Control Linkage; Rops Model; Cabin Model - Kubota WSM B2050 Workshop Manual

B2050, B2350, B2650, B3150, WSM
(Continued)
When the speed control pedal (HST pedal) is stepped on and set to "Reverse", the variable swashplate is tilted
as shown in figure above.
As the pump cylinder block rotates with the input shaft, oil is forced out of pump port B at high pressure. As
pressure oil from the pump cylinder block enters to motor port D, the pistons, which align with port D, are pushed
against the swashplate and slide down the inclined surface.
Then the output shaft rotates with the motor cylinder block. This drives the machine reward and the angle of pump
swashplate determines the output speed.
As the motor cylinder block continues to rotate, oil is forced out of motor port C at low pressure and retunes to the
pump port A.

[4] CONTROL LINKAGE

(1) ROPS Model

(2) CABIN Model

The HST pedal (5) and the trunnion shaft (4) of the
variable swashplate are linked with the speed control rod
(7) and the neutral holder (3). As the front footrest of the
HST pedal (5) is depressed, the swashplate rotates and
forward travelling speed increases. Depressing the rear
footrest increases reverse travelling speed.
The roller (2) on the neutral holder arm (1) is held
with spring seats and the detent of the neutral holder (3)
so that the neutral holder (3) returns to neutral. When the
pedal is released, the swashplate is returned to neutral
with the neutral holder (3). The damper (8) connected to
the HST pedal (5) restricts the movement of the linkage
to prevent abrupt operation or reversing.
(1) Neutral Arm
(2) Roller
(3) Neutral Holder
(4) Trunnion Shaft
The HST pedal (5) and the trunnion shaft (4) of the
variable swashplate are linked with the speed control rod
(7) and the neutral holder (3). As the front footrest of the
HST pedal (5) is depressed, the swashplate rotates and
forward travelling speed increases. Depressing the rear
footrest increases reverse travelling speed.
The roller (2) on the neutral holder arm (1) is held
with spring seats and the detent of the neutral holder (3)
so that the neutral holder (3) returns to neutral. When the
pedal is released, the swashplate is returned to neutral
with the neutral holder (3). The damper (8) connected to
the HST pedal (5) restricts the movement of the linkage
to prevent abrupt operation or reversing.
(1) Neutral Arm
(2) Roller
(3) Neutral Holder
(4) Trunnion Shaft
3-M23
TRANSMISSION
9Y1210982TRM0022US0
(5) HST Pedal
(6) Spring
(7) Speed Control Rod (HST)
(8) Damper
9Y1210982TRM0023US0
(5) HST Pedal
(6) Spring
(7) Speed Control Rod (HST)
(8) Damper
9Y1210982TRM0046US0
KiSC issued 03, 2014 A