Kubota LA434 User manual

Kubota
Brand
Kubota
Model
LA434
Category
Lawnmowers
Type
User manual
OPERATOR'S
MANUAL
KUBOTA
FRONT
LOADER
MODEL
LA434
1AIABCPAP0350
READ
AND
SAVE
THIS
MANUAL
Kubol-o
ABBREVIATION
LIST
Abbreviations
Definitions
2WD
2-Wheel
Drive
4WD
4-Wheel
Drive
API
Annerican
Petroleum
Institute
ASABE
American Society of Agricultural
and
Biological Engineers, USA
ASTM
American Society of Testing
and
Materials, USA
DIN
Deutsches
Institut fiir Normung, GERMANY
DT
Dual Traction [4WD]
fpm
Feet
Per
Minute
GST
Glide
Shift
Transmission
Hi-Lo
High
Speed-Low
Speed
HST
Hydrostatic
Transmission
m/s
Meters
Per
Second
PTO
Power
Take
Off
RH/LH
Right-hand
and
left-hand
sides
are
determined by facing in the
direction
of
forward
travel
ROPS
Roll-Over
Protective
Structures
rpm
Revolutions
Per
Minute
r/s
Revolutions
Per
Second
SAE
Society of Automotive Engineers, USA
SMV
Slow Moving Vehicle
FOREWORD
You
are now the proud owner of a
KUBOTA
Loader. This loader is a product of
KUBOTA
quality engineering and manufacturing.
It
is made of fine materials and
under a
rigid
quality control system.
It
will
give you
long,
satisfactory service. To
obtain the best use of your loader, please read this manual carefully. Ifyour tractor
is provided
with
CAB,
also read the
CAB
operator's manual, which is a separate
manual. It
will
help you become familiar with the operation of the loader and
contains many helpful hints about loader maintenance. It is
KUBOTA's
policy to
utilize
as
quickly
as
possible every advance in our research. The immediate use of
new techniques in the manufacture of products may
cause
some
small parts of this
manual
to
be
outdated.
KUBOTA distributors
and
dealers
will
have
the
most
up-to-
date
information.
Please
do
not
hesitate
to
consult
with
them.
A
SAFETY
FIRST
This symbol, the industry's "Safety Alert Symbol", is
used
throughout this manual
and on labels on
the
mower itself to warn of the possibility of personal injury. Read
these
instmctions carefully. It is essential that you read the instructions and safety
regulations before you
attempt
to
assemble
or
use
this unit.
DANGER:
Indicates
an
imminently
hazardous
situation which, if
not
avoided,
will
result in
death
or serious injury.
WARNING
:
Indicates
a potentially
hazardous
situation
which, if
not
avoided, could result in
death
or
serious
injury.
CAUTION
:
Indicates
a
potentially
hazardous
situation
which,
if
not
avoided, could result in minor or moderate injury.
IMPORTANT:
Indicates that equipment or property
damage
could result if
instructions
are
not
followed.
NOTE:
Gives
helpful information.
