Roto-Mix VXT 325 Guide

VXT 325 STATIONARY
OPERATION AND PARTS
MANUAL
ROTO-MIX LLC
P.O. BOX 1724
2205 E. Wyatt Earp Blvd.
Dodge City, Kansas 67801
[phone]
© ROTO-MIX LLC 2006
SERIAL NUMBER_________________
441934 02/2019 Printed in U.S.A.

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TABLE OF CONTENTS
PAGE NO.
WARRANTY ..........................................................................................................4
SCALES WARRANTY & SERVICE POLICY ........................................................5
INTRODUCTION....................................................................................................6
OPERATOR QUALIFICATIONS ...........................................................................7
SAFETY .............................................................................................................. 8-13
SAFETY DECALS ................................................................................................14
PRE-OPERATION ................................................................................................15
LOADING INSTRUCTIONS & PRECAUTIONS ...................................................16
MAINTENANCE....................................................................................................17
V-BELT TENSIONING INSTRUCTIONS ..............................................................18
LUBRICATION .....................................................................................................19
TROUBLE SHOOTING.........................................................................................20
FEATURES & SPECIFICATIONS ........................................................................21
DIMENSIONS .......................................................................................................22
REPAIR PARTS TABLE OF CONTENTS ............................................................23

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Limited Warranty Statement
ROTO-MIX LLC warrants to the original purchaser all products manufactured by it to be free from defects in material and
workmanship under normal use and service.
ROTO-MIX’s obligation under this warranty is limited to repairing or replacing, as the company may elect, free of charge
and without charge for installation, at the place of business of a dealer or distributor authorized to handle the equipment
covered by this warranty or at a ROTO-MIX plant, any parts that prove, in the company’s judgment, to be defective in
material or workmanship within one (1) year after delivery to the original purchaser, and still owned by the original
purchaser. This warranty shall in no way make ROTO-MIX liable to anyone for personal injuries or damages, loss of
time, or expense of any kind either direct or indirect resulting from part failure or defect. This warranty is subject to acts of
God, fire and existing conditions of supply and demand, or production, or ability or inability to deliver, or for any other valid
reason beyond the reasonable control of ROTO-MIX, to obtain materials, manufactured replacement parts, or make
delivery thereof. No distributor, dealer, agent, or ROTO-MIX employee (other than the CEO or President in writing) is
authorized to extend any other or further express or implied warranty or incur any additional obligation on ROTO-MIX’s
behalf in connection with the sale of this product.
Customer Responsibility
Product Registration - It is a condition of this warranty that the original purchaser must fill out the warranty card
furnished by ROTO-MIX and that it be returned to ROTO-MIX and be recorded in ROTO-MIX’s owner file for this warranty
to be valid. In the event an owner’s card is not on file at the ROTO-MIX office, the warranty period will extend only from
date equipment was picked up or shipped from the ROTO-MIX plant.
Maintenance - It is the customer’s responsibility to maintain their equipment in accordance with the instructions provided
in the Operator’s Manual. ROTO-MIX recommends that you keep records and receipts; you may be asked to prove that
maintenance instructions have been followed.
Operation –It is the customer’s responsibility to operate the equipment only for the purpose for which it was designed
and in accordance with all safety and operational recommendations contained in the Operators Manual. If a defect in
materials or workmanship occurs, it is the customer’s responsibility to cease operating the equipment until authorized
repairs are made. Damage, which occurs from continued operation, may not be covered by this warranty.
What this Warranty Covers
This warranty covers failures caused by defects in materials or workmanship only.
This Warranty does not cover failures caused by:
 Improper operation
 Natural calamities
 Unauthorized modifications
 Unauthorized repairs
 Use of Non ROTO-MIX parts
 Neglected maintenance
 Usage contrary to the
intended purpose of the
product
This Warranty does not cover replacement of Wear or Maintenance Items (unless defective) including, but not limited to.
 Lubricants
 Filters
 Hoses
 Tires
 Augers
 Wipers
 Blades
 Belts
 Chains
 Idlers
This Warranty does not cover:
Pickup and delivery of the equipment
Service Calls or Travel Time to and from sites
Rental of replacement equipment during repair period
Products that have been declared a total loss and subsequently salvaged
Overtime labor charges
Right to Make Changes
ROTO-MIX reserves the right to make any changes to a ROTO-MIX product at any time without incurring any obligation
with respect to any product previously ordered, sold or shipped, with or without notice.
Parts Warranty
ROTO-MIX warranties replacement parts against defects in materials or workmanship for a period of 90 days or the
remainder of the product warranty, whichever is longer. Remedy for defective replacement parts for units that are beyond
the original product warranty, will be limited to replacement of the failed part. Failures that are due to damage, improper
installation, lack of maintenance or improper operation will not be covered.
ROTO-MIX 2205 East Wyatt Earp Blvd., Dodge City, KS 67801 [phone] Fax: [phone]

