Kubota LA1353 Instruction manual

LA1153, LA1353, WSM
SAFETY INSTRUCTIONS
SAFETY FIRST
This symbol, the industry's "Safety Alert Symbol", is used throughout this manual and on labels on
the machine itself
to warn of the possibility of personal injury. Read these instructions carefully.
It
is essential that you read the instructions and safety regulations before you attempt to repair or use
this unit.
• NOTE : Gives helpful information.
BEFORE SERVICING AND REPAIRING
• Read all instructions and safety instructions in this
manual and on your machine safety decals.
• Clean the work area and machine.
• Park the machine on a firm and level ground, and set
the parking brake.
• Lower the implement to the ground.
• Stop the engine. and remove the key.
• Disconnect the battery negative cable.
• Hang a
''~O NOT OPERATE" tag in operator
station.
A DANGER : Indicates an imminently hazardous situation which,
if not avoided, will result in
death
or serious injury,
A WARNING : Indicates a potentially hazardous situation which,
if not avoided, could result in
death or serious injury.
ACAUTION : Indicates a potentially hazardous situation which,
if not avoided, may result in
minor or moderate injury.
• IMPORTANT : Indicates that equipment
or property damage could result if instructions are not
followed.
1

LA1153. LA1353. WSM
SAFETY INSTRUCTIONS
•
+ -
SAFETY STARTING
• Do not start the engine by shorting across starter
terminals or bypassing the safety start switch.
• Do not alter or remove any part of machine safety
system.
• Before starting the engine, make sure that all shift
levers are
in neutral positions or in disengaged
positions.
• Never start the engine while standing
on ground.
Start the engine only from operator's
seat
SAFETY WORKING
• Do not work on the machine while underthe influence
of alcohol, medication, or other substances or while
fatigued.
• Wear close fitting clothing and safety equipment
appropriate to the job.
• Use tools appropriate to the work. Makeshift tools,
parts, and procedures are not recommended.
• When servicing is performed together by two or more
persons, take care to perform all work safely.
• Do not work under the machine that
is supported
solely by a jack. Always support the machine by
safety stands.
• Do nottouch the rotating or hot parts while the engine
is running.
• Never remove the radiator cap while the engine is
running, or immediately after stopping. Otherwise, hot
water will spout out from radiator. Only remove
radiator cap when cool enough to touch with bare
hands. Slowly loosen the cap to first stop to relieve
pressure before removing completely.
• Escaping fluid (fuel or hydraulic oil) under pressure
can penetrate the skin causing serious injury. Relieve
pressure before disconnecting hydraulic or fuel lines.
Tighten all connections before applying pressure.
AVOID FIRES
• Fuel is extremely flammable and explosive under
certain conditions. Do not smoke or allow flames or
sparks
in your working area.
• To avoid sparks from an accidental short circuit,
always disconnect the battery negative cable first and
connect it last.
• Battery gas can explode. Keep sparks and open
flame away from the top of battery, especially when
charging the battery.
• Make sure that no fuel has been spilled on the engine.
2

LA1153, LA1353, WSM
SAFETY INSTRUCTIONS
VENTILATE WORK AREA
• If the engine must be running to do some work, make
sure the area
is well ventilated. Never run the engine
in aclosed area. The exhaust gas contains poisonous
carbon monoxide.
PREVENT ACID BURNS
• Sulfuric acid in battery electrolyte is poisonous. It is
strong enough to burn skin, clothing and cause
blindness if splashed
into eyes. Keep electrolyte
away from eyes, hands
and clothing. If you spill
electrolyte
on yourself, flush with water, and get
medical attention immediately.
DISPOSE OF FLUIDS PROPERLY
• Do not pour fluids into the ground, down a drain, or
into a stream, pond, or
lake. Observe relevant
environmental protection regulations
when disposing
of oil, fuel, coolant, electrolyte
and other harmful
waste.
PREPARE FOR EMERGENCIES
• Keep a first aid kit and fire extinguisher handy at all
times.
• Keep emergency numbers for doctors, ambulance
service, hospital and fire department near your
telephone.
3

