{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Ch. 8 - CHAPTER 8 Temperature and Contamination Control...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
1 CHAPTER 8 Temperature and Contamination Control Fluid Power Circuits and Controls, John S.Cundiff, 2001 INTRODUCTION z Four functions of Hydraulic fluid are z To transmit power z To lubricate z To seal clearances z To provide cooling
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
2 INTRODUCTION z Hydraulic oil is a lubricant, which transmits power through pressure and flow, but also provides vital cooling and lubrication to moving parts. z For optimum hydraulic component life, the oil viscosity should be maintained in an acceptable range and the contamination level should be minimized. TEMPERATURE CONTROL z Operating temperatures consistently above 160 o F promote chemical reactions that change the properties of the oil. z The effects of high temperature are : z Oxidation of the oil. z Formation of insoluble gums, varnishes and acids. z Deterioration of seals (they harden and leakage begins) z Loss of lubricity z Changes in viscosity
Background image of page 2