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SCALES WARRANTY & SERVICE POLICY
DIGI-STAR SCALE SYSTEMS
Digi-Star, LLC warrants for a period of one year from date of installation, to correct
by repair or replacement, at Digi-Star’s option, any defect in material or workmanship in any
part of this product. In the event of replacement, Digi-Star’s sole obligation shall be to
provide replacement products or parts. F.O.B. Digi-Star, LLC, W5527 Hwy 106, Fort Atkin-
son, WI 53538 USA.
WEIGH-TRONIX SCALE SYSTEMS
WEIGH-TRONIX warrants for a period of one year from date of installation, to
correct by repair or replacement, at Weigh-Tronix’s option, any defect in material or
workmanship in any part of this product. In the event of replacement, Weigh-Tronix’s sole
obligation shall be to provide replacement products or parts. F.O.B. Avery Weigh-Tronix,
1000 Armstrong Drive, Fairmont, MN 56031-1439 USA.

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Congratulations on the purchase of your new Vertical Mixer from ROTO-MIX. With proper
operation and preventative maintenance it will last for years.
This SAFETY ALERT SYMBOL indicates important safety messages in the
manual. When you see this symbol, be alert to the possibility of PERSONAL
INJURY and carefully read the message that follows.
NEVER OPERATE WITHOUT ALL COVERS, SHIELDS AND GUARDS IN
PLACE. KEEP HANDS, FEET AND CLOTHING AWAY FROM MOVING
PARTS.
Some covers and guards have been removed for illustrative/photographic purposes only
in this manual. However, equipment should never be operated in this condition. Keep all
shields in place. If shield removal becomes necessary for repairs, replace the shield prior
to use.
The Guarantee appears in the front of this book along with the Registration and Inspection
Certificate.
For information on ordering repair parts, refer to the Repair Parts section at the back of
this book.
The serial number plate is located on the drivers side lower front of the main frame. This
number should be recorded on the Registration and Inspection Certificate for your
reference and for proper identification of your mixer by ROTO-MIX.
You are urged to study this manual and follow the instructions carefully. Your efforts will
be repaid in better operation and service as well as a savings in time and repair expense.
Failure to read this manual and understand the safe operation of the mixer could lead to
serious injury.
If you do not understand the instructions in this manual contact either your dealer or
ROTO-MIX at Dodge City, Kansas 67801.
This supersedes all previous published instructions.
INTRODUCTION

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Operation of this mixer/feeder shall be limited to competent and experienced
persons. In addition, anyone who will operate or work around a mixer/feeder must use
good common sense. In order to be qualified, he or she must also know and meet all
other qualifications, such as:
1. Some regulations specify that no one under the age of sixteen (16) may operate
power machinery. It is your responsibility to know what these regulations are in
your area and/or situation.
2. Current OSHA regulations state in part: At the time of initial assignment and at
least annually thereafter, the employer shall instruct EVERY employee in the
safe operation and servicing of all equipment with which the employee is, or will
be involved.
3. Unqualified persons are to STAY OUT OF THE WORK AREA.
4. A person who has not read and understood all operating and safety instructions
is not qualified to operate the machinery.
FAILURE TO READ THIS MIXER/FEEDER MANUAL AND ITS SAFETY
INSTRUCTIONS IS A MISUSE OF THE EQUIPMENT.
OPERATOR QUALIFICATIONS
S A F E T Y
R E A D B E F O R E
Y O U F E E D
S A F E T Y
R E A D B E F O R E
Y O U F E E D
S A F E T Y
R E A D B E F O R E
Y O U F E E D