LA1153, LA1353, WSM
SAFETY INSTRUCTIONS
SAFETY DECALS
The following safety decals are installed on the machine.
If a decal becomes damaged, illegible or is not on the machine, replace
it. The decal part number is listed in
the parts list.
(1) Part No. 7J246-5641-1 (2) Part No. 7J246-5642-1
(3) Part
No. 7J417-7778-1
(M1858, M1859, M1864, M1865)
4FAAAAAAPOO2F
3FUAAAICP001A
4

LA1153, LA1353, WSM
SAFETY INSTRUCTIONS
(1) Part NO.7J246-5645-1 (2) Part No. 7J246-5644-2
(Both sides)
(3)
(3) Part No. 7J266-5649-2 (4) Part No. 7J417-9321-1
(M1866)
1AIABCFAP050A
3FUAAAICP002A
5

LA1153, LA1353, WSM
SAFETY INSTRUCTIONS
(1) Part No. 7J417-5643-1 (2) Part No. 75585-3619-3
A DANGER
(1)
1AIABBPAP0250
(3) Part No. 7J246-5643-1
-""'1- __ 1
A DANGER
CARE OF DANGER, WARNING AND CAUTION LABELS
1. Keep danger, warning and caution labels clean and free from obstructing material.
2. Clean danger. warning and caution labels with soap and water, dry with a soft cloth.
3. Replace damaged or missing danger. warning and caution labels with new labels from your local KUBOTA
Dealer.
4. If a component with danger, warning and caution label(s) affixed is replaced with new part, make sure new
label(s)
is (are) attached in the same location(s) as the replaced component.
5. Mount new danger, warning and caution labels by applying on a clean dry surface and pressing any
bubbles to outside edge.
3UFAAAICP003A
6

LA1153. LA1353. WSM
LOADER TERMINOLOGY
LOADER TERMINOLOGY
3UFAAAIDP001 A
(9)
(1) Mounting Pin (4) Boom Cylinder (6) Boom (8) Bucket
(2) Side Frame (5) Main Frame (7) Bucket Cylinder (9) Control Lever
(3) Hydraulic Control
Valve
7

LA1153, LA1353, WSM
SPECIFICATIONS
W1029088
SPECIFICATIONS
• Suitable Tractor
LA1153: M5040, M6040, M7040
LA1353: M8540, M9540
[1] LOADER SPECIFICATIONS
Loader Model LA1153 LA1353 !
Tractor Model M7040 M9540
Wheel Base 2050 mm (80.7 in.) 2250 mm (88.6 in.)
Front Tires 9.5-24 12.4-24
Rear Tires 16.9-30 18.4-30 I
Boom Cylinder Bore
Stroke
60
mm (2.36 in.)
570.5 mm (22.46 in.)
70 mm (2.76 in.)
606
mm (23.9 in.)
Bucket Cylinder Bore
Stroke
60 mm (2.36 in.)
507.5 mm (19.98 In.}
65
mm (2.56 In.)
512.5 mm (20.2 in.)
Control Valve One Detent Float Position, Power Beyond Circuit
Rated Flow
Maximum Pressure
42 Umin.
(11.1 U.S.gals/min., 9.2 Imp.gals/min.)
19.8 MPa (202 kgf/cm2
, 2873 psi)
64.3Umln.
(17.0 U.S.gals/min., 14.1 Imp.gals/min.)
20.7 MPa
(211 kgf/cm2
, 3002 psi)
Net Weight (Approximate) 700 kg (1543 Ibs) 840 kg (1852 Ibs)
W1027852
[2] BUCKET SPECIFICATIONS
Loader Model LA1153 I LA1353
Model ROUND 72" ROUND 84" LIGHT MATERIAL
84"
Type Quick Attach
Width 1830
mm (72.0 in.) 2135 mm (84.0 in.)
(L) 650 mm (25.59 in.) 750 mm (29.53 in.)
Height (M) 665 mm (26.18 in.) 715 mm (28.15 in.)
Length (N) 900 mm (35.43 in.) 1000
mm (39.37 in.)
Capacity Struck 0.44 m3 (15.5 cu.ft.) 0.52 m3 (18.4 cu.ft.) 0.63 m3 (22.3 cu.ft.)
Heaped 0.55 m3 (19.4 cu.ft.) 0.64 m3 (22.6 cu.ft.) 0.79 m3 (27.9 cu.ft.)
Weight 210
kg (463Ibs) 235 kg (518Ibs) 255 kg (562 Ibs)
Wl013973
L
M
i 3UFAAABDP002A
8

