Roto-Mix 274-12 Guide

441903 01/2019Printed in U.S.A.
274-12, 274-12B
FEED MIXER
OPERATION AND PARTS MANUAL
ROTO-MIX
P.O. BOX 1724
2205 E. Wyatt Earp Blvd.
Dodge City, Kansas 67801
[phone]
© ROTO-MIX 2006

2
TABLE OF CONTENTS
PAGE NO.
WARRANTY ................................................................................................................. 3
SCALES WARRANTY & SERVICE POLICY .............................................................. 4
OPERATOR QUALIFICATIONS .................................................................................. 5
SAFETY INFORMATION ............................................................................................6-15
OPERATION ...............................................................................................................16-23
LUBRICATION CHART .............................................................................................. 24
274-12 SPECIFICATIONS .......................................................................................... 25
274-12 PTO CHART .................................................................................................... 26
274-12 STATIONARY DIMENSIONS........................................................................ 27-29
274-12 TRAILER DIMENSIONS ................................................................................. 30
274-12 TRAILER DIMENSIONS (W / CONVEYOR) ................................................... 31
274-12 TRUCK MOUNTING DIMENSIONS ................................................................ 32
PARTS TABLE OF CONTENTS .................................................................................. 33

3
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 author-
ized to handle the equipment covered by this warranty or at a ROTO-MIX facility, 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 indi-
rect 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.
If ROTO─MIX, or its duly authorized representative, shall find that such returned part or parts are defective
and such defects, or defect, are included in and covered by said warranty, then such defective part or parts
shall promptly be replaced without charge to the purchaser, F.O.B. the ROTO─MIX plant.
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 within 10 days of purchase and be re-
corded 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 instruc-
tions 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 Opera-
tors Manual. If a defect in materials or workmanship occurs, it is the customer’s responsibility to cease oper-
ating 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
-The use of PTO Shaft
Adaptors
-Usage contrary to the
intended purpose of the
product
Warranty continues on the next page.

4
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 Atkinson, 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.
Limited Warranty Statement continued
This Warranty does not cover replacement of Wear or Maintenance Items including, but not limited to.
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
-ROTO-MIX is not responsible and will not be liable for damage caused to persons or property, commercial
loss, loss of time or production, loss of use by reason of the installation or use of ROTO-MIX products or
their mechanical failure.
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]
-Lubricants
-Filters
-Hoses
-Tires
-Augers
-Wipers
-Chains
-Idlers
-Batteries
-Blades
-Belts

5
OPERATOR QUALIFICATIONS
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.
SAFETY
READ BEFORE
YOU FEED
SAFETY
READ BEFORE
YOU FEED
SAFETY
READ BEFORE
YOU FEED

6
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 INSTRUCTIONS 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

7
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.
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.
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.
BEFORE STARTING TRACTOR ENGINE, BE SURE PTO SHIELDS TURN
FREELY.
LOOSE OR FLOPPY CLOTHING SHOULD NOT BE WORN BY THE
OPERATOR.
OPERATING PRECAUTIONS & INSTRUCTIONS:

8
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 machinery and trained
in this equipment’s operations. Do not allow persons to operate or assemble this
unit until they have read this manual and have developed a thorough understanding
of the safety precautions and of how it works.
To prevent injury or death, use a tractor equipped with a Roll Over Protective
System (ROPS). Do not paint over, remove or deface any safety signs or warning
decals on your equipment. Observe all safety signs and practice the instructions on
them.
Never exceed the limits of a piece of machinery. in its ability to do a job, or to do so
safely, is in question - DON’T TRY IT.
LIGHTING AND MARKING
It is the responsibility of the customer to know the lighting and marking
requirements of the local highway authorities and to install and maintain the
equipment to provide compliance with the regulations. Add extra lights when
transporting at night or during periods of limited visibility.
SAFETY
READ BEFORE
YOU FEED

9
KEEP ALL SHIELDS IN PLACE
Do not operate mixer/feeder without safety shields in place.
Rotating parts can crush or dismember causing personal injury
or death.
Disconnect PTO driveline before removing shields for
adjustment or service.
OPERATE MIXER/FEEDER SAFELY
Rotating parts can entangle or strike people, resulting in
personal injury or death.
Never enter a mixer/feeder while in operation.
Operate the mixer/feeder from the operator’s seat only.
Do not exceed load capacity of the mixer/feeder. (See loading
instructions).
Reduce speed when turning or traveling on rough terrain.
Avoid traveling over loose fill, rocks, ditches or holes.
Keep transmissions in gear when traveling downhill.
KEEP RIDERS OFF MIXER/FEEDER
Keep riders off.
Riders are subject to injury such as being struck by
foreign objects and being thrown off. Riders also
obstruct the operator’s view resulting in the machine
being operated in an unsafe manner.
SAFETY
READ BEFORE
YOU FEED

