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3-28
When the swing and boom up functions are operated simultaneously, the swing spool and boom
spools in the main control valve are moved to the functional position by the pilot oil pressure from the
remote control valve.
The oil from the A1 pump flows into the swing motor through swing spool and the boom cylinder
through boom 2 spool.
The oil from the A2 pump flows into the boom cylinders through the boom 1 spool in the right control
valve.
The super structure swings and the boom is operated.
Refer to page 3-8 for the boom priority system.
2. COMBINED SWING AND BOOM UP OPERATION
2. COMBINED SWING AND BOOM UP OPERATION
LEFT
RIGHT
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
STRAIGHT
TRAVEL
TRAVEL
BOOM 1
SWING
BOOM 2
ARM 1
OPTION B
OPTION C
(DOZER)
ARM
BUCKET
ARM 2
REGEN
140L3HC24
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...