LA1153, LA1353, WSM
SPECIFICATIONS
[3] DIMENSIONAL AND OPERATIONAL SPECIFICATIONS
~V
u v
B A
~XX
C w x
J
zz
G
y Z
3UFAAABDP003A
• Dimensional Specifications
Loader Model LA1153 LA1353
Tractor Model M5040,M6040,M7040 M8540, M9540
BOOM CYLINDER FULCRUM POINT HEIGHT POWER
HEIGHT POWER
(A)
Maximum lift height to pivot pin 3370 mm
(132.7 in.)
2977mm
(117.2 in.)
3700 mm
(145.7 in.)
3350 mm
(131.9 in.)
(B) Maximum lift
height under level bucket
3131
mm
(123.3 in.)
2738 mm
(107.8 in.)
3420mm
(134.6 in.)
3090 mm
(121.7 in.)
(C) Clearance with
bucket dumped
2577 mm
(101.5 in.)
2172 mm
(85.5 in.)
2808 mm
(110.6 in.)
2405 mm
(94.7 in.) i
J
(D) Reach at maximum lift height
I
(Dumping Reach)
357mm
(14.1 in.)
811 mm
(31.9 in.)
738mm
(29.1 in.) 1149 mm
(45.2 in.)
(E) Maximum
dump angle 0.75 rad (43 0) 1.047 rad (60 0)
0.908 rad (52 ") 1.117 rad (64
0)
(F) Reach with
bucket on ground
1947 mm (76.7 in.) 2233 mm (87.9 in.)
(G) Bucket roll-back
angle
0.75 rad (43 0)
0.698 rad (40 ")
(H) Digging
depth
134 mm (5.3 in.) 111 mm (4.4 in.) 198 mm (7.8 in.)
185 mm (7.3 in.)
(J) Overall
height in carry position 1573
mm (61.9 in.) 1695
mm (66.7 in.)
W1013874
• Operational Specifications
Loader Model
Tractor Model
BOOM CYLINDER FULCRUM POINT
Lift capacity (Bucket bottom mid point)
(U) Lift capacity
(Bucket pivot pin, max. height)
(V) Lift capacity (800 mm forward, max. height)
(W) Lift capacity
(Bucket
pivot pin, 1500 mm height)
(X) Lift capacity
(800
mm forward, 1500 mm height)
(Y) Breakout force (Bucket pivot pin)
(Z) Breakout
lorce (800 mm forward)
(W) Bucket roll-back force at maxumum height
(XX) Bucket roll-back force at 1.5 m (59 in.)
(ZZ) Bucket roll-back force at
ground level
RaiSing time
Lowering time
i Bucket dumping time
Bucket roll-back time
LA1153
M5040, M6040, M7040
HEIGHT
POWER
1055 kg (2326Ibs) 1150 kg (2536 Ibs)
1120 kg
(2469 Ibs) 1328 kg (2928Ibs)
720 kg (1587Ibs) 830 kg (1830 Ibs)
1456
kg (3210 Ibs) 1672
kg (3686 Ibs)
1010 kg (2227 Ibs) 1200 kg (2646 Ibs)
18816 N (4230 Ibl) 23814 N (5354 Ibl)
12054 N (2710 Ibl)
15190 N (3415Ibl)
8722 N (1961 Ibf)
12054 N (2710 Ibl)
16072 N (3613 Ibl) 16611 N (3734 Ibf)
15288 N (3437 Ibl)
16415 N (3690 Ibf)
4.7 sec.
3.6 sec.
3.0 sec.
2.8 sec.
LA1353 i
M8540, M9540 i
HEIGHT
POWER
1300 kg (2866Ibs) 1350 kg (2976Ibs)
1810 kg (3990 Ibs) 1880 kg (4144Ibs)
1145 kg (2524 Ibs)
1295 kg (2855 Ibs) I
2070 kg (4563Ibs)
2330 kg (5137 Ibs) J
1535 kg (3384 Ibs) 1795
kg (3957Ibs) i
,
24470 N (5501 Ibl) 28780 N (6470 Ibf) !
16920 N (3804 Ibf) 21850 N (4912 Ibl)
12150 N (2731 Ibf) 14460 N (3250 Ibl)
23415 N (5264 Ibl) i
23365 N (5252 Ibl)
4.2 sec. i
2.9 sec. I
2.2 sec.
2.4 sec.
W1030299
9

