6 - 13
HYDRAULIC CIRCUIT
CASE TRAINING CENTER
AUGUST 2000
Boom Down Load Holding Valve Circuit
When boom down is operated, pilot pressure is supplied at 4a2 and boom (1) spool is changed over.
At the same time, pilot pressure, which is supplied from Ps2, acts on the poppet of the load holding valve,
and the poppet is opened. Then, the hydraulic oil in the spring chamber of the load holding valve check is
returned to the tank line via the load holding valve poppet.
The pressure in the spring chamber of the load holding valve check decreases and the check is released.
The hydraulic oil at the bottom of the boom cylinder is returned to the tank line, the rod of the boom cylinder
shrinks and the boom is lowered.
Boom Down Recycle Circuit
When boom down is operated, pilot pressure is supplied at 4a2 and boom (1) spool is changed over. The
boom load holding valve is opened and oil discharged at the bottom side of the cylinder is recycled to the
head side via the boom (1) spool.
A part of returned oil from the bottom side enters the central bypass, and makes up for the shortage of
pressure without the pump's full operation in order to maintain the negative control pressure at a certain
level, the engine output can be efficiently used.
Boom Down Extra Vibration Prevention Circuit
Due to the bleeding oil passage of the central bypass, a high pressure occurrence is restricted and extra
vibration is reduced even when boom down is operated very quickly, since hydraulic oil is bled.
Summary of Contents for CX130
Page 1: ...HYDRAULIC EXCAVATOR CX130 CASE TRAINING CENTRE AUGUST 2000...
Page 2: ......
Page 3: ...HYDRAULIC EXCAVATOR CX130 CASE TRAINING CENTRE AUGUST 2000 SECTION N 1 GENERALE INTRODUCTION...
Page 4: ...CENTRE DE FORMATION CASE EDITION AOUT 2000...
Page 24: ......
Page 25: ...HYDRAULIC EXCAVATOR CX130 CASE TRAINING CENTRE AUGUST 2000 SECTION N 2 COMPONENTS LAYOUT...
Page 26: ...CENTRE DE FORMATION CASE EDITION AOUT 2000...
Page 33: ...HYDRAULIC EXCAVATOR CX130 CASE TRAINING CENTRE AUGUST 2000 SECTION N 3 COMPONENTS...
Page 34: ...CENTRE DE FORMATION CASE EDITION AOUT 2000...
Page 37: ...COMPONENTS CX130 3 3 CASE TRAINING CENTER AUGUST 2000 Hand remote control...
Page 39: ...COMPONENTS CX130 3 5 CASE TRAINING CENTER AUGUST 2000 Foot control...
Page 41: ...COMPONENTS CX130 3 7 CASE TRAINING CENTER AUGUST 2000 Auxiliary foot control...
Page 53: ...COMPONENTS CX130 3 19 CASE TRAINING CENTER AUGUST 2000 Pump...
Page 54: ...3 20 COMPONENTS CX130 CASE TRAINING CENTER AUGUST 2000 Pump follow...
Page 55: ...COMPONENTS CX130 3 21 CASE TRAINING CENTER AUGUST 2000 Pump follow...
Page 56: ...3 22 COMPONENTS CX130 CASE TRAINING CENTER AUGUST 2000 Pump control block follow...
Page 57: ...COMPONENTS CX130 3 23 CASE TRAINING CENTER AUGUST 2000 Pump control block...
Page 58: ...3 24 COMPONENTS CX130 CASE TRAINING CENTER AUGUST 2000 Pump rotating group assembly follow...
Page 59: ...COMPONENTS CX130 3 25 CASE TRAINING CENTER AUGUST 2000 Pump rotating group assembly follow...
Page 60: ...3 26 COMPONENTS CX130 CASE TRAINING CENTER AUGUST 2000 Pilot pressure pump...
Page 61: ...COMPONENTS CX130 3 27 CASE TRAINING CENTER AUGUST 2000 Pilot pressure pump...
