Kubota Tractors Shop Manual
WORKSHOP MANUAL
KiSC issued 06, 2006 A
TRACTOR
MECHANISM
KiSC issued 06, 2006 A
TO THE READER
KiSC issued 06, 2006 A
The main purpose of this manual is to train the servicin g pers onnel s o that he / sh e
can understand and service Kubota machines with speed.
This manual is also a n excellent reference for the trained mechanic who wan ts to
refresh his memory on Kubota machines.
All information and illustrations contained in this manual are based on the latest
product information available at the time of publication.
The right is reserved to make changes in all information at any time without notice.
NOTE: The chapter of the engi ne is not included in this manu al. Refer to workshop
manual of diesel en gine me chani sm (C ode No. 9Y 021- 01873 or 97 897-6 0812
CD-ROM Version).
The peculiar one to the s pecified model such as transmis sion cross section,
schematic of hydraulic circuit and electrical circuit are not described in this
manual. Please refer to each workshop manual according to the tractor model.
October 2001
© KUBOTA Corporation 2001
KiSC issued 06, 2006 A
1 ENGINE
KiSC issued 06, 2006 A
2 CLUTCH
KiSC issued 06, 2006 A
MECHANISM
KiSC issued 06, 2006 A
CONTENTS
1. DRY TYPE, SINGLE PLATE CLUTCH......................................................2-M1
2. DRY TYPE, DUAL STAGE CLUTCH.........................................................2-M2
3. HYDRAULIC MULTIPLE DISC CLUTCH....................................................2-M4
[1] TYPE 1 (For Travelling) ......................................................................... 2-M4
[2] TYPE 2 (For PTO)..................................................................................2-M5
TRACTOR, WSM
KiSC issued 06, 2006 A
1. DRY TYPE, SINGLE PLATE CLUTCH
■ Clutch “Engaged”
When the clutch peda l is not depressed, the clutch
release bearing (9) a nd the finger s of diaphragm spring
(5) are not connected to each other.
Accordingly, the pressure plate (4) is tightly pressed
against the flywheel (1) by the diaphragm spring (5). As
a result, rotation of the fly wheel (1) is trans mitted to the
transmission through the clutch shaft (10) due to the
frictional force among the flywheel (1), clutch disc (2) and
pressure plate (4).
(1) Flywheel
(2) Clutch Disc
(3) Clutch Cover
(4) Pressure Plate
(5) Diaphragm Spring
CLUTCH
(6) Release Fork
(7) Clutch Rod
(8) Release Hub
(9) Release Bearing
(10) Clutch Shaft
W10126980
■ Clutch “Disengaged”
When the clutch pedal is depressed, the clutch pedal
rod is pulled to move the clutch rod (7). Then, the
release fork (6) push es the release hub (8) and release
bearing (9) toward the flywheel. Simultaneously, the
release bearing (9) pushes the diaphragm spring (5).
As the pressure plate (4) is pulled by the diaphragm
spring (5), the frictional force among the flywheel (1),
clutch disc (2) and pressure plate (4) disappears.
Therefore, rotation of the flywheel (1) is not
transmitted to the clutch disc (2), and then the rotation of
the clutch shaft (10) stops.
(1) Flywheel
(2) Clutch Disc
(3) Clutch Cover
(4) Pressure Plate
(5) Diaphragm Spring
(6) Release Fork
(7) Clutch Rod
(8) Release Hub
(9) Release Bearing
(10) Clutch Shaft
W10129450
2-M1
TRACTOR, WSM
KiSC issued 06, 2006 A
2. DRY TYPE, DUAL STAGE CLUTCH
A dual stage clutch is a combination of two single
plate clutches. One clutch controls power transmitted to
travelling, and the other to the PTO.
■ Travelling Clutch “Engaged”
■ PTO Clutch “Engaged”
When the clutch p edal is not depressed, there is a
certain amount of clearance between the release bearing
(17) and the adjusting screw (16) mounted on the release
lever (15). Under the conditions above;
• The travelling clutch disc (10) is pressed between the
flywheel (1) and the pressur e plate 1 (2) by the forc e
of the belleville spring (11).
• The PTO clutch disc (12) is pressed between the
clutch cover 1 ( 4) an d th e pr ess ur e p late 2 ( 5 ) b y the
force of the belleville spring (14).
Thus, the rotation of flywhe el is transmitted to both
the travelling and PTO systems.