MECHANISM
CONTENTS
1. CONTROL VALVE ASSEMBLY (LA 1153 STANDARD VALVE)................. M-1
[1] HYDRAULIC CiRCUiT.............................................................................. M-1
[2] STRUCTURE ............................................................................................. M-2
[3] OPERATION.............................................................................................. M-3
[4] RELIEF VALVE .........................................................................................M-9
2. CONTROL VALVE ASSEMBLY (LA1353 STANDARD VALVE)............... M-10
[1] HYDRAULIC CiRCUiT............................................................................M-10
[2] STRUCTURE........................................................................................... M-11
[3] OPERATION............................................................................................M-12
[4] RELIEF VALVE .......................................................................................M-18
3. SELF-LEVEL VALVE .................................................................................... M-21
[1] HYDRAULIC CiRCUiT............................................................................ M-21
[2] STRUCTURE...........................................................................................M-22
[3] OPERATION ............................................................................................M-23
[4] RELIEF VALVE .......................................................................................M-63
(1) Main Relief Valve ...............................................................................M-63
(2) Overload Relief Valve ........................................................................M-64
4. BOOM CYLINDER AND BUCKET CyLINDER..........................................M-66

LA 1153, LA 1353, WSM
FRONT LOADER
1. CONTROL VALVE ASSEMBLY (LA1153 STANDARD
VALVE)
[1] HYDRAULIC CIRCUIT
11)~
(2)
(3)"" I A1
B1 A2 B2
~------------------
i
(4) i
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pi
~ ________ ~~~Q=~±===-cc=~==~ ____ ~ -+
i i P.B.
i i
i i
i i
i
L_________________ _ ___________ j
i
3UFAAAILP029A (5) (6)
To operate the front loader, the hydraulic oil pressurized by the hydraulic pump flows from P portthrough the boom
control valve (5) and the bucket control valve (6) to P.B. port or T port.
(1) Boom Cylinder (4) Relief Valve
P: From Pump A1 : A1 Port
(2) Bucket Cylinder (5) Boom Control Valve T: ToTank
A2: A2 Port
(3) Control Valve Assembly (6) Bucket Control Valve P.B.:
To 3-Point Hydraulic B1 : B1 Port
System
B2: B2 Port
M-1

LA1153, LA1353, WSM
FRONT LOADER
[2] STRUCTU RE
(1 )
(4)
(2)
A1 B1
1------------'
i
i
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i
A2 B2
p~ir-~~~T---~~~--------.
" P.B.
(3)
(2) (3)
3UFAAAILP022A
(1) Inlet and Outlet Section P: P Port
A1 : A1 Port
B1 : B1 Port
(2) Boom Control Valva
T: T Port
A2: A2 Port
B2: B2 Port
(3) Bucket Control Valve
P.B. :P.B. Port
(4) Power Beyond
The control valve assembly is composed of one casting block and four major section as shown above.
(1) Inletand Outlet Section
This section has P and T ports.
The P port is connected to the OUTLET port of hydraulic block by the hydraulic hose.
The T port is connected to the
TANK port of hydraulic block bythe hydraulic hose.
(2) Boom Control Section
The boom control valve is of 4-position, 6-connection, detent, spring center type, conSisting of a mono block valve
housing, spool, load check valve, etc. This valve has A1 and
B1 ports and controls oil flow to the boom cylinder.
(3) Bucket Control Section
The bucket control valve is of 3-position, 6-connection, no detent, spring center type, consisting of a mono block
valve housing, spool, load check valve, etc. Thisvalve has
A2 and B2 ports and controls oil flow to the bucket cylinder.
(4) Power Beyond
This section has P.B. port which is connected to the INLETport of hydraulic block bythe hydraulic hose, and feeds
oil to the three point hydraulic control valve.
M-2

