Kubota AP-CB2568 User manual

Table of Contents
Cover photo may show optional equipment not supplied
with standard unit.
For an Operator’s Manual and Decal Kit in French
Language, please see your Kubota dealer.
Read the Operator’s Manual entirely. When you see this symbol,
the subsequent instructions and warnings are serious - follow
without exception. Your life and the lives of others depend on it!
!
39594
4-in-1 Combo Buckets
AP-CB2568, AP-CB2574, & AP-CB2580
381-128MK
Operator’s Manual
Printed 1/18/22

1/18/22AP-CB2568, AP-CB2574, & AP-CB2580 4-in-1 Combo Buckets 381-128MK
Machine Identification
Record your machine details in the log below. If you replace this manual, be sure to transfer this information to the new
manual.
If you, or the dealer, have added Options not originally ordered with the machine, or removed Options that were
originally ordered, the weights and measurements are no longer accurate for your machine. Update the record by
adding the machine weight and measurements provided in the Specifications & Capacities Section of this manual with
the Option(s) weight and measurements.
Dealer Contact Information
Model Number
Serial Number
Machine Height
Machine Length
Machine Width
Machine Weight
Delivery Date
First Operation
Accessories
Name:
Street:
City/State:
Telephone:
Email:
California Proposition 65
WARNING: Cancer and reproductive harm - www.P65Warnings.ca.gov
!

Table of Contents
© Copyright 2022 All rights Reserved
Kubota provides this publication “as is” without warranty of any kind, either expressed or implied. While every precaution has been taken in the preparation of this manual, Kubota
assumes no responsibility for errors or omissions. Neither is any liability assumed for damages resulting from the use of the information contained herein. Kubota reserves the right
to revise and improve its products as it sees fit. This publication describes the state of this product at the time of its publication, and may not reflect the product in the future.
Kubota is a registered trademark.
All other brands and product names are trademarks or registered trademarks of their respective holders.
Printed in the United States of America.
1/18/22 AP-CB2568, AP-CB2574, & AP-CB2580 4-in-1 Combo Buckets 381-128MK
Table of Contents
Important Safety Information . . . . . . . . . . . . . 1
Safety at All Times . . . . . . . . . . . . . . . . . . . . . . . . . 1
Look for the Safety Alert Symbol . . . . . . . . . . . . . . . 1
Safety Labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Using This Manual . . . . . . . . . . . . . . . . . . . . . . . . . 8
Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Owner Assistance . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Serial Number . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Section 1: Assembly & Set-Up . . . . . . . . . . . . 9
Skid Steer Requirements . . . . . . . . . . . . . . . . . . . . 9
Torque Requirements . . . . . . . . . . . . . . . . . . . . . . . 9
Before You Start . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Skid Steer Shutdown . . . . . . . . . . . . . . . . . . . . . . . . 9
Skid Steer Hook-Up . . . . . . . . . . . . . . . . . . . . . . . 10
Hydraulic Hose Hook-Up . . . . . . . . . . . . . . . . . . . . 10
Equipment Clearances . . . . . . . . . . . . . . . . . . . . . 11
Purge Hydraulic System . . . . . . . . . . . . . . . . . . . . 11
Section 2: Assembly & Set-up of Options . . 12
Counterbalance Valve Option . . . . . . . . . . . . . . . . 12
Spill Guard Option . . . . . . . . . . . . . . . . . . . . . . . . . 13
Section 3: Operating Procedures . . . . . . . . . 14
Operating Checklist . . . . . . . . . . . . . . . . . . . . . . . . 14
General Inspection . . . . . . . . . . . . . . . . . . . . . . . . 14
Operating Safety . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Transport Safety . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Combination Bucket Operation . . . . . . . . . . . . . . . 16
Operating Tips . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Digging With The Bucket . . . . . . . . . . . . . . . . . . 16
Picking Up A Load With The Jaws/Clamshell . . . 17
Traveling With A Load . . . . . . . . . . . . . . . . . . . . 17
Releasing A Load . . . . . . . . . . . . . . . . . . . . . . . . 17
Scraping, Leveling, & Digging With The Jaw . . . 18
Dozing With The Bucket . . . . . . . . . . . . . . . . . . 18
Unhooking the Combination Bucket . . . . . . . . . . . 18
General Operating Instructions . . . . . . . . . . . . . . . 19
Section 4: Maintenance & Lubrication . . . . . 20
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Skid Steer Maintenance . . . . . . . . . . . . . . . . . . . . 20
Bucket Side Cutters . . . . . . . . . . . . . . . . . . . . . . . . 20
Clamshell Blades . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Front Cutting Edge . . . . . . . . . . . . . . . . . . . . . . . . 22
Pin-on Teeth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Long-Term Storage . . . . . . . . . . . . . . . . . . . . . . . . 23
Lubrication Points . . . . . . . . . . . . . . . . . . . . . . . . . 23
Combination Bucket Jaw Pivot Points . . . . . . . . 23
Hydraulic Cylinder Rod Pivot Points . . . . . . . . . . 23
Section 5: Specifications & Capacities . . . . . 24
Section 6: Features & Benefits . . . . . . . . . . . 25
Section 7: Troubleshooting . . . . . . . . . . . . . . 26
Section 8: Torque Values Chart . . . . . . . . . . . 27
Section 9: Warranty & Legal Disclaimer . . . . 28

Table of Contents Continued
Parts Manual QR Locator
The QR (Quick Reference) code on the left
will take you to the Parts Manual for this
equipment. Download the appropriate
App on your smart phone, open the App,
point your phone on the QR code and
take a picture.
Dealer QR Locator
The QR code on the left will
link you to available dealers
for Kubota products. Refer to
Parts Manual QR Locator on
this page for detailed
instructions.
Table of Contents
1/18/22AP-CB2568, AP-CB2574, & AP-CB2580 4-in-1 Combo Buckets 381-128MK
See previous page for Table of Contents.

Important Safety Information
1/18/22 1
Important Safety Information
Listed below are common practices that may or may not be applicable to the products
described in this manual.

