SANY LATIN AMERICA
4-158
SY195/205/215/225C9 Crawler Hydraulic Excavator
Structure and Function
Shop Manual - June 2013
●
Improper installation of expansion valve/thermal pipe defect (wide opening)
Symptom: insuf
fi
cient refrigeration
Symptom
Cause
Analysis
Remedy
●
Pressure at both
Hi- and Lo-pressure
ends very high
●
Frosting or conden-
sation on Lo-pres-
sure piping
●
Expansion valve de-
fect, or improper instal-
lation of thermal pipe
●
Over-
fi
lling of
refrigerant in
Lo-pressure
piping
●
Expansion
valve opening
very wide
●
Check the installation of
thermal piping
●
If thermal piping is normal,
check the expansion valve.
Replace defective expan-
sion valve if observed.
ZX215-1002174
0
0
01
02
03
04
05
05
0
0
35
MPa
MPa
{cmHg kgf/cm
2
}
{cmHg kgf/cm
2
}
5
3
30
25
25
20
10
1
15
2
15
35
-01
-01
-76
-76
-50
06
07
08
085
8.5
8
7
5
6
4
3
2
1
15
https://www.tractormanualpdf.info/