ASAFE
OPERATION
A-1
SERVICING
OF
LOADER 1
SPECIFICATIONS
2
SUITABLE
TRACTOR
2
LOADER
SPECIFICATIONS
2
BUCKET
SPECIFICATIONS
3
DIMENSIONAL
SPECIFICATIONS
3
OPERATIONAL
SPECIFICATIONS
4
LOADER
TERMINOLOGY
6
PRE-OPERATION
CHECK
7
LUBRICATION
7
TRANSMISSION
FLUID
7
REAR
BALLAST
8
Liquid
ballast
in
rear
tires
8
TIRE
INFLATION
9
Inflation
pressure
9
TEST
OPERATION
9
4 Position
bucket
control valve
type
9
REMOVING
AIR
FROM
THE
HYDRAULIC
SYSTEM
9
DUAL
REMOTE
HYDRAULIC
CONTROL
SYSTEM
10
Control Lever
and
Hydraulic
Hose
Connections
10
Loader
/
Remote
Control
Valve
Lever
10
OPERATING
THE
LOADER
11
FILLING
THE
BUCKET
11
LIFTING
THE
LOAD
11
CARRYING
THE
LOAD
12
DUMPING
THE
BUCKET
12
LOWERING
THE
BUCKET
12
OPERATING
WITH
FLOAT
CONTROL
12
LOADING
FROM
A
BANK
13
PEELING
AND
SCRAPING
13
LOADING
LOW
TRUCKS
OR
SPREADERS
FROM
A
PILE
14
BACKFILLING
14
HANDLING
LARGE
HEAVY
OBJECTS
15
VALVE
LOCK
15
FRONT REMOTE HYDRAULIC CONTROL SYSTEM (if
equipped)
16
Install the Coupler 16
Control
Switch
16
Remote Control Coupler Connecting and Disconnecting 17
ATTACHING
ATTACHMENTS
18
DETACHING
ATTACHMENTS
20
DISMOUNTING
THE
LOADER
20
ATTACHMENTS
20
Bucket
20
CONTENTS
Pallet
fork
21
Snow
blade
21
ASSEMBLE
PALLET
FORK
21
MAINTENANCE
23
LUBRICATION
23
RE-TIGHTENING
OF
HARDWARE
23
DAILY
CHECKS
24
EVERY
50
HOURS
25
Checking main frame bolt
and
nut
torque
25
General
torque
specification
26
REMOVING
THE
LOADER
27
STORING
THE LOADER
29
REINSTALLING THE LOADER
30
SAFE
OPERATION
Most loader equipment accidents can be avoided by following simple safety precautions.
These safety precautions, iffollowedat alltimes,
will
help you operate your loader safely.
1.
BEFORE
OPERATING
THE
LOADER
1.
Read
and
understand
all
instructions
and
precautions
found in both
the
tractor
and
the
loader
operator's
manuals
before
using
the
loader.
Lack of
knowledge
can
lead
to
accidents.
2. It is
the
owner's
responsibility to
ensure
that
anyone
who
will
operate
the
loader
reads
this manual first
and
becomes
familiar with
the
safe
operation of
the
loader.
3. For your safety, a
ROPS
with a
seat
belt is strongly
recommended
by KUBOTA in
almost
all applications.
Ifyour tractor
has
a foldable ROPS, fold it down only
when
absolutely
necessary
and
raise
it up
and
lock it
again
as
soon
as
possible. Do not
wear
the
seat
belt
when
a
foldable
ROPS
is
down
or
a
fixed
ROPS
is
removed. Ifyou
have
any
questions,
consult your local
KUBOTA
dealer.
Always
use
the
seat
belt
when
the
tractor
is
equipped
with
a
ROPS.
Never
use
the
seat
belt
when
the
tractor
is not
equipped
with a
ROPS.
4. Visually
check
for hydraulic
leaks
and
broken, missing,
or malfunctioning
parts.
Make
necessary
repairs
before
operating.
5.
Replace
damaged
or illegible
safety
labels.
See
following
pages
for required labels.
6.
When
the
front
loader
is
mounted
on
the
tractor,
enter
and
exit
the
operator's
seat
only from left
side
of
the
tractor.
7.
Engage
the
loader
control valve lock to
prevent
accidental
actuation
when
the
implement
is
not
in
use
or during
transport.
Do not utilize
the
valve
lock for
machine
maintenance
or
repair.
8. Assemble, remove
and
reinstall
the
loader only
as
directed
in
this
manual.
Failure
to
do
this
could
result
in
serious
personal
injury
or
death.
9. Follow
the
precautions below when attaching
attachments.
•
Make
sure
both
handles
(LH, RH)
contact
the
ear
plates
at
the
points (A)
and
are
all
the
way
down.