Safety at All Times
Careful operation is your best
assurance against an accident.
All operators, no matter how much
experience they may have, should
carefully read this manual and
other related manuals, or have the
manuals read to them, before
operating the power machine and
this attachment.
Thoroughly read and understand
the “Safety Label” section. Read
all instructions noted on them.
Do not operate the equipment
while under the influence of drugs
or alcohol as they impair the ability
to safely and properly operate the
equipment.
Operator should be familiar with all
functions of the skid steer and
attachment and be able to handle
emergencies quickly.
Make sure all guards and shields
appropriate for the operation are in
place and secured before
operating the attachment.
Keep all bystanders away from
equipment and work area.
Start skid steer from the driver’s
seat with steering levers and
hydraulic controls in neutral.
Operate skid steer and controls
from the driver’s seat only.
Never dismount from a moving
skid steer or leave the skid steer
unattended with the engine
running.
Do not allow anyone to stand
between the attachment and skid
steer while hooking-up.
Keep hands, feet, and clothing
away from power-driven parts.
While transporting and operating
equipment, watch out for objects
overhead and along side such as
fences, trees, buildings, wires, etc.
Store attachment in an area where
children normally do not play.
When needed, secure attachment
against falling with support blocks.
OFF
REMOVE
Safety Precautions for
Children
Tragedy can occur if the operator
is not alert to the presence of
children. Children generally are
attracted to attachments and their
work.
Never assume children will remain
where you last saw them.
Keep children out of the work area
and under the watchful eye of a
responsible adult.
Be alert and shut the attachment
and skid steer/track loader down if
children enter the work area.
Never carry children on the power
machine or attachment. There is
not a safe place for them to ride.
They may fall off and be run over
or interfere with the control of the
power machine.
Never allow children to operate the
power machine, even under adult
supervision.
Never allow children to play on the
power machine or attachment.
Use extra caution when backing
up. Before the power machine
starts to move, look down and
behind to make sure the area is
clear.
Skid Steer Shutdown
And Storage
Reduce engine speed and shut-off
all power to the attachment.
Park on solid, level ground and
lower attachment until it is flat on
the ground or on non-concrete
support blocks.
Turn off engine. Do not remove
ignition key at this time.
Turn ignition key to the “RUN”
position. Relieve all hydraulic
pressure by moving both joysticks.
Turn ignition key to Off and remove
to prevent unauthorized starting.
If included, raise seat bar and
move controls until both lock.
Wait for all components to stop
before leaving operator’s seat.
Use steps, grab-handles and
anti-slip surfaces when stepping
on and off the skid steer.
Look for the Safety Alert Symbol
The SAFETY ALERT SYMBOL indicates there is a potential hazard
to personal safety and extra precaution must be taken. When you
see this symbol, be alert and carefully read the message that
follows it. Hazard control, and accident prevention are dependent
upon the awareness, concern, prudence, and proper training of
personnel involved in the operation, transport, maintenance, and
storage of equipment.
!
Be Aware of Signal Words
A signal word designates a degree or level of hazard seriousness. They are:
DANGER:
!
WARNING:
CAUTION:
!
!
Indicates a hazardous situation that, if not avoided, will result
in death or serious injury.
Indicates a hazardous situation that, if not avoided, could
result in death or serious injury.
Indicates a hazardous situation that, if not avoided, may result
in minor or moderate injury.
Be Aware of Special Notices
Special notices are intended to point out important and helpful information that
should be followed. They are usually placed inside a box. They are:
Indicates that equipment or property damage could result if
instructions are not followed.
Indicates supplementary explanations that will be helpful when
using the equipment.
IMPORTANT:
NOTE:

Important Safety Information
1/18/22
2
Dig Safe - Avoid
Underground Utilities
USA: Call 811
CAN: digsafecanada.ca
Always contact your local utility
companies (electrical, telephone,
gas, water, sewer, and others)
before digging so that they may
mark the location of any
underground services in the
area.
Be sure to ask how close you can
work to the marks they
positioned.
Listed below are common practices that may or may not be applicable to the products
described in this manual.
Transport Safely
Comply with federal, state, and local
laws.
Use towing vehicle and trailer of
adequate size and capacity. Secure
equipment towed on a trailer with
chocks, tie downs, and chains.
Sudden braking can cause a towed
trailer to swerve unexpectedly.
Reduce speed if towed trailer is not
equipped with brakes.
Avoid contact with any overhead
utility lines or electrically charged
conductors.
Always drive with load on end of
loader arms low to the ground.
Always drive straight up and down
steep inclines with heavy end of skid
steer on the “uphill” side.
Engage park brake when stopped on
an incline.
Maximum transport speed for an
attached equipment is 20 mph
(32 km/h). DO NOT EXCEED. Never
travel at a speed which does not
allow adequate control of steering
and stopping. Some rough terrains
require a slower speed.
As a guideline, use the following
maximum speed weight ratios for
attached equipment:
20 mph (32 km/h) when weight of
attached equipment is less than or
equal to the weight of machine
towing the equipment.
10 mph (16 km/h) when weight of
attached equipment exceeds
weight of machine towing
equipment but not more than
double the weight.
IMPORTANT: Do not tow a load that
is more than double the weight of the
vehicle towing the load.
Practice Safe Maintenance
Understand procedure before doing
work. Refer to the Operator’s Manual
for additional information.
Work on a level surface in a clean
dry area that is well-lit.
Lower attachment to the ground and
follow all shutdown procedures
before leaving the operator’s seat to
perform maintenance.
Do not work under any hydraulically
supported equipment. It can settle,
suddenly leak down, or be lowered
accidentally. If it is necessary to work
under the equipment, securely
support it with stands or suitable
blocking beforehand.
Use properly grounded electrical
outlets and tools.
Use correct tools and equipment for
the job that are in good condition.
Allow equipment to cool before
working on it.
Disconnect battery ground cable (-)
before servicing or adjusting
electrical systems or before welding
on equipment.
Inspect all parts. Make certain that
parts are in good condition &
installed properly.
Replace parts on this attachment
with genuine Kubota parts only. Do
not alter this attachment in a way
which will adversely affect its
performance.
Do not grease or oil attachment
while it is in operation.
Remove buildup of grease, oil, or
debris.
Always make sure any material and
waste products from the repair and
maintenance of the attachment are
properly collected and disposed.
Remove all tools and unused parts
from the equipment before
operation.
Tire Safety
Tire changing
can be
dangerous
and must be
performed by
trained personnel using the
correct tools and equipment.
Always properly match the wheel
size to the properly sized tire.
Always maintain correct tire
pressure. Do not inflate tires
above recommended pressures
shown in the Operator’s Manual.
When inflating tires, use a clip-on
chuck and extension hose long
enough to allow you to stand to
one side and NOT in front of or
over the tire assembly. Use a
safety cage if available.
Securely support the attachment
when changing a wheel.
When removing and installing
wheels, use wheel handling
equipment adequate for the
weight involved.
Make sure wheel bolts have been
tightened to the specified torque.