(1) Flywheel
(2) Pressure Plate 1 (Travelling)
(3) Adjusting Screw
(4) Clutch Cover 1
(5) Pressure Plate 2 (PTO)
(6) Clutch Cover 2
(7) Release Fork
(8) Clutch Lever
(9) Clutch Rod
■ Travelling Clutch “Disengaged”
■ PTO Clutch “Engaged”
When the clutch ped al is depressed t o the middle of
the stroke, the clutch rod (9) is pushed to move the clutch
lever (8). Then, the release for k (7) push es the releas e
hub (19) and release bearing (18) toward the flywhee l.
Simultaneously, the release bearing (18) pushes the
adjusting screw (17) attached to the release lever (16).
The release lever pulls the pressure plate 1 (2) by
means of the releas e rod (13) as the lever t urns at the
clevis pin (15) as a fulcrum.
When the pressure plate 1 is pulled, friction force
among the clutch cover 1 (4), cl utch disc (10) and the
pressure plate 1 (2) is lost. The rotation of flywheel is not
transmitted to travelling system.
At this time, the pressure plate 2 (5) is in contact with
the head of the adju sting screw (3) which serves as a
stopper.
(1) Flywheel
(2) Pressure Plate 1 (Travelling)
(3) Adjusting Screw
(4) Clutch Cover 1
(5) Pressure Plate 2 (PTO)
(6) Clutch Cover 2
(7) Release Fork
(8) Clutch Lever
(9) Clutch Rod
(10) Clutch Disc (Travelling)
CLUTCH
(10) Clutch Disc (Travelling)
(11) Belleville Spring
(12) Clutch Disc (PTO)
(13) Release Rod
(14) Belleville Spring
(15) Release Lever
(16) Adjusting Screw
(17) Release Bearing
(18) Release Hub
W10128590
(11) Belleville Spring
(12) Clutch Disc (PTO)
(13) Release Rod
(14) Belleville Spring
(15) Clevis Pin
(16) Release Lever
(17) Adjusting Screw
(18) Release Bearing
(19) Release Hub
W10133220
2-M2
TRACTOR, WSM
KiSC issued 06, 2006 A
CLUTCH
■ Travelling Clutch “Disengaged”
■ PTO Clutch “Disengaged”
When the clutch pedal is depressed to the full stroke,
the pressure plate 2 (5) is pushed to the right by the
adjusting screw (3).
This results in no friction among the flywheel (1),
clutch disc (12) and pressure plate 2 (5).
The rotation of flywheel is not transmitted to PTO
system and travelling system.
(1) Flywheel
(2) Pressure Plate 1 (Travelling)
(3) Adjusting Screw
(4) Clutch Cover 1
(5) Pressure Plate 2 (PTO)
(6) Clutch Cover 2
(7) Release Fork
(8) Clutch Lever
(9) Clutch Rod
(10) Clutch Disc (Travelling)
(11) Belleville Spring
(12) Clutch Disc (PTO)
(13) Release Rod
(14) Belleville Spring
(15) Release Lever
(16) Adjusting Screw
(17) Release Bearing
(18) Release Hub
W10139990
2-M3
TRACTOR, WSM
KiSC issued 06, 2006 A
3. HYDRAULIC MULTIPLE DISC CLUTCH
[1] TYPE 1 (For Travelling)
CLUTCH
(1) Input Shaft
(2) Idle Gear
(3) Clutch Pack (Reverse)
(4) Clutch Pack (Forward)
(5) Reverse Gear
(6) Reverse Gear Shaft
(7) Output Shaft
A : Forward
B : Reverse
When the clutch contr ol valve is a t “Neutral” position, the oi l from hydraulic pump does not flow t o clutch pac k.
Therefore the power from input shaft (1) is not transmitted to output shaft (7).
When the clutch control v alve is set at “Forward” position, the oil from hydra ulic pu mp fl ows to the f orward side
of the clutch pack (4). As a result, power is transmitted from input shaft (1) to output shaft (7) through clutch pack (4).
When the clutch control valve is set at “Reverse” position, the oil from hydraulic pump flows to the reverse side of
the clutch pack (3). As a result, power is transmitted from input shaft (1) to output shaft (7).
2-M4
TRACTOR, WSM
KiSC issued 06, 2006 A
[2] TYPE 2 (For PTO)
CLUTCH
When the clutch control valve is set at the
“ENGAGED” position, the oil from hydraulic pump flows
to clutch valve. Oil entering the clutc h pack pushes the
piston (2) to engage the clutch pack.