• Make
sure
both lock pins (LH, RH) protrude through
the
pin
slots.
•
Kubota
recommends
the
use
of
Kubota
attachments
on
Kubota
loaders.
Non-Kubota
attachments,
if
used,
must
comply
with ISO
24410,
first edition
2005-04-15.
•
Use
of a non-Kubota
attachment
that
does
not comply
with ISO
24410
or
the
improper positioning of
handle(s) or non-protrusion of pin(s) may result in
detachment
of
the
attachment
or deformation,
causing
loss
of performance,
personal
injury or
death.
1AIABDDAP015A
(1)
Handle
(2)
Ear
plate
(3)
Pin
slot
(4)
Lock
pin
SAFE
OPERATION
A-1
(A)
The
handle
contacts
the
ear
plate
at
the
points.
A-2
SAFE
OPERATION
2.
OPERATING
THE
LOADER
1.
6.
7.
8.
Operate
the
loader
only
when
properly
seated
at
the
controls. Do
not
operate
from
the
ground.
Move
and
turn
the
tractor
at low
speeds.
Never
allow
anyone
to
get
under
the
loader
bucket
or
reach
through
the
boom
when
the
bucket
is
raised.
Keep
children,
others
and
livestock
away
when
operating
loader
and
tractor.
Do
not
walk
or
work
under
a
raised
loader
bucket
or
attachment
unless
it is
securely
blocked
and
held in
position.
For
tractor
stability
and
operator
safety,
rear
ballast
must
be
added
to
the
3-point
hitch
and
to
the
rear
wheels
when
using
loader.
To
increase
stability
adjust
the
rear
wheels
to
the
widest
setting
that
is
suitable
for your application.
Exercise
extra
caution
when
operating
the
loader
with
a
raised
bucket
or
attachment.
9. Do
not
lift or
carry
any
person
on
the
loader,
in
the
bucket,
or
other
attachment.
10.Avoid
loose
fill,
rocks
and
holes.
They
can
be
dangerous
for
loader
operation or movement.
11
.Avoid
overhead
wires
and
obstacles
when
the
loader
is raised. Contacting electric lines
can
cause
electrocution.
12. Gradually
stop
the
loader boom when lowering or
lifting.
13.
Use
caution
when
handling
loose
or shiftable loads.
14.Using loaders for handling large, heavy, or shiftable
objects is not
recommended
without proper handling
attachments.
15. Handling large heavy objects
can
be extremely
dangerous
due
to:
•
Danger
of rolling
the
tractor over.
•
Danger
of upending
the
tractor.
• Danger of the object
rolling
or sliding down the
loader
boom
onto
the
operator.
16. Ifyou must perform this sort of work (item 15), protect
yourself
by:
• Never
lift
the
load higher
than
necessary
to clear
the
ground.
• Add
rear
ballast
to
the
tractor
to
compensate
for
the
load
or
use
rear
implement.
• Never
lift
large objects with equipment
that
may
permit
them
to roll
back
onto
the
operator.
• Move slowly
and
carefully, avoiding rough terrain.
17. Never
lift
or pull a load from any point on
the
loader
with a chain, rope, or cable. Doing
so
could
cause
a
rollover or
serious
damage
to
the
loader.
18. Be extra careful
when
operating
the
tractor on a slope,
always operate up and down, never
across
the slope.
Do not operate on
steep
slopes
or unstable surfaces.
19.
When
operating
another
implement on a hillside, be
sure
to
remove
the
loader
to
reduce
the
risk
of
rollover.
20. Carry loader boom at a low position during transport.
(You should be able to
see
over the bucket.)
21.Allow for
the
loader
length
when
making turns.
3.
AFTER
OPERATING
THE
LOADER
1.
When
loader
work
is
complete
and
parking
or
storing,
choose
flat
and
hard
ground.
Lower
the
loader
boom
to
the
ground,
stop
the
engine,
set
the
brakes
and
remove
the
key
before
leaving
the
tractor
seat.
