Control Valve - Komatsu PC600LC-7 Manual

STRUCTURE, FUNCTION AND MAINTENANCE STANDARD

CONTROL VALVE

Outline
• This control valve consists of a 4-spool valve and
a 5-spool valve, and a travel shuttle valve is also
installed to it. Furthermore, a straight-travel
valve, arm throttle valve, and swing priority valve
are built in.
• The 4-spool and 5-spool valves are connected
by bolts to form one unit, and internal merging of
the oil flow makes it even more compact and
easy to maintain.
A1L : To L.H. travel motor PB port
A2L : To boom cylinder bottom
A3L : To bucket cylinder head
A1R : To swing motor MA port
A3R : Service
A4R : To arm cylinder head
A5R : To R.H. travel motor PA port
B1L : To L.H. travel motor PA port
B2L : To boom cylinder head
B3L : To bucket cylinder bottom
B1R : To swing motor MB port
B3R : Service
B4R : To arm cylinder bottom
B5R : To R.H. travel motor PB port
NCAL : To rear NC valve
NCBL : To rear NC valve
NCAR : To front NC valve
NCBR : To front NC valve
P3 : From arm PPC shuttle valve
P4 : From boom, bucket PPC shuttle valve
P5 : From swing PPC shuttle valve
P6 : Work equipment oil pressure switch
1. Travel shuttle valve
2. 4-spool valve
(straight-travel valve, arm throttle valve built in)
3. 5-spool valve (swing priority valve built in)
10-64
P1AL : From L.H. travel PPC valve
P2AL : From boom PPC valve
P3AL : From bucket PPC valve
P4AL : From arm PPC valve
P1AR : From swing PPC valve
P3AR : Service
P4AR : From arm PPC valve
P5AR : From R.H. travel PPC valve
P1BL : From L.H. travel PPC valve
P2BL : From boom PPC valve
P3BL : From bucket PPC valve
P1BR : From swing PPC valve
P3BR : Service
P4BR : From arm PPC valve
P5BR : From R.H. travel PPC valve
PL : From rear main pump
PR : From front main pump
PRL : From 2-stage relief solenoid valve
PRR : From 2-stage relief solenoid valve
T : To tank
TS : To tank
CONTROL VALVE
PC600, 600LC-7