When the clutch control valve is set at the
“DISENGAGED” position, the oil from hydrau lic pump
stopped and the o il in th e c lu tc h p ack is drai ne d i nto the
transmission case. Thus the piston (2) is pushed back by
the return spring (7). When the piston (2) is pushed
back, the brake pl ate (8) is also moved to contact the
brake disc (9) so as to stop the rotati on and drag of the
PTO shaft.
(1) Plate
(2) Piston
(3) Brake Spring
(4) Clutch Hub
(5) Back Plate
(6) Clutch Disc
(7) Return Spring
(8) Brake Plate
(9) Brake Disc
a : From or To Clutch Control
Valve
(A) DISENGAGED
(B) ENGAGED
W10151580
2-M5
3 TRANSMISSION
KiSC issued 06, 2006 A
MECHANISM
KiSC issued 06, 2006 A
CONTENTS
1. TRANSMISSION GEARS .............................................................................3-M1
[1] SLIDING MESH TYPE........................................................................... 3-M1
[2] CONSTANT MESH TYPE......................................................................3-M2
[3] SYNCHRONOUS MESH TYPE.............................................................3-M3
2. HYDRAULIC SHUTTLE SHIFT....................................................................3-M4
[1] HYDRAULIC SHUTTLE SHIFT..............................................................3-M4
[2] HYDRAULIC SHUTTLE VALVE (TYPE 1)
(Code No. 3A691-23800, 3A051-23803) .................................................3-M5
(1) Operation...........................................................................................3-M6
[3] HYDRAULIC SHUTTLE VALVE (TYPE 2)
(Code No. YW119-0103)........................................................................3-M16
(1) Structure ..........................................................................................3-M16
(2) Operation.........................................................................................3-M18
3. SWING SHIFT.............................................................................................3-M28
4. DUAL SPEED ............................................................................................. 3-M31
[1] DUAL SPEED SECTION ..................................................................... 3-M32
[2] DUAL SPEED VALVE (Code No. YW217-00100) ..............................3-M33
5. HYDROSTATIC TRANSMISSION (TYPE 1) (Code No. 6C150-11603)..3-M34
[1] STRUCTURE......................................................................................... 3-M34
[2] OIL FLOW AND VALVES ...................................................................3-M36
[3] OPERATION..........................................................................................3-M40
[4] CONTROL LINKAGE............................................................................ 3-M43
6. HYDROSTATIC TRANSMISSION (TYPE 2) (Code No. TA240-58004)..3-M44
[1] STRUCTURE......................................................................................... 3-M44
[2] FUNCTION OF EACH COMPONENTS..............................................3-M46
[3] OIL FLOW.............................................................................................3-M49
[4] OPERATION..........................................................................................3-M50
[5] CONTROL LINKAGE............................................................................ 3-M56
7. HYDROSTATIC TRANSMISSION (TYPE 3) (Code No. 6C200-11604)..3-M57
[1] STRUCTURE......................................................................................... 3-M57
[2] PUMP AND MOTOR............................................................................ 3-M59
[3] OIL FLOW AND VALVES ...................................................................3-M60
[4] CONTROL LINKAGE............................................................................ 3-M68
[5] CRUISE CONTROL LINKAGE ............................................................3-M69
(1) Cruise Control..................................................................................3-M69
(2) Cruise Control Release....................................................................3-M70
8. HYDROSTATIC TRANSMISSION (TYPE 4)
(Code No. TD020-59992, TD060-59994).....................................................3-M71
[1] STRUCTURE......................................................................................... 3-M71
[2] OIL FLOW.............................................................................................3-M73
[3] FUNCTION OF COMPONENTS.......................................................... 3-M74
[4] OPERATION..........................................................................................3-M75
[5] CONTROL LINKAGE............................................................................ 3-M78
[6] CRUISE CONTROL.............................................................................. 3-M79
9. HYDROSTATIC TRANSMISSION (TYPE 5) (Code No. TC220-59990)..3-M81
KiSC issued 06, 2006 A
[1] STRUCTURE .........................................................................................3-M81
[2] OIL FLOW ................. ....... ...... ....... ...................................... ....... ...... .....3-M83
[3] OPERATION ..........................................................................................3-M84
[4] CONTROL LINKAGE ....................................... ...... ....... ...... ....... ...... .....3-M87
(1) HST Pedal Linkage .........................................................................3-M87
(2) Cruise Control ..................................................................................3-M88
10. GLIDE SHIFT TRANSMISSION (TYPE 1)
(GST Valve Code No. TA040-65015, TA040-99034).................................3-M89
[1] CHARACTERISTIC AND OUTLINE............................. ...... ....... ...... .....3-M89
[2] HYDRAULIC CIRCUIT..................................... .....................................3-M90