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SAFETY
TAKE NOTE! THIS SAFETY ALERT SYMBOL FOUND THROUGHOUT THIS MANUAL
IS USED TO CALL YOUR ATTENTION TO INSTRUCTIONS INVOLVING YOUR
PERSONAL SAFETY AND THE SAFETY OF OTHERS. FAILURE TO FOLLOW THESE
ISTRUCTIONS CAN RESULT IN INJURY OR DEATH.
THIS SYMBOL MEANS
-ATTENTION!
-BECOME ALERT!
-YOUR SAFETY IS INVOLVED!
SIGNAL WORDS: Note the use of the signal words DANGER, WARNING, and CAUTION
with the safety messages. The appropriate signal word for each has been selected using
the following guidelines:
DANGER: Indicates an imminently hazardous situation that, if not avoided, will
result in serious injury or death. This signal word is to be limited to the most
extreme situations typically for machine components which, for functional purposes,
cannot be guarded.
WARNING: Indicates a potentially hazardous situation that, if not avoided, will
result in serious injury or death, and includes hazards that are exposed when
guards are removed. It may also be used to alert against unsafe practices.
CAUTION: Indicates a potentially hazardous situation that, if not avoided, may
result in minor or moderate injury. It may also be used to alert against unsafe
practices.
If you have questions not answered in this manual or require additional copies or the
manual is damaged, please contact your dealer or ROTO-MIX, 2205 E. Wyatt Earp,
Dodge City, Kansas, 67801. (Telephone) 620-225-1142 (Fax) 620-225-6370

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OPERATING PRECAUTIONS & INSTRUCTIONS
A. Check to see that no obstructions are present in the mixer prior to start up.
B. Before loading, run the mixer empty and check all operations.
C. Do not overload the mixer, as the mixing efficiency may be reduced and unit
damage may occur. (See loading instructions).
D. Remove all moisture drain plugs if the mixer is going to set in the rain or snow.
E. Be sure all shields are in place before operation.
F. Use common sense when operating.
SAFETY FIRST
REMEMBER: The careful operator is the best operator. Most accidents are caused by
human error. Certain precautions must be observed to prevent the possibility of injury or
death.
DO NOT ALLOW PERSONNEL OTHER THAN THE QUALIFIED OPERATOR
NEAR THE MACHINE.
NEVER START MACHINE UNTIL ALL GUARDS AND SAFETY SHIELDS ARE
IN PLACE.
DO NOT CLEAN, ADJUST OR LUBRICATE THE MACHINE WHILE IT IS IN
MOTION.
LOOSE OR FLOPPY CLOTHING SHOULD NOT BE WORN BY THE
OPERATOR.

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EQUIPMENT SAFETY GUIDELINES
Safety of the operator is one of the main concerns in designing and developing a new
piece of equipment. Designers and manufactures build in as many safety features as
possible. However, every year many accidents occur which could have been avoided by a
few seconds of thought and a more careful approach to handling equipment. You, the
operator, can avoid many accidents by observing the following precautions in this section.
To avoid personal injury, study the following precautions and insist those working with you,
or for you, follow them.
In order to provide a better view, certain photographs or illustrations in this manual may
show an assembly with a safety shield removed. However, equipment should never be
operated in this condition. Keep all shields in place. If shield removal becomes necessary
for repairs, replace the shield prior to use.
Replace any CAUTION, WARNING, DANGER or instruction safety decal that is not
readable or is missing. Location of such decals are indicated in this manual.
Do not attempt to operate this equipment under the influence of drugs or alcohol.
Review the safety instructions with all users annually.
This equipment is dangerous to children and persons unfamiliar with its operation. The
operator should be a responsible adult familiar with farm and industrial machinery and
trained in this equipment’s operations. Do not allow persons to operate or assemble this
until they have read this manual and have developed a thorough understanding of the
safety precautions and of how it works.

