JPS5573790A - Method of preventing strange noise from cylinder in hydraulic machine - Google Patents

Method of preventing strange noise from cylinder in hydraulic machine

Info

Publication number
JPS5573790A
JPS5573790A JP14768278A JP14768278A JPS5573790A JP S5573790 A JPS5573790 A JP S5573790A JP 14768278 A JP14768278 A JP 14768278A JP 14768278 A JP14768278 A JP 14768278A JP S5573790 A JPS5573790 A JP S5573790A
Authority
JP
Japan
Prior art keywords
cylinder
sulfonate
alkaline earth
hydraulic machine
strange noise
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
JP14768278A
Other languages
Japanese (ja)
Inventor
Susumu Oohazama
Masatada Yamashita
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.)
Eneos Corp
Original Assignee
Nippon Oil 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 Nippon Oil Corp filed Critical Nippon Oil Corp
Priority to JP14768278A priority Critical patent/JPS5573790A/en
Publication of JPS5573790A publication Critical patent/JPS5573790A/en
Pending legal-status Critical Current

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  • Lubricants (AREA)

Abstract

PURPOSE: A specified amount of alkaline earth sulfonate is added to the base oil of lubricant to prevent strange noise of cylinder without any adverse effect on the characteristics as the hydraulic oil.
CONSTITUTION: An alkaline earth sulfonate is added to the base oil of lubricant in an amount of 0.01W2, preferably 0.02W0.05wt%. The sulfonate is, e.g., that of Ca, Mg or Ba, especially the Mg salt is preferred. The sulfonate salt is obtained by the sulfonation of an alkylated aromatic hydrocarbon with fuming sulfuric acid, followed by substitution with one of these alkaline earth metals.
COPYRIGHT: (C)1980,JPO&Japio
JP14768278A 1978-11-29 1978-11-29 Method of preventing strange noise from cylinder in hydraulic machine Pending JPS5573790A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14768278A JPS5573790A (en) 1978-11-29 1978-11-29 Method of preventing strange noise from cylinder in hydraulic machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14768278A JPS5573790A (en) 1978-11-29 1978-11-29 Method of preventing strange noise from cylinder in hydraulic machine

Publications (1)

Publication Number Publication Date
JPS5573790A true JPS5573790A (en) 1980-06-03

Family

ID=15435891

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14768278A Pending JPS5573790A (en) 1978-11-29 1978-11-29 Method of preventing strange noise from cylinder in hydraulic machine

Country Status (1)

Country Link
JP (1) JPS5573790A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02286793A (en) * 1989-04-28 1990-11-26 Tonen Corp Hydraulic oil composition

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02286793A (en) * 1989-04-28 1990-11-26 Tonen Corp Hydraulic oil composition

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