Komatsu Galeo PC800-8 User Manual

32 PC800, 850-8
SEN00794-02 40 Troubleshooting
H-23 Swing speed or acceleration is low
Failure
phenomenon
• Swing speed or acceleration is low
(1) The swing speed or acceleration is low in both direc-
tions.
Relative
information
• Check that the other work equipment and travel are normal. (If either of them is abnormal, carry out
troubleshooting related to it.)
• When carrying out the following troubleshooting, set the working mode in the P-mode and turn the
swing lock switch OFF.
Possible causes
and standard
value in normal
state
Cause Standard value in normalcy and references for troubleshooting
1 Leakage in swing motor
aKeep the engine stopped for the preparations, and run it at high idle
during troubleshooting.
Left work equipment control lever Leakage from swing motor
Swing relief (in either direction) Max. 10 l/min
2
Malfunction of swing motor
(parking brake)
The parking brake of the swing motor may malfunction. Check it directly.
3
Wrong adjustment or mal-
function of swing motor
(safety valve)
aKeep the engine stopped for the preparations, and run it at high idle
during troubleshooting.
Left work equipment control lever Swing relief pressure
Swing relief
(in either direction)
28.9 MPa
{295 kg/cm
2
}
If the oil pressure is still abnormal after adjustment, the safety valve may
malfunction. Check the safety valve directly.
4
Swing motor (motor unit)
defective internally
The motor unit of the swing motor may have a defect in it. Check it
directly.
5
Swing machinery
defective internally
Swing machinery may have a defect in it. Check it directly. (The swing
machinery can be checked by abnormal sound, abnormal heating, metal
dust in the drained oil, etc.)
+2.5
–0.5
+25
–5

Komatsu Galeo PC800-8 Specifications

General

Brand	Komatsu
Model	Galeo PC800-8
Category	Excavators
Language	English