Important Safety Information
1/18/22 3
These are common practices that may or may not be applicable to the products described in
this manual.
Prepare for Emergencies
Be prepared if a fire starts.
Keep a first aid kit and fire
extinguisher handy.
Keep emergency numbers for
doctor, ambulance, hospital, and
fire department near phone.
911
Use Safety
Lights and Devices
A slow moving power machine
can create a hazard when driven
on public roads. They are difficult
to see, especially at night. Use
the Slow Moving Vehicle (SMV)
sign when on public roads.
Flashing warning lights and turn
signals are recommended
whenever driving on public roads.
Keep Riders Off
Machinery
Never carry riders on skid steer
or attachment.
Riders obstruct operator’s view
and interfere with the control of
the power machine.
Riders can be struck by objects
or thrown from the equipment.
Never use skid steer or
attachment to lift or transport
riders.
Use Seat Belt and ROPS
Kubota recommends the use of a
CAB or roll-over-protective-
structures (ROPS) and seat belt
in almost all power machines.
Combination of a CAB or ROPS
and seat belt will reduce the risk
of serious injury or death if the
power machine should be upset.
If ROPS is in the locked-up
position, fasten seat belt snugly
and securely to help protect
against serious injury or death
from falling and machine
overturn.
Avoid High Pressure
Fluids
Escaping fluid
under pressure will
penetrate the skin or
eyes causing serious injury.
Relieve all residual pressure
before disconnecting hydraulic
lines or performing work on the
hydraulic system.
Make sure all hydraulic fluid
connections are properly
tightened/torqued and all
hydraulic hoses and lines are in
good condition before applying
pressure to the system.
Use a piece of paper or
cardboard, NOT BODY PARTS,
to check for suspected leaks.
Wear protective gloves and
safety glasses or goggles when
working with hydraulic systems.
DO NOT DELAY. If an accident
occurs, seek immediate
emergency medical care or
gangrene may result.
Wear Personal Protective
Equipment (PPE)
Wear protective clothing and
equipment appropriate for the job
such as safety shoes, safety,
glasses, hard hat, dust mask,
and ear plugs.
Clothing should fit snug without
fringes and pull strings to avoid
entanglement with moving parts.
Prolonged exposure to loud noise
can cause hearing impairment or
hearing loss. Wear suitable
hearing protection such as
earmuffs or earplugs.
Operating a machine safely
requires the operator’s full
attention. Avoid wearing
headphones while operating
equipment.

Important Safety Information
1/18/22
4
Avoid crystalline Silica
(quartz) Dust
Because crystalline silica is a basic
component of sand and granite,
many activities at construction sites
produce dust containing crystalline
silica. Trenching, sawing, and boring
of material containing crystalline
silica can produce dust containing
crystalline silica particles. This dust
can cause serious injury to the
lungs (silicosis).
There are guidelines which should
be followed if crystalline silica
(quartz) is present in the dust.
Be aware of and follow OSHA
(or other local, State, or Federal)
guidelines for exposure to airborne
crystalline silica.
Know the work operations where
exposure to crystalline silica may
occur.
Participate in air monitoring or
training programs offered by the
employer.
Be aware of and use optional
equipment controls such as water
sprays, local exhaust ventilation,
and enclosed cabs with positive
pressure air conditioning if the
machine has such equipment.
Otherwise respirators shall be worn.
Where respirators are required, wear
a respirator approved for protection
against crystalline silica containing
dust. Do not alter respirator in any
way. Workers who use tight-fitting
respirators can not have beards/
mustaches which interfere with the
respirator seal to the face.
If possible, change into disposable
or washable work clothes at the
work site; shower and change into
clean clothing before leaving the
work site.
Do not eat, drink, use tobacco
products, or apply cosmetics in
areas where there is dust containing
crystalline silica.
Store food, drink, and personal
belongings away from the work
area.
Wash hands and face before eating,
drinking, smoking, or applying
cosmetics after leaving the exposure
area.
Listed below are common practices that may or may not be applicable to the products
described in this manual.
Handle
Chemicals Properly
Protective clothing should be
worn.
Handle all chemicals with care.
Follow instructions on container
label.
Agricultural chemicals can be
dangerous. Improper use can
seriously injure persons, animals,
plants, soil, and property.
Inhaling smoke from any type of
chemical fire can be a serious
health hazard.
Store or dispose of unused
chemicals as specified by the
chemical manufacturer.

Important Safety Information
1/18/22 5
This page left blank intentionally.

Important Safety Information
Table of Contents
1/18/22AP-CB2568, AP-CB2574, & AP-CB2580 4-in-1 Combo Buckets 381-128MK
6
39594
39595
Safety Labels
Your 4-in-1 Combination Bucket comes equipped with all safety
labels in place. They are designed to help you safely operate
your attachment. Read and follow their directions.
1. Keep all safety labels clean and legible.
2. Refer to this section for proper label placement. Replace
all damaged or missing labels. Order new labels from your
nearest Kubota dealer. To find your nearest dealer, visit
our dealer locator at www.landpride.com.
3. Some new equipment installed during repair requires
safety labels to be affixed to the replaced component as
specified by Kubota. When ordering new components make
sure the correct safety labels are included in the request.
4. Refer to this section for proper label placement.
To install new labels:
a. Clean surface area where label is to be placed.
b. Spray soapy water onto the cleaned area.
c. Peel backing from label and press label firmly onto the
surface.
d. Squeeze out air bubbles with edge of a credit card or
with a similar type of straight edge.
Important Safety Information
838-293C
Warning: Read Operator’s Manual - General Warning
1 Place: On the backside of the bucket.
70243
818-045C
Warning: Pinch Point or Crushing Hazard
2 Places: On the left-hand and right-hand side plates.
70312