2.
Make
sure
the
detached
loader
is
on
stands
and
on
a
hard,
level
surface.
3. Before disconnecting hydraulic lines, relieve all
hydraulic
pressure
by moving
the
controls.
4.
Do
not
remove
the
loader
from
the
tractor
without
an
approved
bucket
attached.
4.
SERVICING
THE
LOADER
1. Always
wear
safety
goggles
when
servicing or
repairing
the
machine.
2. Do not modify
the
loader. Unauthorized modification
may affect
the
function of
the
loader, which may result
in
personal
injury.
3. Do
not
use
the
loader
as
a work platform
or
a
jack
to
support
the
tractor
for servicing
or
maintenance.
Securely
support
the
tractor or
any
machine
elements
with
stands
or
suitable
blocking
before
working
underneath.
For your safety, do not work under
any
hydraulically
supported devices. They
can
settle or suddenly leak
down
or
be
accidentally
lowered.
4. Escaping hydraulic oil under pressure
can
have
sufficient force to
penetrate
the
skin,
causing
serious
personal injury. Do not
use
hands to
search
for
suspected
leaks. If injured by escaping
fluid,
obtain
medical
treatment
immediately.
5. Do not tamper with the relief valve setting. The relief
valve is pre-set at the factory. Changing the setting
can
cause
overloading of
the
loader
and
tractor which
may result in serious personal injury.
6. When servicing or replacing pins in cylinder ends,
bucket, etc., always
use
a
brass
drift
and
hammer.
Failure to do
so
could result in injury from flying metal
fragments.
DANGER,WARNING
AND
CAUTION
LABELS
1AIABCPAP012B
1AIABCPAP013A
(3)
Part
No.
7J061-5649-1
(4)
Part
No.
7J246-5642-1
AWARNING
TO
AVOID
INJURY
FROM
CRUSHING
:
i.Do
not utilize the valve lock for
machine
maintenance
or
repair.
z.The
valve
lock
is to
prevent
accidental
actuation
when
implement
isnotinuseor
during
transport.
1AIABACAP084A
A
DANGER
TO
AVOID
SERIOUS INJURY
OR
DEATH
CAUSED BY
CONTACT
WITH
ELECTRIC
UNES:
•
Check
overhead
clearance.
1AIABAHAP018A
SAFE
OPERATION
A-3
(1)
Part
No.
7J246-5643-1
(2)
Part
No.
7J246-5641-1
A
DANGER
TO AVOID SERIOUS INJURY
OR DEATH CAUSED BY
FALLING LOADS:
1.
Load
on
raised
bucket
or
fork
can
fall
or
roll
back
onto
operator
causing
serious
injury or death.
2. Use approved clamping and
/ or guard attachments for
handling large, loose or
shiftable
loads
such
as
bales,
posts,
sheets
of plywood etc.
3. Carryloads as lowas possible.
1AIABAHAP016A
(5)
Part
No. 7J061-5645-1
AWARNING
TO
AVOID
PERSONAL
INJURY:
1.
Observe
safety
precautions
in
loader
and
tractor
Operator's
Manual.
2.
Operate the
loader
from
tractor
seat
only.
3. Keep
children,
others
and
livestock
away
when
operat
ing
loader
and
tractor.
4. Avoid holes,
loose
ground,
and
rocks
which
may
cause
tractor
/
loader
to tip.
5. Make
sure
approved
bucket
is
attached
before
removing
loader
from
tractor.
6.
When
parking
or
storing,
choose
flat
and
hard
ground.
Lower
the
bucket
to
the
ground,
set
brakes
and
remove
key
before
leaving
tractor.
7. Before
disconnecting
hydrau
lic lines, relieve all hydraulic
pressure.
1AIABAHAP043A
A
DANGER
TO AVOID
SERIOUS
INJURY
OR DEATH
CAUSED
BY
ROLLOVERS:
1.
