Maintenance Manual
──LG6210E
Hydraulic Excavator
398
Note!
Check valve (12, 16) is installed in the pipe.
Tightening torque: 2.0 ~ 2.5 kgf · m
1.2.3 Hydraulic oil cooling system
Hydraulic oil cooling system,instruction
Refer to cooling system,instruction
1.3 Servo-hydraulic system
1.3.1 Pressure accumulator
Description of the pressure accumulator
• Accumulator is installed between the gear pump and
solenoid valve along with a check valve, and the check
valve prevent the backing of the hydraulic oil filled in the
accumulator.
Nitrogen within the accumulator is compressed by
hydraulic oil released from the gear pump. When the
hydraulic pressure drops, the capacity of compressed gas
will expand, move the accumulation of pressurized
hydraulic oil into the loop.
• If the boom is on the ascending position, operation lever
is operated in case of engine is flameout. Pressure of
compressed nitrogen within the accumulator will transmit
Fig.27 Oil returning pipeline and pump pipeline
Fig.28 Accumulator circuit
1 Check valve
2 Accumulator
3 Solenoid valves
4 Control lever
Summary of Contents for LG6210E
Page 1: ...LG6210E Maintenance Manual Shandong Lingong Construction Machinery Co Ltd...
Page 36: ...Maintenance Manual LG6210E Hydraulic Excavator 18 Engine control specifications Table14...
Page 410: ...Maintenance Manual LG6210E Hydraulic Excavator 392 Fig 23 Hydraulic pump pipeline...
Page 412: ...Maintenance Manual LG6210E Hydraulic Excavator 394 Fig 24 Main valve pipeline...
Page 432: ...Maintenance Manual LG6210E Hydraulic Excavator 414 Fig 42 Main control valve Partial view2...
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Page 751: ...Maintenance Manual LG6210E Hydraulic Excavator 733 Fig 63 Element position...
Page 753: ...Maintenance Manual LG6210E Hydraulic Excavator 735 Fig 65 Element position...
Page 761: ...Maintenance Manual LG6210E Hydraulic Excavator 743 Fig 71 Element positions...
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Page 773: ...Maintenance Manual LG6210E Hydraulic Excavator 755 Fig 83 Element position SCH16...
Page 775: ...Maintenance Manual LG6210E Hydraulic Excavator 757 Fig 85 Element position...