10
STAY CLEAR OF ROTATING DRIVELINES
Entanglement in rotating driveline can cause serious injury or
death.
Keep tractor master shield and driveline shields in place at all
times. Make sure rotating shields turn freely.
Wear close fitting clothing. Stop the engine and be sure PTO
driveline is stopped before making adjustments, connections,
or cleaning out PTO driven equipment .
PREVENT BATTERY EXPLOSIONS
Keep sparks, lighted matches, and open flame away from the
top of battery. Battery gas can explode.
Never check battery charge by placing a metal object across
the posts. Use a volt-meter or hydrometer.
Do not charge a frozen battery; it may explode. Warm battery
to 16C (60F)
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.
SAFETY
READ BEFORE
YOU FEED

11
PREPARING TRACTOR FOR TRAILER MIXER
POSITIONING DRAWBAR
IMPORTANT: Drive components can be damaged from
excessive speed. Under no circumstances
should a feed mixer equipped with 540
RPM be operated by a tractor with 1000
RPM PTO.
Feed mixers are available with either 540 or 1000 RPM
driveline. Match tractor PTO with the feed mixer
driveline.
IMPORTANT: To prevent driveline damage, adjust
tractor drawbar to recommended setting.
Disengage tractor PTO before turning.
Remove clevis if equipped. Turn offset drawbar down.
Adjust drawbar length:
PTO SPEED DIMENSION (A)
540 RPM 14 inches (356 mm)
1000 RPM 16 inches (406 mm)
ADJUST TRAILER HITCH CLEVIS
Mixer should be approximately level when attached to
tractor.
Adjust clevis by changing hole location on tongue.
Hitch Pin Size --- 1” x 7”
SAFETY
READ BEFORE
YOU FEED

12
SAFETY SIGNS
PATENT PENDING
PATENT PENDING

13
SAFETY SIGNS

14
SAFETY SIGNS

15
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.
SAFETY
READ BEFORE
YOU FEED

16
REMEMBER
Your best assurance against accidents is a careful and responsible operator. If
there is any portion of this manual or function you do not understand, contact
your dealer or the ROTO-MIX plant.
BEFORE OPERATION:
Carefully study and understand this manual.
Do not wear loose-fitting clothing which may catch in moving parts.
Always wear protective clothing and substantial shoes.
Keep wheel lug nuts or bolts tightened to specified torque.
Assure that agricultural implement tires are inflated evenly.
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.
Be sure that there are no tools lying on or in the mixer/feeder.
Do not use the unit until you are sure that the area is clear, especially children and
animals.
Because it is possible that this mixer/feeder may be used in dry areas or the presence
of combustibles, special precautions should be taken to prevent fires and fire
fighting equipment should be readily available.
Don’t hurry the learning process or take the unit for granted. Ease into it and
become familiar with your new mixer/feeder.
Practice operation of your mixer/feeder and its attachments. Completely familiarize
yourself and other operators with its operation before using.
Securely attach to towing unit. Use a high strength, appropriately sized hitch pin
with a mechanical retainer.
Do not allow anyone to stand between the tongue or hitch and the towing vehicle
when backing up to the mixer/feeder.
SAFETY
READ BEFORE
YOU FEED