ROPS
and
a
fastened
seat
belt
are strongly recommended in
almost allapplications. Foldable
ROPS
should be in upright and
lockedposition ifequipped.
2. Adjust rear wheels to the widest
setting that is suitable for
the
work.
3.
Add
recommended
wheel
ballast and rear weight for
stability.
4. DO
NOT
drive on steep slopes
or
unstable
surfaces.
5. Carry loader arms at low
position during transport.
IVlove
and
turn
tractor
at
slow
speeds.
1AIABAHAP017A
(6)
Part
No.
7J246-5644-2
(Both
sides)
AWARN
NG
a
TO
AVOID
INJURY
FROM
FALLS
OR
BEING
CRUSHED
:
1. DO NOT
stand
or
work
under
raised
loader
or
bucket.
2.
DO
NOT
use loader as jack
for servicing.
3. DO NOT
use
loader
as
a
work
platform.
4.
NEVER
connect chain, cable
or
rope
to
loader
bucket while
operatinq
loader.
1AIABAHAP020A
A-4
SAFE
OPERATION
(1)
Part
No.
7J802-3648-5
ADANGER
VOID
PERSONAL
INJURY
OR
DEATH
Make
sure
both
handles
ILH,
RH)® contactthe
earplates(B) at the
Sic
points and are all
the way
down.
2.Make
sure
both
lock
pins
(LH,
RH)©
protrude through the
Kubota recommends the use of Kubota Use ofa non-Kubotaattachment that does i
attachments
on
Kubota
loaders withISO 24410 or the improper posit
Non-Kubotaattachments, ifused, handle(s)or
non-protrusion
ofpin(s)ma
must complywith ISO24410, first
detachment
ofthe
attachment
or
deformatio
edition 2005-04-15. lossof
performance,
personal
injury
ordeat
1AIABAAAP119A
(2) Part No.7J246-5643-1 (3) Part
No.
7J048-3923-5 [B2366QuickCoupler]
A
DANGER
TO
AVOID
SERIOUS INJURY
OR DEATH CAUSED BY
FALLING LOADS:
1.
Load
on
raised
bucket
or
fork
operator
causing
serious
injury or death.
2. Use approved clamping and
/ or guard attachments for
handling large,
loose
or
shiftable
loads
such
as
bales,
posts,
sheets
of plywood etc.
1AIABACAP075A
ADANGER
PALLET
FORK
RATED
CAPACITY
Rated capacity
U«3,LA504,Ui534
:600 LBS.
:390
LBS.
LA434
TO
AVOID
PERSONAL
INJURY
OR
DEATH
CAUSED
BY
ROLLOVER
•Do
not
exceed
rated
load
listed
above.
•Use
rear
implement
and
tire
ballast
recommended
in
loader
operator's
manual.
•Operate
tractor
slowly
taking
special
care
when
turning.
1AIABDDAP008G
1AIABDDAP018B
[B2376
Pallet
Fork]
1AIABDDAP035A
1AIABCPAP030A
SPECIFICATIONS
SPECIFICATIONS
SUITABLE
TRACTOR
LA434:
B2301,
B2601
LOADER
SPECIFICATIONS
LOADER
MODEL
LA434
TRACTOR
MODEL
B2301,
B2601
WHEEL BASE (WB)
mm (in.)
1563
(61.5)
FRONT
TIRES
7-12
REAR
TIRES
11.2-16
BOOM
CYLINDER
BORE
mm (in.)
45(1.77)
STROKE
mm (in.)
349(13.7)
BUCKET
CYLINDER
BORE
mm (in.)
45
(1.77)
STROKE
mm (in.)
336(13.2)
CONTROL
VALVE
One
Detent Float Position, Two
Stage
Bucket Dump,
Power
Beyond Circuit
RATED
FLOW
L/min (GPM)
17.9
(4.7)
MAXIMUM
PRESSURE
MPa (kg/cm', psi)
13.8
(141,2000)
NET WEIGHT (APPROXIMATE)
kg (lbs.)