[3] STRUCTURE .........................................................................................3-M91
[4] CONSTRUCTION PARTS ....................................................................3-M92
(1) Regulator Valve................................................................................3-M92
(2) GST Valve Assembly .......................................................................3-M93
(3) Rotary Valve.....................................................................................3-M94
(4) Shift Pistons .....................................................................................3-M95
(5) Shift Check Valves ...........................................................................3-M96
(6) Low-pass Valve................................................................................3-M97
(7) Modulating Valve..............................................................................3-M98
(8) Modulating Check Valve...................................................................3-M99
(9) Accumulator ...................................................................................3-M100
(10)Clutch Valve...................................................................................3-M101
(11)Clutch Pack....................................................................................3-M102
11. GLIDE SHIFT TRANSMISSION (TYPE 2)
(GST Valve Code No. T1063-65004).........................................................3-M103
[1] CHARACTERISTIC AND SYSTEM OUTLINE..................................3-M103
[2] POWER TRAIN...................................................................................3-M104
[3] ELECTRICAL CONTROL SYSTEM...................................................3-M105
(1) Construc ti on and Functio n of Compon ents........................... ...... ...3- M10 5
(2) Electrical Control............................................................................3-M108
[4] HYDRAULIC CONTROL SYSTEM ....................................................3-M109
(1) Hydraulic Circuit and System Outline.............................................3-M109
(2) Construc ti on and Functio n of Compon ents........................... ...... ...3- M11 1
12. POWER SHIFT SYSTEM.........................................................................3-M118
[1] CONSTRUCTION AND FUNCTION OF COMPONENTS................3-M118
(1) Electric Components......................................................................3-M118
(2) Hydraulic Components...................................................................3-M122
[2] ELECTRIC CONTROL SYSTEM .......................................................3-M124
(1) Control System...............................................................................3-M124
(2) Power Shift Control ........................................................................3-M125
[3] AUTO SPEED CONTROL..................................................................3-M126
(1) Travel Mode ...................................................................................3-M126
(2) Field Mod e ...... ...... ....... ...... ....................................... ...... ....... ...... ...3-M128
MECHANISM
KiSC issued 06, 2006 A
[4] OTHER CONTROL.............................................................................3-M130
(1) Down-hill Control............................................................................ 3-M130
(2) Clutch Pedal Control......................................................................3-M130
(3) Shuttle Control ...............................................................................3-M130
(4) Auxiliary Control.............................................................................3-M131
[5] HYDRAULIC CONTROL SYSTEM.................................................... 3-M132
(1) Hydraulic Circuit.............................................................................3-M132
[6] POWER SHIFT VALVE......................................................................3-M133
13. DIFFERENTIAL GEAR SYSTEM.............................................................3-M136
[1] STRUCTURE....................................................................................... 3-M136
[2] OPERATION........................................................................................3-M136
[3] DIFFERENTIAL LOCK........................................................................ 3-M137
(1) Dog Clutch Type ............................................................................3-M137
(2) Pin Type......................................................................................... 3-M138
(3) Hydraulic Actuated Type................................................................3-M139
14. FINAL REDUCTION SYSTEM.................................................................3-M140
15. PTO SYSTEM...........................................................................................3-M141
[1] REAR AND MID PTO SYSTEM....................................................... 3-M141
[2] LIVE PTO AND GROUND PTO.......................................................3-M142
[3] INDEPENDENT PTO SYSTEM .........................................................3-M143
[4] REAR PTO SHAFT............................................................................3-M144
(1) Fixed PTO Shaft Type ...................................................................3-M144
(2) Interchangeable PTO Shaft Type ..................................................3-M145
[5] ONE-WAY CLUTCH SYSTEM...........................................................3-M146
TRACTOR, WSM
KiSC issued 06, 2006 A
1. TRANSMISSION GEARS
[1] SLIDING MESH TYPE
TRANSMISSION
In sliding mesh type, when the speed is selected, the
sliding gear is sl ide on the shaft and engaging gears to
enable the transmission of power.
