SANY LATIN AMERICA
4-60
SY195/205/215/225C9 Crawler Hydraulic Excavator
Structure and Function
Shop Manual - June 2013
[Pilot circuit]
●
Pilot pressure oil is supplied to port Psp
and swing priority spool (311) is switch.
[Main circuit]
●
Switch swing priority spool (311). The
opening area of the swing priority reduces.
As a result, working oil from arm 1 spool
(302) flows into swing spool (305) and
swing operation takes precedence.
(2) Swing priority function
Psp
ZX225-1102021
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