208
(459)
2000
1500
E
B
2
1000
?
(D
X
500
\\
*
pivot
pin
\^^500\
of pi\
Tim
fon/vard
/ot pin
* \
\ \
1500
1AIABCPAP016A
500
1000
Lift
Capacity
(kg)
2000
1500
E
E
r
1000
0
I
500
SPECIFICATIONS
5
10
Rollback
Force
(kN)
15
6
SPECIFICATIONS
LOADER
TERMINOLOGY
Q
1AIABCPAP031A
(1)
Side
frame
(6)
(2)
Loader
control
lever
(7)
(3)
Mounting
pin
(8)
(4) Main
frame
(9)
(5)
Boom
cylinder
1AIABCPAP029A
PRE-OPERATION
CHECK
PRE-OPERATION
CHECK
LUBRICATION
Lubricate all
grease
fittings with SAE multipurpose
grease.
1AIABCPAP017A
[Quick
coupler
type
(Option)]
4FAAABXAP144A
TRANSMISSION
FLUID
Check
the
tractor
transmission
fluid
level.
Add
fluid if
necessary.
Refer to
the
tractor operator's manual for
instructions
and
proper fluid.
Repeat
this
check
after
purging air from
the
system.
At that time, it
will
be
necessary
to
add
transmission
fluid.
1AIABDDAP021A
(1)Dipstick(Rear)
(A)
Oillevelis acceptable
within
thisrange.
(2) Oil inlet
IMPORTANT:
• To
check
the
tractor
transmission
fluid level, lower
the
bucket to the ground and lower
the
3 point hitch.
8
PRE-OPERATION
CHECK
REAR
BALLAST
A
WARNING
To
avoid
serious
injury:
•
For
tractor
stability
and
operator's
safety,
rear
ballast
should
be
added
to
the
rear
of
the
tractor
in
the
form
of
3-point
counter
weight
and
rear
wheel
ballast.
The
amount
of
rear
ballast
will
depend
on
the
application.
Implement
as
Counter Weight
LA434
Box
Blade
Approx. 170 kg (375 lbs.)
Rear
Blade
Approx. 160 kg (350 lbs.)
Rotary Tiller
Approx.
195
kg (430 lbs.)
Back
Hoe
Approx.
320
kg (700 lbs.)
*When
filling
15-19.5 tires with water,
the
counter weight
should
be
approx.136 kg (300 lbs.) in weight.
•Liquid
ballast
in
rear
tires
Water
and
calcium chloride solution provides a
safe
and
economical ballast.
Used
properly, it
will
not
damage
tires,
tubes
or
rims.
The
addition
of
calcium
chloride
is
recommended
to prevent
the
water
from freezing. Use of
this
method
of weighting
the
wheels
has
full approval of
the
tire
manufacturers.
See
your tire
dealer
for this
service.
Liquid weight
per
tire (75
Percent
filled)
Tire
sizes
9.5-16
11.2-16
12.4-16
15-19.5
Slush
free
at
-10r(14T)
Solid
at-30X:{-22T)
[Approx. 1 kg (2 lbs.)
CaClz
per4L(1
gal.) of
water]
54 kg
(119 lbs.)
70 kg
(155 lbs.)
85kg
(187
lbs.)
140kg
(309
lbs.)
Slush
free
at
-241:
(-11
T)
Solid at
-47t:(-53T)
[Approx. 1.5 kg (3.3
lbs.) CaClz
per4
L
(1 gal.) of water]
57
kg
(126
lbs.)
74 kg
(163
lbs.)
89 kg
(196
lbs.)
150
kg
(331 lbs.)
Slush
free
at
-47
X:
(-53
T)
Solid
at-52(-62
T)
[Approx.
