Throttle-up Switch; Stall Guard on and the PTO is engaged- Page 313

Kubota L3560 Owners Manual

2014 Dodge Charger SRT Owner Manual

Table of Contents

L3560,L4060,L4760,L5060,L5460,L6060
9 ELECTRICAL SYSTEM
background image

TRANSMISSION

L3560, L4060, L4760, L5060, L5460, L6060, WSM

3-M37

(Continued)

1. The swashplate on the motor side is changed to the Lo side (The lamp of the turtle lights up and the rabbit lamp

goes off).

2. At the same time, the swashplate on the pump side is inclined toward the speed increasing side (To achieve

smooth shift transmission).

3. Even when the position of the swashplate on the motor side is changed toward the Lo side but a balance between

the load and engine torque cannot be achieved, the ECU controls the proportional control valve so that the engine

torque and loads on the HST are balanced, activates the servo piston and moves the swashplate on the pump

side to the neutral side. As a result, the loads applied on the pump are decreased more and reduces the load on

the engine. This increases the engine speed and prevents an engine stall.

* When the pedal is kept at the same position, the load is decreased and engine speed is increased again. In this

state, signals are being continuously transmitted from the engine speed sensor to the ECU. Then the signals are sent

from the ECU to the proportional control valve and the Hi-Lo solenoid valve. (4) As a result, the swashplate on the

pump side returns to its original position (before speed reduction). (5) The position of the swashplate on the motor

side is also automatically changed toward the Hi side. (The pump and motor move in almost the same manner as

shown in the illustration 4.)

* When the Hi-Lo lever is manually set at 

"Lo"

 position, the setting is not automatically changed to the Hi side

even if the AUTO H-DS function is set to 

"ON"

.

9Y1210824TRM0039US0

[I] Stage 

9

Stall Guard on and the PTO is engaged

[Tractor Condition]

Stall-Guard: 

ON

Hydro Dual Speed: 

ON

PTO Switch: 

ON

1. By the load of the PTO, the engine revolution number goes down.

2. When the engine revolution goes down, the ECU will send the message to return the Pump Swashplate to the

neutral position.

3. At the Stall Guard PLUS, compared with at the Stall Guard, the Pump Swashplate is set in such a way as to

quickly return to the neutral position.

4. On the other hand, when the engine revolution recovers, the Pump Swashplate is set in such a way as to slowly

return.

5. The setting is in such a way as the PTO work can be done at the engine revolution of 2000 or higher even when

the PTO load is applied at the maximum engine revolution. (At the time of depressing the pedal.)

6. Because the stable engine revolution has priority, the response-dial is not operable for adjustment.

9Y1210824TRM0040US0

[J] Stage 10

Throttle-up Switch

[Tractor Condition]

HST Pedal : 

Forward

 Position

Throttle-Up Switch : 

"OFF"

 → 

"ON"

 → 

"OFF"

The throttle-up function works while the throttle-up switch is pushed. While holding down the throttle-up switch,

the engine revolution increases to the preset revolution. Based on a signal from the throttle-up switch, the main ECU

provides an arbitrarily preset engine revolution to the engine ECU. Signals are sent continuously from each sensor

to  the  ECU  all  the  time.  Simultaneously,  in  order  to  prevent  sudden  increase  in  traveling  speed  as  the  engine

revolution rises, the main ECU controls the proportional control valve so that the increase of engine revolution and

swashplate on the HST keeps well-balanced relation. Because the proportional control valve controls the oil supplied

from the regulator, the servo piston moved toward the neutral direction. As a result, the swashplate on the pump side

moves  toward  the  neutral  direction.  The  signal  from  the  throttle-up  switch  stops  when  the  throttle-up  switch  is

released.

This enables return of the engine speed to the speed set by the hand throttle lever.

* When the pedal is kept at the same position, the signals are sent from the main ECU to the proportional control

valve. Thereby, more oil is supplied from the regulator to the servo piston. As a result, the swashplate on the pump

side returns to its original position.

9Y1210824TRM0041US0

KiSC issued 03, 2016 A

Detailed Information for Kubota L3560 Owners Manual

Lists of information found in Kubota L3560 Owners Manual - Page 313

  • 1. The swashplate on the motor side is changed to the Lo side (The lamp of the turtle lights up and the rabbit lamp goes off).
  • 2. At the same time, the swashplate on the pump side is inclined toward the speed increasing side (To achieve smooth shift transmission).
  • 3. Even when the position of the swashplate on the motor side is changed toward the Lo side but a balance between the load and engine torque cannot be achieved, the ECU controls the proportional control valve so that the engine torque and loads on the HST are balanced, activates the servo piston and moves the swashplate on the pump side to the neutral side.
  • 4.) * When the Hi-Lo lever is manually set at "Lo" position, the setting is not automatically changed to the Hi side even if the AUTO H-DS function is set to "ON" .
  • 1. By the load of the PTO, the engine revolution number goes down.
  • 2. When the engine revolution goes down, the ECU will send the message to return the Pump Swashplate to the neutral position.
  • 3. At the Stall Guard PLUS, compared with at the Stall Guard, the Pump Swashplate is set in such a way as to quickly return to the neutral position.
  • 4. On the other hand, when the engine revolution recovers, the Pump Swashplate is set in such a way as to slowly return.
  • 5. The setting is in such a way as the PTO work can be done at the engine revolution of 2000 or higher even when the PTO load is applied at the maximum engine revolution.
  • 6. Because the stable engine revolution has priority, the response-dial is not operable for adjustment.

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