lAl153, LA1353, WSM
FRONT LOADER
[3] OPERATION
• Neutral
p
r-----------;f:-------------'------,
i
i
I
i
i
i
(7) I
I
I
I
I
!
I
1...- _______ _
(1 )
(2)
(3) A2 (6)
82
: (8)
3UFAAAllP023A (7)
(1) Boom Control Section (5) P.B. Passage 1
T; T Port B1 : B1 Port
(2) Bucket Control Section
(6) P.B. Passage 2
P: P Port B2; B2 Port
(3) Spool (7)
load Check Valve A1 : A1 Port P.B.:P.B. Port
(4) Spool (8) Relief Valve
A2: A2 Port (8) Low Pressure
M-3

LA1153, LA1353, WSM
FRONT LOADER
• Up
3UFAAAILP024A
~,u..w..u......L.I.w
I
i (1)
i
j
I
I
!
I...-~---~------
P.B.
-
-
T
0:(8)
i
i
i
i
i
iA1
iB1
i _E+-
i ....
j
(1)
(2)
.:(b)
P
r----------- ----------------.,
i
I
i
~
(1) Boom Control Section (5) Neutral Passage 1
P: P Port A1 : A1 Port
(2) Bucket Control Section (6) Load Check Valve
T: T Port (From Boom Cylinder)
(3) Spool (7) Passage 1
B1 : B1 Port (To Boom Cylinder)
(4) P.B. Passage 1 (8) Boom Cylinder P.B.:
P.B. Port
a: Low Pressure
b : High Pressure
1. When the hydraulic control lever is set to the "UP" position, the spool (3) of the boom control section (1) moves to
the left, which forms oil passages between passage 1 (7) and
61 port, and between A1 port and P .6. passage 1
(4).
2. As the oil passage from the neutral passage 1 (5) to the
PB passage 1 (4) is closed by the spool (3), the pressure-
fed oil from the P port opens the load check valve (6) and flows through the notched section of the spool (3) and
B1 port to extend the boom cylinder (8).
3. Return oil from the boom cylinder (8) flows from the A1 portthrough
the passage in the spool (3) and P .6. passage
1 (4) to the bucket control section (2).
M-4

LA1153, LA1353, WSM
FRONT LOADER
• Down
P.B.
i
i
!
I
i
i
I
L- _________ _
P.B.
-i
i
i
j
i A1
i B1
i
i
I
P
r---------- --------------ji
I
!
I
i
I~
(8)
I
: (a)
_:(b)
• 3UFAAAILP025A
(1) Boom Control Section (5) Neutral Passage 1
P: P Port A1 : A1 Port (To Boom Cylinder)
(2) Bucket Control Section (6) Load Check Valve
T: T Port B1 : B1 Port
(3) Spool (7) Passage 1 (From Boom Cylinder)
(4) P.B. Passage 1
(8) Boom Cylinder P.B.: P.B. Port
a :
Low Pressure
b : High Pressure
1. When the hydraulic control lever is set to the "DOWN" position, the spool (3) moves to the right, which forms oil
passages between passage 1 (7) and
A1 port, and between B1 port and P.B. passage 1 (4).
2. As the oil passage from the neutral passage 1 (5) to the PB passage 1 (4) is closed by the spool (3), the pressure-
fed oil from the P port opens the load check valve (6) and flows through the notched section of the spool (3) and
A1 port to retract the boom cylinder (8).
3. Return oil from the boom cylinder (8) flows from the B1 port through the passage in the spool (3) and P.B. passage
1
(4) to the bucket control section (2).
M-5