(1) Shifter Gear 1
(2) Shifter Gear 2
(3) Shifter Gear 3
(4) Shifter Gear 4
W10126510
3-M1
TRACTOR, WSM
KiSC issued 06, 2006 A
[2] CONSTANT MESH TYPE
TRANSMISSION
In constant mesh type, each gear always engaged
with its opponent gear. When the speed is selected by
this type, shifter on the shaft slides to eng age the gear
and shaft. As a result, the transmission of power
becomes possible.
The constant mesh type have the advantage of much
less frequency in gear breakage compared to sliding
mesh type.
(1) Shifter 1
(2) Shifter 2
(3) Shifter 3
W10127640
3-M2
TRACTOR, WSM
KiSC issued 06, 2006 A
[3] SYNCHRONOUS MESH TYPE
TRANSMISSION
Synchronous mesh type transmits power by sliding
the shifter as well as constant mesh type.
However, the rotation of driving side parts and driven
side parts is sy nc hr on iz ed wit h s y nc hrono us me sh type,
and to facilitate changing the speed, synchronizer is
installed.
Therefore, it is poss ible to change the speed in this
type while the tractor even is moving.
(1) Hub
(2) Synchronizer Ring
(3) Shifter
(4) Synchronizer Key
(5) Outer Synchronizer Ring
(6) Center Ring
(7) Inner Synchronizer Ring
A : Type 1 (Single Cone Type)
B : Type 2 (Double Cone Type)
W10128140
3-M3
TRACTOR, WSM
■
KiSC issued 06, 2006 A
2. HYDRAULIC SHUTTLE SHIFT
[1] HYDRAULIC SHUTTLE SHIFT
The hydraulic shuttle shift allows the operators to
change forward and reverse with a shuttle lever.
When the shuttle lever is move to the “Forward” or
“Reverse” position, each side of th e hydraulic c lutch is
engaged. The power is transmitted as follows
■ Forward
Input Shaft (1) → Shuttle Clutc h Body (4) → Clutch
Disc and Plate (8) → 28T Gear (5) → 1st Shaft (6)
■ Reverse
Input Shaft (1) → Shuttle Clutc h Body (4) → Clutch
Disc and Plate (3) → 26T Gear (2) → 25T Idle Gear (11)
→ 23T Gear (10) → Shaft 1 (9) → 25T Gear (7) → 28T
Gear (5) → 1st Shaft (6)
NOTE
• When the clutch pedal is depressed, neither
“Forward” side or “Reverse” side is engaged and
the power is not transmitted.
(1) Input Shaft
(2) 26T Gear
(3) Clutch Disc and Plate
(4) Shuttle Clutch Body
(5) 28T Gear
(6) 1st Shaft
TRANSMISSION
(7) 25T Gear
(8) Clutch Disc and Plate
(9) Shaft 1
(10) 23T Gear
(11) 25T Idle Gear
(12) Idle Shaft
W1012816
3-M4
TRACTOR, WSM
KiSC issued 06, 2006 A
TRANSMISSION
[2] HYDRAULIC SHUTTLE VALVE (TYPE 1) (Code No. 3A691-23800, 3A051-
23803)
(1) Power Steering Controller
(2) Modulating Valve
(3) Shuttle Shift Spool
(4) Proportionally Reducing Valve
(Forward, Reverse)
(5) Accumulate Valve
(6) Shuttle Valve
(7) PTO Control Valve
(8) Oil Cooler
(9) Oil Cooler Relief Valve
P : From Power Steering
Controller
A : Pressure Check Port
(Modulation)
B : Pressure Check Port
(Forward)
F : To Clutch Body (Forward)
R : To Clutch Body (Reverse)
C : Pressure Check Port
(Reverse)
1, T2 : Tank Port
T
Hydraulic shuttle valve is composed of modulating
valve (2), proportio nally reducing valve (4) , shuttle shift
spool (3), accumulate valve (5) and other component
parts.