Important Safety Information
Table of Contents
1/18/22 AP-CB2568, AP-CB2574, & AP-CB2580 4-in-1 Combo Buckets 381-128MK 7
39595
39596
858-237C
Warning: Underground Utilities Hazard
1 Place: On the backside of the bucket.
70743
838-094C
Warning: High Pressure Fluid Hazard
1 Place: On the backside of the bucket.
70245

Introduction
Table of Contents
1/18/22AP-CB2568, AP-CB2574, & AP-CB2580 4-in-1 Combo Buckets 381-128MK
8
Introduction Owner Assistance
The dealer should complete the Online Warranty
Registration at the time of purchase. This information is
necessary to provide you with quality customer service.
The parts on your 4-in-1 Combination Bucket have been
specially designed by Kubota/Land Pride and should only
be replaced with genuine Kubota parts. Contact a Kubota
dealer if customer service or repair parts are required.
Your Kubota dealer has trained personnel, repair parts,
and equipment needed to service the attachment.
Serial Number
For quick reference and prompt service, record model
and serial number on the inside cover page and again on
the warranty page. Always provide model number and
serial number when ordering parts and in all
correspondences with your Kubota dealer. For location of
your serial number plate, see Figure 1.
Serial Number Plate Location
Figure 1
Further Assistance
Your Kubota dealer wants you to be satisfied with your
new attachment. If for any reason you do not understand
any part of this manual or are not satisfied with the
service received, the following actions are suggested:
1. Discuss any problems you have with your attachment
with your dealership service personnel so they can
address the problem.
2. If you are still not satisfied, seek out the owner or
general manager of the dealership, explain the
question/problem, and request assistance.
3. For further assistance write to:
Kubota by Land Pride
Service Department
1525 East North Street
P.O. Box 5060
Salina, Ks. 67402-5060
E-mail address
lpservicedep[email protected]
39596
Kubota welcomes you to the growing family of new
product owners. This 4-in-1 Combination Bucket has
been designed with care and built by skilled workers
using quality materials. Proper assembly, maintenance,
and safe operating practices will help you get years of
satisfactory use from this attachment.
Application
The Kubota 4-in-1 Combination Buckets, Models
CB2568, CB2574, and CB2580 have uses and
applications in construction sites, farming, ranching,
feedlots, nurseries, orchards, and parks. They have the
capability to quickly and conveniently turn your skid steer
into a combination bucket loader for loading, carrying,
and dumping dirt, sand, gravel, and other materials. Use
the jaw as a grapple to pick up loose materials such as
large rocks, tree branches, sticks, loose hay, silage, and
manure. Fully open, the jaw can be used for digging,
scraping, leveling, and finish grading with dirt, gravel, and
sand, or as a dozer for digging, moving and backfilling
dirt, gravel, sand, and similar materials.
The optional spill guard adds bucket capacity and helps
hold loose materials in the bucket when picking up a load
and when transporting a load.
Whichever model you select, you’ll find that these Kubota
attachments will save you time and money and make
getting that material handling job done a whole lot easier.
For additional information and performance enhancing
options, see “Specifications & Capacities” on page 24
and “Features & Benefits” on page 25.
Using This Manual
•This Operator’s Manual is designed to help familiarize
you with safety, assembly, operation, adjustments,
troubleshooting, and maintenance. Read this manual
and follow the recommendations to help ensure safe
and efficient operation.
•The information contained within this manual was
current at the time of printing. Some parts may change
slightly to assure you of the best performance.
•To order a new Operator’s or Parts Manual, contact
your authorized dealer. Manuals can also be
downloaded, free-of-charge, from our website at
www.landpride.com
Terminology
“Right” or “Left” as used in this manual is determined by
the direction the operator faces while sitting looking
forward in the operator’s seat unless otherwise stated.

Section 1: Assembly & Set-Up
Table of Contents
1/18/22 AP-CB2568, AP-CB2574, & AP-CB2580 4-in-1 Combo Buckets 381-128MK 9
Section 1: Assembly & Set-Up
Skid Steer Shutdown
The following are basic skid steer shutdown procedures.
Follow these procedures and any additional shutdown
procedures provided in your skid steer Operator’s
Manual before leaving the operator’s seat.
1. Reduce engine speed and shut-off all power to the
attachment.
2. Park on solid, level ground and lower attachment until
it is flat on the ground or on non-concrete support
blocks.
3. Turn off engine. Do not remove ignition key at this
time.
4. Turn ignition key to the “RUN” position and relieve all
hydraulic pressure by moving both joysticks.
5. Turn ignition key off and remove to prevent
unauthorized starting.
6. If included, raise seat bar and move controls until
both lock.
7. Wait for all components to come to a complete stop
before leaving the operator’s seat.
8. Use steps, grab-handles and anti-slip surfaces when
stepping on and off the skid steer or attachment.
Pre-Assembly Checklist
Check Ref.
Have a hoist, forklift, or loader with properly sized chains and
safety stands capable of lifting and supporting the equipment
on hand.
Have a minimum of two people available during assembly.
Make sure all major components and loose
parts are shipped with the attachment.
Operator’s
Manual
381-128MK
Double check to make sure all parts, fasteners,
and pins are installed in the correct location.
Refer to the Parts Manual if unsure.
NOTE: All assembled hardware from the factory
has been installed in the correct location.
Remember location of a part or fastener if
removed. Keep parts separated.
Operator’s
Manual
381-128MK
Parts Manual
381-128PK
Make sure working parts move freely, bolts are
tight and cotter pins are spread.
Operator’s
Manual
Make sure all grease fittings are in place and
lubricated. Page 23
Make sure all safety labels are correctly located
and legible. Replace if damaged. Page 6
Skid Steer Requirements
The 4-in-1 Combination Bucket is designed to attach to
skid steer loaders with the following minimum
requirements:
Hitch type. . . . . . . . . . . . . . . . Universal Quick Attach
Maximum hydraulic pressure . . . 3,500 psi (24.1 mPa)
Hydraulic connections . . . . . . . . . . . . . . . . . 2 outlets
Skid steer weight . . . . . . . . . . . . . See Warning below
WARNING
!
To avoid serious injury or death:
•Consult your power machine Operator’s Manual for
operating capacity, lifting capacity, and operating
specifications. Exceeding rated capacities and
specifications can result in loss of control, roll-over or other
serious hazard.
•Use a power machine of adequate size for the load being
carried. An undersized machine can roll over when raising
the loader arms due to high center of gravity.
•Lightweight power machines may need weight added to the
rear to maintain steering control and prevent forward
tipping or side tipping caused by a heavy front load. Consult
your power machine Operator’s Manual to determine
proper weight requirements and maximum weight
limitations.
Torque Requirements
Refer to “Torque Values Chart” on page 27 to determine
correct torque values when tightening hardware.
Before You Start
WARNING
!
To avoid serious injury or death:
Allow only persons to operate this attachment who have fully
read and comprehended this manual, and who have been
properly trained in the safe operation of this attachment.
Serious injury or death can result from failure to read,
understand, and follow instructions provided in this manual.
Make sure the intended skid steer conforms to the “Skid
Steer Requirements” stated above. Read and
understand the operator’s manual for your 4-in-1
Combination Bucket. An understanding of how it works
will aid in the assembly and setup of your bucket.
Go through the “Pre-Assembly Checklist” on this page
before assembling the 4-in-1 Combination Bucket.
Speed up your assembly task and make the job safer by
having all needed parts and equipment readily at hand.

