SANY LATIN AMERICA
7-105
SY195/205/215/225C9 Crawler Hydraulic Excavator
Troubleshooting
Shop Manual - June 2013
H-9 Work equipment cylinders no response in separate operation
Trouble
●
Boom cylinder gives no response in separate operation.
●
Arm cylinder gives no response in separate operation.
●
Bucket cylinder gives no response in separate operation.
Related information
●
Set working mode to (S) and fuel control dial at position (10) to
carry out troubleshooting.
Possible causes and standard value in normal
state
Cause
Standard value in normal state/Remarks on troubleshooting
1 Malfunction of pilot valve
●
Stop the engine. Perform troubleshooting while the engine is
running at high idle.
Work equipment control lever
Pilot valve output pressure
"NEUTRAL"
0 {0}
DIG or DUMP
≥
3.5MPa
{36 kg/cm²}
2
Failure of pressure sen-
sor
●
Stop the engine. Perform troubleshooting while the engine is
running at high idle.
Check the pressure sensor by replacing it with a new one.
3
Malfunction of control
valve (spool)
Spool of control valve may have malfunction. Check it directly.
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