STRUCTURE, FUNCTION AND MAINTENANCE STANDARD CONTROL VALVE
PC58UU-3 10-29
CONTROL VALVE
OUTLINE
★ The outside view of the valve body shows the
standard valve.
★ Each service valve is of the add-on type and
can be added and removed.
★ Add-on the service valve between the 8th
swing valve and cover.
C : To oil cooler PP : To main pump
S : To swing motor A PS : To swing motor B
T : To tank TS : To tank
A1: To L.H. travel motor A PA1 : From L.H. travel FORWARD PPC valve
A2: To R.H. travel motor A PA2 : From right travel FORWARD PPC valve
A3: To boom cylinder head PA3 : From boom LOWER PPC valve
A4: To arm cylinder head PA4 : From arm OUT PPC valve
A5: To bucket cylinder head PA5 : From bucket DUMP PPC valve
A6: To offset cylinder head PA6 : From R.H. offset PPC valve
A7: To blade cylinder head PA8 : From swing to left PPC valve
A8: To swing motor MB PB1 : From L.H. travel REVERSE PPC valve
B1: To L.H. travel motor PB2 : From R.H. travel REVERSE PPC valve
B2: To R.H. travel motor PB3 : From boom RAISE PPC valve
B3: To boom cylinder bottom PB4 : From arm IN PPC valve
B4: To arm cylinder bottom PB5 : From bucket CURL PPC valve
B5: To bucket cylinder bottom PB6 : From left offset PPC/EPC valve
B6: To offset cylinder bottom PB8 : From swing to right PPC valve
B7: To blade cylinder bottom PP1 : P1 pump pressure
B8: To swing motor MB PP2 : P2 pump pressure
LS: To pump LS valve PP3 : Work equipment side pump pressure
P1: From main pump (variable pump) PLS1: L.H. travel LS pressure
P2: From main pump (variable pump) PLS2: R.H. travel LS pressure
P3: From main pump (gear pump) PLS3: Work equipment LS pressure
PI: From boom RAISE PPC valve
(5)
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