Section 1: Assembly & Set-Up
Table of Contents
1/18/22AP-CB2568, AP-CB2574, & AP-CB2580 4-in-1 Combo Buckets 381-128MK
10
Skid Steer Hook-Up
Refer to Figure 1-1:
DANGER
!
To avoid serious injury or death:
A crushing hazard exists when hooking-up and unhooking the
attachment. Do not allow anyone to stand between attachment
and power machine while approaching or backing away from
the attachment. Do not operate hydraulic controls while
someone is near the power machine and/or attachment.
WARNING
!
To avoid serious injury or death:
Check hitch fit-up frequently. An improper fit-up can cause the
attachment to come loose from the loader hitch plate and fall.
1. Check for and remove any debris in the hitch point
areas before hooking-up bucket.
2. Drive skid steer slowly to the bucket hitch plate
making sure the skid steer universal quick attach
hitch is parallel with the bucket’s top angle bar.
3. Rotate top of skid steer hitch slightly forward.
4. Place top of skid steer hitch under the top angled
bars on the bucket hitch plate. Slowly raise skid steer
hitch up until it is fully seated under the top angle bars.
5. Rotate top of skid steer hitch back until bucket hitch
plate makes full contact with face of skid steer hitch.
NOTE: The 4-in-1 Combination Bucket is designed
for hooking-up to skid steers only.
6. Push lock handles on skid steer hitch down ensuring
lock pins go through bottom slots in bucket hitch
plate. Make sure lock handles are in the locked down
position.
Hydraulic Hose Hook-Up
WARNING
!
To avoid serious injury or death:
•Lock auxiliary hydraulics of your power unit in the “OFF”
position. Locking auxiliary hydraulics “ON” can result in
serious injury or death.
•Hydraulic fluid under high pressure will penetrate the skin
or eyes causing a serious injury. Wear protective gloves and
safety glasses or goggles when working with hydraulic
systems. Use a piece of cardboard or wood rather than
hands when searching for leaks. If an accident occurs, seek
immediate emergency medical care or gangrene may result.
DO NOT DELAY.
IMPORTANT: Make sure coupler fittings on
hydraulic hoses and skid steer are clean before
connecting them together.
NOTE: Refer to Figure 1-1:
The bucket is shipped with elbows (#7) assembled
to hydraulic hoses (#1 & #2). Shipped loose with the
bucket are two straight adapters (#8) that can be
switched out with elbows (#7) to provide an alternate
hose fit-up arrangement to the skid steer couplers.
Hook-up to combination bucket
Figure 1-1
39599

Section 1: Assembly & Set-Up
Table of Contents
1/18/22 AP-CB2568, AP-CB2574, & AP-CB2580 4-in-1 Combo Buckets 381-128MK 11
Kubota Hose Stay Kit
(Shown with Grapple Attachment)
Figure 1-2
Refer to Figure 1-2:
1. Route hydraulic hoses (#1 & #2) through the most
convenient path to access your skid steer couplers.
Path shown may not be the most convenient.
2. Clean quick connect couplers of dirt and then
connect male and female couplers to the skid steer
outlets. Make sure quick connect couplers have fully
engaged. If they have not, check the following:
a. Make sure couplers are same size and type.
b. Make sure hydraulic pressure has been released.
3. Extend and retract hydraulic cylinders with skid steer
controls. Switch male and female couplers (#3 & #4)
on hydraulic hoses (#1 & #2) if hydraulic cylinders
operate the opposite direction intended and then
reconnect hoses to the skid steer outlets.
4. For additional help, refer to Hydraulic Hook-Up in
your skid steer Operator’s Manual.
4
3
2
1
37392
Hose Stay Kit
NOTE: If attaching to a Kubota skid steer or track
loader, route hydraulic hoses through Kubota’s
Hose Stay as shown in Figure 1-2. Purchase Hose
Stay #S6763 through your nearest Kubota dealer.
Refer to your power machine Operator’s Manual for
more instructions.
Equipment Clearances
It is important to check clearance before putting bucket
into operation. Make sure hoses are long enough and
won’t become pinched or entangled in the equipment.
Also, make sure the bucket does not come in contact with
the skid steer frame, tires, cylinders, etc. by carefully
going through its full range of motions.
1. Visually inspect hydraulic hoses for possible pinch
points and shortness. Make hose adjustments before
putting equipment into service.
2. Start skid steer and raise bucket approximately
12" (30.5 cm) off the ground.
3. If necessary, have someone stand nearby that can
motion for the operator to stop if a problem develops
while completing steps 4-7 below.
4. Fully extend hydraulic cylinder to pivot jaw fully down.
5. Raise loader arms just enough for bucket to clear the
ground.
6. Fully extend and retract tilt cylinders on end of loader
arms while watching for interferences between skid
steer and bucket frame. Make sure hydraulic hoses
are long enough and do not become pinched through
the full range of motion.
7. Fully retract hydraulic cylinder to pivot bucket jaw
fully up and repeat step 5.
8. Raise bucket fully up and repeat steps 4-6.
Purge Hydraulic System
1. With bucket raised off the ground about
12" (30.5 cm), cycle bucket hydraulic cylinders
several times from fully extended to fully retracted.
Refer to Figure 1-1 on page 10:
2. If cylinders operate unevenly after cycling it several
times, then purge the system as follows:
a. Loosen straight adapter fittings (#5) at rod end of
hydraulic cylinders.
b. Slowly retract and extend hydraulic cylinders to
purge any trapped air from the system.
c. Tighten straight adapter fittings (#5) to hydraulic
cylinders once all trapped air is removed.
IMPORTANT: The hydraulic cylinders and/or hoses
can contain air and should be purged before use.
Not purging hydraulic cylinders and hoses of air can
cause uneven, jerky cylinder movement.