Page 62: ...3 28 COMPONENTS CX130 CASE TRAINING CENTER AUGUST 2000 Proportional solenoid valve...
Page 63: ...COMPONENTS CX130 3 29 CASE TRAINING CENTER AUGUST 2000 Proportional solenoid valve...
Page 68: ...3 34 COMPONENTS CX130 CASE TRAINING CENTER AUGUST 2000 Boom savety valve H B C V...
Page 69: ...COMPONENTS CX130 3 35 CASE TRAINING CENTER AUGUST 2000 Dipper arm savety valve H B C V...
Page 71: ...COMPONENTS CX130 3 37 CASE TRAINING CENTER AUGUST 2000...
Page 73: ...COMPONENTS CX130 3 39 CASE TRAINING CENTER AUGUST 2000...
Page 74: ...3 40 COMPONENTS CX130 CASE TRAINING CENTER AUGUST 2000 Dual flow valve...
Page 75: ...COMPONENTS CX130 3 41 CASE TRAINING CENTER AUGUST 2000 Dual flow valve...
Page 76: ...3 42 COMPONENTS CX130 CASE TRAINING CENTER AUGUST 2000 Swing motor...
Page 77: ...COMPONENTS CX130 3 43 CASE TRAINING CENTER AUGUST 2000 Swing motor...
Page 78: ...3 44 COMPONENTS CX130 CASE TRAINING CENTER AUGUST 2000 Travel motor...
Page 79: ...COMPONENTS CX130 3 45 CASE TRAINING CENTER AUGUST 2000 Travel motor...
Page 80: ...3 46 COMPONENTS CX130 CASE TRAINING CENTER AUGUST 2000 Travel motor follow...
Page 81: ...COMPONENTS CX130 3 47 CASE TRAINING CENTER AUGUST 2000 Travel motor follow...
Page 82: ...3 48 COMPONENTS CX130 CASE TRAINING CENTER AUGUST 2000 Swivel joint...
Page 83: ...COMPONENTS CX130 3 49 CASE TRAINING CENTER AUGUST 2000 Swivel joint...
Page 84: ...3 50 COMPONENTS CX130 CASE TRAINING CENTER AUGUST 2000 Flow restrictor...
Page 85: ...COMPONENTS CX130 3 51 CASE TRAINING CENTER AUGUST 2000 Boom cylinder...
Page 88: ...CENTRE DE FORMATION CASE EDITION AOUT 2000...
Page 103: ...DIAGNOSTIC SELECTION 4 15 CASE TRAINING CENTER AUGUST 2000...
Page 141: ...HYDRAULIC EXCAVATOR CX130 CASE TRAINING CENTRE AUGUST 2000 SECTION N 5 ELECTRICAL...
Page 142: ...CENTRE DE FORMATION CASE EDITION AOUT 2000...
Page 143: ...CENTRE DE FORMATION CASE EDITION AOUT 2000...
Page 190: ......
Page 191: ...HYDRAULIC EXCAVATOR CX130 CASE TRAINING CENTRE AUGUST 2000 SECTION N 6 HYDRAULIC CIRCUIT...
Page 192: ...CENTRE DE FORMATION CASE EDITION AOUT 2000...
Page 193: ...CENTRE DE FORMATION CASE EDITION AOUT 2000...
Page 215: ...HYDRAULIC CIRCUIT 6 22 CASE TRAINING CENTER AUGUST 2000...
Page 219: ...HYDRAULIC CIRCUIT 6 26 CASE TRAINING CENTER AUGUST 2000 Clamshell option Multipurpose option...
Page 223: ...HYDRAULIC CIRCUIT 6 30 CASE TRAINING CENTER AUGUST 2000 PUMP CX 130 Pump engine stopped...
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Page 235: ...HYDRAULIC EXCAVATOR CX130 CASE TRAINING CENTRE AUGUST 2000 SECTION N 7 SETTINGS...
Page 236: ...CENTRE DE FORMATION CASE EDITION AOUT 2000...
Page 260: ......