2.25
kg
(5 lbs.) CaClz
per4L
(1 gal.) of
water]
60 kg
(132
lbs.)
78 kg
(172
lbs.)
94kg
(207
lbs.)
160kg
(353
lbs.)
IMPORTAIMT:
•
Do
not
fill
tires
with
water
or
solution
more
than
75%
of
full
capacity
(to
the
valve
stem
level
at
12 o'clock
position).
1AIABACAP010A
(1)Air
(2)
Water
(A)
Correct:
75%
Full
Air
compresses
like a
cushion
(B) Incorrect: 100% Full
Water
can
not
be
compressed
NOTE:
•
When
mounting a
heavy
rear
implement, liquid in
the
tires
may
not
be
required.
IMPORTAIMT:
• Do not
add
liquid ballast or
any
other
weights
to
the
front
tires.
• While
the
backhoe
is installed on
the
tractor,
the
liquid
ballast
in
the
rear
tires
should
be
removed.
•
When
filling
15-19.5 tires with water,
the
counter
weight should be
between
91 kg
and
182 (200 lbs
and
400
lbs.) in weight.
TIRE
INFLATION
Ensure
that
the
tractor tires
are
properly inflated.
Refer
to
the
tractor
operator's
manual
for optional tires.
•Inflation
pressure
Tire
sizes
Inflation
Pressure
9.5-16,
4PR
140kPa(1.4kgf/cm^ 20psi)
11.2-16,4PR
130kPa(1.3kgf/cm^ 18psi)
Rear
12-
16.5,4PR
270kPa(2.7kgf/cm^ 40psi)
31x15.5-15,
4PR
140kPa(1.4kgf/cm^ 20psi)
33x12.5-15,
4PR
140kPa{1.4kgf/cm', 20psi)
6-12,
4PR
200kPa(2.0kgf/cm^ 28psi)
7-12,
4PR
170kPa(1.7kgf/cm^ 24psi)
Front
21x8.00-10,
4PR
160kPa(1.6kgf/cm', 23psi)
23x8.50-12Turf,
4PR
150kPa(1.5kgf/cm^ 22psi)
23x8.50-12lnd..4PR
250kPa(2.5kgf/cm^ 35psi)
TEST
OPERATION
A
WARNING
To
avoid
serious
personal
injury:
Keep
engine
speed
at
low
idle
during
the
test
operation.
Escaping
hydraulic
fluid
under
pressure
can
have
sufficient
force
to
penetrate
skin,
causing
serious
personal
Injury.
Before
disconnecting
lines,
be
sure
to
relieve
all
pressure
by
moving
the
controls.
Before
applying
pressure
to
the
system,
be
sure
ail
connections
are
tight
and
that
lines,
tubes
and
hoses
are
not
damaged.
Fluid
escaping
from
a
very
small
hole
can
be
almost
Invisible.
Use
a
piece
of
cardboard
or
wood,
rather
than
your
hands
to
search
for
suspected
leaks.
If
injured
by
escaping
fluid,
see
a
doctor
at
once.
Serious
infection
or
allergic
reaction
will
develop
If
proper
medical
treatment
is
not
administered
immediately.
PRE-OPERATION
CHECK
1AIABACAP011B
NOTE:
•
When
the
lever is
at
each
comer
position
marked
by
asterisk (*) or lower left, boom
and
bucket cylinders
work
at
the
same
time. However,
the
lower left position
(Raise
& Roll back) is not
recommended
for
scooping
because
of
insufficient
lift
force.
To begin a
test
operation, slightly
move
the
control lever
from the "N" position. Slowly raise the loader boom just
enough
for
the
bucket to
clear
the
ground when fully
dumped.
Slowly work through
the
dump
and
roll
back
cycles.
IMPORTANT:
• If
the
boom
or
bucket
does
not
work
in
the
directions
indicated on
the
label, lower
the
bucket
to
the
ground,
stop
the
engine,
and
relieve all hydraulic
pressure.