Section 2: Assembly & Set-up of Options
Table of Contents
1/18/22AP-CB2568, AP-CB2574, & AP-CB2580 4-in-1 Combo Buckets 381-128MK
12
9. Screw new straight adapters (#8L & #8R) in hydraulic
cylinders ports “A” until tight.
10. Screw hydraulic hoses (#4L & #4R) to straight
adapters (#8L & #8R) as shown until tight.
11. Attach counterbalance valve (#10) to mounting
bracket (#3) with 5/16"-18 x 2 1/2" GR5 bolts (#9) and
hex whiz nuts (#2B). Tighten hex whiz nuts to the
correct torque.
12. Insert tab of mounting bracket (#3) in slot “B” and
secure to the bucket with existing 5/16"-18 x 3/4"
GR5 hex head bolts (#1) and hex whiz nuts (#2A).
Tighten hex whiz nuts to the correct torque.
13. Select hydraulic hose (#6 or #7) with the coupler that
mates the skid steer high pressure coupler and screw
that hose to straight adapter (#8C) until tight.
14. Screw the remaining hydraulic hose (#6 or #7) to
straight adapter (#8B) until tight.
15. Screw lower hydraulic hose (#5L) to adapter (#8A)
until tight.
16. Screw upper hydraulic hose (#4L) to straight adapter
(#8D) until tight.
17. Screw upper hydraulic hose (#4R) to straight adapter
(#8E) until tight.
18. Screw lower hydraulic hose (#5R) to straight adapter
(#8F) until tight.
Counterbalance Valve Option
The counterbalance valve is assembled to the bucket at
the factory unless purchased later.
381-101A Counterbalance Valve Assembly
Refer to Figure 2-1:
1. Unscrew hydraulic hoses (#4L, #4R, #5L, & #5R)
from tee fittings (#13).
2. Unscrew hydraulic hoses (#6, & #7) from elbow
fittings (#12).
3. Remove hex whiz nuts (#2A), hex bolts (#1), and
mounting bracket (#3) from back of bucket frame.
4. Remove hex whiz nuts (#14), u-bolt (#11), and
fittings (#12 & #13) from mounting bracket (#3). Keep
mounting bracket (#3) and hardware (#1 & #2A) for
reuse.
5. Unscrew hydraulic hoses (#4L & #4R) from orifice
fittings (#8L & #8R).
6. Remove orifice fittings (#8L & #8R) from hydraulic
ports “A” on the rod end of the hydraulic cylinders.
7. Discard or store fittings (#8L, #8R, #12, & #13),
u-bolt (#12), and hex whiz nuts (#14).
8. Screw straight adapters (#8A, 8B, 8C, 8D, 8E, & 8F)
to ports (LR, EXT, RET, RR, & RB) in counter balance
valve (#10) until tight.
NOTE: New straight adapters (#8L & #8R) are not
orificed fittings.
Section 2: Assembly & Set-up of Options
Set-up Without Counterbalance Valve
Figure 2-1
39612

Section 2: Assembly & Set-up of Options
Table of Contents
1/18/22 AP-CB2568, AP-CB2574, & AP-CB2580 4-in-1 Combo Buckets 381-128MK 13
Spill Guard Option
The spill guard is assembled to the bucket at the factory
unless purchased later.
381-118A 68" Spill Guard Assembly
381-117A 74" Spill Guard Assembly
381-100A 80" Spill Guard Assembly
Refer to Figure 2-2:
1. Remove hex nuts (#3) and bolts (#4) from pivot
pins (#5).
2. Drive pivot pins (#5) outward until flush with face of
inside pivot holes as shown on the right-hand side.
3. Attach spill guard (#1) to the back top lip of the bucket
with 5/16"-18 x 1" GR5 hex head bolts (#2). Do not
tighten bolts at this time.
4. Drive pivot pins (#5) inward and reinsert bolts (#4).
5. Secure bolts (#4) with 5/16"-18 nuts (#3). Tighten
nuts to the correct torque for GR5 bolts.
6. Tighten hex head bolts (#2) to the correct torque.
Spill Guard Option (CB2568 Shown)
Figure 2-2
39598

