JPS6410828A - Fluid pressure circuit of working vehicle - Google Patents

Fluid pressure circuit of working vehicle

Info

Publication number
JPS6410828A
JPS6410828A JP16739687A JP16739687A JPS6410828A JP S6410828 A JPS6410828 A JP S6410828A JP 16739687 A JP16739687 A JP 16739687A JP 16739687 A JP16739687 A JP 16739687A JP S6410828 A JPS6410828 A JP S6410828A
Authority
JP
Japan
Prior art keywords
pressure
valve
relief
fluid pressure
center bypass
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.)
Granted
Application number
JP16739687A
Other languages
Japanese (ja)
Other versions
JPH0663266B2 (en
Inventor
Kazuyoshi Arii
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
Original Assignee
Kubota Corp
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 filed Critical Kubota Corp
Priority to JP16739687A priority Critical patent/JPH0663266B2/en
Publication of JPS6410828A publication Critical patent/JPS6410828A/en
Publication of JPH0663266B2 publication Critical patent/JPH0663266B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Operation Control Of Excavators (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

PURPOSE:To prevent damage to the operating system by lowering the fluid pressure of the operating system without lowering of the drive speed of the traveling system by a method in which a center bypass is closed and the fluid pressure rises, the set relief pressure of a relief valve is reduced. CONSTITUTION:A relief pressure automatic altering device A by which the set relief pressure of a relief valve 11 is reduced only when the fluid pressure rises with the rise of fluid pressure between an operation valve V1 for traveling and an operation valve V2 for operation in a center bypass 11 is provided. In connection with the rise of pressure of fluid in the upstream path 11a of the operation valve V2 of the center bypass 11 due to the close of the center bypass 11 when operating the valve V2 for the boom during operation, the set pressure of the relief valve 14 is more reduced than traveling period by the automatic relief pressure altering device A.
JP16739687A 1987-07-03 1987-07-03 Hydraulic circuit of work vehicle Expired - Lifetime JPH0663266B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16739687A JPH0663266B2 (en) 1987-07-03 1987-07-03 Hydraulic circuit of work vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16739687A JPH0663266B2 (en) 1987-07-03 1987-07-03 Hydraulic circuit of work vehicle

Publications (2)

Publication Number Publication Date
JPS6410828A true JPS6410828A (en) 1989-01-13
JPH0663266B2 JPH0663266B2 (en) 1994-08-22

Family

ID=15848923

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16739687A Expired - Lifetime JPH0663266B2 (en) 1987-07-03 1987-07-03 Hydraulic circuit of work vehicle

Country Status (1)

Country Link
JP (1) JPH0663266B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160119486A (en) * 2015-04-06 2016-10-14 두산인프라코어 주식회사 Hydraulic brake system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160119486A (en) * 2015-04-06 2016-10-14 두산인프라코어 주식회사 Hydraulic brake system

Also Published As

Publication number Publication date
JPH0663266B2 (en) 1994-08-22

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