17
DURING OPERATION:
Beware of bystanders, particularly children! Always look around to make sure
that it is safe to start the engine of the towing vehicle or move the unit. This is
particularly important with higher noise levels and quiet cabs, as you may not hear
people shouting.
NO PASSENGERS ALLOWED - Do not carry passengers anywhere on, or in, the
tractor or equipment, except as required for operation.
Keep hands and clothing clear of moving parts.
Do not clean, lubricate or adjust your mixer/feeder while it is moving.
Be especially observant of the operating area and terrain - watch for holes, rocks or
other hidden hazards. Always inspect the area prior to operation.
Do not operate near the edge of drop-offs or banks.
Do not operate on steep slopes as overturn may result.
Operate up and down (not across) intermediate slopes. Avoid sudden starts and
stops.
Pick the levelest possible route when transporting across fields. Avoid the edges of
ditches or gullies and steep hillsides.
Be extra careful when working on inclines.
Periodically clear the equipment of brush, twigs or other materials to prevent
buildup of dry combustible materials.
Maneuver the tractor or towing vehicle at safe speeds.
Avoid overhead wires or other obstacles. Contact with overhead lines could cause
serious injury or death.
Avoid loose fill, rocks and holes; they can be dangerous for equipment operation or
movement. Allow for unit length when making turns.
Do not walk or work under raised components or attachments unless securely
positioned and blocked.
Keep all bystanders, pets and livestock clear of the work area.
Operate the towing vehicle from the operator’s seat only.
Never stand alongside of the unit with engine running. Never attempt to start engine
and/or operate machine while standing alongside of unit.
SAFETY
READ BEFORE
YOU FEED

18
DURING OPERATION (CONT.)
Never leave running mixer/feeder unattended.
As a precaution, always recheck the hardware on mixer/feeder following every 100
hours of operation. Correct all problems. Follow the maintenance safety
procedures.
FOLLOWING OPERATION:
Following operation, or when unhitching, stop the tractor or towing vehicle, set the
brakes, disengage the PTO and all power drives, shut off the engine and remove the
ignition keys.
Store the unit in an area away from human activity.
Do not park equipment where it will be exposed to livestock for long periods of
time. Damage and livestock injury could result.
Do not permit children to play on or around the stored unit.
Make sure parked machine is on a hard, level surface and engage all safety devices.
Wheel chocks may be needed to prevent unit from rolling.
HIGHWAY AND TRANSPORT OPERATIONS:
Adopt safe driving practices:
Keep the brake pedals latched together at all times. Never use independent
braking with machine in tow as loss of control and/or upset of unit can
result.
Always drive at a safe speed relative to local conditions and ensure that your
speed is low enough for an emergency stop to be safe and secure. Deep speed to
a minimum.
Reduce speed prior to turns to avoid the risk of overturning.
Avoid sudden uphill turns on steep slopes.
Always keep the tractor or towing vehicle in gear to provide engine braking
when going downhill. Do not coast.
Do not drink and drive.
SAFETY
READ BEFORE
YOU FEED

19
HIGHWAY AND TRANSPORT OPERATIONS (CONT.):
Comply with state and local laws governing highway safety and movement of farm
machinery on public roads.
Use approved accessory lighting flags and necessary warning devices to protect
operators of other vehicles on the highway during daylight and nighttime transport.
The use of flashing amber lights is acceptable in most localities. However, some
localities prohibit their use. Local laws should be checked for all highway lighting
and marking requirements.
When driving the tractor and mixer/feeder on the road or highway under 20 MPH
(40 KPH) at night or during the day, use flashing amber warning lights and a slow
moving vehicle (SMV) identification emblem.
Plan your route to avoid heavy traffic.
Be a safe courteous driver. Always yield to oncoming traffic in all situations,
including narrow bridges, intersections, etc.
Be observant of bridge loading ratings. Do not cross bridges rated lower than he
gross weight at which you are operating.
Watch for obstructions overhead and to the side while transporting.
Always operate mixer/feeder in a position to provide maximum visibility at all
times. Make allowances for increased length and weight of the mixer/feeder when
making turns, stopping the unit, etc.
PERFORMING MAINTENANCE:
Good maintenance is your responsibility. Poor maintenance is an invitation to
trouble.
Make sure there is plenty of ventilation. Never operate the engine of the towing
vehicle in a closed building. The exhaust fumes may cause asphyxiation.
Before working on the mixer/feeder, stop the towing vehicle, set the brakes,
disengage the PTO and all power drives, shut off the engine and remove the ignition
keys.
Be certain all moving parts on attachments have come to a complete stop before
attempting to perform maintenance.
Always use a safety support and block the wheels. Never use a jack to support the
machine.
SAFETY
READ BEFORE
YOU FEED

20
PERFORMING MAINTENANCE (CONT.):
Always use the proper tools or equipment for the job at hand.
Use extreme caution when making adjustments.
Never use our 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.
A fire extinguisher and first aid kit should be kept readily accessible while
performing maintenance on this mixer/feeder.
SAFETY
READ BEFORE
YOU FEED