Section 3: Operating Procedures
Table of Contents
1/18/22AP-CB2568, AP-CB2574, & AP-CB2580 4-in-1 Combo Buckets 381-128MK
14
movements are correct. Make necessary changes to
controls and hydraulic hook-ups before putting
equipment into service.
8. Operate bucket through its full range of movements
to check for clearances. Refer to “Equipment
Clearances” on page 11.
9. Purge hydraulic system of trapped air by operating all
hydraulic functions several times before putting unit
into service. Purge hydraulic system at the cylinder
ports if the hydraulic system continues to operate
erratic, see “Purge Hydraulic System” on page 11
and in your skid steer Operator’s Manual.
Operating Safety
DANGER
!
To avoid serious injury or death:
•The operator of this attachment must know how to control
the power machine with attachment and how to stop them
quickly in an emergency.
•Never come in contact with power lines, utilities, gas lines,
or other hazards, above or below ground. They can cause
serious injury or death from electrocution, explosion, or
fire. Before digging, call dig safe 811 (USA only) so utility
companies can mark the location of underground services in
the area.
•Do not drive up to anyone or an animal in front of a fixed
object such as a wall or bench. Never assume that the power
machine will stop in time.
•Keep bystanders, pets, and livestock away from your work
area. Never allow anyone to go near or under the
attachment or its load. The attachment and/or load can fall.
•Make sure all objects are contained and/or secured before
lifting. Do not lift a load that cannot be contained in the
attachment as the load can shift and fall.
•Do not lift a load that cannot be contained in the
attachment.
•Keep load positioned forward enough to prevent accidental
spillage onto the operator and power machine.
•Keep load slightly tilted back to secure its weight against
the vertical face of the attachment. Rotating front of
attachment too high can cause the load to shift and fall onto
the operator or others. Rotating front of attachment level or
lower can cause the load to fall forward.
•Use a “spotter” when it is hard to see in the direction you
are traveling and when placing a load that obstructs your
vision. A person or animal could be nearby in a blind spot.
•Be safe, lift only loads with the loader arms that can be kept
under control and contained. An uncontrolled load can
result in a serious injury or death.
•Make sure the machine is stopped on solid, level ground
before raising load to dump. To maintain stability, raise
load only to the height necessary to complete the dump.
•Never dump a load around gas lines, overhead power lines,
utilities, or other hazards that can cause serious injury or
death from electrocution, explosion, or fire.
Section 3: Operating Procedures
Operating Checklist
Hazard control and accident prevention are dependent
upon the awareness, concern, prudence, and proper
training involved in the operation, transport, storage, and
maintenance of the 4-in-1 Combination Bucket.
Therefore, it is absolutely essential that no one operates
this unit unless they have read, fully understood, and are
totally familiar with the Operator’s Manual.
Perform the following checklist before using your Combo
Bucket.
General Inspection
Make the following inspections with bucket attached to a
skid steer parked on a level surface.
1. Complete Operating Checklist table provided above.
2. Inspect the bucket to make sure it is in good working
condition and that all safety alert decals are visible
and readable. Replace any safety decal that is not
visible or readable. See “Safety Labels” on page 6.
3. Inspect hitch hook-up to bucket. Make sure skid steer
universal quick attach hitch is secured under the
bucket hitch plate top angle bars, lock pins extend
fully through bottom slots in bucket hitch plate, and
lock handles are locked down.
4. Consult your skid steer Operator’s Manual to
determine if ballast is required. Add ballast if needed.
5. Inspect condition of hydraulic hoses, fittings, and
valves before starting the machine. Make sure hoses
are not pinched, kinked, twisted, or frayed and that
they will not contact moving parts and that all
connections are tight.
6. Hose sleeves help protect hoses from wear and
operator from oil sprays. Inspect hose sleeves to
make sure they are in good working condition.
Replace any sleeve that is worn thin, torn, or not
secured to the hydraulic hoses.
7. Operate hydraulic controls to verify control lever
movements function properly and equipment
Operating Checklist
Check Page
Read and follow all safety rules carefully.
Refer to “Important Safety Information” and
Safety Alert Symbols throughout this manual.
All
pages
Make sure there are no hydraulic leaks.
Refer to “Avoid High Pressure Fluids Hazard”. Page 3
Read and follow hook-up instructions.
Refer to “Section 1: Assembly & Set-Up”. Page 9
Read and follow all operating procedures.
Refer to “Section 3: Operating Procedures”.
Page
14
Read and follow all maintenance instructions.
Refer to “Section 4: Maintenance & Lubrication”.
Page
20
Check bucket initially and periodically for loose
bolts and pins. Refer to “Torque Values Chart”
Page
27

Section 3: Operating Procedures
Table of Contents
1/18/22 AP-CB2568, AP-CB2574, & AP-CB2580 4-in-1 Combo Buckets 381-128MK 15
•Do not go near or under raised loader arms without first
securing loader arms in the raised position with an
approved lift-arm support.
•Always secure equipment with solid, non-concrete supports
before working under it. Never go under equipment
supported by concrete blocks or hydraulics. Concrete can
break, hydraulic lines can burst, and/or hydraulic controls
can be actuated even when power to hydraulics is off.
•Keep your head, arms, and legs inside the cab while
operating the power machine. Any extremity extended
outside the cab can be crushed by the loader arms and
attachment.
•Never operate equipment from outside the cab.
•Use the skid steer’s alternate emergency exit when exit
passage through the front is blocked.
•Do not use hand or foot controls for handholds or steps.
Using them for handholds or steps can activate the controls.
•Keep mud, snow, ice, and debris out of foot controls.
•If included, raise restraint bar and move controls until both
are locked and interlock system is activated.
•Inspect interlock control system regularly and perform
required maintenance to keep it operating properly.
•Never bypass or modify a safety device.
WARNING
!
To avoid serious injury or death:
•Allow only persons to operate this attachment who have
fully read and comprehended this manual, and who have
been properly trained in the safe operation of this
attachment. Serious injury or death can result from failure
to read, understand, and follow instructions provided in this
manual.
•Never carry riders on the attachment or power machine.
Riders can obstruct the operator’s view, interfere with
controls, be pinched by moving components, become
entangled in rotating components, struck by objects, thrown
about, fall off and be run over, etc.
•Operate only power machines equipped with a certified
Roll-Over Protective Structure (ROPS) and seat belt.
Fasten seat belt snugly and securely to help protect against
serious injury or death from machine overturn.
•Lightweight power machines may need weight added to the
rear to maintain steering control and prevent forward
tipping or side tipping caused by a heavy front load. Consult
your power machine Operator’s Manual to determine
proper weight requirements and maximum weight
limitations.
•Consult your power machine Operator’s Manual for
operating capacity, lifting capacity, and operating
specifications. Exceeding rated capacities and
specifications can result in loss of control, roll-over or other
serious hazard.
•Keep load centered, even when stopped. This will optimize
load stability and protect against load shifting.
•Hydraulic fluid under high pressure will penetrate the skin
or eyes causing a serious injury. Wear protective gloves and
safety glasses or goggles when working with hydraulic
systems. Use a piece of cardboard or wood rather than
hands when searching for leaks. If an accident occurs, seek
immediate emergency medical care or gangrene may result.
DO NOT DELAY.
•Make sure safety labels are in their proper location and are
in good condition before operating the attached implement.
Read and obey all instructions on the labels.
•Keep body, body extremities, loose clothing, pull strings,
etc. away from pinch points such as rotating, extending,
and/or retracting components. Secure pinch point areas to
ensure they will not move before working on or near them.
•Keep bystanders away while operating the attachment. A
person can become pinched or crushed as the attachment is
opened, closed, rotated, raised, or lowered.
•Always shut power machine down following the “Shutdown
Procedure” provided in this manual before leaving the
operator’s station.
•Follow recommendations in the power machine Operator’s
Manual when parking or dismounting the power machine.
•Use steps, grab-handles, and anti-slip surfaces on the
power machine and attachment to get on and off the power
machine. Using unapproved stepping surfaces and/or
handholds can result in a falling hazard.
•Wear appropriate personal protective gear. Include eye
protection when appropriate and when operating a power
machine without an enclosure or protective shield. Dust and
debris can get into the eyes.
•Never make contact with underground utilities such as
electrical power lines, gas lines, phone lines, etc. They can
cause serious injury or death from electrocution, explosion,
or fire. Always call 811 (USA) before digging so that they
can mark the location of underground services in the area.
For contact information, see Dig Safe in the “Important
Safety Information” starting on page 1.
•Avoid exposure to dust containing crystalline silica
particles. This dust can cause serious injury to the lungs
(silicosis). Because crystalline silica is a basic component
of sand and granite, many activities at construction sites
produce dust containing crystalline silica. Trenching,
sawing, and boring of material containing crystalline silica
can produce dust containing crystalline silica.
•Do not alter implement or replace parts on the implement
with other brands. Other brands may not fit properly or
meet OEM (Original Equipment Manufacturer)
specifications. They can weaken the integrity and impair the
safety, function, performance, and life of the implement.
Replace parts only with genuine OEM parts. Kubota parts.
•Do not abuse equipment. Incorrect use of the attachment
can damage equipment structurally and cause serious
injury or death.
•Use a power machine of adequate size for the load being
carried. An undersized machine can roll over when raising
the loader arms due to high center of gravity.

