SECTION 10
RECIRCULATION SYSTEM
Page 10-1
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10 Recirculation System
The recirculation system keeps the hydraulic oil at operating temperature while
using the minimum amount of cooling water flow. The system also provides the
necessary oil conditioning and filtration to maintain oil cleanliness. The
conditioning of the hydraulic oil includes cooling it, cleaning it, and together
with the hydraulic tank, removing air bubbles entrained in the oil due to
agitation and turbulent flow in the main pump circuit.
10.1 Components
The cooling and filtration system (recirculation system)
is equipped with the
following:
• Recirculation pump (gear-type)–which receives oil from the oil tank
• Heat exchanger - cooling water is controlled by the water modulating valve
• Oil filter assembly - includes an indicator to show the filter element
condition. It also includes a bypass or relief valve, should the filter element
become entirely clogged with dirt/contaminants.
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