92
CONTROL VALVE
7c
<Specific relief pressure>
Inspection and adjustment
7c- 3.
Adjusting screw
Pressure gauge
Remove the plug
on the lift section.
221W112E
l
IGBT and FET control
Measurement of relief pressure
If the relief pressure is out of this specification, adjust the
pressure by the adjusting screw.
7c-3-1. Relief pressure - measurement
CAUTION
Use 20MPa {200kgf/cm
2
} pressure gauge.
CAUTION
Turn the adjusting screw gradually, because it is
very sensitive.
Applicable model
Relief pressure
FB10P/14P/15P
13.7 MPa(140 kgf/cm
2
)
FB18P/20P
15.7 MPa(160 kgf/cm
2
)
FB25P/28P/30P
17.2 MPa(175 kgf/cm
2
)
1. Turn off the key switch.
2. Release pressure in the pipings.
(Refer the CAUTION on the page 4.)
3 Remove the plug of the Lift section, and connect the
pressure gauge with the adapter.
4 Turn on the key switch, and pull the Lift lever to the top
end.
Then read the indication of the pressure gauge with
pulling the Lift lever.
Dampner
Adjusting
screw
Remove
H.P. hose
Install the adapter
Pressure
gauge
221W0707E
l
CAN-BUS control
Measurement of relief pressure
If operator does not seat the correct position, all hydraulic
operation including lift lowering can not work.
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