LA 1153, LA 1353, WSM
FRONT LOADER
• Floating
3UFAAAILP026A
r-----------
i
!
I
i
i
I
i
I
i
I
i
j
L..-~ ______ _
P
---------------l
P.B.
-
I
j
j
i
!A1
jB1
i "j!t'J--l--
l !
T
(1 )
1>,1:(a)
(1) Boom Control Section (5) Detent Mechanism
P: P Port A1 : A1 Port
(2) Bucket Control Section (6) Neutral Passage 1
T: T Port B1 : B1 Port
(3) Spool
(7) Boom Cylinder P.B.:
P.B. Port
(4) P.B. Passage 1 a :
Low Pressure
1. When the hydraulic control lever is set to the "FLOAT" position, the spool (3) moves further to the right from the
"DOWN" position and is retained by the detent mechanism (5).
2. This forms oil passages among the A1 port, B1 port and T port. As a result, oil in the boom cylinder (7) flows freely
from the A1 port and
B1 port through the T port to the transmission case.
3. Oil entering the P port flows to the bucket control section (2) through the neutral passage 1 (6) and P.B. passage
1 (4).
M-6

LA1153, LA 1353, WSM
FRONT LOADER
• Roll-back
P
r·_·_·_·_·_·-$-_·_·_-_·_·_· __ ·_··....,
i
i
i
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i
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!
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(9)
(1 )
(2)
3UFAAAILP027A : (a)
.:(b)
!II ..... =~J.=J.;-w I
_ !A2
i II~--~--~~~~
I -
iB2
L--~ ___ ,. ___ _
P.B.
T .J
(1) Boom Control Section
(6) P.B. Passage 2 P: P Port
B2: B2 Port
(2) Bucket Control Section (7) Load Check Valve T: T Port (To
Bucket Cylinder)
(3) P.B. Passage 1
(8) Passage 2 P.B.: P.B. Port 8 : Low Pressure
(4) Spool (9) Bucket Cylinder
A2: A2 Port b :
High Pressure
(5) Neutral Passage 2 (From
Bucket Cylinder)
1. When the hydraulic control lever is set to the "ROLL-BACK" position. the spool (4) of the bucket control section
(2) moves
to the left, which forms oil passages between passage 2 (8) and B2 port, and between A2 port and T
port.
2.
The pressure-fed oil from the P port flows to the neutral passage 2 (5) through the boom control section (1) and
P.B. passage 1 (3). As the oil passage from the neutral passage 2 (5) to the P.B. passage 2 (6) is closed
by the
spool (4). this oil opens the load check valve (7). and flows through the notched section
of the spool (4) and B2
port to retract the bucket cylinder (9).
3. Return oil from the bucket cylinder (9) flows to the transmission case through the A2 port and T port.
M-7

lA1153, lA1353, WSM
FRONT LOADER
• Dump
P
r-----------
-~-~- .. -~-~---- .. ....,
i
!
I i
i i
i i
i !
i
!
!
I (1) i
(9)
1)
(2)
_:(b)
3UFAAAILP028A
(1) Boom Control Section (6)
P.B. Passage 2
P: P Port A2: A2 Port
(2) Bucket Control Section (7) Load Check Valve
T: TPort
(To BucketCylinder)
(3) P.B. Passage 1 (8) Passage 2
P.B.: P.B. Port
B2: B2 Port
(4) Spool (9) Bucket Cylinder (From Bucket Cylinder)
(5) Neutral Passage 2
b: High Pressure
(7)
i
i
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i
L __ ___ .. __
-
~_~
P.B.
-I
i
iA2
iB2
__ J
T
1. When the hydraulic control lever is set to the "DUMP" position, the spool (4), which forms oil passages among
passage 2 (8),
A2 port and 82 port.
2. The pressure-fed oil from the P port flows to the A2 port just like the
"DUMP" position.
3. Return oil from the bucket cylinder (9) flows from the 82 port to the passage 2 (8), and flows to the A2 port together
with the pressure-fed oif from the P port.
As a result, the dump speed is increased.
(Reference)
• The oil pressure of the A2 port and 82 port is identical, butthe bucket cylinder extend bythe difference of received
pressure area (cylinder rod part).
M-8