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3-35
Pc42
Pb3
Pd41
B2
A2
Pb1
A1
B1
Pa1
T1
V3
Pd2
Pc2
D2
C2
Pc1
D1
C1
P0
DR0
Pd1
Ai
B4
B5
A5
Pa5
Pb5
Pa4
Pb4
C5
D5
D4
C4
Pc41
Rs
C6
D6
DR4
P03
Patt
P02
Pn2
Pn1
Po5
Puo
P04
DR2
Pc3
Pa21
Pb21
Pb20
Pa20
DR1
DR5
DR3
Pc40
Pd40
PS
PS
Pi1(Pump)
Pi2(Pump)
ARM
CYLINDER
BUCKET
CYLINDER
BOOM
CYLINDER
TURNING
JOINT
TRAVEL MOTOR
SWING MOTOR
A1
PUMP
A2
PUMP
PILOT
PUMP
HYDRAULIC TANK
Pa20
Pd41
Pc40
Pc41
DOZER
CYLINDER
P02
P04
Pc5
Pd5
Pd6
Pc6
Pu
P1
P2
P3
Pd0
TRAVEL
TRAVEL
BOOM 1
SWING
BOOM 2
ARM 1
OPTION B
OPTION C
(DOZER)
ARM
BUCKET
ARM 2
REGEN
RIGHT
LEFT
When the boom up and bucket functions are operated simultaneously, each spool in the main
control valve is moved to the functional position by the pilot oil pressure from the remote control
valve.
The oil from the A1 pump flows into the boom cylinders through the boom 2 spool in the left control
valve. The oil from the A2 pump flows into the boom cylinders and bucket cylinder through the boom
1 spool, bucket spool and the parallel and confluence oil passage in the right control valve.
Also, when the boom up and bucket in functions are operated simultaneously, the boom up
operation preference function is operated by the pilot pressure P04 and then the bucket spool
transfers in the half stroke not full stroke (refer to page 2-32). Therefore, the most of pressurized oil
flows into boom 1 spool than the bucket spool to make the boom up operation more preferential.
The boom and bucket are operated.
9. COMBINED BOOM UP AND BUCKET OPERATION
9. COMBINED BOOM UP AND BUCKET OPERATION
140L3HC32
Summary of Contents for HX140L
Page 12: ...SECTION 1 GENERAL SECTION 1 GENERAL Group 1 Safety Hints 1 1 Group 2 Specifications 1 10...
Page 209: ...4 5 MEMORANDUM...
Page 694: ...8 68 125LCR8TM30 Turn casing 1 upside down and remove oil seal 3 using jig 29...
Page 734: ...8 108 Assemble plug 2 Plug NPT1 16 11 EA 17 21078TM68 21078TM69 21078TM70 21078TM71...
Page 756: ...8 130 Remove lock nut 22 and then boot 23 14 36078RL14 2507ARL10...