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S A F E T Y
R E A D B E F O R E
Y O U F E E D
KEEP ALL SHIELDS IN PLACE
Do not operate mixer without safety shields in place.
Rotating parts can crush or dismember causing personal
injury or death.
OPERATE MIXER/FEEDER SAFELY
Rotating parts can entangle or strike people, resulting in
personal injury or death.
Never enter a mixer while in operation.
Operate the mixer from a safe distance.
AVOID HIGH-PRESSURE FLUIDS
Escaping fluid under pressure can penetrate the skin
causing serious injury or death.
Avoid the hazard relieving pressure before disconnecting
hydraulic or other lines. Tighten all connections before
applying pressure.
Search for leaks with a piece of cardboard. Protect hands
and body from high pressure fluids.
If an accident occurs, see a doctor immediately. Any fluid
injected into the skin must be surgically removed within a
few hours or gangrene may result. Doctors unfamiliar with
this type of injury should reference a knowledgeable medical
source.

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S A F E T Y
R E A D B E F O R E
Y O U F E E D
SAFETY DECAL CARE
Keep safety decals and signs clean and legible at all times.
Replace safety decals and signs that are missing or have become illegible.
Replaced parts that displayed a safety sign should also display the current sign.
Safety decals or signs are available from your dealer or the ROTO-MIX
manufacturing plant.
How to Install Safety Decals:
Be sure that the installation area is clean and dry.
Decide on the exact position before you remove the backing paper.
Remove the smallest portion of the split backing paper.
Align the decal over the specified area and carefully press the small portion with
the exposed sticky backing in place.
Slowly peel back the remaining paper and carefully smooth the remaining
portion of the decal in place.
Small air pockets can be pierced with a pin and smoothed out using the piece of
decal backing paper.
PRACTICE FIRE PREVENTION
Keep fire extinguishers accessible at all times. Use the extinguisher
recommended for the material being processed. It should be rated safe for use
on electrical fires.
Never smoke close to combustible material.
Clean the area before welding or other activities which may make sparks.
Keep all components that generate excessive heat clear of oil and other
combustible materials.

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PERFORMING MAINTENANCE:
Good maintenance is your responsibility. Poor maintenance is an invitation to
trouble.
Be certain all moving parts and attachments have come to a complete stop
before attempting to perform maintenance.
Always use a safety support and block the machine. Never use a jack to
support the machine.
Always use the proper tools or equipment for the job at hand.
Use extreme caution when making adjustments.
Never use your hands to locate hydraulic leaks on attachments. Use a small
piece of cardboard or wood. Hydraulic fluid escaping under pressure can
penetrate the skin.
When disconnecting hydraulic lines, shut off hydraulic supply and relieve all
hydraulic pressure.
Openings in the skin and minor cuts are susceptible to infection from hydraulic
fluid. If injured by escaping hydraulic fluid, see a doctor at once. Gangrene can
result. Without immediate treatment, serious infection and reactions can occur.
Replace all shields and guards after servicing and before moving.
After servicing, be sure all tools, parts and service equipment are removed.
Do not allow grease or oil to build up on any step or platform.
Never replace hex bolts with less than grade five (5) bolts unless otherwise
specified.
Where replacement parts are necessary for periodic maintenance and servicing,
genuine factory replacement parts must be used to restore your equipment to
original specifications. ROTO-MIX will not claim responsibility for use of
unapproved parts and/or accessories and other damages as a result of their
use.
If equipment has been altered in any way from original design, ROTO-MIX does
not accept any liability for injury or warranty.
S A F E T Y
R E A D B E F O R E
Y O U F E E D

440827 440827
440826
440833
#440827
#440833
#440826
SAFETY DECALS
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PRE-OPERATION
PRE OPERATION CHECK LIST
1. Carefully study and understand this manual.
2. Do not wear loose fitting clothing which may catch in moving parts.
3. Always wear protective clothing and substantial shoes.
4. Give the unit a visual inspection for any loose bolts, worn parts or cracked welds, and
make necessary repairs. Follow the maintenance safety instructions included in this
manual.
5. Be sure that there are no tools lying on or in the mixer.
6. Do not use the unit until you are sure that the area is clear, especially of children and
animals.
7. Because it is possible that this mixer may be used in dry areas or in the presence of
combustibles, special precautions should be taken to prevent fires and fire fighting
equipments should be readily available.
8. Don’t hurry the learning process or take the unit for granted. Ease into it and become
familiar with your new mixer.
9. Practice operation of your mixer and its attachments. Completely familiarize yourself
and other operators with its operation before using.
MAINTENANCE
ALWAYS DISCONNECT OR DISENGAGE POWER BEFORE CLEANING, ADJUSTING,
LUBRICATION OR SERVICING THIS MACHINE. FAILURE TO HEED MAY RESULT IN
SERIOUS PERSONAL INJURY OR DEATH.
READ THE FOLLOWING BEFORE WELDING ON THIS MIXER/FEEDER
When welding on your mixer, do not allow the current to flow through the bearings or the
roller chains. Ground directly to the item being welded.
Always disconnect the scale instrumentation from the weigh bars or load cells and the
power source. Be sure the current does not pass through weigh bars or load cells or
scale indicator.

