked. Move the saddle on the side of the
mixing tank so the tube will properly clear the
tractor and cab.
Carefully back the tractor up to the hitch. Use the
crank of the jack to raise or lower the grinder mixer
hitch into position to engage the tractor drawbar.
Fasten the grinder mixer hitch to the drawbar with
a hitch pin that cannot bounce out. Raise the jack
and lock into the transport position (see Figure
13). Attach the safety chain from the grinder mixer
to the tractor (see Figure 14).
CAUTION: ALWAYS FOLLOW STATE
AND LOCAL REGULATIONS
REGARDING A SAFETY CHAIN WHEN
TOWING FARM EQUIPMENT ON
PUBLIC HIGHWAYS.
Figure 13 - Jack in Transport Position

PREPAIRING THE GRINDER MIXER FOR OPERATION 17
Figure 14 - Grinder Attached To The Tractor With
Safety Chain.
If the grinder mixer is equipped with an electronic
scale, plug the scale power supply cord into the
electrical outlet on the tractor or to the battery on
the mixer frame.
IMPORTANT: On electronic scale applications, if
a bolt and nut are used in place of a hitch pin, the
nut must not be tightened to where it hits against
the underside of the weigh bar clevis.
Connect the PTO driveline to the tractor PTO
shaft. The PTO operating speed of the tractor and
grinder mixer must be the same. The tractor half of
the PTO is equipped with 6-splines for 540 RPM
operation and 21-splines for 1000 RPM operation.
Plug 7-Pin connector for lights into tractor
receptacle.
If equipped with an electronic scale plug it into the
receptacle on tractor.
HAMMER MILL
Make sure the grinder mixer is equipped with a
1000 RPM drive when operating with a tractor
equipped with a 1000 RPM PTO drive. The
diameter of the pulley on the jackshaft must be 12-
5/16 inches for 1000 RPM operation in a hammer
mill application. The diameter of the pulley on the
jackshaft must be 22-5/8 inches for 540 RPM
operation in a hammer mill application (see Figure
15).
CAUTION: NEVER OPERATE A 540
RPM GRINDER MIXER WITH A 1000
RPM TRACTOR.
Figure 15 –Small Pulley - 1000 RPM (Shields
Removed For Clarity).
After connecting the PTO driveline to the tractor,
anchor the driveline implement shield chain,
located in the main shield base slot, and the
tractor shield chain to the tractor drawbar.
BEFORE GRINDING
New machines should be operated before
preparing feed. A few hundred pounds of coarse
material such as shelled corn or ground cobs
should be ran through the grinder mixer. This will
remove the protective oil coating from the mixer
cone and any metal particles that may be in the
machine. This will help polish the cone and
prevent bridging. After several minutes of running
the grinder mixer, unload the mixture and discard.
Do not feed this mixture to the livestock.
DETACHING FROM THE TRACTOR
CAUTION: MAKE SURE THE TRACTOR
IS SHUT OFF, REMOVE THE KEY AND
PLACE THE KEY IN YOUR POCKET.
Disconnect the PTO driveline and front shield
anchor chain from the tractor and place it on the
PTO driveline support bracket (see Figure 16).
The PTO driveline support should be tight enough
to remain in position when rotated from storage
against the frame to use position.
Disconnect the electronic scale power cord from
the tractor (if equipped).
Disconnect the hydraulic hoses from the tractor
outlets (if equipped with tractor hydraulic
functions).
Make sure the discharge auger and the auger
feeder are in their saddles before disconnecting.
Block the tires. Lower the jack stand to the ground.
Turn the handle of the jack stand to raise the
grinder mixer tongue off of the tractor hitch.
Remove the hitch pin and safety chain.
Figure 16 - PTO Support.
12-5/16”

18 OPERATION OF GRINDER MIXER
OPERATION OF GRINDER MIXER
TRACTOR PTO ENGAGEMENT
The mixer may be operated by engaging the PTO.
Always engage the tractor PTO with the tractor
engine at idle speed. After the PTO is engaged,
increase the engine speed gradually until the
desired operating speed is obtained. Reverse the
PTO engagement steps to disengage the PTO.
For smooth PTO operation and to help increase
the life of the PTO driveline, make sure the tractor
is aligned straight with the frame of the grinder
mixer whenever possible.
IMPORTANT: If mixing while in transport, avoid
sharp and unnecessary turns which may damage
the PTO driveline.
HAMMER MILL CLUTCH PIN
CAUTION: BEFORE CHANGING
POSITIONS OF THE CLUTCH PIN,
MAKE SURE THE TRACTOR IS SHUT
OFF AND PLACE THE KEY IN YOUR
POCKET.
The hammer mill clutch pin is located on the front
of the fly-wheel (see Figure 17). Make sure the
grinder mixer has come to a complete stop and
shut off the tractor before proceeding with the
next step. To engage the hammer mill, turn the
fly-wheel by hand to align one of the six slots in
the fly-wheel with the pin. Push in the pin and turn
1/4 turn in either direction to lock it in place. To
disengage the hammer mill, push in the pin, turn
1/4 turn, and release.
CAUTION: ALWAYS OPERATE PTO AT
THE SAME SPEED FOR WHICH THE
GRINDER MIXER IS EQUIPPED; 540 OR
1000 RPM. NOTE THE SPEED DECAL
ON THE FRONT SHIELD OF GRINDER
MIXER.
Figure 17 - Hammer mill Clutch Pin (Pin Disengaged
in Photo and Shields Removed for Clarity).
FEED GATE
A feed gate is provided in the mill throat with a
rubber baffle (removed for roll feed installation)
behind it (see Figure 18). The feed gate should be
set to the lowest possible position to allow material
to flow into the hammer mill evenly.
Figure 18 - Feed Gate at Throat of the Hammer mill.
HAY RETARD BOLTS
The hay retard bolts will help maintain uniform
feeding while grinding hay (see Figure 19). They
also hold a replaceable wear plate to the bottom of
the hammer mill throat with flanged lock nuts (see
Figure 18). The degree of the retard is adjusted by
loosening the lock nuts on each of the retard bolts
and the lock nuts securing the wear plate, turning
the bolts in (increase) or out (decrease) to the
desired position. Secure the bolts by tightening the
lock nuts. Make sure the nuts securing the wear
plate are also tightened.
Figure 19 - Hay Retard Bolts (A - Lock Nut; B -
Adjustable Retard Bolt, 26 Inch Hammer mill
Shown).
HAMMER MILL SCREENS
Hammer mill screens are available in sizes
ranging from 1/8 inch up to 2 inch openings. The
screen size needed will be determined by the
material and degree of fineness desired.
B
A