Komatsu Galeo PC800-8 Shop Manual page 374

SEN00912-02
Measurement conditions for solenoid valve
a The measurement conditions in the following table are for measuring the solenoid valve outlet pressure and
they are a part of the operating condition of each solenoid valve.
No. Solenoid valve
1 PPC lock
2 Travel speed shifting
3 Swing holding brake
4 Machine push-up
5 2-stage relief
6 Travel junction
Swing priority
7
(See note)
Note: The inlet pressure of the swing priority solenoid valve is the boom RAISE PPC circuit pressure. Accord-
ingly, when measuring the outlet pressure, move the boom control lever to the RAISE stroke end (The
boom cylinder may be at the RAISE stroke end).
8
Measurement condition
• Set lock lever in LOCK position.
• Set lock lever in FREE position.
• Set travel speed switch in Lo
position.
• Set travel speed switch in Hi
position.
• Turn swing lock switch ON.
• Measure about 10 seconds
after work equipment-swing
control lever is set in NEU-
TRAL position.
• Turn swing lock switch OFF
and operate work equipment-
swing control lever.
• Turn machine push-up switch
ON.
• Turn machine push-up switch
OFF.
• Turn heavy lift switch OFF.
• Turn heavy lift switch ON and
raise boom singly.
• Operate travel lever.
• Set all control levers in NEU-
TRAL position.
• Operate right and left travel
levers and work equipment-
swing lever simultaneously.
• Turn swing priority switch OFF
and raise boom.
• Turn swing priority switch ON
and raise boom.
Operation of machine
Basic pressure circuit to
PPC valve is closed.
Basic pressure circuit to
PPC valve is opened.
Swash plate angle of travel
motor is set to maximum.
Swash plate angle of travel
motor is set to minimum.
Swing holding brake is
applied.
Swing holding brake is
released.
Boom LOWER safety valve
is set to high pressure.
Boom LOWER safety valve
is set to low pressure.
Main relief valve is set to low
pressure.
Main relief valve is set to
high pressure.
F pump circuit and R pump
circuit are separated.
F pump circuit and R pump
circuit are merged.
Swing priority function is
turned OFF.
Swing priority function is
turned ON.
30 Testing and adjusting
Operation
Oil pressure
of
(MPa {kg/cm 2 })
solenoid
OFF 0 {0}
Min. 2.74
ON
{Min. 28}
OFF 0 {0}
Min. 2.74
ON
{Min. 28}
OFF 0 {0}
Min. 2.74
ON
{Min. 28}
OFF 0 {0}
Min. 2.74
ON
{Min. 28}
OFF 0 {0}
Min. 2.74
ON
{Min. 28}
OFF 0 {0}
Min. 2.74
ON
{Min. 28}
Min. 2.35
OFF
{Min. 24}
ON 0 {0}
PC800, 850-8