3-M5
W1023055
TRACTOR, WSM
KiSC issued 06, 2006 A
(1) Operation
■ Shuttle Lever at Neutral Position
TRANSMISSION
3-M6
TRACTOR, WSM
KiSC issued 06, 2006 A
TRANSMISSION
(1) Modulating Valve
(2) Proportionally Reducing Valve
(3) Spool (Forward, Reverse)
(4) Accumulate Valve
(5) Shuttle Valve Case 1
(6) Shuttle Valve Case 2
(7) Shuttle Lever
(8) Clutch Pedal
A : Check Port (Modulation)
B : Check Port (Forward)
C : Check Port (Reverse)
P : From Pump
F : To Clutch Body (Forward)
R : To Clutch Body (Reverse)
1 : To Transmission Case
T
2 : To Transmission Case
T
a : Connect to Shuttle Lever
b : Connect to Clutch Pedal
When the sh ut t le l ev e r a t Neutral position, as the oil passage between P port to F or R port is closed by spool (3),
pressure- fed oil from P port flows to the T
2 port. Thus the shuttle clutch is not engage.
3-M7
TRACTOR, WSM
KiSC issued 06, 2006 A
TRANSMISSION
■ When Shuttle Lever is Shifting Neutral to Forward or Reverse Position (Clutch Pedal is Released)
a : Connect to Shuttle Lever b : Connect to Clutch Pedal
3-M8
TRACTOR, WSM
KiSC issued 06, 2006 A
TRANSMISSION
(1) Modulating Valve
(2) Proportionally Reducing Valve
(3) Spool (Forward, Reverse)
(4) Accumulate Valve
(5) Shuttle Valve Case 1
(6) Shuttle Valve Case 2
(7) Shuttle Lever
(8) Clutch Pedal
A : Check Port (Modulation)
B : Check Port (Forward)
C : Check Port (Reverse)
P : From Pump
F : To Clutch Body (Forward)
R : To Clutch Body (Reverse)
1 : To Transmission Case
T
2 : To Transmission Case
T
When the shuttle lever is moved to “FORWARD” or “REVERSE”, pressure-fed oil from P port flows into shuttle
clutch via F or R port. At this time, the pressure of F or R port is increased gradually by modulating valve (1).
When the shuttl e clutch is engaging, the accumulate valve ( 4) assists the operatio n of modulating valve (1) to
reduce a shock.
3-M9
TRACTOR, WSM
KiSC issued 06, 2006 A
■ Shuttle Lever at Forward Position (Clutch Pedal is Released)
TRANSMISSION
a : Connect to Shuttle Lever b : Connect to Clutch Pedal
3-M10
TRACTOR, WSM
KiSC issued 06, 2006 A
TRANSMISSION
(1) Modulating Valve
(2) Proportionally Reducing Valve
(3) Spool (Forward, Reverse)
(4) Accumulate Valve
(5) Shuttle Valve Case 1
(6) Shuttle Valve Case 2
(7) Shuttle Lever
(8) Clutch Pedal
A : Check Port (Modulation)
B : Check Port (Forward)
C : Check Port (Reverse)
P : From Pump
F : To Clutch Body (Forward)
R : To Clutch Body (Reverse)
1 : To Transmission Case
T
2 : To Transmission Case
T
When the shuttle lever hav e been setting on the F side, the oil pressure on F port i s constantly controlled by
proportionally reducing valve (2).
On the other hand, the oil in the R side of shuttle clutch returns to T
1 port through R port and spool (3).
3-M11
TRACTOR, WSM
KiSC issued 06, 2006 A
■ Shuttle Lever at Reverse Position (Clutch Pedal is Released)
TRANSMISSION
a : Connect to Shuttle Lever b : Connect to Clutch Pedal
3-M12
TRACTOR, WSM
KiSC issued 06, 2006 A
TRANSMISSION
(1) Modulating Valve
(2) Proportionally Reducing Valve
(3) Spool (Forward, Reverse)
(4) Accumulate Valve
(5) Shuttle Valve Case 1
(6) Shuttle Valve Case 2
(7) Shuttle Lever
(8) Clutch Pedal
A : Check Port (Modulation)
B : Check Port (Forward)
C : Check Port (Reverse)
P : From Pump
F : To Clutch Body (Forward)
R : To Clutch Body (Reverse)
1 : To Transmission Case
T
2 : To Transmission Case
T
When the shuttle lever have been setting on the R side, the oil pressure on R port is constantly controlled by
proportionally reducing valve (2).
On the other hand, the oil in the F side of shuttle clutch returns to T
1 port through F port and spool (3).
3-M13
TRACTOR, WSM
KiSC issued 06, 2006 A
■ When Clutch Pedal is Depressed (with Shuttle Lever at Forward or Reverse Position)
TRANSMISSION
a : Connect to Shuttle Lever b : Connect to Clutch Pedal
3-M14
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