JPS641661A - Hydraulic circuit for working vehicle - Google Patents

Hydraulic circuit for working vehicle

Info

Publication number
JPS641661A
JPS641661A JP62156884A JP15688487A JPS641661A JP S641661 A JPS641661 A JP S641661A JP 62156884 A JP62156884 A JP 62156884A JP 15688487 A JP15688487 A JP 15688487A JP S641661 A JPS641661 A JP S641661A
Authority
JP
Japan
Prior art keywords
oil
valve
pressure
line
speed change
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP62156884A
Other languages
Japanese (ja)
Other versions
JPH011661A (en
Inventor
Masaru Machida
Shigekazu Hasegawa
Yoshimi Ota
Akio Hattori
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kubota Corp
Kubota Seiki Co Ltd
Original Assignee
Kubota Corp
Kubota Seiki Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kubota Corp, Kubota Seiki Co Ltd filed Critical Kubota Corp
Priority to JP62156884A priority Critical patent/JPS641661A/en
Publication of JPH011661A publication Critical patent/JPH011661A/en
Publication of JPS641661A publication Critical patent/JPS641661A/en
Pending legal-status Critical Current

Links

Landscapes

  • Power Steering Mechanism (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)

Abstract

PURPOSE: To prevent output drop of a power steering by suppressing oil pressure charge to the speed change hydraulic system when the power steering system is actuated in the condition that pressure oil is supplied to the speed change hydraulic system.
CONSTITUTION: A pump 24 is connected with No.1 oil line a for supply of oil presssure to the speed change hydraulic system and No.2 oil line b for supply of pressure oil to the PS system in such a way as parallelly No.1 flow line selector valve 31, No.2 oil path selector valve 32, check valve 33, and decompression valve 34 are connected in series in this No.1 oil line a. Downstream of the decompression valve 34 a control valve 22 is connected through a pressure adjusting valve 23. When the PS system is in service, the steering load raises the circuit pressure of No.2 oil line b, and on the basis thereof an opening/ closing valve incorporated in the pilot circuit of No.1 flow line selector valve 31 is closed, and switching of the charge condition into No.1 oil line a is hindered to prevent the PS system output from dropping.
COPYRIGHT: (C)1989,JPO&Japio
JP62156884A 1987-06-24 1987-06-24 Hydraulic circuit for working vehicle Pending JPS641661A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62156884A JPS641661A (en) 1987-06-24 1987-06-24 Hydraulic circuit for working vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62156884A JPS641661A (en) 1987-06-24 1987-06-24 Hydraulic circuit for working vehicle

Publications (2)

Publication Number Publication Date
JPH011661A JPH011661A (en) 1989-01-06
JPS641661A true JPS641661A (en) 1989-01-06

Family

ID=15637497

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62156884A Pending JPS641661A (en) 1987-06-24 1987-06-24 Hydraulic circuit for working vehicle

Country Status (1)

Country Link
JP (1) JPS641661A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0374922U (en) * 1989-11-27 1991-07-26

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0374922U (en) * 1989-11-27 1991-07-26

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