SANY LATIN AMERICA
4-44
SY195/205/215/225C9 Crawler Hydraulic Excavator
Structure and Function
Shop Manual - June 2013
XAtr : R. travel (reverse) pilot port
XBtr : R. travel (forward) pilot port
(XAo): (Option pilot port)
(XBo): (Option pilot port)
XAk: Bucket (DIG) pilot port
XBk: Bucket (DUMP) pilot port
XAb1: Boom 1 (UP) pilot port
XBb1: Boom 2 (DOWN) pilot port
XAa2: Arm 2 (OUT) pilot port
XBa2: Arm 2 (IN) pilot port
XAtL: L. travel (reverse) pilot port
XBtL: L. travel (forward) pilot port
XAs: Swing (left) pilot port
XBs: Swing (right) pilot port
XAa1: Arm 1 (OUT) pilot port
XBa: Arm 1 (IN) pilot port
Dr1: Drain port
Px: Work equipment signal port
Py: Travel signal port
Pz: Main relief valve boosting pressure
PG: Pilot pressure resource port
Pns: Swing logic control valve pilot port
PCK: Bucket (DIG) stroke limit pilot port
PnA2: Arm 2 logic control valve pilot port
Dr2: Drain port
Dr3: Drain port
Dr6: Drain port
Dr7: Drain port
Pal: Lock valve pilot port (arm rod end)
PbL: Lock valve pilot port (boom head end)
(XBp1):Bypass cut spool pilot port (P1 side)
XBp2: Bypass cut spool pilot port (P2 side)
XAb2: Boom con
fl
uence (UP) pilot pressure
Psp: Swing priority pilot port
R1: Return port
R2: Oil feed port
Atr: R. travel motor port (reverse)
Btr: R. travel motor port (forward)
(Ao): Option
(Bo): Option
Ak: Bucket cylinder head end port (DIG)
Bk: Bucket cylinder rod end port (DUMP)
Ab: Boom cylinder head end port (UP)
Bb: Boom cylinder rod end port (DOWN)
AtL: L. travel motor port (reverse)
BtL: L. travel motor port (forward)
As: Swing motor port (left swing)
Bs: Swing motor port (right swing)
Aa: Arm cylinder rod end port (OUT)
Ba: Arm cylinder head end port (IN)
P1: Pump port (P1 side)
P2: Pump port (P2 side)
MR: Main relief valve
AR: Arm regeneration check valve
AbR: Port relief valve
BbR: Port relief valve
AkR: Port relief valve
BkR: Port relief valve
AoR: Port relief valve
BoR: Port relief valve
AaR: Port relief valve
BaR: Port relief valve
NOTE: For more technical information about the control valve, see “Control valve” on page 3-6.
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