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LOADING INSTRUCTIONS & PRECAUTIONS
A. Visually inspect mixer before each load.
B. Do not overload the mixer. Mixer capacity is determined by weight. An overloaded mixer
will not mix correctly, and will pull harder.
C. Load hay first with machine running.
1. Low speed, 10 RPM is preferable if you are using very tender, very fine stemmed
hay that breaks apart very easily. A slower speed allows maximum staple length.
2. Increase the speed to 17 RPM if you are using fine stemmed hay. Staple length
when using this speed will be longer than 10 RPM, but shorter than 26 RPM.
3. Increase to 26 RPM if you are using normal good quality hay. This
is the most common loading speed, for most conditions.
4. Full 36 RPM is used with very rough, course hay that needs to be
cut shorter to increase palatability.
Adjust restrictor plates (dogs) to fine tune length of cut. Always
start with one dog, preferably the one furthest away from the
discharge door, engage one hole and increase until length of cut is
correct. NOTE: engaging dogs and excessive amount will cause
mix quality to deteriorate and consume more power.
D. Add balance of grain and/or commodities, keeping more fragile ingredients toward the
end of the loading sequence as possible. For best results, add concentrates or other dry
ingredients of small quantity as close to the middle of the loading sequence as possible.
E. Load silage, green chop and/or other high moisture products.
F. Load molasses, animal fat, and/or other liquid supplements last.
G. Allow mixer three to four minutes to complete mixing after last ingredient is added.
(NOTE: this time will vary, and could be longer under certain conditions.)
H. View mixing operation only from observation platform of mixer. Never allow more than
two people on platform at one time.
I. For best results, off load mixed feed with the door as open as possible to ensure even
feed flow and clean out.
HAY PREPARATION:
SMALL BALES (60 to 150 lbs., 2 or 3 wire), LARGE SQUARE BALES (3’ x 4’ x 8’ or 4’ x 4’
x 8’) and ROUND BALES. Remove all twine, wire and/or wrapping and load bale in mixer.

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MAINTENANCE
READ THE FOLLOWING BEFORE WELDING ON THIS MIXER
ALWAYS DISCONNECT OR DISENGAGE BEFORE CLEANING, ADJUSTING, LUBRICATING
OR SERVICING THIS MACHINE. FAILURE TO HEED MAY RESULT IN SERIOUS PERSONAL
INJURY OR DEATH.
When welding on your mixer, do not allow the current to flow through the bearings. Ground
directly to the item being welded. Always disconnect the scale instrumentation from the weigh
bars and the power source. Be sure the current does not pass through weigh bars or scale
indicator.
DRIVE CHAIN ADJUSTMENT INSTRUCTIONS
The chain tension adjustment should be checked regularly, when the mixer is serviced. The
washer (#2) should be adjusted so that it is 5/8" from the spring guide (#1), or at the end of the
spring guide which is 5/8". When this spring (#3) is adjusted to 5/8" the drive chains should have
the correct tension and when the chains are lubricated correctly the chains and sprockets will last
longer. This adjustment should be maintained at locations on both sides of the mixer.