Section 3: Operating Procedures
Table of Contents
1/18/22AP-CB2568, AP-CB2574, & AP-CB2580 4-in-1 Combo Buckets 381-128MK
16
•Check hitch fit-up frequently. An improper fit-up can cause
the attachment to come loose from the loader hitch plate
and fall.
•Do not chain or strap loads to the loader arms, hitch, or
attachment. Hitting solid objects with a load fastened to the
attachment or machine can cause frame damage and/or
tipping resulting in the loss of operator control.
•Do not use this attachment to lift, carry, push or tow other
equipment or objects. It is not properly designed or guarded
for this use. The operator could lose control resulting in
equipment damage and/or tipping hazard.
•Do not use attachment for lifting front end of skid steer off
the ground. Doing so can damage attachment and cause
injury.
•Always lower the attachment to ground level and fully close
the jaw before dismounting the power machine.
Transport Safety
DANGER
!
To avoid serious injury or death:
Keep attachment, loader arms, and/or load away from
overhead electrical power lines. Place an orange warning
sign under overhead lines indicating type of danger above.
WARNING
!
To avoid serious injury or death:
•Follow all safety precautions when transporting a load. Not
using safe transporting methods can damage the equipment
and cause serious injury or death.
•Keep attachment, loader arms, and/or load away from
overhead electrical power lines. Place an orange warning
sign under overhead lines indicating type of danger above.
•Keep load centered, even when stopped. This will optimize
load stability and protect against load shifting.
•Always transport loads as close to the ground as possible
without hitting objects. A load carried high could shift
causing the load to fall, tipping of the machine, and/or loss
of control.
•Always transport over ramps and inclines with the heavy
end of the power machine on the “uphill” side. This may
require one to drive up or back down inclines.
•Always travel straight up and straight down inclines. Never
make turns on the incline.
•Transporting loads across inclines, over ramps, on bumpy,
soft, or slippery surfaces reduces machine stability and lift
capacity. Transporting and lifting loads under these
conditions is extremely dangerous. Follow all transport
instructions in your power machine Operator’s Manual.
•When traveling on public roadways, travel in such a way
that faster moving vehicles may pass safely. Use accessory
lights, clean reflectors, and a slow moving vehicle sign that
is visible from the back to warn operators in other vehicles
of your presence. Always comply with all federal, state, and
local laws.
Combination Bucket Operation
WARNING
!
To avoid serious injury or death:
•Keep bystanders at a safe distance when entering and
picking up a load. Objects can shift or be thrown suddenly
as the bucket makes contact with the load causing serious
injury or death.
•Enter the pick-up zone carefully making sure no objects will
come back into the operator’s space causing serious injury
or death.
•Keep bystanders away while operating the attachment. A
person can become pinched or crushed as the attachment is
opened, closed, rotated, raised, or lowered.
•Read and understand all safety alerts under “Operating
Safety” on page 14.
Operating Tips
1. Go slowly when first learning how to operate the
bucket and loader.
2. Keep the work area small and travel distance short to
make the job more efficient.
3. When setting up a work site, choose a site that is
level, clear of low hanging electrical lines, and free of
obstructions such as trees, fences, and buildings.
4. Before and while backing-up, make sure visibility to
the rear is appropriate and the back-up area is clear
of pedestrians, animals, obstructions, drop-offs, etc.
5. When possible, save cycle time by making “skid”
turns going forward instead of backing up.
6. Reduce number of cycles by filling the bucket to rated
capacity.
7. Keep loaded bucket low to ground when transporting.
Always drive up and down slopes with load on the
uphill side. This will require backing down a slope to
keep load on the uphill side.
8. To keep material from spilling over the back, tilt top of
bucket forward to maintain bucket levelness while
raising loader arms or traveling up a slope.
9. To keep material from spilling over the front, tilt top of
bucket back to maintain bucket levelness while
lowering loader arms or traveling down a slope.
Digging With The Bucket
The bucket can be used for digging in the ground or into
piles of dirt, sand, and other similar materials.
1. Make sure load does not exceed rated lift capacity of
the skid steer.
2. Center skid steer on the material to be picked up.
IMPORTANT: Do not ram bucket into a pile or hook
a chain to the bucket to secure a load. Doing so can
damage the bucket.