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402 Hydraulic system, Part 2
Control valve
A1:
To bucket cylinder head
A2:
To L.H. travel motor
A3:
To boom cylinder bottom
A4:
To swing motor
A5:
To R.H. travel motor
A6:
To arm cylinder head
A-1:
To attachment
ATT:
From attachment
B1:
To bucket cylinder bottom
B2:
To L.H. travel motor
B3:
To boom cylinder head
B4:
To swing motor
B5:
To R.H. travel motor
B6:
To arm cylinder bottom
B-1:
To attachment
BP1: From LS select solenoid valve
BP5: From attachment selector solenoid valve
C:
To oil cooler
P1:
From R.H. work equipment PPC valve
(bucket DUMP)
P2:
From R.H. work equipment PPC valve
(bucket CURL)
P3:
From travel PPC valve (L.H. travel
REVERSE)
P4:
From travel PPC valve (L.H. travel FOR-
WARD)
P5:
From R.H. work equipment PPC valve
(boom RAISE)
P6:
From R.H. work equipment PPC valve
(boom LOWER)
P7:
From L.H. work equipment PPC valve
(swing RIGHT)
P8:
From L.H. work equipment PPC valve
(swing LEFT)
P9:
From travel PPC valve (R.H. travel
REVERSE)
P10:
From travel PPC valve (R.H. travel FOR-
WARD)
P11:
From L.H. work equipment PPC valve (arm
OUT)
P12:
From L.H. work equipment PPC valve (arm
IN)
P-1:
From R.H. attachment PPC valve
P-2:
From R.H. attachment PPC valve
PLS1: To rear pump LS valve
PLS2: To front pump LS valve
PLSC: LS pressure pickup port
PP1: From rear pump
PP2: From front pump
PP1S: Front pump oil pressure sensor mounting
port
PPC: Pilot source pressure pickup port
PP2S: Rear pump oil pressure sensor mounting
port
PPS2: To front pump LS valve
PR:
To solenoid valve, PPC valve, and EPC
valve
PST: From travel junction solenoid valve
PC200, 200LC, 220, 220LC-8M0
PX1: From 2-stage relief solenoid valve
PX2: From 2-stage relief solenoid valve
T:
To hydraulic tank
T1:
To hydraulic tank
TS:
To hydraulic tank
TSW: From swing motor
IS1:
Pump merge-divider EPC valve (for main
spool) drive signal
IS2:
Pump merge-divider EPC valve (for LS
spool) drive signal
IS3:
Variable back pressure solenoid valve drive
signal
1.
Variable back pressure valve
2.
Variable back pressure solenoid valve
3.
Pump merge-divider EPC valve (for LS spool)
4.
Pump merge-divider EPC valve (for main
spool)
5.
Arm check valve
6.
Boom hydraulic drift prevention valve
7.
Service valve
8.
Cover A
9.
7-spool valve
10. Arm quick return valve
11. Cover B
12. Merge-divider valve
SEN06120-00
3
10-402
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