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Standard V-Belt Tensioning Deflection Force (Per Single Belt)
Note: The force in the table above is shown per a single rib v-belt, for banded v-belts such
as for a 2-rib v-belt you must multiply the force in the table for a single v-belt by 2 and for a
3-rib v-belt you must multiply the force in the table for a single v-belt by 3 and so on.
Belt
Cross-Section
Smaller Pulley
Diameter Range (in.)
Deflection Force
Run-in (lbs.)
(New Belt)
Normal (lbs.)
(Used Belt)
3VX 2.20 - 3.65 7 5
4.12 - 10.6 8 6
5VX 4.40 - 10.9 18 10 - 14
11.8 - 16.0 22 12 - 18
V-BELT TENSIONING INSTRUCTIONS
V-belt tensioning adjustment can be made using a tension meter or other type spring
scale, using the following procedure. After seating the belts in the groove and adjusting
center distance so as to take up slack in the belts, further increase the tension until only a
slight bow on the slack side is apparent while the drive is operating under load. Stop the
drive, and using the meter, measure the force necessary to depress one of the center
belts 1/64-inch for every inch of belt span (see sketch below). For example, a deflection
for a 50-inch belt span is 50/64ths, or 25/32-inch. The amount of force required to deflect
the belt should compare with the deflection forces noted in the chart on this page. Also
notice for V-belts that deflection forces vary from the initial “run-in” values which are
greater (reflecting higher run-in tensioning) to the “normal” values for after the run-in
period.
MEASURE THE SPAN LENGTH "T" AS SHOWN IN THE SKETCH ABOVE.

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LUBRICATION
DISENGAGE PTO & SHUT OFF POWER BEFORE LUBRICATING THE MACHINE.
LOOSE OR FLOPPY CLOTHING SHOULD NOT BE WORN BY THE OPERATOR.
PTO SHAFTS & U-JOINTS: Grease every 10 to 20 hours.
GEARBOXS: After the first 100 hours of operation, drain initial oil, preferably when box
is warm. Flush out the gear case with an approved non-flammable, non toxic solvent and
refill with oil.
Thereafter oil should be changed every 12 months when the machine is in moderate use. If
machine usage is severe or more than 10 loads per day, it is advisable to change the oil
every 6 months.
Inspect and wash oil reservoir breather cap as needed. Air dry before reinstalling.
Fill each gearbox with Synthetic Gear Lube 75W-90.
GEARBOX TEMPERATURES: During normal running conditions, the temperature of the
outer casing of the gearbox should not exceed 175ºF (80ºC).
RECOMMENDATION: It is advisable to check the oil level of gearboxes at least once a
month. If more than 10% of the total oil capacity has to be added, check for oil leaks.
LUBRICATION CHART
ALWAYS DISCONNECT OR DISENGAGE POWER BEFORE ADJUSTING,
LUBRICATION OR SERVICING THIS MACHINE. FAILURE TO HEED MAY RESULT IN
SERIOUS PERSONAL INJURY OR DEATH.
ITEM LUBRICATION INTERVAL
U-Joint Good Quality Grease Every 8 hours
Gearbox Synthetic Gear Lube 75W-90 After the first 500 hours of operation,
then 2000 hours or every 12 months,
whichever comes first.

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TROUBLE SHOOTING
ALWAYS DISCONNECT OR DISENGAGE POWER BEFORE CLEANING,
ADJUSTING, LUBRICATING OR SERVICING THIS MACHINE. FAILURE TO FOLLOW
THIS RECOMMENDATION MAY RESULT IN SERIOUS PERSONAL INJURY OR
DEATH.
NOTE: THIS CHART DOES NOT COVER ALL PROBLEMS. CONTACT YOUR
DEALERSHIP FOR FURTHER ASSISTANCE.
PROBLEM POSSIBLE CAUSE POSSIBLE REMEDY
Machine Vibration Universal Joints Are Out Of
Alignment. Check And Realign.
Worn Out Bearing. Replace Bearing.
Excessive Bearing Failure Improper Lubrication Refer To Lubrication Chart.
Contamination Check Seal
Excessive Loads. Refer To General
Information About Machine
Loading.
Mixing quality poor, not
thorough. Batch has high concentration of light weight ingredients
and rotates too fast inside
tub for thorough mixing.
Extend restrictor plates
(dogs) further into tub as
instructed on page 20.
High concentration of long
hay, not being torn apart. Extend restrictor plates (dogs) further into tub as
instructed on page 16.
Hay being added to batch,
but not being incorporated
into mixture.
Hay not getting shredded by
mixing action, batch rotating
inside tub too fast.
Extend restrictor plates
(dogs) further into tub as
instructed on page 16.
Too much power being
consumed to mix. Restrictor plates extend too far into tub and retarding
rotation of batch.
Move restrictor plates (dogs)
away from tub as instructed
on page 16.