Recheck
and
correct
all hydraulic
connections
and
oil
level.
•4
Position
bucket
control
valve
type
This control valve
has
two
stage
dump
positions.
The
first
dump position by moving
the
lever to
the
right
features
greater
speed
for dumping.
The
second
dump
position (to further right) is
the
"Regular"
dump
position. It
has
good
power
and
control
for dumping precisely. This position
should
be
used
when
operating
another
implement
with
this
control valve.
These
two positions
are
separated
by a "Feel" position for
your
convenience.
REMOVING
AIR
FROM
THE
HYDRAULIC
SYSTEM
Repeat
raising
and
lowering
the
boom
and
bucket
operations
until all
the
air is
removed
from
the
system
and
the
system
responds
properly.
IMPORTANT:
• Do not move
the
control lever into
the
float position
when
the
bucket
is off
the
ground.
10
PRE-OPERATION
CHECK
DUAL
REMOTE
HYDRAULIC
CONTROL
SYSTEM
The
tractor is equipped with the double-acting 2-segment
hydraulic control
valve
for front
loader.
To apply
the
hydraulic power take-off for general
attachments,
keep
the
following point in mind.
•Control
Lever
and
Hydraulic
Hose
Connections
Connect
the
control
lever
in its specified direction
and
the
hydraulic
hoses
to their specified ports.
White
©
[C] Blue
[B]Yellow
1AGAECDAP004B
(1)
Loader/Remote
control valve
lever
(R) "RIGHT"
(L) "LEFT"
(U) "UP"
(D) "DOWN"
Pressure
Hydraulic
outlet ports of
first
segment Returning
Lever
UP
DOWN
Port
[A]
In
4—
Out
—1>
[B]
Out
—>
In
i—
Hydraulic outlet ports of
second
segment
Lever
RIGHT
LEFT
Port
[C]
In
i—
Out
—0
[D]
Out
—0
In
i—
IMPORTANT:
To avoid
damage
of
the
attachments:
• Do not
connect
attachments
through
the
hydraulic
motor to
the
[C]
and
[D] ports. If
the
control lever is
moved
to
the
Regeneration
position (R1),
the
seals
on
the
hydraulic motor
will
be
damaged.
• This control valve is provided with
the
Regeneration
position.
When
the
[C]
and
[D] ports
are
used
to
take
off hydraulic power for
the
hydraulic cylinder, be
sure
to
connect
the
[C] port to
the
"Head-End"
side
port of
the
hydraulic cylinder.
• Make
the
following
connections
when
using this valve
to
take
off hydraulic power for
the
hydraulic cylinder.
Colored
Coupler
Hydraulic Cylinder port
[B: Yellow], [C: Blue]
Head-End
side
[A: White], [D:
Red]
Rod-End
side
•Loader
I
Remote
Control
Valve
Lever
1. Before moving
the
lever,
make
sure
that
the
hydraulic
hoses
for
attachments
are
connected.
2. Move
the
lever diagonally (a, b, c shown in
the
figure),
and
the
first
and
second
segments
can
be
controlled
at
once.
1AGAECDAP009F
NOTE:
• Move
the
lever to
the
"FLOAT' position,
and
it will
be
held
there
by
the
detent
mechanism.
To
use
the
valve
as
a floating valve with detents,
connect
the
hydraulic
hoses
to
ports
[A]
and
[B].
•
When
taking off hydraulic
power
from port [D],
the
flow
rate
can
be
adjusted
in 2
stages
with
the
lever.
The
flow
rate
is high
at
position (R1)
and
low
at
position (R2).
Move
the
lever
to position (R1)
or
(R2)
depending
on
the
attachment
in
use.
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Kubota LA434 User manual

Kubota
Brand
Kubota
Model
LA434
Category
Lawnmowers
Type
User manual
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